Journal articles: 'Mine residues'

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Zhou, Huaijin, Ryan Schulze, Sandra Cox, Cristian Saez, Zonglin Hu, and Joe Lutkenhaus. "Analysis of MinD Mutations Reveals Residues Required for MinE Stimulation of the MinD ATPase and Residues Required for MinC Interaction." Journal of Bacteriology 187, no. 2 (January 15, 2005): 629–38. http://dx.doi.org/10.1128/jb.187.2.629-638.2005.

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ABSTRACT The MinD ATPase is critical to the oscillation of the Min proteins, which limits formation of the Z ring to midcell. In the presence of ATP, MinD binds to the membrane and recruits MinC, forming a complex that can destabilize the cytokinetic Z ring. MinE, which is also recruited to the membrane by MinD, displaces MinC and stimulates the MinD ATPase, resulting in the oscillation of the Min proteins. In this study we have investigated the role of lysine 11, present in the deviant Walker A motif of MinD, and the three residues in helix 7 (E146, S148, and D152) that interact electrostatically with lysine 11. Lysine 11 is required for interaction of MinD with the membrane, MinC, MinE, and itself. In contrast, the three residues in helix 7 that interact with lysine 11 are not required for binding to the membrane or activation of MinC. They are also not required for MinE binding; however, they are required for MinE to stimulate the MinD ATPase. Interestingly, the D152A mutant self-interacts, binds to the membrane, and recruits MinC and MinE in the presence of ADP as well as ATP. This mutant provides evidence that dimerization of MinD is sufficient for MinD to bind the membrane and recruit its partners.

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Zhou, Huaijin, and Joe Lutkenhaus. "Membrane Binding by MinD Involves Insertion of Hydrophobic Residues within the C-Terminal Amphipathic Helix into the Bilayer." Journal of Bacteriology 185, no. 15 (August 1, 2003): 4326–35. http://dx.doi.org/10.1128/jb.185.15.4326-4335.2003.

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ABSTRACT MinD binds to phospholipid vesicles in the presence of ATP and is released by MinE, which stimulates the MinD ATPase. Membrane binding requires a short conserved C-terminal region, which has the potential to form an amphipathic helix. This finding has led to a model in which the binding of ATP regulates the formation or accessibility of this helix, which then embeds in the membrane bilayer. To test this model, we replaced each of the four hydrophobic residues within this potential helix with tryptophan or a charged residue. Introduction of a negatively charged amino acid decreased membrane binding of MinD and its ability to activate MinC. In contrast, mutants with tryptophan substitutions retained the ability to bind to the membrane and activate MinC. Fluorescence emission spectroscopy analysis of the tryptophan mutants F263W, L264W, and L267W confirmed that these tryptophan residues did insert into the hydrophobic interior of the bilayer. We conclude that membrane binding by MinD involves penetration of the hydrophobic residues within the C-terminal amphipathic helix into the hydrophobic interior of the bilayer.

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Shim, Choon Hee, Woo Keun Lee, and Hyo Jon Ban. "Preparation of Adsorbent from Mine Residues." Materials Science Forum 544-545 (May 2007): 597–600. http://dx.doi.org/10.4028/www.scientific.net/msf.544-545.597.

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The object of this study is to prepare adsorbents to remove heavy metals from abandoned mine residues. There are many factors that affect the adsorptivity of prepared adsorbents. The adsorptivity of prepared adsorbents is evaluated by cation exchange capatity(CEC). The maxium CEC value is obtained by Dongwon mine residues treated with NaOH. The optimum condition at that time is 75/25 wt% of mixing ratio of Dongwon mine residues and NaOH under N2 atmosphere at the activation temperature of 500°C. The CEC value was 95meq/100g at this condition. 99.5% of Pb was removed under the condition of 50 mg/L, pH 5 and reaction time of 1hr.

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Cai, Mengli, Ying Huang, Yang Shen, Min Li, Michiyo Mizuuchi, Rodolfo Ghirlando, Kiyoshi Mizuuchi, and G. Marius Clore. "Probing transient excited states of the bacterial cell division regulator MinE by relaxation dispersion NMR spectroscopy." Proceedings of the National Academy of Sciences 116, no. 51 (November 26, 2019): 25446–55. http://dx.doi.org/10.1073/pnas.1915948116.

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Bacterial MinD and MinE form a standing oscillatory wave which positions the cell division inhibitor MinC, that binds MinD, everywhere on the membrane except at the midpoint of the cell, ensuring midcell positioning of the cytokinetic septum. During this process MinE undergoes fold switching as it interacts with different partners. We explore the exchange dynamics between major and excited states of the MinE dimer in 3 forms using15N relaxation dispersion NMR: the full-length protein (6-stranded β-sheet sandwiched between 4 helices) representing the resting state; a 10-residue N-terminal deletion (Δ10) mimicking the membrane-binding competent state where the N-terminal helix is detached to interact with membrane; and N-terminal deletions of either 30 (Δ30) or 10 residues with an I24N mutation (Δ10/I24N), in which the β1-strands at the dimer interface are extruded and available to bind MinD, leaving behind a 4-stranded β-sheet. Full-length MinE samples 2 “excited” states: The first is similar to a full-length/Δ10 heterodimer; the second, also sampled by Δ10, is either similar to or well along the pathway toward the 4-stranded β-sheet form. Both Δ30 and Δ10/I24N sample 2 excited species: The first may involve destabilization of the β3- and β3′-strands at the dimer interface; changes in the second are more extensive, involving further disruption of secondary structure, possibly representing an ensemble of states on the pathway toward restoration of the resting state. The quantitative information on MinE conformational dynamics involving these excited states is crucial for understanding the oscillation pattern self-organization by MinD–MinE interaction dynamics on the membrane.

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Chen, Yanrong, Haojie Li, Zhongqing Yang, and Hu Fan. "Co-utilization of two coal mine residues." Advances in Mechanical Engineering 7, no. 9 (September 11, 2015): 168781401560638. http://dx.doi.org/10.1177/1687814015606380.

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Szeto, Jason, Sudeep Acharya, Nelson F. Eng, and Jo-Anne R. Dillon. "The N Terminus of MinD Contains Determinants Which Affect Its Dynamic Localization and Enzymatic Activity." Journal of Bacteriology 186, no. 21 (November 1, 2004): 7175–85. http://dx.doi.org/10.1128/jb.186.21.7175-7185.2004.

