Academic literature on the topic 'Mines and mineral resources Environmental aspects South Australia'

Mining is essential in the economic development of any country endowed with mineral resources. In Kenya, for instance, one block of coal in the Mui Basin has enough coal to bring in KES. 3.4 trillion into the economy. However, disasters such as the Monongah disaster in a coal mine in the United States have resulted in the loss of lives of numerous workers. It is therefore important to ensure the enactment of legislation safeguarding these workers. This article seeks to assess the extent to which the Occupation Safety and Health Act safeguards these concerns in Kenya. It also undertakes a brief comparative study of the best practices employed in Australia and South Africa in safeguarding the safety and health of workers in coal mines. Finally, the article makes recommendations on how Kenya can follow suit and adopt various aspects of the legislations from these jurisdictions.

The continued access to land for exploration by the petroleum and mineral industries in Australia has been increasingly impeded by State and Commonwealth legislation aimed at dedicating Crown Land for single land uses.In September 1986, South Australia's Minister for Mines and Energy, Ron Payne, announced a Cabinet decision for 'a package of recommendations designed to foster multiple land-use concepts and to ensure that no land is alienated from exploration without careful consideration of the sub-surface mineral/petroleum potential, relevant economic factors and the existing and potential sub-surface rights'.In this one innovative and potentially far-reaching move, the South Australian Government has:provided a framework to reconcile conflicting interests;indicated a willingness to listen and act upon the expressed legitimate concerns of industries of vital economic importance to the State;made it necessary for the proponents of reserve areas such as National Parks to be more accountable and to provide balanced, scientific substantiation;indicated its intention to make legislative changes to allow for the adoption of multiple land-use principles; andredressed the imbalance where, in the words of the Minister, 'Legislation providing for Aboriginal land rights, the creation of national and conservation parks, and State Government heritage areas have, to varying degrees, created unforeseen consequences for the resources industry'.The first practical test of this new Government policy is the proposed declaration of the Innamincka Regional Reserve, currently a 14 000 sq km pastoral lease within some of the most productive areas of PELs 5 & 6 held jointly by Santos Ltd. and Delhi Petroleum Pty. Ltd.It is intended that this new form of reserve will allow for the protection of specific areas of environmental sensitivity and of cultural, scientific and historic value, while still allowing for the continuation of pastoral, tourist and petroleum exploration/ production activity within the major part of the reserve area.

Unconventional energy sources have become increasingly important to the global energy mix. These include coal seam gas, shale gas and shale oil. The unconventional gas industry was pioneered in the United States and embraced following the first oil shock in 1973 (Rogers). As has been the case with many global resources (Hiscock), many of the same companies that worked in the USA carried their experience in this industry to early Australian explorations. Recently the USA has secured significant energy security with the development of unconventional energy deposits such as the Marcellus shale gas and the Bakken shale oil (Dobb; McGraw). But this has not come without environmental impact, including contamination to underground water supply (Osborn, Vengosh, Warner, Jackson) and potential greenhouse gas contributions (Howarth, Santoro, Ingraffea; McKenna). The environmental impact of unconventional gas extraction has raised serious public concern about the introduction and growth of the industry in Australia. In coal rich Australia coal seam gas is currently the major source of unconventional gas. Large gas deposits have been found in prime agricultural land along eastern Australia, such as the Liverpool Plains in New South Wales and the Darling Downs in Queensland. Competing land-uses and a series of environmental incidents from the coal seam gas industry have warranted major protest from a coalition of environmentalists and farmers (Berry; McLeish). Conflict between energy companies wanting development and environmentalists warning precaution is an easy script to cast for frontline media coverage. But historical perspectives are often missing in these contemporary debates. While coal mining and natural gas have often received “boosting” historical coverage (Diamond; Wilkinson), and although historical themes of “development” and “rushes” remain predominant when observing the span of the industry (AGA; Blainey), the history of unconventional gas, particularly the history of its environmental impact, has been little studied. Few people are aware, for example, that the first shale gas exploratory well was completed in late 2010 in the Cooper Basin in Central Australia (Molan) and is considered as a “new” frontier in Australian unconventional gas. Moreover many people are unaware that the first coal seam gas wells were completed in 1976 in Queensland. The first four wells offer an important moment for reflection in light of the industry’s recent move into Central Australia. By locating and analysing the first four coal seam gas wells, this essay identifies the roots of the unconventional gas industry in Australia and explores the early environmental impact of these wells. By analysing exploration reports that have been placed online by the Queensland Department of Natural Resources and Mines through the lens of environmental history, the dominant developmental narrative of this industry can also be scrutinised. These narratives often place more significance on economic and national benefits while displacing the environmental and social impacts of the industry (Connor, Higginbotham, Freeman, Albrecht; Duus; McEachern; Trigger). This essay therefore seeks to bring an environmental insight into early unconventional gas mining in Australia. As the author, I am concerned that nearly four decades on and it seems that no one has heeded the warning gleaned from these early wells and early exploration reports, as gas exploration in Australia continues under little scrutiny. Arrival The first four unconventional gas wells in Australia appear at the beginning of the industry world-wide (Schraufnagel, McBane, and Kuuskraa; McClanahan). The wells were explored by Houston Oils and Minerals—a company that entered the Australian mining scene by sharing a mining prospect with International Australian Energy Company (Wiltshire). The International Australian Energy Company was owned by Black Giant Oil Company in the US, which in turn was owned by International Royalty and Oil Company also based in the US. The Texan oilman Robert Kanton held a sixteen percent share in the latter. Kanton had an idea that the Mimosa Syncline in the south-eastern Bowen Basin was a gas trap waiting to be exploited. To test the theory he needed capital. Kanton presented the idea to Houston Oil and Minerals which had the financial backing to take the risk. Shotover No. 1 was drilled by Houston Oil and Minerals thirty miles south-east of the coal