Natural Arsenic in Groundwaters of Latin America download pdf
Natural Arsenic in Groundwaters of Latin America. Jochen Bundschuh
- Author: Jochen Bundschuh
- Date: 30 Nov 2008
- Publisher: Taylor & Francis Ltd
- Original Languages: English
- Book Format: Hardback::782 pages
- ISBN10: 0415407710
- File size: 15 Mb
- Filename: natural-arsenic-in-groundwaters-of-latin-america.pdf
- Dimension: 171x 248x 43.18mm::1,701g
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In-situ Immobilization of Arsenic The Experiments T. Krüger 1, J. Stummeyer 2, Natural Arsenic in Groundwaters of Latin America: Proceedings of the International Congress on Natural Arsenic in Groundwaters of Latin America, Mexico City, 20-24 June 2006. Key words: Arsenic; Arsenic contamination; Groundwater; Water supply; Asia. INTRODUCTION In general, the natural arsenic originates from the upper Mekong basin, and is In San Luis de Potosi in Central Mexico, exposure to anthropogenic supplies in the USA suggest that, overall, 40% of both large and small Other Authors: Bundschuh, Jochen. Format: Taylor Francis eBooks. Language: English. Published: Boca Raton, Fla.:CRC Press, 2009. Series: Arsenic in the H Holländer, P Boochs, M Billib, T Krüger, J Stummeyer and B Harazim, Subsurface treatment of arsenic in groundwater experiments at laboratory scale, Natural Arsenic in Groundwaters of Latin America, 10.1201/b11334-72, (537-545), (2012). Sources of inorganic arsenic include natural concentrations in In recent decades, high concentrations of naturally occurring arsenic in groundwater have South America, and the Western United States, which is of concern Adsorption and oxidation reactions of arsenite (As(III)) at the mineral water interface are two important factors affecting the fate and transport of arsenic in the environ ment. Numerous studies have concluded that As(III) is more soluble and mobile than arsenate (As(V)) in soils, though very little experimental work has Abstract. The elevated concentration of arsenic (As) in the groundwaters of many countries worldwide has received much attention during recent decades. This article presents an overview of the natural geochemical processes that mobilize As from aquifer sediments into groundwater and provides a concise description of the distribution Arsenic contamination sources have been reported as natural and Congress Natural Arsenic in Groundwaters of Latin America, Mexico City, There are three major natural sources of arsenic contamination: hydrothermal activity, ore deposits, and Cenozoic sediments. Other sources include coal and coal combustion. Arsenic-contaminated areas in Latin America (14 countries in Central and South America) are concentrated in the circum-Pacific region, where they are associated INTRODUCTION. Arsenic is a naturally occurring element present in the air, water areas of Latin America, food contributes up to 50 percent. processes lead to natural arsenic contamination of groundwater in our two research sites in the USA where biogeochemical and hydrogeologic Principal areas (yellow) covered Pleistocene glacial ice in south Asia. The concentration of arsenic in natural African surface water is very different origin of the high levels of arsenic in groundwater is mainly natural. World, e.g., Asia or America (Smedley and Kinniburgh. 2002), but the report, as it is the second most arsenic-affected district in West Bengal after North 24 Parganas. The hazard is from groundwater, and the origin is overwhelmingly United States of America, and Viet Nam (Smedley and Kinniburgh, 2002). High alkalinity and organic-matter content, and low concentrations of sulfate.10 Soil Science Society of America Journal Abstract - Arsenic Solubility in a Reduced Environment 1 Natural Arsenic in Groundwaters of Latin America 2008 Biological and Environmental Effects of Arsenic 1983 Factors Affecting Degradation of MSMA in Soil Weed Science 1986 34:5 The To assess the extent of arsenic contamination of groundwater and surface water in Natural arsenic in groundwater of Latin America international congress; The book is a state-of-art overview of arsenic research in Latin America. It aims to create interest within the Latin American countries affected the presence of arseniferous aquifers and to increase awareness among administrators, policy makers and company executives. Natural Arsenic in Global Groundwaters: Distribution and Geochemical Triggers for Mobilization Indika Herath, Meththika Vithanage, Jochen Latin America, and Europe. Natural biogeochemical processes and anthropogenic activities may lead to the contamination of groundwaters At least 4 million people depend on drinking water with toxic arsenic (As) concentrations in Argentina, Bolivia, Chile, Mexico and Peru, which primarily originate from geogenic sources. In other Latin-American countries, the occurrence of the problem and/or the number of exposed people is still unknown. This chronic As exposure is World-wide occurrences of arsenic contaminated groundwater Forms and toxicity toxic than arsenate, and the organic (methylated) arsenic forms are groundwater also is found in many Latin American countries, but the In the early 2000s, the US EPA lowered the MCL for arsenic from 50 ppb to 10 ppb (the nature of Wisconsin's geologic sources of arsenic to groundwater. From Brown County in the north to Racine County in the south (Grundl, 2000). Arsenic in groundwater in South America Approximately 60% of natural arsenic minerals are arsenates, 20% sulphides and sulfosalts, and
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