Дисертації з теми "HEAVY METAL LONS"
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Brodd, Patrick. "Long term heavy metal contamination from leakage water sediments." Thesis, Uppsala University, Department of Earth Sciences, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-88909.
Повний текст джерелаNestle, Nikolaus, Martin Ebert, Arthur Wunderlich, and Thomas Baumann. "Long-term observation of adsorbed heavy metal ions in sediment samples by MRI." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-194323.
Повний текст джерелаNestle, Nikolaus, Martin Ebert, Arthur Wunderlich, and Thomas Baumann. "Long-term observation of adsorbed heavy metal ions in sediment samples by MRI." Diffusion fundamentals 5 (2007) 7, S. 1-19, 2007. https://ul.qucosa.de/id/qucosa%3A14271.
Повний текст джерелаГринцова, Наталія Борисівна, Наталия Борисовна Гринцова, Nataliia Borysivna Hryntsova, O. Timakova, Оксана Костянтинівна Романюк, Оксана Константиновна Романюк, Oksana Kostiantynivna Romaniuk, et al. "Adaptive alterations of pinealocytes after the long-term influence of heavy metal salts on the body." Thesis, Springer, 2020. https://essuir.sumdu.edu.ua/handle/123456789/81349.
Повний текст джерелаDeng, Hong. "Metal (Pb, Zn, Cu, Cd, Fe) uptake, tolerance and radial oxygen loss in typical wetland plants." HKBU Institutional Repository, 2005. http://repository.hkbu.edu.hk/etd_ra/629.
Повний текст джерелаSyrovetnik, Kristina. "Long-term metal retention processes in a peat bog : Field studies, data and modelling." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-460.
Повний текст джерелаSharma, Kuhuk. "Assessment of heavy metal contamination and restoration of soil food web structural complexity in urban vacant lots in two post-industrial cities." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406232323.
Повний текст джерелаWu, Chuan. "Effects of radial oxygen loss (ROL) on arsenic tolerance, uptake and distribution by rice (Oryza sativa L.)." HKBU Institutional Repository, 2011. http://repository.hkbu.edu.hk/etd_ra/1246.
Повний текст джерелаBourgeois, Jason. "Assessment of surface and ground waters, stream and estuary sediments and other ecosystem receptors to determine long term impacts of surface PCB and heavy metal releases, Makinsons, Newfoundland /." Internet access available to MUN users only, 1997. http://collections.mun.ca/u?/theses,36164.
Повний текст джерелаWilliams, Wesley S. "Method development for long-term monitoring of heavy metals in mussel shells by laser-ablation inductively-coupled-plasma mass-spectrometry." Thesis, The University of Tulsa, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3622730.
Повний текст джерелаHeavy metal pollution is a growing concern as growing worldwide population and industrial processes increase pollution levels in most environments. High metal concentrations throughout ecosystems pose a serious threat to wild-life and human health. Methods to monitor rising threat levels of metals are a primary concern for monitoring overall ecosystem health. Mechanisms which spread pollution must be intimately understood because of the persistence of heavy metals. Heavy metal contamination in the Tar Creek superfund site provides a great case study to selectively observe differences in heavy metals concentrations both upstream and downstream of mining activity. Thus, research is able to identify natural and man-made point sources of pollution.
The abilities of bivalves to filter-feed and sediment-feed provide a unique monitoring tool for analyzing heavy metals. Mussels are constantly filtering the environment around them. A mussel's seasonal and annual growth layers provide an excellent sample media for obtaining historical records of environmental data. Many species of mussels are found in most freshwater ecosystems throughout the United States. Mussels have low migration rates, live for a suitable amount of time, and leave relic shells. These features make mussels very practical for monitoring heavy metal pollution.
Various studies were conducted to obtain insight into developing methods for using LA-ICP-MS as a tool for monitoring heavy metals in mussel shells. Surface laser ablations, compared at additional depths, resulted in a more than 20% increase in signal intensity. Theoretical and experimental designs show signal changes as a function of depth. Mussel tissue and shell digestions were found to be best when using approximately 1.0 mL of hydrogen peroxide and 1.0 mL of nitric acid for each 0.1 grams of sample. Mussel tissue was found to have greater heavy metal concentrations than shells. Shells were found to average a 96% weight of calcium carbonate; however, the organic layers contained the greatest concentrations of heavy metals per weight.