mining town of Blackwater. By late August 1975 it was drilled to 2,717 metres, discovered to have little gas, spudded, and, after a spend of $610,000, abandoned. The data from the Shotover well showed that the porosity of the rocks in the area was not a trap, and the Mimosa Syncline was therefore downgraded as a possible hydrocarbon location. There was, however, a small amount of gas found in the coal seams (Benbow 16). The well had passed through the huge coal seams of both the Bowen and Surat basins—important basins for the future of both the coal and gas industries. Mining Concepts In 1975, while Houston Oil and Minerals was drilling the Shotover well, US Steel and the US Bureau of Mines used hydraulic fracture, a technique already used in the petroleum industry, to drill vertical surface wells to drain gas from a coal seam (Methane Drainage Taskforce 102). They were able to remove gas from the coal seam before it was mined and sold enough to make a profit. With the well data from the Shotover well in Australia compiled, Houston returned to the US to research the possibility of harvesting methane in Australia. As the company saw it, methane drainage was “a novel exploitation concept” and the methane in the Bowen Basin was an “enormous hydrocarbon resource” (Wiltshire 7). The Shotover well passed through a section of the German Creek Coal measures and this became their next target. In September 1976 the Shotover well was re-opened and plugged at 1499 meters to become Australia’s first exploratory unconventional gas well. By the end of the month the rig was released and gas production tested. At one point an employee on the drilling operation observed a gas flame “the size of a 44 gal drum” (HOMA, “Shotover # 1” 9). But apart from the brief show, no gas flowed. And yet, Houston Oil and Minerals was not deterred, as they had already taken out other leases for further prospecting (Wiltshire 4). Only a week after the Shotover well had failed, Houston moved the methane search south-east to an area five miles north of the Moura township. Houston Oil and Minerals had researched the coal exploration seismic surveys of the area that were conducted in 1969, 1972, and 1973 to choose the location. Over the next two months in late 1976, two new wells—Kinma No.1 and Carra No.1—were drilled within a mile from each other and completed as gas wells. Houston Oil and Minerals also purchased the old oil exploration well Moura No. 1 from the Queensland Government and completed it as a suspended gas well. The company must have mined the Department of Mines archive to find Moura No.1, as the previous exploration report from 1969 noted methane given off from the coal seams (Sell). By December 1976 Houston Oil and Minerals had three gas wells in the vicinity of each other and by early 1977 testing had occurred. The results were disappointing with minimal gas flow at Kinma and Carra, but Moura showed a little more promise. Here, the drillers were able to convert their Fairbanks-Morse engine driving the pump from an engine run on LPG to one run on methane produced from the well (Porter, “Moura # 1”). Drink This? Although there was not much gas to find in the test production phase, there was a lot of water. The exploration reports produced by the company are incomplete (indeed no report was available for the Shotover well), but the information available shows that a large amount of water was extracted before gas started to flow (Porter, “Carra # 1”; Porter, “Moura # 1”; Porter, “Kinma # 1”). As Porter’s reports outline, prior to gas flowing, the water produced at Carra, Kinma and Moura totalled 37,600 litres, 11,900 and 2,900 respectively. It should be noted that the method used to test the amount of water was not continuous and these amounts were not the full amount of water produced; also, upon gas coming to the surface some of the wells continued to produce water. In short, before any gas flowed at the first unconventional gas wells in Australia at least 50,000 litres of water were taken from underground. Results show that the water was not ready to drink (Mathers, “Moura # 1”; Mathers, “Appendix 1”; HOMA, “Miscellaneous Pages” 21-24). The water had total dissolved solids (minerals) well over the average set by the authorities (WHO; Apps Laboratories; NHMRC; QDAFF). The well at Kinma recorded the highest levels, almost two and a half times the unacceptable standard. On average the water from the Moura well was of reasonable standard, possibly because some water was extracted from the well when it was originally sunk in 1969; but the water from Kinma and Carra was very poor quality, not good enough for crops, stock or to be let run into creeks. The biggest issue was the sodium concentration; all wells had very high salt levels. Kinma and Carra were four and two times the maximum standard respectively. In short, there was a substantial amount of poor quality water produced from drilling and testing the three wells. Fracking Australia Hydraulic fracturing is an artificial process that can encourage more gas to flow to the surface (McGraw; Fischetti; Senate). Prior to the testing phase at the Moura field, well data was sent to the Chemical Research and Development Department at Halliburton in Oklahoma, to examine the ability to fracture the coal and shale in the Australian wells. Halliburton was the founding father of hydraulic fracture. In Oklahoma on 17 March 1949, operating under an exclusive license from Standard Oil, this company conducted the first ever hydraulic fracture of an oil well (Montgomery and Smith). To come up with a program of hydraulic fracturing for the Australian field, Halliburton went back to the laboratory. They bonded together small slabs of coal and shale similar to Australian samples, drilled one-inch holes into the sample, then pressurised the holes and completed a “hydro-frac” in miniature. “These samples were difficult to prepare,” they wrote in their report to Houston Oil and Minerals (HOMA, “Miscellaneous Pages” 10). Their program for fracturing was informed by a field of science that had been evolving since the first hydraulic fracture but had rapidly progressed since the first oil shock. Halliburton’s laboratory test had confirmed that the model of Perkins and Kern developed for widths of hydraulic fracture—in an article that defined the field—should also apply to Australian coals (Perkins and Kern). By late January 1977 Halliburton had issued Houston Oil and Minerals with a program of hydraulic fracture to use on the central Queensland wells. On the final page of their report they warned: “There are many unknowns in a vertical fracture design procedure” (HOMA, “Miscellaneous Pages” 17). In July 1977, Moura No. 1 became the first coal seam gas well hydraulically fractured in Australia. The exploration report states: “During July 1977 the well was killed with 1% KCL solution and the tubing and packer were pulled from the well … and pumping commenced” (Porter 2-3). The use of the word “kill” is interesting—potassium chloride (KCl) is the third and final drug administered in the lethal injection of humans on death row in the USA. Potassium chloride was used to minimise the effect on parts of the coal seam that were water-sensitive and was the recommended solution prior to adding other chemicals (Montgomery and Smith 28); but a word such as “kill” also implies that the well and the larger environment were alive before fracking commenced (Giblett; Trigger). Pumping recommenced