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ABSTRACT MinD is involved in regulating the proper placement of the cytokinetic machinery in some bacteria, including Neisseria gonorrhoeae and Escherichia coli. Stimulation of the ATPase activity of MinD by MinE has been proposed to induce dynamic, pole-to-pole oscillations of MinD in E. coli. Here, we investigated the effects of deleting or mutating conserved residues within the N terminus of N. gonorrhoeae MinD (MinDNg) on protein dynamism, localization, and interactions with MinDNg and with MinENg. Deletions or mutations were generated in the first five residues of MinDNg, and mutant proteins were evaluated by several functional assays. Truncation or mutation of N-terminal residues disrupted MinDNg interactions with itself and with MinE. Although the majority of green fluorescent protein (GFP)-MinDNg mutants could still oscillate from pole to pole in E. coli, the GFP-MinDNg oscillation cycles were significantly faster and were accompanied by increased cytoplasmic localization. Interestingly, in vitro ATPase assays indicated that MinDNg proteins lacking the first three residues or with an I5E substitution possessed higher MinENg-independent ATPase activities than the wild-type protein. These results indicate that determinants found within the extreme N terminus of MinDNg are implicated in regulating the enzymatic activity and dynamic localization of the protein.

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Chen, Yi, Haifeng Dou, Qiaoying Chang, and Chunlin Fan. "PRIAS: An Intelligent Analysis System for Pesticide Residue Detection Data and Its Application in Food Safety Supervision." Foods 11, no. 6 (March 8, 2022): 780. http://dx.doi.org/10.3390/foods11060780.

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Pesticide residue is a prominent factor that leads to food safety problems. For this reason, many countries sample and detect pesticide residues in food every year, which generates a large amount of pesticide residue data. However, the way to deeply analyze and mine these data to quickly identify food safety risks is still an unresolved issue. In this study, we present an intelligent analysis system that supports the collection, processing, and analysis of detection data of pesticide residues. The system is first based on a number of databases such as maximum residue limit standards for the fusion of pesticide residue detection results; then, it applies a series of statistical methods to analyze pesticide residue data from multiple dimensions for quickly identifying potential risks; it uses the Apriori algorithm to mine the implicit association in the data to form pre-warning rules; finally, it applies Word document automatic generation technology to automatically generate pesticide residue analysis and pre-warning reports. The system was applied to analyze the pesticide residue detection results of 42 cities in mainland China from 2012 to 2015. Application results show that the system proposed in this study can greatly improve the depth, accuracy and efficiency of pesticide residue detection data analysis, and it can provide better decision support for food safety supervision.

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Kray, Claudio Henrique, Marino José Tedesco, Carlos Alberto Bissani, Clesio Gianello, and Kelly Justin da Silva. "Tannery and coal mining waste disposal on soil." Revista Brasileira de Ciência do Solo 32, spe (December 2008): 2877–82. http://dx.doi.org/10.1590/s0100-06832008000700035.

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Tannery residues and coal mine waste are heavily polluting sources in Brazil, mainly in the Southern States of Rio Grande do Sul and Santa Catarina. In order to study the effects of residues of chrome leather tanning (sludge and leather shavings) and coal waste on soybean and maize crops, a field experiment is in progress since 1996, at the Federal University of Rio Grande do Sul Experimental Station, county of Eldorado do Sul, Brazil. The residues were applied twice (growing seasons 1996/97 and 1999/00). The amounts of tannery residues were applied according to their neutralizing value, at rates of up to 86.8 t ha-1, supplying from 671 to 1.342 kg ha-1 Cr(III); coal waste was applied at a total rate of 164 t ha-1. Crop yield and dry matter production were evaluated, as well as the nutrients (N, P, K, Ca, Mg, Cu and Zn) and Cr contents. Crop yields with tannery sludge application were similar to those obtained with N and lime supplied with mineral amendments. Plant Cr absorption did not increase significantly with the residue application. Tannery sludge can be used also to neutralize the high acidity developed in the soil by coal mine waste.

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Rutherford, P. M., and J. M. Arocena. "Organic Amendments and Earthworm Addition Improve Properties of Nonacidic Mine Tailings." Applied and Environmental Soil Science 2012 (2012): 1–11. http://dx.doi.org/10.1155/2012/395964.

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In many mined areas, lack of topsoil limits conversion of disturbed landscapes to former or other productive uses. We examined the use of biosolids (10 or 20% by dry mass), with or without sawdust, pulp sludge, and the contribution of an earthworm species (Dendrobaena veneta) to improve the properties of nonacidic mine tailings. Pulp sludge more rapidly immobilized excessiveNH4 +concentrations from biosolids early in the study; however, total mineral N concentrations were similar in pulp sludge and sawdust treatments by week 29. AlthoughNO3 −-N concentrations were generally greater in treatments with earthworms, these trends were not statistically significant (P>0.05). In general, Bray P concentrations were greater in the presence of earthworms. Soil thin sections showed that earthworms mixed organic residues into elongated spherical units within mine tailings. Organic residues in combination with earthworm addition may improve the chemical and microstructural properties of non-acidic mine tailings, producing a substrate conducive for plant establishment.

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Schmotz, Walter, and Annika Peters. "Contaminated site, abandoned mine, landfill Morgenstern." at - Automatisierungstechnik 70, no. 10 (October 1, 2022): 919–31. http://dx.doi.org/10.1515/auto-2022-0070.

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Abstract The contaminated site “Morgenstern” in the German federal state Lower Saxony is an example of a complex case of remediation. The measures illustrated in this article are carried out in a conventional manner but represent a potential scope of application for robotic systems. Objective is the removal of a deposition of soil contaminated with drum residuals and chemical waste at the edge of an open pit within an abandoned iron ore mine. The slope angle of the area of operation is 45 degrees. Gas emissions from the depository above as well as organic substance residues in the contaminated layer below lead to a toxic and explosive atmosphere. In addition, the site’s critical structural integrity poses further risks so that manual operations presuppose maximum occupational health and safety measures.

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Herbert, Roger B., Linda Höckert, Mattias von Brömssen, Helen Friis, and Gunnar Jacks. "Mine Waste Stabilization with Biosludge and Ca Carbonate Residues: Column Experiments." Advanced Materials Research 20-21 (July 2007): 291–94. http://dx.doi.org/10.4028/www.scientific.net/amr.20-21.291.

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Column experiments investigated the stabilization of waste rock from Ljusnarsberg mine in Kopparberg, Sweden. In order to inhibit the generation of acidic leachate from the waste rock, biosludge and a Ca carbonate – rich residue from the paper industry were mixed with the sulfidic mine waste. The results of the column experiments indicate that the stabilization of the waste rock with the reactive amendments succeeded in maintaining a near – neutral pH in the waste rock leachate, compared to a pH 3 leachate from untreated waste rock. Copper and Zn concentrations in leachate from the untreated waste exceeded 100 mg/L, while these metals were detected at concentrations less than 0.1 and 1 mg/L, respectively, in the leachate from the treated wastes. This study indicates that the stabilization of acid – generating waste rock with biosludge and Ca carbonate residues is effective in preventing the generation of acid mine drainage; the treatment is expected to continue until the reactive amendments are exhausted.