Hartwell, S. Ian. "Validation of laboratory versus field avoidance behavior of schooling fathead minnows to heavy metal blends relative to acute toxicity during long term exposure." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/54751.
Повний текст джерелаPh. D.
Madaffari, Maria Grazia. "New mixtures to be used in permeable reactive barrier for heavy-metals contaminated groundwater remediation : long-term removal efficiency and hydraulic behavior." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2015. http://www.theses.fr/2015ECAP0025/document.
Повний текст джерелаGroundwater remediation is currently one of the major environmental challenges, considering the number of contaminated sites and the risk posed to human health and to the environment by exposure to groundwater contamination. Permeable reactive barrier (PRB) is a passive in situ technology for the remediation of contaminated groundwater. It consists of a barrier placed perpendicularly to the contaminant flow and made of reactive material that treats contaminant plume flowing through it under the natural hydraulic gradient. It is the most cost-effective groundwater remediation technology; it allows the use of surface land and reduces the exposure of workers to contaminants. The most used reactive material is Zero Valent Iron (ZVI), which is able to remediate groundwater contaminated by a large range of contaminants by means of different chemical and physical mechanisms. The main issue of granular ZVI use regards the reduction of the porous medium porosity, because of the expansive nature of corrosion products, precipitates and gas formation. To overcome this problem, mixtures of ZVI and granular materials were tested to investigate their long-term removal efficiency and hydraulic behavior. The use of volcanic Lapillus to be mixed with ZVI to remediate heavy-metals contaminated groundwater is proposed in this work. Tests on Lapillus showed a not negligible heavy metal removal efficiency of the volcanic material, while the hydraulic monitoring of column tests performed using mixtures showed a not high reduction of hydraulic conductivity over time.Modelling batch and column tests as a tool for understanding the mechanisms involved in the reactive porous media has been set up. The analysis of the sensitivity of the models response with respect to the input parameters has also been explored
Castaneda-Jimenez, Angelica. "Background concentrations of heavy metals and their role in clean up of hazardous waste sites application to Ventura and Los Angeles counties /." Diss., Restricted to subscribing institutions, 2005. http://proquest.umi.com/pqdweb?did=954047921&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
Повний текст джерелаSchweitzer, Na'ama. "Greening the Streets: A Comparison of Sustainable Stormwater Management in Portland, Oregon and Los Angeles, California." Scholarship @ Claremont, 2013. http://scholarship.claremont.edu/pomona_theses/85.
Повний текст джерелаВасиленко, О. І. "Гістоморфологічні особливості реакції довгих кісток скелета в умовах споживання солей важких металів". Thesis, Видавництво СумДУ, 2012. http://essuir.sumdu.edu.ua/handle/123456789/26870.
Повний текст джерелаBoer, Emilia den. "A novel approach for integrating heavy metals emissions from landfills into life cycle assessment : Consideration of waste pretreatment, landfill processes and long-term effects /." Darmstadt : Inst. WAR, 2007. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=015958544&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Повний текст джерелаBourgeois, Jason Francis. "Assessment of surface and ground waters, stream and estuary sediments and other ecosystem receptors to determine long term impacts of surface PCB and heavy metal releases, Makinsons, Newfoundland." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq25824.pdf.
Повний текст джерелаAsthana, Abhishek. "Modélisation mathématique de la formation des NOx et de la volatilisation des métaux lourds lors de l'incinération sur grille d'ordures ménagères." Thesis, Vandoeuvre-les-Nancy, INPL, 2008. http://www.theses.fr/2008INPL018N/document.