after the fracturing fluid was unloaded. Initially gas supply was very good. It increased from an average estimate of 7,000 cubic feet per day to 30,000, but this only lasted two days before coal and sand started flowing back up to the surface. In effect, the cleats were propped open but the coal did not close and hold onto them which meant coal particles and sand flowed back up the pipe with diminishing amounts of gas (Walters 12). Although there were some interesting results, the program was considered a failure. In April 1978, Houston Oil and Minerals finally abandoned the methane concept. Following the failure, they reflected on the possibilities for a coal seam gas industry given the gas prices in Queensland: “Methane drainage wells appear to offer no economic potential” (Wooldridge 2). At the wells they let the tubing drop into the hole, put a fifteen foot cement plug at the top of the hole, covered it with a steel plate and by their own description restored the area to its “original state” (Wiltshire 8). Houston Oil and Minerals now turned to “conventional targets” which included coal exploration (Wiltshire 7). A Thousand Memories The first four wells show some of the critical environmental issues that were present from the outset of the industry in Australia. The process of hydraulic fracture was not just a failure, but conducted on a science that had never been tested in Australia, was ponderous at best, and by Halliburton’s own admission had “many unknowns”. There was also the role of large multinationals providing “experience” (Briody; Hiscock) and conducting these tests while having limited knowledge of the Australian landscape. Before any gas came to the surface, a large amount of water was produced that was loaded with a mixture of salt and other heavy minerals. The source of water for both the mud drilling of Carra and Kinma, as well as the hydraulic fracture job on Moura, was extracted from Kianga Creek three miles from the site (HOMA, “Carra # 1” 5; HOMA, “Kinma # 1” 5; Porter, “Moura # 1”). No location was listed for the disposal of the water from the wells, including the hydraulic fracture liquid. Considering the poor quality of water, if the water was disposed on site or let drain into a creek, this would have had significant environmental impact. Nobody has yet answered the question of where all this water went. The environmental issues of water extraction, saline water and hydraulic fracture were present at the first four wells. At the first four wells environmental concern was not a priority. The complexity of inter-company relations, as witnessed at the Shotover well, shows there was little time. The re-use of old wells, such as the Moura well, also shows that economic priorities were more important. Even if environmental information was considered important at the time, no one would have had access to it because, as handwritten notes on some of the reports show, many of the reports were “confidential” (Sell). Even though coal mines commenced filing Environmental Impact Statements in the early 1970s, there is no such documentation for gas exploration conducted by Houston Oil and Minerals. A lack of broader awareness for the surrounding environment, from floral and faunal health to the impact on habitat quality, can be gleaned when reading across all the exploration reports. Nearly four decades on and we now have thousands of wells throughout the world. Yet, the challenges of unconventional gas still persist. The implications of the environmental history of the first four wells in Australia for contemporary unconventional gas exploration and development in this country and beyond are significant. Many environmental issues were present from the beginning of the coal seam gas industry in Australia. Owning up to this history would place policy makers and regulators in a position to strengthen current regulation. The industry continues to face the same challenges today as it did at the start of development—including water extraction, hydraulic fracturing and problems associated with drilling through underground aquifers. Looking more broadly at the unconventional gas industry, shale gas has appeared as the next target for energy resources in Australia. Reflecting on the first exploratory shale gas wells drilled in Central Australia, the chief executive of the company responsible for the shale gas wells noted their deliberate decision to locate their activities in semi-desert country away from “an area of prime agricultural land” and conflict with environmentalists (quoted in Molan). Moreover, the journalist Paul Cleary recently complained about the coal seam gas industry polluting Australia’s food-bowl but concluded that the “next frontier” should be in “remote” Central Australia with shale gas (Cleary 195). It appears that preference is to move the industry to the arid centre of Australia, to the ecologically and culturally unique Lake Eyre Basin region (Robin and Smith). Claims to move the industry away from areas that might have close public scrutiny disregard many groups in the Lake Eyre Basin, such as Aboriginal rights to land, and appear similar to other industrial projects that disregard local inhabitants, such as mega-dams and nuclear testing (Nixon). References AGA (Australian Gas Association). “Coal Seam Methane in Australia: An Overview.” AGA Research Paper 2 (1996). Apps Laboratories. “What Do Your Water Test Results Mean?” Apps Laboratories 7 Sept. 2012. 1 May 2013 ‹http://appslabs.com.au/downloads.htm›. Benbow, Dennis B. “Shotover No. 1: Lithology Report for Houston Oil and Minerals Corporation.” November 1975. Queensland Digital Exploration Reports. Company Report 5457_2. Brisbane: Queensland Department of Resources and Mines 4 June 2012. 1 May 2013 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=5457&COLLECTION_ID=999›. Berry, Petrina. “Qld Minister Refuses to Drink CSG Water.” news.com.au, 22 Apr. 2013. 1 May 2013 ‹http://www.news.com.au/breaking-news/national/qld-minister-refuses-to-drink-csg-water/story-e6frfku9-1226626115742›. Blainey, Geofrey. The Rush That Never Ended: A History of Australian Mining. Carlton: Melbourne University Publishing, 2003. Briody, Dan. The Halliburton Agenda: The Politics of Oil and Money. Singapore: Wiley, 2004. Cleary, Paul. Mine-Field: The Dark Side of Australia’s Resource Rush. Collingwood: Black Inc., 2012. Connor, Linda, Nick Higginbotham, Sonia Freeman, and Glenn Albrecht. “Watercourses and Discourses: Coalmining in the Upper Hunter Valley, New South Wales.” Oceania 78.1 (2008): 76-90. Diamond, Marion. “Coal in Australian History.” Coal and the Commonwealth: The Greatness of an Australian Resource. Eds. Peter Knights and Michael Hood. St Lucia: University of Queensland, 2009. 23-45. 20 Apr. 2013 ‹http://www.peabodyenergy.com/mm/files/News/Publications/Special%20Reports/coal_and_commonwealth%5B1%5D.pdf›. Dobb, Edwin. “The New Oil Landscape.” National Geographic (Mar. 2013): 29-59. Duus, Sonia. “Coal Contestations: Learning from a Long, Broad View.” Rural Society Journal 22.2 (2013): 96-110. Fischetti, Mark. “The Drillers Are Coming.” Scientific American (July 2010): 82-85. Giblett, Rod. “Terrifying Prospects and Resources of Hope: Minescapes, Timescapes and the Aesthetics of the Future.” Continuum: Journal of Media and Cultural Studies 23.6 (2009): 781-789. Hiscock, Geoff. Earth Wars: The Battle for Global Resources. Singapore: Wiley, 2012. HOMA (Houston Oil and Minerals of Australia). “Carra # 1: Well Completion Report.” July 1977. Queensland Digital Exploration Reports. Company Report 6054_1. Brisbane: Queensland Department of Resources and Mines. 