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12

Scotti, Adalgisa, Stefano Milia, Vanesa Silvani, Giovanna Cappai, Daniela Guglietta, Francesca Trapasso, Emanuela Tempesta, et al. "Sustainable Recovery of Secondary and Critical Raw Materials from Classified Mining Residues Using Mycorrhizal-Assisted Phytoextraction." Metals 11, no. 8 (July 22, 2021): 1163. http://dx.doi.org/10.3390/met11081163.

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In this work, mycorrhizal-assisted phytoextraction (MAP, Helianthus annuus–arbuscular mycorrhizal fungus Rhizophagus intraradices–Zn-volcanic ashes) was applied for the recovery of secondary and critical raw materials (SRMs and CRMs, respectively) from Joda West (Odisha, India) mine residues, within a novel multidisciplinary management strategy. Mine residues were preliminarily characterized by using advanced analytical techniques, and subsequently mapped, classified and selected using multispectral satellite Sentinel-2A images and cluster analysis. Selected mine residues were treated by MAP at laboratory scale, and the fate of several SRMs (e.g., Zn, Cr, As, Ni, Cu, Ca, Al, K, S, Rb, Fe, Mn) and CRMs (such as Ga, Ti, P, Ba and Sr) was investigated. Bioconcentration factors in shoots (BCS) and roots (BCR) and translocation factors (TF) were: 5.34(P) > BCS > 0.00(Al); 15.0(S) > BCR > 0.038(Ba); 9.28(Rb) > TF > 0.02(Ti). Results were used to predict MAP performance at larger scale, simulating a Vegetable Depuration Module (VDM) containing mine residues (1 m3). Estimated bio-extracting potential (BP) was in the range 2417 g/m3 (K) > BP> 0.14 g/m3 (As), suggesting the eventual subsequent recovery of SRMs and CRMs by hydrometallurgical techniques, with final purification by selective electrodeposition, as a viable and cost-effective option. The results are promising for MAP application at larger scale, within a circular economy-based approach.

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Mangmang, Mechelle, and Katherine Cozo. "Growth Response of Abaca (Musa textilis Nee) in Abandoned Mine Soil Amended with Oil Palm Residues." Southeastern Philippines Journal of Research and Development 26, no. 2 (September 30, 2021): 23–46. http://dx.doi.org/10.53899/spjrd.v26i2.158.

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The mining industry is one of the leading sectors providing economic benefit to the community. However, mining minerals inevitably affect the ecosystem function of the land, thereby reducing ecological services provided to mankind. Soil remediation is done to restore ecological integrity while mitigating degradation processes. Thus, this study was conducted to determine the chemical properties of abandoned mine soil and to determine the effects of oil palm residues on the growth performance of abaca (Hybrid 7) grown in mined soil under nursery conditions. This study was arranged in a completely randomized design (CRD) with five treatments and four replications, namely, T1 - Mined Soil Alone, T2 - Garden Soil Alone, T3 - Mined soil + Oil Palm Sludge, T4 - Mined Soil + Oil Palm Empty Fruit Bunch (EFB) Biochar, T5 – Mined Soil + Oil Palm Vermicast. Chemical analysis of mined soil revealed extreme acidic soil condition, low organic matter, CEC, N, K, and high P content relative to soil nutrient sufficiency criteria. Mined soil contained 0.347 mg/kg Cd and 0.230 mg/kg Pb which are within the tolerable limit of 2.00 mg/ kg for Cd and 300 mg/kg (Pb), respectively. Application of oil palm residues in mined soil can significantly improve the morphology and dry matter yield performance of hybrid 7 abaca seedlings. Plants grown in mined soil amended with oil palm residues were taller, larger pseudostem girth with more and bigger functional leaves, and had a higher survival rate compared to those grown in soil derived from the abandoned mining area. Abaca plants grown with amendments had accumulated higher dry matter. Oil palm residues particularly vermicast has greater potential as soil amendment under degraded mined in Mawab, Davao de Oro.

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Kaur, Gurkiran, Sara J. Couperthwaite, and Graeme J. Millar. "Performance of bauxite refinery residues for treating acid mine drainage." Journal of Water Process Engineering 26 (December 2018): 28–37. http://dx.doi.org/10.1016/j.jwpe.2018.09.005.

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Butler, Sara, James Pope, Subba Chaganti, Daniel Heath, and Christopher Weisener. "Biogeochemical Characterization of Metal Behavior from Novel Mussel Shell Bioreactor Sludge Residues." Geosciences 9, no. 1 (January 18, 2019): 50. http://dx.doi.org/10.3390/geosciences9010050.

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Acid mine drainage (AMD) remediation commonly produces byproducts which must be stored or utilized to reduce the risk of further contamination. A mussel shell bioreactor has been implemented at a coal mine in New Zealand, which is an effective remediation option, although an accumulated sludge layer decreased efficiency which was then removed and requires storage. To understand associated risks related to storage or use of the AMD sludge material, a laboratory mesocosm study investigated the physio-chemical and biological influence in two conditions: anoxic storage (burial deep within a waste rock dump) or exposure to oxic environments (use of sludge on the surface of the mine). Solid phase characterization by Scanning Electron Microscopy (SEM) and selective extraction was completed to compare two environmental conditions (oxic and anoxic) under biologically active and abiotic systems (achieved by gamma irradiation). Changes in microbial community structure were monitored using 16s rDNA amplification and next-generation sequencing. The results indicate that microbes in an oxic environment increase the formation of oxyhydroxides and acidic conditions increase metal mobility. In an oxic and circumneutral environment, the AMD sludge may be repurposed to act as an oxygen barrier for mine tailings or soil amendment. Anoxic conditions would likely promote the biomineralization of sulfide minerals in the AMD sludge by sulfate reducing bacteria (SRB), which were abundant in the system. The anoxic conditions reduced the risk of trace metals (Zn) associated with oxides, but increased Fe associated with organic material. In summary, fewer risks are associated with anoxic burial but repurposing in an oxic condition may be appropriate under favorable conditions.

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Jones, J. R., A. G. Kim, and T. E. Ackman. "THE USE OF COAL COMBUSTION RESIDUES TO CONTROL ACID MINE DRAINAGE." Journal American Society of Mining and Reclamation 1997, no. 1 (1997): 496–502. http://dx.doi.org/10.21000/jasmr97010496.