Повний текст джерелаAs a tool for controlling the Municipal Solid Waste (MSW) incineration process and its possible pollutant emissions, a mathematical model of the MSW bed burning on travelling grate of an incinerator was developed. The model describes most of the physico-chemical and thermal phenomena taking place in incineration like the drying and pyrolysis of the feed, combustion and gasification of char, oxidation of pyrolysis gases, heat transfer, bed shrinking, feed stirring, etc. Also described in the model are the mechanisms of Heavy Metals (HM) volatilization and NOx formation. Kinetics of HM release was modelled using the approach of additive reaction times accounting for the various transport mechanisms involved: external transfer, intra-particle diffusion and actual volatilization. In the case simulated, i.e. of Cd, almost total volatilization is predicted, which is confirmed by literature findings. The NOx sub-model takes into account most of the common mechanisms of formation like thermal, prompt, fuel, N2O intermediate and also NOx reduction by homogeneous reburning and heterogeneous reduction by char. Calculations show that NOx formation is predominated by the fuel mechanism and destruction by the heterogeneous reduction. Finally, the bed model was applied to study the influence of various operating parameters like flow rate, temperature and distribution of air under grates, waste particle size, feed stirring and the stirring scheme. The results are presented and discussed in detail and the influence of operating conditions on process efficiency and on emissions of Cd and NOx is analyzed
Hodul, Jakub. "Vývoj speciálních sanačních hmot na beton pro extrémní namáhání s využitím druhotných surovin." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-401596.
Повний текст джерелаCHAUHAN, DEEPTI. "SYNTHESIS AND APPLICATIONS OF POLYMERIC HYDROGELS AS HEAVY METAL LONS AND OTHER INDUSTRIALLY IMPORTANT METAL ION SENSOR." Thesis, 2022. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19612.
Повний текст джерелаHuang, Wang-Chi, and 黃婉綺. "Long-term Leaching Behaviors of Heavy Metals from Hazardous Waste Incinerator Bottom Ash." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/41498815626468797110.
Повний текст джерела國立高雄應用科技大學
化學工程與材料工程系碩士在職專班
101
This study investigated different grain size of hazardous waste incineration bottom ash on the understanding of heavy-metal distribution characterization and long-term environmental friendliness by using total amount of heavy metal and multiple toxicity characteristic leaching procedure (MTCLP) test. It will be useful to EPA’s management strategy for recovery restriction of incineration ash. Also, different grain size of hazardous waste incineration bottom ash all include high concentrations of copper and zinc. Especially, heavy-metal content is mainly distributed in the particle size of 4.76 mm or more. Although heavy-metal distribution characterization is difference between the TCLP test and the total analysis, however, the leaching heavy-metal concentrations of TCLP test are much lower than the control standards. Moreover, the result of MTCLP test indicated that all hazardous waste incineration bottom ashes do have long-term environmental friendliness. The results found that hazardous waste incinerator bottom ash is high water absorption and copper metal content exceeds soil control standards. Therefore, the addition of hazardous waste incineration bottom ash used as an aggreagate should be further confirmed the additive ratio of recovery product.
Hwang, Sing Ping, and 黃世平. "Study on The Affection of Physical and Chemical Propesties of Solidified Heavy Metal Containing Sludges with Simulated Long Term Durability Tests." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/35601419506967066371.
Повний текст джерела國立屏東技術學院
環境工程技術研究所
84
Three electroplating sludges were selected in this study to proceed cement solidification/stabilization procedure . Toxicity characteristic leaching procedure (TCLP) and unconfined compressive strength were used to indentify the change of chemical and physical properties . According the initial result , several most adequate solidification ratios were decided to proceed durability tests . Three durability tests ( ASTM D4843-88 wetting and drying test (WDT) , ASTM D4842-90 freezing and thawing test (FTT) and durability test which designed for this study (DT) ) were selected in this study . The results could be showed in two aspects . In the physical aspect , all of the solidified samples could not be destroyed when proceeded WDT . However , some of the solidified samples were deteriorated when proceeded FTT and DT . Because some of the solidified samples were destroyed that caused their unconfined compressive strength coming down . In the chemical aspect , heavy metals in the solidified samples which were treated with WDT and FTT could not be leached higher by using multiple toxicity characteristic leaching procedure (MTCLP) . But heavy metals in the solidified samples which were treated with DT could be leached higher by using multiple toxicity characteristic leaching procedure .