21 Feb. 2012 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=6054&COLLECTION_ID=999›. ———. “Kinma # 1: Well Completion Report.” August 1977. Queensland Digital Exploration Reports. Company Report 6190_2. Brisbane: Queensland Department of Resources and Mines. 21 Feb. 2012 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=6190&COLLECTION_ID=999›. ———. “Miscellaneous Pages. Including Hydro-Frac Report.” August 1977. Queensland Digital Exploration Reports. Company Report 6190_17. Brisbane: Queensland Department of Resources and Mines. 31 May 2012 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=6190&COLLECTION_ID=999›. ———. “Shotover # 1: Well Completion Report.” March 1977. Queensland Digital Exploration Reports. Company Report 5457_1. Brisbane: Queensland Department of Resources and Mines. 22 Feb. 2012 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=5457&COLLECTION_ID=999›. Howarth, Robert W., Renee Santoro, and Anthony Ingraffea. “Methane and the Greenhouse-Gas Footprint of Natural Gas from Shale Formations: A Letter.” Climatic Change 106.4 (2011): 679-690. Mathers, D. “Appendix 1: Water Analysis.” 1-2 August 1977. Brisbane: Government Chemical Laboratory. Queensland Digital Exploration Reports. Company Report 6054_4. Brisbane: Queensland Department of Resources and Mines. 21 Feb. 2012 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=6054&COLLECTION_ID=999›. ———. “Moura # 1: Testing Report Appendix D Fluid Analyses.” 2 Aug. 1977. Brisbane: Government Chemical Laboratory. Queensland Digital Exploration Reports. Company Report 5991_5. Brisbane: Queensland Department of Resources and Mines. 22 Feb. 2012 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=5991&COLLECTION_ID=999›. McClanahan, Elizabeth A. “Coalbed Methane: Myths, Facts, and Legends of Its History and the Legislative and Regulatory Climate into the 21st Century.” Oklahoma Law Review 48.3 (1995): 471-562. McEachern, Doug. “Mining Meaning from the Rhetoric of Nature—Australian Mining Companies and Their Attitudes to the Environment at Home and Abroad.” Policy Organisation and Society (1995): 48-69. McGraw, Seamus. The End of Country. New York: Random House, 2011. McKenna, Phil. “Uprising.” Matter 21 Feb. 2013. 1 Mar. 2013 ‹https://www.readmatter.com/a/uprising/›.McLeish, Kathy. “Farmers to March against Coal Seam Gas.” ABC News 27 Apr. 2012. 22 Apr. 2013 ‹http://www.abc.net.au/news/2012-04-27/farmers-to-march-against-coal-seam-gas/3977394›. Methane Drainage Taskforce. Coal Seam Methane. Sydney: N.S.W. Department of Mineral Resources and Office of Energy, 1992. Molan, Lauren. “A New Shift in the Global Energy Scene: Australian Shale.” Gas Today Online. 4 Nov. 2011. 3 May 2012 ‹http://gastoday.com.au/news/a_new_shift_in_the_global_energy_scene_australian_shale/064568/›. Montgomery, Carl T., and Michael B. Smith. “Hydraulic Fracturing: History of an Enduring Technology.” Journal of Petroleum Technology (2010): 26-32. 30 May 2012 ‹http://www.spe.org/jpt/print/archives/2010/12/10Hydraulic.pdf›. NHMRC (National Health and Medical Research Council). National Water Quality Management Strategy: Australian Drinking Water Guidelines 6. Canberra: Australian Government, 2004. 7 Sept. 2012 ‹http://www.nhmrc.gov.au/guidelines/publications/eh52›. Nixon, Rob. “Unimagined Communities: Developmental Refugees, Megadams and Monumental Modernity.” New Formations 69 (2010): 62-80. Osborn, Stephen G., Avner Vengosh, Nathaniel R. Warner, and Robert B. Jackson. “Methane Contamination of Drinking Water Accompanying Gas-Well Drilling and Hydraulic Fracturing.” Proceedings of the National Academy of Sciences 108.20 (2011): 8172-8176. Perkins, T.K., and L.R. Kern. “Widths of Hydraulic Fractures.” Journal of Petroleum Technology 13.9 (1961): 937-949. Porter, Seton M. “Carra # 1:Testing Report, Methane Drainage of the Baralaba Coal Measures, A.T.P. 226P, Central Queensland, Australia.” Oct. 1977. Queensland Digital Exploration Reports. Company Report 6054_7. Brisbane: Queensland Department of Resources and Mines. 21 Feb. 2012 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=6054&COLLECTION_ID=999›. ———. “Kinma # 1: Testing Report, Methane Drainage of the Baralaba Coal Measures, A.T.P. 226P, Central Queensland, Australia.” Oct. 1977. Queensland Digital Exploration Reports. Company Report 6190_16. Brisbane: Queensland Department of Resources and Mines. 21 Feb. 2012 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=6190&COLLECTION_ID=999›. ———. “Moura # 1: Testing Report: Methane Drainage of the Baralaba Coal Measures: A.T.P. 226P, Central Queensland, Australia.” Oct. 1977. Queensland Digital Exploration Reports. Company Report 6190_15. Brisbane: Queensland Department of Resources and Mines. 21 Feb. 2012 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=6190&COLLECTION_ID=999›. QDAFF (Queensland Department of Agriculture, Fisheries and Forestry). “Interpreting Water Analysis for Crop and Pasture.” 1 Aug. 2012. 1 May 2013 ‹http://www.daff.qld.gov.au/ 26_4347.htm›. Robin, Libby, and Mike Smith. “Prologue.” Desert Channels: The Impulse To Conserve. Eds. Libby Robin, Chris Dickman and Mandy Martin. Collingwood: CSIRO Publishing, 2010. XIII-XVII. Rogers, Rudy E. Coalbed Methane: Principles and Practice. Englewood Cliffs: Prentice Hill, 1994. Sell, B.H. “T.E.P.L. Moura No.1 Well Completion Report.” October 1969. Queensland Digital Exploration Reports. Company Report 2899_1. Brisbane: Queensland Department of Resources and Mines. 26 Feb. 2013 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=2899&COLLECTION_ID=999›. Senate. Management of the Murray Darling Basin: Interim Report: The Impact of Coal Seam Gas on the Management of the Murray Darling Basin. Canberra: Rural Affairs and Transport References Committee, 2011. Schraufnagel, Richard, Richard McBane, and Vello Kuuskraa. “Coalbed Methane Development Faces Technology Gaps.” Oil & Gas Journal 88.6 (1990): 48-54. Trigger, David. “Mining, Landscape and the Culture of Development Ideology in Australia.” Ecumene 4 (1997): 161-180. Walters, Ronald L. Letter to Dennis Benbow. 29 August 1977. In Seton M. Porter, “Moura # 1: Testing Report: Methane Drainage of the Baralaba Coal Measures: A.T.P. 226P, Central Queensland, Australia.” October 1977, 11-14. Queensland Digital Exploration Reports. Company Report 6190_15. Brisbane: Queensland Department of Resources and Mines. 21 Feb. 2012 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=6190&COLLECTION_ID=999›. WHO (World Health Organization). International Standards for Drinking-Water. 3rd Ed. Geneva, 1971. Wilkinson, Rick. A Thirst for Burning: The Story of Australia's Oil Industry. Sydney: David Ell Press, 1983. Wiltshire, M.J. “A Review to ATP 233P, 231P (210P) – Bowen/Surat Basins, Queensland for Houston Oil Minerals Australia, Inc.” 19 Jan. 1979. Queensland Digital Exploration Reports Database. Company Report 6816. Brisbane: Queensland Department of Resources and Mines. 21 Feb. 2012 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=6816&COLLECTION_ID=999›. Wooldridge, L.C.P. “Methane Drainage in the Bowen Basin – Queensland.” 25 Aug. 1978. Queensland Digital Exploration Reports Database. Company Report 6626_1. Brisbane: Queensland Department of Resources and Mines. 31 May 2012 ‹https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?REPORT_ID=6626&COLLECTION_ID=999›.