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Sgarlata, Caterina, Alessandra Formia, Cristina Siligardi, Francesco Ferrari, and Cristina Leonelli. "Mine Clay Washing Residues as a Source for Alkali-Activated Binders." Materials 15, no. 1 (December 23, 2021): 83. http://dx.doi.org/10.3390/ma15010083.

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The aim of this paper is to promote the use of mine clay washing residues for the preparation of alkali activated materials (AAMs). In particular, the influence of the calcination temperature of the clayey by-product on the geopolymerization process was investigated in terms of chemical stability and durability in water. The halloysitic clay, a mining by-product, has been used after calcination and mixed with an alkaline solution to form alkali activated binders. Attention was focused on the influence of the clay’s calcination treatment (450–500–600 °C) on the geopolymers’ microstructure of samples, remaining in the lower limit indicated by the literature for kaolinite or illite calcination. The mixtures of clay and alkali activators (NaOH 8M and Na-silicate) were cured at room temperature for 28 days. The influence of solid to liquid ratio in the mix formulation was also tested in terms of chemical stability measuring the pH and the ionic conductivity of the eluate after 24-h immersion time in water. The results reported values of ionic conductivity higher for samples made with untreated clay or with low temperature of calcination (≥756 mS/m) compared with values of samples made with calcined clay (292 mS/m). This result suggests that without a proper calcination of the as-received clay it was not possible to obtain 25 °C-consolidated AAMs with good chemical stability and dense microstructure. The measures of integrity test, pH, and ionic conductivity in water confirmed that the best sample is made with calcined clay at 600 °C, being similar (53% higher ionic conductivity of the eluate) or equal (integrity test and pH) to values recorded for the metakaolin-based geopolymer considered the reference material. These results were reflected in term of reticulation and morphology of samples through the analysis with scanning electron microscope (SEM) and X-ray diffraction (XRD), which show a dense and homogeneous microstructure predominantly amorphous with minor amounts of quartz, halloysite, and illite crystalline phases. Special attention was dedicated to this by-product to promote its use, given that kaolinite (and metakaolin), as primary mineral product, has a strong impact on the environment. The results obtained led us to consider this halloysite clay very interesting as an aluminosilicate precursor, and extensively deepening its properties and reactivity for the alkaline activation. In fact, the heart of this work is to study the possibility of reusing this by-product of an industrial process to obtain more sustainable high-performance binders.

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Salazar, Miguel, [Agrave]ngela Bosch-Serra, Germán Estudillos, and Rosa Maria Poch. "Rehabilitation of Semi-Arid Coal Mine Spoil Bank Soils with Mine Residues and Farm Organic By-Products." Arid Land Research and Management 23, no. 4 (October 9, 2009): 327–41. http://dx.doi.org/10.1080/15324980903231934.

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Ren, Jun, Chuanjin Xie, Jian-Ying Lin, and Zhong Li. "Co-utilization of two coal mine residues: Non-catalytic deoxygenation of coal mine methane over coal gangue." Process Safety and Environmental Protection 92, no. 6 (November 2014): 896–902. http://dx.doi.org/10.1016/j.psep.2013.10.002.

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Cabral, Alexandre, Isabelle Racine, Fabien Burnotte, and Guy Lefebvre. "Diffusion of oxygen through a pulp and paper residue barrier." Canadian Geotechnical Journal 37, no. 1 (February 1, 2000): 201–17. http://dx.doi.org/10.1139/t99-093.

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Acid mine drainage can be curbed or reduced significantly by covering tailings sites with an oxygen barrier. In this study, the ability of pulp and paper residues, more specifically deinking residues, to function as such a barrier was investigated. Field data from two sites show that O2 diffusion through the barriers can be greatly reduced. To better understand how oxygen migrates through deinking residues and to develop prediction tools for future design with deinking residues, one-dimensional effective diffusion coefficients (De) were determined by fitting laboratory experimental curves (O2 concentration versus time data) to curves obtained from computer simulations. The results obtained confirmed the behaviour observed in soil covers: the effective diffusion coefficients are highly dependent on the degree of saturation (Sr) of the compacted material. The De values obtained in this study compare well with those published in the literature for several materials compacted at similar Sr. The De values varied from 8.3 × 10-9 m2/s (Sr approximately 91%) to 9.7 × 10-7 m2/s (Sr approximately 76%). The O2 consumption by biodegradation appears to be an important factor in the reduction of the O2 flux that can reach the bottom of the barrier.Key words: oxygen diffusion, pulp and paper residues, barrier, acid mine drainage.

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Carvalho, Luísa C., Erika S. Santos, Jorge A. Saraiva, M. Clara F. Magalhães, Felipe Macías, and Maria Manuela Abreu. "The Potential of Cistus salviifolius L. to Phytostabilize Gossan Mine Wastes Amended with Ash and Organic Residues." Plants 11, no. 5 (February 22, 2022): 588. http://dx.doi.org/10.3390/plants11050588.

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The São Domingos mine is within the Iberian Pyrite Belt, a mining district with large concentrations of polymetallic massive sulfide deposits. Mine waste heaps are considered extreme environments, since they contain high total concentrations of potentially hazardous elements (PHE), which contribute to inhibiting the development of most plants. Autochthonous plant species, such as Cistus salviifolius L., are able to grow naturally in this degraded environment, and may contribute to minimizing the negative chemical impacts and improving the landscape quality. However, the environmental rehabilitation processes associated with the development of these plants (phytostabilization) are very slow, so the use of materials/wastes to improve some physicochemical properties of the matrix is necessary in order to speed up the process. This work studied the effectiveness of the phytostabilization with C. salviifolius of gossan mine wastes from the mine of São Domingos amended with organic and inorganic wastes in order to construct Technosols. The mine wastes have an acid pH (≈3.5), high total concentrations of PHE and low concentrations of organic C and available nutrients. The best vegetative development occurred without visible signs of toxicity in the Technosols containing a mixture of agriculture residues. These treatments allowed the improvement of the soil-plant system providing a better plant cover and improved several chemical properties of mine wastes, helping to speed up the environmental rehabilitation.

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Kabombo, Dieudonné, Dariush Azizi, Réjean Hébert, and Faïçal Larachi. "Multistep concentration of lizardite/antigorite from chrysotile mine tailings – case of the Carey Mine site in East-Broughton (Québec)." International Journal of Chemical Reactor Engineering 19, no. 5 (March 25, 2021): 483–98. http://dx.doi.org/10.1515/ijcre-2020-0242.

