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Author : Lynley Susan Roberts
Publisher :
ISBN 13 :
Total Pages : 274 pages
Book Rating : 4.:/5 (227 download)
Download or read book Adsorption of Phosphate and Arsenic on Sediments in Lake Ohakuri written by Lynley Susan Roberts and published by . This book was released on 1984 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Satinder Ahuja
Publisher : John Wiley & Sons
ISBN 13 : 0470369264
Total Pages : 420 pages
Book Rating : 4.4/5 (73 download)
Download or read book Arsenic Contamination of Groundwater written by Satinder Ahuja and published by John Wiley & Sons. This book was released on 2008-10-03 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a viable reference, describing the state-of-knowledge on sources of arsenic contamination in ground water, which affects about 100 million people worldwide. With contributions from world-renowned experts in the field, this book explores developments in the transport kinetics, detection, measurement, seasonal cycling, accumulation, geochemistry, removal, and toxicology of arsenic. Includes compelling case studies describing how arsenic contamination occurs and the devastating effects on the people and environment affected by it.
Author :
Publisher :
ISBN 13 :
Total Pages : 294 pages
Book Rating : 4.:/5 (319 download)
Download or read book U.S. Geological Survey Professional Paper written by and published by . This book was released on 1984 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Shiou Kuo
Publisher :
ISBN 13 :
Total Pages : 226 pages
Book Rating : 4.:/5 (517 download)
Download or read book Phosphate Adsorption by Some Clay Minerals and Lake Sediments written by Shiou Kuo and published by . This book was released on 1973 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James S. Kuwabara
Publisher : Geological Survey (USGS)
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.3/5 (126 download)
Download or read book Toxic Substances in Surface Waters and Sediments written by James S. Kuwabara and published by Geological Survey (USGS). This book was released on 2003 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Section I. Effects of benthic flora on arsenic transport in Whitewood Creek, South Dakota / by James S. Kuwabara, Cecily C.Y. Chang, and Sofie P. Pasilis -- Section II. Evaluation of the processes controlling dissolved arsenic in Whitewood Creek, South Dakota / by Christopher C. Fuller and James A. Davis.
Author : Yau-Fei Chan
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
Download or read book The Sorption of Arsenic Species to Moira Lake Sediments written by Yau-Fei Chan and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adorption and desorption experiments were used to study the effects of chloride and phosphate on the mobility of arsenic with respect to Moira Lake sediments. Salinities ranging from 0-1500 mg/L chloride and ionic strengths ranging from 0-0.04M were used in a series of sorption experiments. Results from the sorption experiments indicate that the magnitude and direction of the effect of NaCl on the sorption of arsenate, arsenite, dimethylarsinic acid (DMAA) and monomethylarsonic acid (MMAA) is attributed to Cl- and not Na+ or ionic strength. In general, chloride reduced the sorption of arsenic on Moira Lake sediments. Arsenate and arsenite sorption was independent of ionic strength indicating the formation of inner-sphere complexes. MMAA sorption was dependent on ionic strength indicating that MMAA reacts with mineral oxides by forming outer-sphere complexes. The overall sorption order on Moira Lake sediments was arsenate > arsenite > MMAA > DMAA. Salinities ranging from 0-1500 mg/L chloride and phosphate concentrations ranging from 10-50 [mu]g/L were used in desorption experiments. Phosphate significantly enhanced the desorption of arsenic from Moira Lake sediments. Approximate phosphate: arsenic molar ratios of 1:22, 1:45 and 1:110 were able to displace 41%, 35% and 27% of the sorbed arsenic respectively. Chloride also enhanced the mobility of arsenic from Moira Lake sediments but to a lesser extent than phosphate.
Author : Wen-Chi Ku
Publisher :
ISBN 13 :
Total Pages : 191 pages
Book Rating : 4.:/5 (223 download)
Download or read book Equilibrium Adsorption of Inorganic Phosphate by Lake Sediments written by Wen-Chi Ku and published by . This book was released on 1975 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dima Zaghtiti
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (11 download)
Download or read book Adsorption of Phosphorus on Sediments from Lake Caron and Huron River written by Dima Zaghtiti and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sediments play an important role in the overall equilibrium conditions in eutrophic surface water, which is determined by the nutrient concentration mainly Phosphorus (P). Sorption tests were performed for sediments from Lake Caron and Huron River. By taking the originally sorbed P (S 0) into consideration, the experimental data were fit to the modified Langmuir and Freundlich isotherms. The modified Langmuir isotherm was used to obtain the maximum sorption capacity (S max) as its values varied between 100 to 5000 mg-P/kg. Sediments might act as a source or sink of P. The equilibrium concentration at zero sorption (EPC 0) between the water column and sediments was calculated, for the sediments from Lake Caron showed a wide range from 0.043-0.31 mgP/L, and the sediments might act as potential source of Pinto the water, except for CS3 which might act as a sink. For the Huron River EPC 0 values are in the range of 0.15-0.18 mg-P/L. The adsorption kinetics were studied and modeled as the power function, and the half life time of P by the sediments was determined. Soluble reactive phosphorus (SRP) concentration changes in the water by resuspension was observed over a period of 4 days. More analysis for SRP changes was performed, to included the effect of sediments to solution ratio, resuspension and the background electrolyte. The effect of particle size fraction on the sorption models for CS3 was evaluated and S max was 5800 mg-P/kg for a particle size less than 38?m and 910 mg-P/kg for the particle size of 75?m -2mm, which indicates the smaller the particles size the more the ability to adsorb P.
