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Fractionation Release And Adsorption Of Heavy Metals In Contaminated Marine Sediments
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Book Synopsis Fractionation, Release and Adsorption of Heavy Metals in Contaminated Marine Sediments by : 馬依琪
Download or read book Fractionation, Release and Adsorption of Heavy Metals in Contaminated Marine Sediments written by 馬依琪 and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Fractionation, Release and Adsorption of Heavy Metals in Contaminated Marine Sediments" by 馬依琪, Yee-ki, Ma, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3122768 Subjects: Contaminated sediments - China - Hong Kong Heavy metals - Environmental aspects - China - Hong Kong
Book Synopsis Fractionation, Release and Adsorption of Heavy Metals in Contaminated Marine Sediments by :
Download or read book Fractionation, Release and Adsorption of Heavy Metals in Contaminated Marine Sediments written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Metal Contaminated Aquatic Sediments by : HerbertE. Allen
Download or read book Metal Contaminated Aquatic Sediments written by HerbertE. Allen and published by Routledge. This book was released on 2018-04-27 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade the sediments of many rivers, lakes, and estuaries have been contaminated by inorganic and organic materials. Contaminants from sediments, under certain conditions, can be released into overlying waters. Thus, sediments may be an important source of contaminants to waters in which littoral and atmospheric contaminants have been reduced or eliminated. Often found in aquatic sediments, metals are exposed to many reactions, such as sorption and precipitation, and are greatly influenced by the redox conditions in the sediment. The reactions - usually over a period of time - reflect biotic processing as well as chemical transformations. This book describes these important processes. Metal Contaminated Aquatic Sediments outlines advances in environmental chemistry, effective new modeling techniques, applications for biological treatment, and cycling and transport of trace metals in sedimentary environments. Each chapter contains a detailed reference section that draws upon a stunning array of sources. The book includes many figures and tables that illustrate the process under discussion. Features
Book Synopsis Chemical Speciation and Heavy Metal Mobility in Contaminated Marine Sediments by : Alexandra Katsiri
Download or read book Chemical Speciation and Heavy Metal Mobility in Contaminated Marine Sediments written by Alexandra Katsiri and published by . This book was released on 2009 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Management of sediments from coastal areas, contaminated with heavy metals and organic substances, is a very critical issue. Management decisions are usually based on total pollutant concentrations and various guidelines that are used by different countries. Heavy metals can be mobilized from polluted sediments if they are exposed to changing environmental conditions that occur during excavation, disposal at sea, or disposal in confined facilities. This paper examines the changes in heavy metals partitioning to binding phases in contaminated marine sediments and the release of metals to the environment. Environmental conditions are simulated by submitting sediments to a modified elutriation test with oxygenated and deoxygenated seawater. A sequential extraction procedure is used to determine the binding fractions of heavy metals in the sediments. Fractionation analysis of excavated marine sediments from the port of Piraeus, Greece showed that copper is primarily associated with organic matter, whereas lead and zinc are primarily associated with iron oxides. Under anoxic conditions, the metals bound to the various binding fractions remain practically stable. On the other hand, under oxic conditions, an increase in the concentration of metals associated with carbonates and a decrease in the concentration of metals associated with organic matter and iron oxides were observed. Both under oxic and anoxic conditions, actual metal mobility was very low and less than 0.5 % of total metal mass was found in the dissolved phase.
Book Synopsis Dredging, Remediation, and Containment of Contaminated Sediments by : K. R. Demars
Download or read book Dredging, Remediation, and Containment of Contaminated Sediments written by K. R. Demars and published by ASTM International. This book was released on 1995 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the June 1994 title symposium held in Montreal, Quebec, Canada, and sponsored by the ASTM Committee on Soil and Rock. Papers identify and describe tests, methods, procedures, and materials used in support of dredging, treatment, and containment of contaminated sediments, and focus on
Book Synopsis Sediments Contamination and Sustainable Remediation by : Catherine N. Mulligan
Download or read book Sediments Contamination and Sustainable Remediation written by Catherine N. Mulligan and published by CRC Press. This book was released on 2009-12-16 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although valuable resources in river basins and other aqueous environments, sediments often receive much less attention from researchers, policymakers, and other professionals than other components of the ecosystem. Until now. Highlighting the important role that sediments play in the geoenvironment, Sediments Contamination and Sustainable Remediat
Book Synopsis Chemistry of Marine Sediments by : Teh Fu Yen
Download or read book Chemistry of Marine Sediments written by Teh Fu Yen and published by . This book was released on 1977 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Release and Migration of Activation Products from Corrosion-resistant Metal Specimens in Marine Sediments by : F. L. Sayles
Download or read book The Release and Migration of Activation Products from Corrosion-resistant Metal Specimens in Marine Sediments written by F. L. Sayles and published by . This book was released on 1986 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the release of Ni-63, Co-60, and Fe-55 from Inconel 600 and 347SS stainless steel specimens implanted in marine sediment for one year is described. Radiochemical analysis of the sediment from overcores of the metal specimens permits estimation of integrated activities, release rates, and diffusion coefficients of the three radionuclides. Disturbance of the sediment upon recovery limits the values to order of magnitude estimates. The redox chemistry of the sediments is characterized by measurement of several naturally occurring oxidizing agents and is correlated with the behavior of the radionuclides. Details of the deployment, sampling and analytical procedures are also given.