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Abstract Revalorization of mining residues is of central concerns to the mining industry and the environment. Specifically, environmental management of residual products from the exploitation of chrysotile in the Thetford Mines region is one of the government concerns in Quebec and Canada. This work uses mining wastes in a second resource generation for production of magnesium from cheap and health-friendly mineral sources; the goal being to produce chrysotile-depleted pre-concentrates for a use as precursors in the leach off extraction of magnesium. The concentration of lizardite/antigorite from chrysotile containing serpentine rock mine tailings originating from the Carey Mine site in East-Broughton (Québec) was carried out using a suite of hydrocyclone, settling/decantation and magnetic separations. Four size classes of the mining residue, namely (−3150,+1580), (−1580, +600), (−600, +300) and (−300, +150) μm, were tested with an aim to reduce the level of objectionable asbestos fibers to allow access to the safer Mg-bearing minerals contained in the mine waste sources. The asbestos fibers clean-up consisted of subjecting the sieved fractions to two hydrocyclone steps, six settling/decantation steps and two magnetic separation steps. The best results were achieved when the hydrocyclone separators led to Mg recovery of 85% (±4) for the coarsest size fraction size. Both hydrocyclone underflow streams underwent settling/decantation separations. The settling tests lasted 30 min and led to Mg recoveries of 82.5% (±1.8) of Mg in the ultimate concentrate. SEM characterizations revealed that it was possible to reduce substantially the amount of chrysotile fibers to render the coarse-sized fraction in the mining waste usable while significantly lowering the health risk of the fibers. A two-step magnetic separation was applied to the final settling/decantation underflow to remove magnetic minerals such as magnetite from the lizardite/antigorite concentrate. The final quasi-non-magnetic chrysotile-depleted lizardite/antigorite concentrate allowed sample recovery of 62.5% (±0.9) wt. of Mg. These preliminary results are intended as a first compulsory step in support of viable restoration and sustainable development scenarios for the Thetford Mines mining sites as second-breath sources for valuable magnesium.

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Visser, Suzanne. "Redevelopment of biological activity in stripmine spoils: saprotrophic fungi – abstract." Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences 94 (1988): 85. http://dx.doi.org/10.1017/s0269727000007156.

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The impact of severe soil disturbance on soil fungal community composition and function and how this relates to the resultant decomposition/mineralisation process is very poorly understood. Consequently, research was conducted to determine: (a) to what degree fungal community structure and potential function are altered in a sub-alpine coal mine spoil (Luscar, Alberta), and (b) how do alterations in the fungal community affect patterns of fungal colonisation and decomposition of plant residues deposited on recently mined soil.

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Segui, Pauline, Amine el Mahdi Safhi, Mustapha Amrani, and Mostafa Benzaazoua. "Mining Wastes as Road Construction Material: A Review." Minerals 13, no. 1 (January 6, 2023): 90. http://dx.doi.org/10.3390/min13010090.

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The mining industry manages large volumes of tailings, sludge, and residues that represent a huge environmental issue. This fact has prompted research into valorization of these wastes as alternative aggregates for concrete production, embankments, pavement material, etc. The use of mining wastes as a resource for construction presents two benefits: conserving natural resources and reducing the environmental impacts of mining. In the case of road construction, the use of mining wastes has not yet been developed on a large scale and there is a major lack of specific legislation. This gap is due to the variety of exploited rocks, the diversity of tailings, mine residues, or valuable by-products slated for valorization, and the environmental specifics. This paper presents a review on recycling mine wastes as road construction material, including waste rock and mine tailings. Those materials were mostly used in infrastructure where soils had initially poor geotechnical properties (low bearing capacity, frost susceptibility, swelling risk, etc.). Different mining wastes were used directly or stabilized by a hydraulic binder through geopolymerization or, in some cases, with bituminous treatment. Overall, the use of mine wastes for road construction will have a considerable environmental impact by reducing the volume of waste and offering sustainable raw materials.

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Gandarillas, Mónica, Helena España, Rosario Gardeweg, Fernando Bas, Eduardo C. Arellano, Sally Brown, and Rosanna Ginocchio. "Integrated Management of Pig Residues and Copper Mine Tailings for Aided Phytostabilization." Journal of Environmental Quality 48, no. 2 (March 2019): 430–38. http://dx.doi.org/10.2134/jeq2017.11.0431.

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Wichlacz, Paul L., and Richard F. Unz. "Mineralogical characteristics of residues produced in microbiological treatment of acidic mine drainages." Geomicrobiology Journal 4, no. 4 (January 1986): 407–22. http://dx.doi.org/10.1080/01490458609385946.

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Dominy, Simon C., Hylke J. Glass, and Richard C. A. Minnitt. "Sampling Broken Ore Residues in Underground Gold Workings: Implications for Reconciliation and Lost Revenue." Minerals 12, no. 6 (May 25, 2022): 667. http://dx.doi.org/10.3390/min12060667.

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The underground mining process typically results in some of the metal inventory remaining as a broken residue within mine workings. Up to 0.5 m of broken ore may be left on the floors of development drives and in stopes. It is possible that this broken ore contains 5% or more of the original metal in the ore reserve, which will have a material effect on reconciliation and project economics. Broken ore remaining in the mine may have been subject to enhanced milling during the mucking process, yielding enhanced liberation of the economic minerals of interest. Given that the material in question is already broken, the sampling strategy will be based on digging trenches or pits into the mine floor to extract a pre-determined mass of material for assay. The sampling of stope floors will most likely be based on grab sampling. Application of the theory of sampling is a key aspect of ensuring that evaluation is effective. Gy’s equation for the fundamental sampling error can be used to determine an optimum sample mass, and to inform subsequent steps in preparation for assaying at given confidence limits and precision. This paper presents a discussion and case study.

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Kordylewski, Włodzimierz K., Krzysztof J. Mościcki, and Karol J. Witkowski. "Lab-Scale Investigations During Combustion of Agricultural Residues and Selected Polish Coals." Chemical and Process Engineering 35, no. 2 (June 1, 2014): 249–62. http://dx.doi.org/10.2478/cpe-2014-0019.

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Abstract Preliminary lab-scale investigations were conducted on slagging abatement in biomass-firing by fuel mixing. Three agriculture biomass fuels and olive cake were used in the experiments. Polish lignites and bituminous coals were examined as anti-sintering additives. The effects of chlorine release, potassium retention and ash sintering were examined by heating samples of biomass fuels and additives in the muffle oven and, next, firing them in the laboratory down-fired furnace at the temperature in the range of 800-1150ºC. The obtained slag samples were analysed on: chlorine and potassium content, sintering tendency and crystalline components. Among the examined coals lignite from Turów mine and bituminous coal from Bolesław Śmiały mine appeared to be the most effective in potassium retention in aluminosilicate and chlorine release from slag. Possibly the major factor of these coals which reduced ash sintering was relatively high content of kaolinite

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Kasmaeeyazdi, Sara, Emanuele Mandanici, Efthymios Balomenos, Francesco Tinti, Stefano Bonduà, and Roberto Bruno. "Mapping of Aluminum Concentration in Bauxite Mining Residues Using Sentinel-2 Imagery." Remote Sensing 13, no. 8 (April 14, 2021): 1517. http://dx.doi.org/10.3390/rs13081517.