Author : T. Gossa
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (637 download)
Download or read book Adsorption and Desorption of Phosphate on Sediments of Lake Hollands Ankeveen written by T. Gossa and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Carol A. Lake
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.:/5 (31 download)
Download or read book Phosphate and Tripolyphosphate Adsorption by Clay Minerals and Estuarine Sediments written by Carol A. Lake and published by . This book was released on 1977 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 936 pages
Book Rating : 4.E/5 ( download)
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1986 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jack C. Ng
Publisher : CRC Press
ISBN 13 : 0415637635
Total Pages : 616 pages
Book Rating : 4.4/5 (156 download)
Download or read book Understanding the Geological and Medical Interface of Arsenic - As 2012 written by Jack C. Ng and published by CRC Press. This book was released on 2012-07-06 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: The congress "Arsenic in the Environment" offers an international, multi- and interdisciplinary discussion platform for arsenic research aimed at practical solutions of problems with considerable social impact, as well as focusing on cutting edge and breakthrough research in physical, chemical, toxicological, medical and other specific issues on arsenic on a broader environmental realm. The congress "Arsenic in the Environment" was first organized in Mexico City (As 2006) followed by As 2008 in Valencia, Spain and As 2010 in Tainan, Taiwan. The 4th International Congress As 2012 was held in Cairns, Australia from July 22-27, 2012 entitled Understanding the Geological and Medical Interface of Arsenic. The session topics comprised: 1. Geology and hydrogeology of arsenic; 2. Medical and health issues of arsenic; 3. Remediation and policy; 4. Analytical methods for arsenic; and 5. Special topics on "Risk assessment of arsenic from mining", "Geomicrobiology of arsenic", "Geothermal arsenic", "Rice arsenic and health perspectives", "Sustainable mitigation of arsenic: from field trials to policy implications", and "Biogeochemical processes of high arsenic groundwater in inland basins" Hosting this congress in Australia was welcome and valued by the local scientific communities. Australia is a mineral rich country where mining has generated significant economic benefit to its people. Unfortunately historical mining for base metals, gold and arsenic had led to environmental contamination of arsenic. Locally produced arsenical compounds were widely used as pesticides and in timber preservation. It is known that there are several thousands of cattle- and sheep-dip sites contaminated with arsenic in Australia. However, commonly observed symptoms of chronic arsenic poisonings such as those found in endemic-blackfoot areas are seemingly absent from these types of environmental contamination due to good quality of potable water supply. Does this fall in the classic argument of "the dose makes the poison"? This congress theme of "understanding the geological and medical interface of arsenic" will advance our knowledge in minimising the risk posted by this so-called number one prioritised contaminant – arsenic.
Author : Joseph V. DePinto
Publisher : CRC Press
ISBN 13 : 9780873718875
Total Pages : 372 pages
Book Rating : 4.7/5 (188 download)
Download or read book Transport and Transformation of Contaminants Near the Sediment-Water Interface written by Joseph V. DePinto and published by CRC Press. This book was released on 1993-10-13 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transport and Transformation of Contaminants Near the Sediment-Water Interface addresses the issue of contaminated bottom sediments and their potential adverse impacts on water quality. This state-of-the-science book covers regulatory management perspectives, physical processes, chemical and biological processes, and process synthesis/modeling. Specific topics discussed include EPA's Sediment Quality Criteria program from a regulatory perspective; flocculation, deposition, and resuspension of fine-grained sediments; approaches for measuring vertical sediment flux near the sediment-water interface; equilibrium models for metal speciation in natural sediments; the partitioning of organic chemicals in bottom sediments; and the development and application of models of sediment and associated contaminant transport in surface waters. The significance of recent studies suggesting that interaction of contaminated bottom sediments with the overlying water play an important role in the long-term recovery of aquatic systems makes Transport and Transformation of Contaminants Near the Sediment-Water Interface essential for water quality engineers, environmental chemists, and environmental toxicologists. The volume provides important information for consultants, regulators, researchers, and graduate students as well.
Author : A. Gomez-Caminero
Publisher : Environmental Health Criteria
ISBN 13 :
Total Pages : 558 pages
Book Rating : 4.:/5 (319 download)
Download or read book Arsenic and Arsenic Compounds written by A. Gomez-Caminero and published by Environmental Health Criteria. This book was released on 2001 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book evaluates the risks to human health and the environment posed by arsenic and arsenic compounds. Arsenic is widely distri-buted in the earth's crust and is emitted into the atmosphere by coal-fired power generation plants and volcanic activity. Inorganic arsenic of geological origin is found in groundwater used as drinking-water in several parts of the world, e.g., Bangladesh. In these areas, drinking-water is the main source of arsenic intake, but elsewhere food is the principal source.
Author : B. J. Alloway
Publisher : Springer Science & Business Media
ISBN 13 : 9780751401981
Total Pages : 392 pages
Book Rating : 4.4/5 (19 download)
Download or read book Heavy Metals in Soils written by B. J. Alloway and published by Springer Science & Business Media. This book was released on 1995 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heavy metals in soils continue to receive increasing attention due to the growing scientific and public awareness of environmental issues and the development of analytical techniques to measure their concentrations accurately. Building on the success and acclaim of the first edition, this book continues to provide an up-to-date, balanced and comprehensive review of the subject in two sections: the first providing an introduction to the metals chemistry, sources and methods used for their analysis; and the second containing chapters dealing with individual elements in detail.
Author : J. D. H. Williams
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Adsorption and Desorption of Inorganic Phosphorus by Lake Sediments in a 0.1 M NaCl System written by J. D. H. Williams and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Glennys Anne O'Brien
Publisher :
ISBN 13 :
Total Pages : 514 pages
Book Rating : 4.:/5 (227 download)
Download or read book Observations on the Mobility of Arsenic in the Sediments in Lake Ohakuri written by Glennys Anne O'Brien and published by . This book was released on 1983 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