One of the greatest challenges facing the world today is integrating industrial activities such as mining with environmental integrity and social concerns. Monitoring is fundamental to environmental management, both to assess the adherence to standards and to allow environmental managers to learn from practical experiences. However, a problem arises when the regulatory authorities cannot keep up with their mandate of enforcement and compliance monitoring. This research examined how the Department of Minerals and Energy (DME) implements the concept of sustainable development in the mining sector of the Eastern Cape (EC) and, more specifically, the extent to which the Mine Environmental Management (MEM) section is able to effectively monitor compliance of mining operations with environmental legislation. This was the first systematic compilation of statistical data for the DME, and presents the first study in the EC regional office in terms of environmental sustainability. Results indicate that there has been a sustained increase in mining activity over the past three years, possibly as a result of the boom in the construction industry and the accelerated road maintenance and improvement programmes in the Eastern Cape. Mining applications received by the DME have increased by 47% from 2006 to 2007 (January-May) and by a further 100% from 2007 to 2008. In addition to the increasing number of mining concerns being established, 98 mining concerns will need to apply for the conversion of their old order rights to new order rights by the 1st May 2009. Mining in the province is predominantly small scale with mining permits (mined areas less than 1.5Ha) making up 52.3% of all applications, with larger mining concerns contributing 29.3% and prospecting contributing the remaining 18.4%. In terms of compliance inspections, the EC regional office is required to conduct 120 environmental compliance inspections annually in terms of contributing to sustainable development. The MEM section exceeded this target since 2003. However, when the number of operational mines is considered, 120 inspections per year equates to one mine being visited, on average once every four years (based on 2008 data). Based on projected figures (number of compliance audits and number of operational mines) for 2009, the DME’s target of 150 inspections for 2009/10 combined with the limited staff D. Watkins – MBA Dissertation 2008 capacity will, at best, mean that mines would be inspected once in seven years. However, the target of 150 inspections will not actually even cover the expected number of EMP evaluation inspections. This has serious implications in terms of regulating the compliance of the mining concerns with their EMPR’s. The low level of compliance monitoring can be directly related to staff capacity and logistics problems at the regional office as well as provincial targets being based on staff capacity rather than the number of operational mines. Thus, considering potential environmental damage associated with mining operations and the capacity constraints of the MEM to conduct frequent compliance audits, it is likely that mining operations will have negative implications for sustainable development in the region. Currently there are many challenges facing the DME in terms of contributing positively to sustainability in the mining sector and there is a need to base future actions on the idea of continuous improvement and ultimately progress.

Thesis (LLM) -- University of Limpopo, 2012
The study focuses on rehabilitation, since absence of proper rehabilitation process result in indelible damage to the environment. South Africa, like many other countries, is faced with many environmental problems caused by mining. These problems are particularly caused by, inter alia, abandoned mining areas without rehabilitation, inadequate environmental impact assessment after closure, inadequate financial provision for rehabilitation, and lack of monitoring and aftercare system after post mine closure. The study found that many Companies ignore laws governing prospecting, extraction and rehabilitation. The main purpose of this research is to investigate and recommend guidelines in the rehabilitation process so as to instil respect for the environment. The study therefore recommended strict legislation relating to environmental protection against mining.

South Africa has less than 1 percent of the global land surface, yet it is ranked highly in terms of remaining mineral resources. Mineral wealth has not translated into a better life for all. Poverty, however, abounds; particularly in the rural areas and this study seeks to identify a solution or partial solution to this situation. The study combines two critical areas, Mineral Based Rural Development, and Mineral Based Enterprise Development and draws from it a model for Mineraldriven Rural Economic Development viable for all parts of South Africa. This study comprised research on a national scale and thus covered a section of each of South Africa‟s nine provinces. It investigated the conditions in rural and urban centres, and geologically, it traversed examples of Archaean, Proterozoic and Phanerozoic formations. The field visits deliberately set out to look at some of the lowest value commodities; typically the only minerals available to the surrounding rural communities. This was done to see if a case could be made for even the lowest value commodities which are often found furthest from the large markets. This study indicates that for a rural area to be able to compete nationally or internationally, it is important to be competitive so that the area can participate in the economy. The creation of regional competitive areas allow for the focusing of strategies and funding for targeted rural projects. Enterprises, typically the product of entrepreneurial activity, are required to increase economic intensity and activity. xxvii The goal of poverty reduction, has been identified by government so that enterprises, as products of economic development, can be focused on the situation. Interviews conducted by the researcher indicated that part of the problem to overcome is the bureaucracy created by government which hinders enterprise development. Recommendations are made that government should exempt rural enterprises from some of the compliance hurdles. This will serve to accelerate rural development. An important aspect of urban enterprises is that they have access to labour without too many problems. Thirteen developed or developing corridors were visited of the five types of development corridors identified. It was found that those in areas of high poverty (for example the corridors of the Eastern Cape) are difficult to develop and make self-sustaining. The corridors linked to any point of Gauteng (Johannesburg or Pretoria) are more robust, although the relatively short length of the corridor is not an indicator of effectiveness. The key recommendations made include the completion of a national rural mineral-asset audit; the use of the information to demarcate rural-regions that can be developed as nationally and internationally competitive regions; the establishment of a rural Resource and Training Academy(ies) so that skills are developed close to areas where they will be deployed; provision of an easier way to launch mineral-based rural enterprises and incentivise these for accelerated development; and the development of an indigenous body of knowledge to mine small scale deposits

Thesis (MPhil)--Stellenbosch University, 2011.