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There is a growing interest in the characterization of mining residues, both for environmental assessments and critical raw materials recovery. The lack of sufficient in situ samples hampers an effective geostatistical modelling of material concentrations variability. This paper proposes a method to characterize the aluminum spatial variability in a mine residue from remote sensing data and imprecise information from daily dumping procedures. The method is proposed for the mapping of aluminum within a Greek bauxite residue, using Sentinel-2 imagery. The spatial correlation between metal concentrations and remote sensing indicators (e.g., spectral band ratios) is the premise for mapping aluminum varieties. The proposed method is based on Conditional Gaussian Co-Simulation, where Sentinel-2 images can be used as auxiliary variables. Simulation results are compared with the Co-kriging estimation method. To perform the Co-kriging estimation, the same conditions as simulation are used (same inputs, models, and neighborhoods). Simulation results quantified the metals variability in mining residues, presenting the metal concentration of piled materials in two time periods. For results validation and selecting the best map, fourteen validation samples were used. For the best representative maps of aluminum concentration, a correlation coefficient of about 0.7 between the validation data and obtained aluminum concentration map was obtained.

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Usman, Dudi Nasrudin, Sri Widayati, Sriyanti Sriyanti, and Era Setiawan. "Rock Formation Acid Mine Drainage in Epithermal Gold Mineralization, Pandeglang, Banten Province." Journal of Geoscience, Engineering, Environment, and Technology 4, no. 4 (December 30, 2019): 271–76. http://dx.doi.org/10.25299/jgeet.2019.4.4.3903.

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Mine acid water is acidic water and contains iron and sulfate, which is formed under natural conditions when geological strata containing pyrites are exposed to an oxidizing atmosphere or environment. One of the impacts of the mineralization zone where there is a mining process is the potential for the formation of acid mine drainage, especially in the Cibaliung gold mineralization area and its surroundings, Pandeglang Regency, Banten Province. Acid-forming sulfide minerals include pyrite (FeS2), headquarters (FeS2), picoliters (FexSx), calcocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), chalocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), chalocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), galena (PbS) ) and sphalerite (ZnS). Of all these minerals, pyrite is the most dominant sulfide in acid formation. Alkaline mine water (alkaline mine drainage) is mine water that has an acidity level (pH) of 6 or more, containing alkalinity but still containing dissolved metals that can produce acids. The quality of mine water, acid or alkali, depends on the presence or absence of acid mineral content (sulfides) and alkaline materials in the geological strata. Acid water formation tends to be more intensive in mining areas. This can be prevented by avoiding exposure to sulfide-containing materials in the free air. Acid-forming sulfide minerals include pyrite (FeS2), headquarters (FeS2), picoliters (FexSx), calcocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), chalocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), chalocytes (CuS), covellite (CuS), chalcopyrite (CuFeS2), molybdenite (MoS), mulenite (NiS), galena (PbS) ) and sphalerite (ZnS). Of all these minerals, pyrite is the most dominant sulfide in acid formation. Formation of potential acidic water also occurs in tailings which are residues/processing residues containing sulfide minerals. The formation of acid mine drainage does not always develop in every sulfide-ore mining. In certain types of ore deposits, there are neutralizing agents which prevent the formation of acid mine drainage.

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Anderson, Daniel W., Thomas H. Suchanek, Collin A. Eagles-Smith, and Thomas M. Cahill. "MERCURY RESIDUES AND PRODUCTIVITY IN OSPREY AND GREBES FROM A MINE-DOMINATED ECOSYSTEM." Ecological Applications 18, sp8 (December 2008): A227—A238. http://dx.doi.org/10.1890/06-1837.1.

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Mählitz, Løvik, Figi, Schreiner, Kuntz, Korf, Rösslein, Wäger, and Rotter. "Characterizing the Urban Mine–Challenges of Simplified Chemical Analysis of Anthropogenic Mineral Residues." Resources 8, no. 3 (July 26, 2019): 132. http://dx.doi.org/10.3390/resources8030132.

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Anthropogenic mineral residues are characterized by their material complexity and heterogeneity, which pose challenges to the chemical analysis of multiple elements. However, creating an urban mine knowledge database requires data using affordable and simple chemical analysis methods, providing accurate and valid results. In this study, we assess the applicability of simplified multi-element chemical analysis methods for two anthropogenic mineral waste matrices: (1) lithium-ion battery ash that was obtained from thermal pre-treatment and (2) rare earth elements (REE)-bearing iron-apatite ore from a Swedish tailing dam. For both samples, simplified methods comprising ‘inhouse’ wet-chemical analysis and energy-dispersive Xray fluorescence (ED-XRF) spectrometry were compared to the results of the developed matrix-specific validated methods. Simplified wet-chemical analyses showed significant differences when compared to the validated method, despite proven internal quality assurance, such as verification of sample homogeneity, precision, and accuracy. Matrix-specific problems, such as incomplete digestion and overlapping spectra due to similar spectral lines (ICP-OES) or element masses (ICP-MS), can result in quadruple overestimations or underestimation by half when compared to the reference value. ED-XRF analysis proved to be applicable as semi-quantitative analysis for elements with mass fractions higher than 1000 ppm and an atomic number between Z 12 and Z 50. For elements with low mass fractions, ED-XRF analysis performed poorly and showed deviations of up to 90 times the validated value. Concerning all the results, we conclude that the characterization of anthropogenic mineral residues is prone to matrix-specific interferences, which have to be addressed with additional quality assurance measures.

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Cánovas, Manuel, Julio Valenzuela, Leonardo Romero, and Paul González. "Characterization of electroosmotic drainage: application to mine tailings and solid residues from leaching." Journal of Materials Research and Technology 9, no. 3 (May 2020): 2960–68. http://dx.doi.org/10.1016/j.jmrt.2020.01.046.

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34

Martin, Tina, Kerstin Kuhn, Thomas Günther, and Rudolf Kniess. "Geophysical Exploration of a Historical Stamp Mill Dump for the Volume Estimation of Valuable Residues." Journal of Environmental and Engineering Geophysics 25, no. 2 (June 2020): 275–86. http://dx.doi.org/10.2113/jeeg19-080.