Book Synopsis Traces of Heavy Metals in Water Removal Processes and Monitoring by : J. Eleanora Sabadell
Download or read book Traces of Heavy Metals in Water Removal Processes and Monitoring written by J. Eleanora Sabadell and published by . This book was released on 1974 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bioavailability of Contaminants in Soils and Sediments by : National Research Council
Download or read book Bioavailability of Contaminants in Soils and Sediments written by National Research Council and published by National Academies Press. This book was released on 2003-05-03 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioavailability refers to the extent to which humans and ecological receptors are exposed to contaminants in soil or sediment. The concept of bioavailability has recently piqued the interest of the hazardous waste industry as an important consideration in deciding how much waste to clean up. The rationale is that if contaminants in soil and sediment are not bioavailable, then more contaminant mass can be left in place without creating additional risk. A new NRC report notes that the potential for the consideration of bioavailability to influence decision-making is greatest where certain chemical, environmental, and regulatory factors align. The current use of bioavailability in risk assessment and hazardous waste cleanup regulations is demystified, and acceptable tools and models for bioavailability assessment are discussed and ranked according to seven criteria. Finally, the intimate link between bioavailability and bioremediation is explored. The report concludes with suggestions for moving bioavailability forward in the regulatory arena for both soil and sediment cleanup.
Book Synopsis Mobilisation of Sedimentary Trace Metals Following Improved Oxygen Conditions by :
Download or read book Mobilisation of Sedimentary Trace Metals Following Improved Oxygen Conditions written by and published by Nordic Council of Ministers. This book was released on 1999 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Division on Engineering and Physical Sciences Publisher :National Academies Press ISBN 13 :0309054931 Total Pages :318 pages Book Rating :4.3/5 (9 download)
Book Synopsis Contaminated Sediments in Ports and Waterways by : Division on Engineering and Physical Sciences
Download or read book Contaminated Sediments in Ports and Waterways written by Division on Engineering and Physical Sciences and published by National Academies Press. This book was released on 1997-04-20 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contaminated marine sediments threaten ecosystems, marine resources, and human health. They can have major economic impacts when controversies over risks and costs of sediment management interfere with needs to dredge major ports. Contaminated Sediments in Ports and Waterways examines management and technology issues and provides guidance that will help officials make timely decisions and use technologies effectively. The book includes recommendations with a view toward improving decision making, developing cost-effective technologies, and promoting the successful completion of cleanup projects. The volume assesses the state of practice and research and development status of both short-term and longer-term remediation methods. The committee provides a conceptual overview for risk-based contaminated sediment management that can be used to develop plans that address complex technological, political, and legal issues and the interests of various stakeholders. The book emphasizes the need for proper assessment of conditions at sediment sites and adequate control of contamination sources.