ENGLISH ABSTRACT: Ecosystems, and the very services and resources that they provide, are fundamental to our existence. Regardless, mankind shows scant regard for the biotic and abiotic components of the environment that serve as both sources and sinks for anthropocentric demands, practices and behaviours. Of these vital resources, perhaps the one that is most under threat is water which while crucial for growth and development around the globe, is rapidly becoming a scarce commodity. In South Africa - already a water-scarce country - this situation is further compounded by mining practices that are not only unsustainable, but also largely unregulated from an environmental perspective. Mining activities have resulted in the mass exposure of iron pyrite and heavy metals, both underground and on the surface. Upon exposure to weathering, the iron pyrite gives rise to sulphuric acid, which, in turn results in the mobilisation and concentration of toxic metals. Although this is a geological phenomenon, the increasing concentrations of toxic metals as a result of mining have exposed the Gauteng province to enormous environmental, social and economic risks. Concerning the risks, the research highlighted the following: - Although comprehensive research has been found relating to the physical attributes of acid mine drainage (AMD), very little is known of the health aspects associated with AMD. Of immediate concern is, the subsequent environmental and health implications stemming from the association between living organisms and heavy metals. - In the absence of such information, the credibility of current solutions is thus questionable. Of the solutions that have been proposed, most have been reductionist in approach and have only focused on dealing with the surface decant of contaminated water from predominately non-functioning mines. The health risks associated with radioactive and highly toxic waste have been down played or simply ignored (Albrecht, 2011). - The absence of a comprehensive solution also raises questions as to the assessment and decision-making process utilised to date by the Department of Water Affairs (DWA). - Both government and the private sector have allowed the AMD threat to amplify over the years. Their inaction has been facilitated by the poor enforcement of legislation and, clever manoeuvring by mining companies, in what can only be described as a mutually beneficial relationship between government and the mining industry. In stark contrast to the inaction of government and the private sector, environmental activists have been very vocal in calling for a solution to a number of the risks associated with AMD. This, together with the recent decant of AMD in the Western Basin, has culminated in a public outcry and prompted calls for a solution to the AMD threat. Government's response to this was a narrow and incomprehensive solution, which only served to further frustrate the different stakeholder groups. Where stakeholders have different themes as to the implications and thus solutions to the AMD threat on the Witwatersrand (as driven by the profiles of the different stakeholder groups), an appropriate solution will only be realised by adopting the following recommendations: - Government must show the necessary political will, to fully engage the threat of AMD and address their poor track record as regulator - their credibility has been skewed through their vested interests in the mining industry. - Having taken ownership of the AMD threat on the Witwatersrand, government must move to avert any immediate risks to human well-being. - Under governments' leadership, the capacity of all stakeholders must be addressed to facilitate a participatory trans-disciplinary review of the assessment mechanisms and facts, in order to reach a mutually acceptable solution(s) to the social and environmental impacts associated with mining activities - a solution that will ensure future environmental integrity, social development and economic growth.
AFRIKAANSE OPSOMMING: Ekosisteme, en die dienste en hulpbronne wat dit voorsien, is grondliggend aan die mensdom se bestaan. Tog toon die mensdom weinig respek vir die biotiese en abiotiese komponente van die omgewing, hoewel ons met ons behoeftes, praktyke en gedrag daarop staatmaak én daaraan afbreuk doen. Van hierdie lewensnoodsaaklike hulpbronne is die mees bedreigde waarskynlik water, wat – hoewel dit vir groei en ontwikkeling wêreldwyd van deurslaggewende belang is – spoedig besig is om ʼn skaars kommoditeit te word. In Suid-Afrika, wat in elk geval ʼn waterarm land is, word hierdie toedrag van sake vererger deur mynboupraktyke wat nie net onvolhoubaar is nie maar ook ongereguleerd. Mynboubedrywighede het gelei tot die massablootstelling van ysterpiriet en swaarmetale, sowel ondergronds as op die oppervlak. Wanneer ysterpiriet chemies verweer, vorm dit swawelsuurwater, wat op sy beurt toksiese metale mobiliseer en konsentreer. Hoewel dít ʼn geologiese verskynsel is, het hierdie verhoogde konsentrasies as gevolg van mynbou die Gautengprovinsie aan enorme omgewings-, maatskaplike en ekonomiese risiko’s blootgestel. Wat die risiko’s betref, beklemtoon hierdie studie die volgende: - Hoewel omvattende navorsing oor die fisiese kenmerke van suur mynwater (“acid mine drainage” – AMD) onderneem is, is weinig bekend oor die gesondheidsaspekte wat daarmee gepaardgaan. Wat tot dusver van onmiddelliker belang was, was die omgewings- en gesondheidsimplikasies wat daaruit voortvloei wanneer lewende organismes aan swaarmetale blootgestel word. - In die afwesigheid van sodanige inligting is die geloofwaardigheid van huidige oplossings dus twyfelagtig. Die meeste van die oplossings wat voorgestel is, is reduksionisties van aard en beklemtoon slegs die hantering van besoedelde water wat op die oppervlak uit hoofsaaklik onaktiewe myne sypel. Die gesondheidsgevare wat met radio-aktiewe en hoogs toksiese afval gepaardgaan, word geheel en al onderspeel of bloot misgekyk (Albrecht, 2011). - Die gebrek aan ʼn omvattende oplossing laat ontstaan ook vrae oor die beoordelings- en besluitnemingsprosesse wat die Departement van Waterwese oor die jare sowel as meer onlangs gevolg het. - Sowel die regering as die privaat sektor het toegekyk hoe die bedreiging deur suur mynwater oor die jare vererger. Dié gebrek aan optrede is aangehelp deur swak wetstoepassing sowel as slimmer bewimpeling deur mynboumaatskappye in wat eenvoudig as ʼn wedersyds voordelige verhouding tussen die regering en die mynboubedryf beskryf kan word. In skrille kontras met die regering en privaat sektor se traagheid het omgewingsaktiviste nog nooit geskroom om hul stem te verhef en op oplossings vir baie van hierdie risiko’s aan te dring nie. Dít, tesame met die onlangse uitvloei van suur mynwater in die Westelike Kom, het op openbare protes uitgeloop en aanleiding gegee tot oproepe om ʼn oplossing vir die bedreiging van suur mynwater. Die regering se antwoord hierop was ʼn eng, beperkte oplossing wat die verskillende belangegroepe slegs verder frustreer het. Aangesien belangegroepe (in ooreenstemming met hul uiteenlopende profiele) verskillende aspekte van die implikasies van – en dus ook die oplossings vir – die bedreiging van suur mynwater aan die Witwatersrand beklemtoon, sal ʼn toepaslike oplossing gevind word slegs deur die volgende aanbevelings te aanvaar: - Die regering moet die nodige politieke wil toon om die bedreiging van suur mynwater ten volle die hoof te bied, en moet daadwerklik verbeter op sy swak prestasiegeskiedenis as reguleerder, waarin hy heelwat geloofwaardigheid ingeboet het vanweë regeringsbelang by die mynboubedryf. - Nadat die regering sy verantwoordelikheid rakende die bedreiging van suur mynwater aan die Witwatersrand aanvaar het, moet hy dringend optree om enige onmiddellike gevare vir menslike welstand te voorkom. - Onder leiding van die regering moet die vermoëns van alle belanghebbendes betrek word ten einde ʼn deelnemende, kruisdissiplinêre beoordeling van die meganismes en feite te onderneem, om sodoende (ʼn) wedersyds aanvaarbare oplossing(s) vir die maatskaplike en omgewingsimpak van mynboubedrywighede te bedink – ʼn oplossing wat die integriteit van die omgewing, maatskaplike ontwikkeling en ekonomiese groei sal verseker.