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We present an approach for the estimation of ore processing residue volumes in historical mine waste dumps by the use of different geophysical methods in combination with mineralogical investigations. The stamp mill dump in the Harz mountains, Germany was examined with the methods electrical resistivity tomography (ERT), ground penetrating radar (GPR) and spectral induced polarization (SIP) flanked by mineralogical studies at many drilling points. The mineralogical results were used to calibrate the geophysical results and to distinguish between valuable and non-valuable waste material. With SIP we investigated individual profiles and took lab samples. These lab results emphasize the differences between the fine-grained tailings of clayey silt to silty sand in the top layer and the sandy tailings underneath in both resistivity and phase. From the GPR results we can distinguish between different layers and various backfillings in the first two meters due to the much higher resolution than the other methods. From ERT we achieved an overview about the dimension and inner structure of the dump and the boundary between the sandy residual material and the host rock. To estimate the volume of the residual body we carried out 2D inversion of all ERT profiles followed interpolation between the inverted profiles. From the drilling interpretation, the SIP lab results and the ERT field measurements we defined a resistivity threshold of 350 ohm-m for the ore processing residues to achieve a 3-dimensional body of the dump. The volume of this body was then corrected by a factor due to consideration of uncertainties, e.g., forest areas, inaccessible dump sections, small-scale anomalies (geological or different anthropogenic nature) and inversion coverage. As a result, we were able to calculate the volume of the ore processing residues which can be used further for the determination of the economic potential (remaining metal content).

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Santibañez, Claudia, Luz María de la Fuente, Elena Bustamante, Sergio Silva, Pedro León-Lobos, and Rosanna Ginocchio. "Potential Use of Organic- and Hard-Rock Mine Wastes on Aided Phytostabilization of Large-Scale Mine Tailings under Semiarid Mediterranean Climatic Conditions: Short-Term Field Study." Applied and Environmental Soil Science 2012 (2012): 1–15. http://dx.doi.org/10.1155/2012/895817.

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The study evaluated the efficacy of organic- and hard-rock mine waste type materials on aided phytostabilization of Cu mine tailings under semiarid Mediterranean conditions in order to promote integrated waste management practices at local levels and to rehabilitate large-scale (from 300 to 3,000 ha) postoperative tailings storage facilities (TSFs). A field trial with 13 treatments was established on a TSF to test the efficacy of six waste-type locally available amendments (grape and olive residues, biosolids, goat manure, sediments from irrigation canals, and rubble from Cu-oxide lixiviation piles) during early phases of site rehabilitation. Results showed that, even though an interesting range of waste-type materials were tested, biosolids (100 t ha-1dry weight, d.w.) and grape residues (200 t ha-1d.w.), either alone or mixed, were the most suitable organic amendments when incorporated into tailings to a depth of 20 cm. Incorporation of both rubble from Cu-oxide lixiviation piles and goat manure into upper tailings also had effective results. All these treatments improved chemical and microbiological properties of tailings and lead to a significant increase in plant yield after three years from trial establishment. Longer-term evaluations are, however required to evaluate self sustainability of created systems without further incorporation of amendments.

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Wang, Jing Xin, Guo Wei He, Bin Fan, and Jian Qiang Xiao. "Research on Technology of Wastewater Treatment from Scheelite Flotation." Advanced Materials Research 645 (January 2013): 121–24. http://dx.doi.org/10.4028/www.scientific.net/amr.645.121.

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Wastewater from scheelite flotation tailings slathered a lot of sodium silicate in the flotation process, a large number of silicate minerals residues remain in the wastewater, forming suspension bodies difficult to be naturally subsided. With high concentration of suspended substance and pH of 11 or more, this kind of wastewater belongs to unmanageable mine wastewater. Research shows that, pretreating the waste water with Sulfuric acid and calcium chloride, adjusting pH to 7-8 and adding polyacrylamide on flocculating-sedimentation combined can remove suspended solids effectively, offering theoretical basis for wastewater recycling and disposing mine wastewater, which is of great importance.

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Barbu, Constantin Horia, Petronela Bianca Pavel, Cristina Maria Moise, Camelia Sand, and Mihai Radu Pop. "Neutralization of Acid Mine Drainage with Wood Ash." Revista de Chimie 68, no. 12 (January 15, 2018): 2768–70. http://dx.doi.org/10.37358/rc.17.12.5975.

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The paper presents the research activities oriented to solving two environmental issues of concern: acid mine drainage that poses a great risk to soils and water, and wood ash disposal, which can be done only under strict conditions, with high costs. After trials with synthetic acid waters, the behavior of four types of ash has been investigated. The ashes used were originated from two boilers belonging to a fiberboard manufacturer, individually and mixed according to their production process, using acid mine drainage from a copper mine. Acid mine drainage has been characterized in what concern pH, fix and mineral residues, as well as Fe, Cu, Zn and Mn content. For all ashes and their mixtures, the pH (water suspension 1:5), humidity, as well as their neutralization capacity have been determined. The obtained results have been very good, proving that wood ash has better neutralization capacity than calcium carbonate, thus enabling to pursue and extend the present research work.

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Son, Hae-Jun, and Woo-Keun Lee. "Comparision of Leaching Characteristics of Magnesium from Mine Residues by Acid Type and Concentration." Journal of Korea Society of Waste Management 33, no. 2 (March 30, 2016): 179–83. http://dx.doi.org/10.9786/kswm.2016.33.2.179.

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Cheng, Chin-Min, Maria Amaya, Tarunjit Butalia, Robert Baker, Harold W. Walker, John Massey-Norton, and William Wolfe. "Short-term influence of coal mine reclamation using coal combustion residues on groundwater quality." Science of The Total Environment 571 (November 2016): 834–54. http://dx.doi.org/10.1016/j.scitotenv.2016.07.061.

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Wilden, R., W. Schaaf, and R. F. Hüttl. "Element budgets of two afforested mine sites after application of fertilizer and organic residues." Ecological Engineering 17, no. 2-3 (July 2001): 253–73. http://dx.doi.org/10.1016/s0925-8574(00)00143-9.

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Jouini, Marouen, Carmen Mihaela Neculita, Thomas Genty, and Mostafa Benzaazoua. "Environmental behavior of metal-rich residues from the passive treatment of acid mine drainage." Science of The Total Environment 712 (April 2020): 136541. http://dx.doi.org/10.1016/j.scitotenv.2020.136541.