Book Synopsis Fractionation, Mobilization and Bioaccumulation of Heavy Metals and Mineralogical Characteristics of the Mai Po Inner Deep Bay Mudflat by : Mei-Yee Lai
Download or read book Fractionation, Mobilization and Bioaccumulation of Heavy Metals and Mineralogical Characteristics of the Mai Po Inner Deep Bay Mudflat written by Mei-Yee Lai and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Fractionation, Mobilization and Bioaccumulation of Heavy Metals and Mineralogical Characteristics of the Mai Po Inner Deep Bay Mudflat" by Mei-yee, Lai, 黎美兒, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled FRACTIONATION, MOBILIZATION AND BIOACCUMULATION OF HEAVY METALS AND MINERALOGICAL CHARACTERISTICS OF THE MAI PO INNER DEEP BAY MUDFLAT Submitted by LAI MEI YEE for the degree of Master of Philosophy at The University of Hong Kong in March 2004 Mai Po Inner Deep Bay (2229' to 2231'N and 11359' to 11403'E), an important global habitat in the Northwest New Territories of Hong Kong supporting a variety of flora and fauna, presently faces an unprecedented threat and pressure from pollutions generated both within Hong Kong and in the adjacent part of the Guangdong Province. The objectives of this study were to investigate the fractionation, mobilization and bioaccumulation of selected heavy metals (Zn, Cu, Cr, Pb, Ni and Cd) found in the Mai Po Inner Deep Bay mudflat, and to analyze its mineralogical characteristics. Mineralogical analysis revealed that quartz (74.45-83.53%), clay minerals (12.98-23.73%), in the form of the mixture of kaolinite (40.49-60.87%), illite (24.22-29.24%) and non-swelling chlorite (9.89-25.33%), and K-feldspar (1.51-5.50%) were the major mineralogical constituents in the mudflat sediment of the Mai Po Inner Deep Bay. Understanding the fractionation pattern of heavy metals in sediments is essential in an environmental assessment of heavy metals contamination. Results of a fractionation analysis in this study showed a marked concentration of heavy metals (approximately 250 g/g Zn, 88 g/g Cu, 88 g/g Cr, 78 g/g Pb, 47 g/g Ni and 0.7 g/g Cd by ICP-MS) in the mudflat sediment of the Mai Po Inner Deep Bay, mainly sequestered in both exchangeable and oxidizable fractions (>56%). The high heavy metal content in these geochemical fractions, especially the exchangeable fraction, implies that large amounts of the total heavy metals in the mudflat sediment are bioavailable, with potential hazard and ecotoxicity to the ambient biota, particularly in the benthic infauna. Generally, heavy metals in sediments are not retained permanently. In the present study, the effects of different concentrations of MgCl, CaCl and NaCl on heavy metal 2 2 remobilization (i.e. cation exchange dynamics) were also assessed. With the exception of Zn, all heavy metals (including Cu, Pb and Cr) tended towards a high heavy metal remobilization, making them more bioavailable when the applied concentrations of MgCl, CaCl and NaCl were increased or MgCl and CaCl were used. 2 2 2 2 Bioaccumulation of heavy metals in biota, particularly in the small-sized benthic infauna, was also investigated in this study. Measurements revealed a marked concentration of heavy metals in the bodies of the most dominating microgastropod species: Sermyla riqueti (approximately 32 g/g Zn, 14 g/g Cu, 14 g/g Pb and 3 g/g Cr) and Stenothyra devalis (approximately 124 g/g Cu, 51 g/g Zn, 17 g/g Pb and 7 g/g Cr). The high heavy metal contents in both exchangeable and oxidizable fractions with relatively high metal bioavailability may be the primary reason for the serious heavy metal bioaccumulation in these microgastropod species. This whole study suggests that a unique mineralogical environment at the Mai Po Inner Deep Bay mudflat is ecotoxic, resulting in a high heavy metal bioavailability and bioaccumulation in the benthic infauna. DOI
Book Synopsis Environmental Risk Assessment of Soil Contamination by : Maria C. Hernandez Soriano
Download or read book Environmental Risk Assessment of Soil Contamination written by Maria C. Hernandez Soriano and published by BoD – Books on Demand. This book was released on 2014-03-26 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil is an irreplaceable resource that sustains life on the planet, challenged by food and energy demands of an increasing population. Therefore, soil contamination constitutes a critical issue to be addressed if we are to secure the life quality of present and future generations. Integrated efforts from researchers and policy makers are required to develop sound risk assessment procedures, remediation strategies and sustainable soil management policies. Environmental Risk Assessment of Soil Contamination provides a wide depiction of current research in soil contamination and risk assessment, encompassing reviews and case studies on soil pollution by heavy metals and organic pollutants. The book introduces several innovative approaches for soil remediation and risk assessment, including advances in phytoremediation and implementation of metabolomics in soil sciences.
Book Synopsis U.S. Geological Survey Circular by :
Download or read book U.S. Geological Survey Circular written by and published by . This book was released on 1984 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Settling on the Adsorption of Heavy Metals on Fine-Grained Sediments in Sea Water by :
Download or read book Effect of Settling on the Adsorption of Heavy Metals on Fine-Grained Sediments in Sea Water written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Contaminated Sediments by : Ulrich Förstner
Download or read book Contaminated Sediments written by Ulrich Förstner and published by Springer. This book was released on 2006-04-10 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sediments are increasingly recognized as both a carrier and a possible source of contaminants in aquatic systems, and they may also affect groundwater quality and agricultural products when disposed on land. Four aspects are covered reflecting the development of knowledge in particle-associated pollutants during the past twenty-five years: - the identification, surveillance, monitoring and control of sources and distribution of pollutants, - the evaluation of solid/solution relations of contaminants in surface waters, - the study of in-situ processes and mechanisms of pollutant transfer in various compartments of the aquatic ecosystems, - the assessment of the environmental impact of particle-bound contaminants, i.e. the development of sediment quality criteria. A final chapter focusses on practical aspects concerning contaminated sediments.