The Mining industry in South Africa is viewed as the backbone of the country’s economy, while benefiting from this engine of economic development, its impact on the environment and health has been of a major concern to different stakeholders. The majority of people acknowledge the role of mining in the economy and the country. Others put more emphasis on public health and the environment. The aim of the study was then to assess the impact of environmental pollution and public health on the Sasolburg community from a developmental perspective. The present study can be described as a quantitative descriptive survey that uncovered serious levels of pollution in Sasolburg that had dire health consequences for people involved. The findings of the study indicate that residents live with the constant smell of a variety of chemical pollutants released both by normal production and by periodic incidents. They experience chronic respiratory symptoms, burning eyes, hearing deficiency and skin irritations. The study revealed that environmental pollution consequences affecting residents are inversely related to distance from the mines. The results obtained in this study are evidence that environmental pollution in the Sasolburg area is a definite risk to the health of people living within the surrounding area. Although indicating the need to carry out a comprehensive study, the results call for immediate action to prevent continued public over-exposure to environmental pollution.

M.Sc. (Environmental Management)
South Africa is exceptionally rich in biodiversity. South Africa has been recognized as the third most biologically diverse country in the world, and has three globally recognized biodiversity hotspots; namely the Cape floristic, the Succulent Karoo and the Maputaland-Pondoland regions (NSBA, 2004). South Africa’s seas straddle three oceans, and provide a range of habitats from cool water kelp forests, to tropical reefs and deep ocean abyss (NSBA, 2004). Unfortunately, due to various pressures, many ecosystems are in trouble: 34% of terrestrial systems, 82% of river signatures, 65% of marine biozones and 8 estuarine types are threatened (NSBA, 2004). Mining has been identified as one of the sectors impacting negatively on biodiversity; the other significant pressures being agriculture, afforestration, urban and industrial development, extractive fishing, alien invasives and climate change (NSBA, 2004). The concept of ‘biodiversity offsets’ is relatively new and there are only generic methods whichare ill suited to determine appropriate biodiversity offsets in the South African context. The rationale for biodiversity offsets in South Africa is two-fold: firstly, South Africa contains biodiversity that is unique globally; secondly, its ecosystems underpin socioeconomic development and delivery of important services such as the reliable supply of clean water, ecotourism and coastal protection. Land-intensive development poses a significant threat to the countries remaining biodiversity. South African policies have, over the past few years, increasingly prioritised the conservation of biodiversity and important ecosystem services (Department of Environmental Affairs and Development Planning, 2007). The motivation for this is a decline in global biodiversity (WWF & ZSL, 2012). Land use changes are the main motivation for identifying the need for creating a system within the planning process that tackles unavoidable and residual impacts to biodiversity. The implementation of EIA in South Africa in terms of the National Environmental Management Act (No. 107 of 1998) allowed for the formal evaluation of impacts to habitat, wildlife and other natural considerations to be done as a prerequisite for developers to receive approval for a project to go ahead (BBOP, 2000). The aim of this study was to compare the current South African biodiversity offset approach to that of offset banking and no net loss or net gain principles as a feasible and beneficial alternative. A structured interview process was conducted to ascertain current understanding and perceptions relating to biodiversity offsets, biodiversity offset guidelines and regulations, offset banking, relevant experience and perceptions to determine the current level of understanding in the mining sector and with environmental consultants. This aided in determining whether biodiversity offset practices in its current form in South Africa were understandable, can be implemented effectively and achieves the rationale of biodiversity offset banking.

A dissertation submitted to the Faculty of Science, University of the Witwatersrand in fulfilment of the requirements for the degree of Master of Science Johannesburg 2017.
The development of the economy of South Africa and many other countries has been highly dependent on mining industries. Minerals such as gold, platinum, diamond and many others have been mined and continue to be mined. Despite the importance of these minerals, their processing comes with social and environmental problems. During the processing of these minerals, trace elements such as copper, chromium, nickel, mercury, uranium, molybdenum and many others are released as wastes into the environment either, directly or indirectly. The release of the elements into the soil is of concern due to the possibility of groundwater system contamination. The presence of these elements in the groundwater system poses serious challenges to the wellbeing of life forms, due to their toxicity, when they exceed threshold limits. From the processing plants, these elements could be released onto the soil, and mobilise to groundwater, increasing the already existing environmental crisis due to water pollution. Once these elements are in the water, access to living organisms becomes easier through the food chain. Some of these elements are not biodegradable and thus persist in the environment as well as in the bodies of living organisms. They can cause serious health problems because of their toxicity effect. In humans, these elements can be carcinogenic, and also cause chronic disorders, kidney failures, defects in infants, bone and vascular diseases which could also be lethal. It is therefore of importance that these elements are neither bioavailable nor bioaccessible to living organisms. When these elements are mobile in the soil, the probability of reaching groundwater increases. Water, an important natural resource should always be protected from such pollutants. The demand for unpolluted water has been rising every year in the world due to increasing population, extended droughts and improper disposal. This research was dedicated to determining the behaviour of elements in an agricultural soil impacted by mining activities. Agricultural soils are sometimes exposed to pollutants that could originate from dust fallout or precipitation; fertilisers and manure; pesticides; and water used for irrigation. Understanding the iv processes that control the distribution of these pollutants in agricultural soils is an important risk assessment measure, considering that such pollutants have the potential of being taken up by crops and vegetables or transported to groundwater. In this study, a soil on a farm that grows vegetables for commercial purpose. Cabbage, spinach, carrots and potatoes are some of the vegetables grown on the plot and sold to markets in Pretoria and Johannesburg. The plot is in the vicinity of smelting operations in the North West Province. The mobility of trace elements in the soil can be controlled, depending on the type and properties of soil. Hence in this research, the ability of the soil to adsorb elements entering the soil is studied. The batch experimental work was performed to determine the effect of pH, initial concentration (5 - 100 mg/L), competing ions (Fe3+, Ca2+, Co2+, Mg2+, K+, Ni2+ and Zn2+), fertilisers (ammonium nitrate, ammonium phosphate and calcium chloride) and plant exudates (acetic acid, citric acid and oxalic acid as well as ethylenediaminetetraacetic acid (EDTA) which is often used as proxy organic ligand (found in manure)) on the adsorption of cadmium (Cd), copper (Cu) and chromium (Cr) onto an agricultural soil. The