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42

Haffert, Laura, and Dave Craw. "Mineralogical controls on environmental mobility of arsenic from historic mine processing residues, New Zealand." Applied Geochemistry 23, no. 6 (June 2008): 1467–83. http://dx.doi.org/10.1016/j.apgeochem.2007.12.030.

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Le Bourre, Bryce, Carmen M. Neculita, Lucie Coudert, and Eric Rosa. "Manganese removal processes and geochemical behavior in residues from passive treatment of mine drainage." Chemosphere 259 (November 2020): 127424. http://dx.doi.org/10.1016/j.chemosphere.2020.127424.

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Malloch, Kirstine R., and Dave Craw. "Comparison of contrasting gold mine processing residues in a temperate rain forest, New Zealand." Applied Geochemistry 84 (September 2017): 61–75. http://dx.doi.org/10.1016/j.apgeochem.2017.05.027.

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Pallarés, Javier, Carlos Herce, Carmen Bartolomé, and Begoña Peña. "Investigation on co-firing of coal mine waste residues in pulverized coal combustion systems." Energy 140 (December 2017): 58–68. http://dx.doi.org/10.1016/j.energy.2017.07.174.

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Maurais, Josée, Frédéric Orban, Emrik Dauphinais, and Patrick Ayotte. "Monitoring moisture content and evaporation kinetics from mine slurries through albedo measurements to help predict and prevent dust emissions." Royal Society Open Science 8, no. 7 (July 2021): 210414. http://dx.doi.org/10.1098/rsos.210414.

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The prediction and prevention of fugitive dust emissions from mine tailings surfaces depend largely on our ability to monitor and monitor and predict the evolution of tailings moisture content (TMC). Albedo measurements are demonstrated here to be valuable tools to quantify TMC in bauxite residue samples under controlled conditions in the laboratory. The difference in albedo between 1.30 and 1.55 µm obtained through the infrared integrating sphere method shows good correlations with those acquired with a field spectroradiometer while both are strongly correlated with TMC. Additionally, continuous spectroscopic characterization of evaporating residues is shown to reveal the evolution in their surface drying rates. These optical methods could help predict surface drying state, thereby improving the accuracy of dust emissions risk assessment protocols that support mining industries intervention and mitigation strategies.

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Dosic, Aleksandar, Dragana Tomasevic-Pilipovic, Miladin Gligoric, Bozo Dalmacija, Djurdja Kerkez, Natasa Slijepcevic, Jelena Spasojevic, and Zoran Obrenovic. "Green remediation of tailings from the mine using inorganic agents." Chemical Industry 71, no. 2 (2017): 155–65. http://dx.doi.org/10.2298/hemind160419026d.

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Increasing amounts of residues and waste materials coming from industrial activities in different processes have become an increasingly urgent problem for the future. The paper presents the problem of mine tailings generated in mine ?Sase? (Republic of Srpska, Bosnia and Herzegovina) with high metal content (Pb, Cu and Zn). Dumpsite of this tailing represents potential risk for water bodies in the vicinity of this location. Chosen treatment process was stabilization/solidification (S/S). Inorganic agents used in this study were fly ash and red mud that represent secondary industrial waste generated on locations relatively near the mine. Therefore, their application can be used as an example of a sustainable solution of regional environmental problem. Further investigations are related to the impact of various factors on metals leaching from mine tailings solidified/stabilized material using the above mentioned immobilization agents. The performance of the immobilizing procedures was examined using several leaching tests: ANS 16.1, TCLP, DIN, MWLP. The results indicated that all S/S samples can be considered as non-hazardous waste, as all leached metal concentrations met the set criteria. These results will further enable the modelling of metals behaviour during long-term leaching from treated mine tailing. The data are invaluable in terms of economically and environmentally sound management of mine tailing.

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Doherty, Tim S., Briana N. Wingfield, Vicki L. Stokes, Michael D. Craig, Jessica G. H. Lee, Hugh C. Finn, and Michael C. Calver. "Successional changes in feeding activity by threatened cockatoos in revegetated mine sites." Wildlife Research 43, no. 2 (2016): 93. http://dx.doi.org/10.1071/wr15053.

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Context Provision of key habitat resources is essential for effectively managing species that have specific ecological requirements and occur in production landscapes. Threatened black cockatoos in the jarrah (Eucalyptus marginata) forest of Western Australia have a wide range, so their conservation requires support from all land tenures, not just reserves. Mining in the jarrah forest temporarily removes cockatoo feeding habitat, so it is important to understand how cockatoos exploit revegetated areas for food resources. Aims We aimed to determine whether there were successional patterns in cockatoo feeding activity in revegetation aged from 4 to 23 years at three mine sites in the jarrah forest in south-western Australia. Methods We surveyed 232 plots in revegetation to document (1) structural and floristic variation in vegetation across mine sites and revegetation ages, (2) differences in cockatoo feeding activity across mine sites and revegetation ages on the basis of feeding residues and (3) any edge effect reflecting preferential use of vegetation at the interior or exterior of mine pits. We also documented the frequency of occurrence of cockatoo food plants and feeding residues in 480 plots in unmined forest to compare with revegetated areas. Key results Marri (Corymbia calophylla) and jarrah were commonly consumed in unmined forest and Banksia and Hakea species were also fed on to a lesser extent. Revegetated mine pits provided food within 4 years and continued to do so up until the oldest plots studied (23 years). The relative importance of food plants shifted from proteaceous species in young revegetation to myrtaceous species in intermediate to older revegetation. However, extent of feeding on myrtaceous species in older revegetation did not equate to feeding rates in unmined forest, with lower frequencies recorded in revegetation. Conclusions Black cockatoos fed in revegetation at all three mine sites, despite variations in vegetation age, structure and floristics. Feeding on proteaceous and myrtaceous food plants occurred within 4 and 7 years of revegetation being established, respectively, indicating that some food resources are restored quickly after mining disturbance of the jarrah forest. Implications Our results emphasise the importance of monitoring fauna recolonisation over appropriate time scales, to understand how successional processes in revegetation influence fauna population persistence in production landscapes.

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Doye, Isabelle, and Josée Duchesne. "Neutralisation of acid mine drainage with alkaline industrial residues: laboratory investigation using batch-leaching tests." Applied Geochemistry 18, no. 8 (August 2003): 1197–213. http://dx.doi.org/10.1016/s0883-2927(02)00246-9.

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Jouini, Marouen, Carmen Mihaela Neculita, Thomas Genty, and Mostafa Benzaazoua. "Freezing/thawing effects on geochemical behavior of residues from acid mine drainage passive treatment systems." Journal of Water Process Engineering 33 (February 2020): 101087. http://dx.doi.org/10.1016/j.jwpe.2019.101087.

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Journal articles on the topic 'Mine residues'

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