PHREEQC geochemical modelling code was used to complement experimental methods in predicting processes and to further assess the leaching behaviour of the elements. Powder X-ray diffraction (PXRD) and X-ray fluorescence (XRF) were used to determine the mineralization of the soil. The structural features of the soil were determined using Fourier Transform Infrared spectroscopy (FTIR) and the element content was determined using Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The point of zero charge (PZC) of the soil was found to be 8.3 and the cation exchange capacity (CEC) of 51.6 meq/ 100g. In the absence of fertilisers and plant exudates, the soil exhibited a similar high adsorption for elements at all initial concentrations by all the elements. Most (> 90%) of the elements were adsorbed within the first 3 minutes of contact with the soil. Langmuir, Freundlich and Dubinin-Radushkevich adsorption isotherms were used to describe the experimental data for the elements. Kinetic rates were modelled using pseudo first-order and pseudo second-order equations. Pseudo v second-order gave the best fit for all the elements (R2 >0.999) indicating chemisorption. The effect of pH on Cd and Cu was insignificant however, the adsorption of Cr decreased with pH. The presence of competing ions decreased the adsorption of cadmium more than that of the other analyte elements. The soil was generally effective in adsorbing and retaining the elements. However, the retention was highly dependent on elemental speciation and prevailing conditions e.g. pH (as in the case of Cu and Cr). Such changes in conditions would have implications for groundwater quality. The effect of plant exudates and EDTA was studied and the results showed that low molecular weight organic acids (LMWOAs) viz acetic acid (AA), citric acid (CA) and oxalic acid (OA) and EDTA significantly (p < 0.05) decreased the adsorption capacity of the elements onto the agricultural soil. AA had the least effect on the adsorption capacity of the elements whereas OA and EDTA strongly prevented the adsorption of the elements. Moreover, some of the elements which were already in the soil including those which were not under study such as Ca and Mg were desorbed from the soil by OA and EDTA. Thus, the mobility of the elements was increased by the presence of plant exudates, increasing groundwater contamination and consequently threatening the health of living organisms. Agrochemicals such as fertilisers, stabilizers and pesticides are constantly applied to agricultural soils to improve the fertility of the soil for better crop production however; their presence may affect the mobility and bioavailability of elements in the soil. The effect of ammonium nitrate and ammonium phosphate as well as calcium chloride on the adsorption of Cd, Cu and Cr onto an agricultural soil was studied. The effects of initial concentrations of the elements (5 – 50 mg/L), concentrations of fertilisers (0.01 – 0.1 mol/L) and pH (3 - 8) on the adsorption of Cd, Cu and Cr were studied. The initial concentration of the elements and the concentration of fertilisers had no significant effect (p > 0.05) on the adsorption capacities of Cu and Cr at pH 5. But, ammonium nitrate and calcium chloride decreased the adsorption capacity of Cd. The adsorption of Cd onto the soil was reduced as the concentration of fertilisers increased. The adsorption of Cd was lower than that of Cu and Cr at all pH values. The agricultural soil was found to vi be an effective adsorbent in preventing the mobility of Cu and Cr in the presence of fertilisers but not for Cd whose adsorption was significantly affected by the presence of ammonium nitrate and calcium chloride. A continuous flow fixed-bed column script with specified conditions simulating the natural environment was utilised in PHREEQC for column studies. The geochemical computer model PHREEQC can simulate solute transport in soil surfaces. The effect of initial concentration (100 and 300 mg/L) of the elements, column bed depth (5 and 10 cm) and pH (3, 5, 7 and 10) were considered in this study. The adsorption capacity was affected by initial concentration of the elements since the breakthrough curves at higher analyte concentrations were reached at lower pore volumes than at low concentrations. This can be attributed to the fast occupation of active sites of the soil at higher concentrations. The results from PHREEQC indicated that the conditions used would lead to the oxidation of Cr3+ to Cr6+ leading to the formation of HCrO4- and Cr2O72- which were not favoured for adsorption by soil surfaces due to high solubility. This could have potential implications on the quality of groundwater in regions with similar conditions. Thus, the leaching of Cr6+ onto the agricultural soil will be high in areas where remediation techniques are not applied. The changing of bed depth from 5 to 10 cm did not have an effect on the adsorption of the elements. The ability of the soil surfaces to adsorb Cd and Cu even at lower bed depth implies that the soil will be effective in preventing the leaching of the elements to groundwater due to strong surface interactions of the elements with the soil. The results from PHREEQC showed that the adsorption of Cd and Cr onto the soil surface was not affected by pH. The results for Cr were contradicting with those obtained from laboratory experiments which could be due to the conditions used in PHREEQC. The change in the speciation of Cu at basic conditions decreased the ability of Cu adsorption onto the soil surfaces. The Cu2+ was converted to Cu(OH)2 which were large in size and thus only a small amount could be adsorbed since the other adsorption sites were covered by the large species. This research had notable outputs in the form of publications which will form an important repository of information.
LG2017

One of the signature historical phenomena of the past 500 years has been the global expansion of European societies and their trans-Atlantic offshoots. The mercantile networks, commercial systems, and empires of conquest and colonization that formed the political and economic framework of that expansion involved the discovery and extraction of new mineral and agricultural resources, the establishment of new infrastructures of transport and communication, and the forcible relocation of millions of people. Another key component was the Columbian Exchange, the multiple transfers of people, animals, plants, and microbes that began even before Columbus, gathered pace after 1492, and were further fuelled as European settlement advanced into Africa, Australasia, and the Indian and Pacific Oceans. Donkeys evolved in the Old World and were confined there until the Columbian Exchange was underway. This chapter explores the introduction of the donkey and the mule to the Americas and, more briefly, to southern Africa and Australia. In keeping with my emphasis on seeking archaeological evidence with which to illuminate the donkey’s story, I omit other aspects of its expansion, such as the trade in animals to French plantations on the Indian Ocean islands of Réunion and Mauritius or, on a much greater scale, India to meet the demands of the British Raj. These examples nevertheless reinforce the argument that mules and donkeys were instrumental in creating and maintaining the structures of economic and political power that Europeans and Euro- Americans wielded in many parts of the globe. From Brazil to the United States, Mexico to Bolivia, Australia to South Africa, they helped directly in processing precious metals and were pivotal in moving gold and silver from mines to centres of consumption. At the same time, they aided the colonization of vast new interiors devoid of navigable rivers, maintained communications over terrain too rugged for wheeled vehicles to pose serious competition, and powered new forms of farming. Their contributions to agriculture and transport were well received by many of the societies that Europeans conquered and their mestizo descendants. However, they also provided opportunities for other Native communities to maintain a degree of independence and identity at and beyond the margins of the European-dominated world.