Arsenic in volcanic geothermal fluids of Latin America

López, Dina L.; Bundschuh, Jochen; Birkle, Peter; Armienta, M.A.; Cumbal, Luis; Šráček, Ondra; Cornejo, Lorena; Ormachea, Mauricio

doi:10.1016/j.scitotenv.2011.08.043

Cited by 138 publications

(84 citation statements)

References 69 publications

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“…Arsenic also may exist naturally in geothermal systems and springs as a result of the mobilization of As from rocks and mineral phases, and As-contaminated geothermal systems and springs are recognized in many areas around the world (Table 1) [3,8,10,91]. The mobilization of As from rocks into geothermal fluids takes place mainly through active tectonic plate boundaries [91].…”

Section: Occurrence Of Arsenic In Watermentioning

confidence: 99%

“…The mobilization of As from rocks into geothermal fluids takes place mainly through active tectonic plate boundaries [91]. Arsenic from major geothermal reservoirs and related geothermal manifestations, such as hot springs, fumaroles, and solfataras, may directly enter cold aquifers, the vadose zone, and surface waters [8,10].…”

Section: Occurrence Of Arsenic In Watermentioning

confidence: 99%

“…Arsenic from major geothermal reservoirs and related geothermal manifestations, such as hot springs, fumaroles, and solfataras, may directly enter cold aquifers, the vadose zone, and surface waters [8,10]. Many volcanoes, hot springs, fumaroles, and geothermal wells may be found in the Pacific region of Latin America, and these geothermal systems are widely contaminated by As at elevated concentrations [91]. The concentration of As in the Los Humeros geothermal field in Mexico is reported to be as high as 73.6 mg/L, and the attenuation of As in the ground surface may occur via sorption and coprecipitation with iron minerals and organic matter present in sediments [91].…”

Section: Occurrence Of Arsenic In Watermentioning

confidence: 99%

“…Many volcanoes, hot springs, fumaroles, and geothermal wells may be found in the Pacific region of Latin America, and these geothermal systems are widely contaminated by As at elevated concentrations [91]. The concentration of As in the Los Humeros geothermal field in Mexico is reported to be as high as 73.6 mg/L, and the attenuation of As in the ground surface may occur via sorption and coprecipitation with iron minerals and organic matter present in sediments [91]. In deeper geothermal reservoirs, As is released predominantly from Asbearing FeS 2 at temperatures in the range of 150 to 250°C and from FeAsS at higher temperatures [10].…”

Section: Occurrence Of Arsenic In Watermentioning

confidence: 99%

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Natural Arsenic in Global Groundwaters: Distribution and Geochemical Triggers for Mobilization

et al. 2016

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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 of As in different global groundwater systems, with an emphasis on the highly vulnerable regions of Southeast Asia, the USA, Latin America, and Europe. Natural biogeochemical processes and anthropogenic activities may lead to the contamination of groundwaters by increased As concentrations. The primary source of As in groundwater is predominantly natural (geogenic) and mobilized through complex biogeochemical interactions within various aquifer solids and water. Sulfide minerals such as arsenopyrite and As-substituted pyrite, as well as other sulfide minerals, are susceptible to oxidation in the near-surface environment and quantitatively release significant quantities of As in the sediments. The geochemistry of As generally is a function of its multiple oxidation states, speciation, and redox transformation. The reductive dissolution of As-bearing Fe(III) oxides and sulfide oxidation are the most common and significant geochemical triggers that release As from aquifer sediments into groundwaters. The mobilization of As in groundwater is controlled by adsorption onto metal oxyhydroxides and clay minerals. According to recent estimates, more than 130 million people worldwide potentially are exposed to As in drinking water at levels above the World Health Organization's (WHO's) guideline value of 10 μg/L. Hence, community education to strengthen public awareness, the involvement and capacity building of local stakeholders in targeting As-safe aquifers, and direct action and implementation of best practices in identifying safe groundwater sources for the installation of safe drinking water wells through action and enforcement by local governments and international water sector professionals are urgent necessities for sustainable As mitigation on a global scale.

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Section: Occurrence Of Arsenic In Watermentioning

confidence: 99%

Section: Occurrence Of Arsenic In Watermentioning

confidence: 99%

Section: Occurrence Of Arsenic In Watermentioning

confidence: 99%

Section: Occurrence Of Arsenic In Watermentioning

confidence: 99%

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Natural Arsenic in Global Groundwaters: Distribution and Geochemical Triggers for Mobilization

et al. 2016

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“…The environment has been heavily damaged by deforestation related to farming activities and unregulated urban development. Several studies have reported high concentrations of arsenic and pesticides in surface waters [6,[8][9][10][11]. The rural population in El Salvador lives in poverty with only partial access to basic services.…”

Section: Introductionmentioning

confidence: 99%

Survey of Heavy Metal Contamination in Water Sources in the Municipality of Torola, El Salvador, through In Situ Sorbent Extraction

Anticó

Cot

Ribó³

et al. 2017

Water

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Abstract:The presence of heavy metals in water resources directly affects consumer health. The quality of surface water resources in Central America is usually low due to the presence of metals and other pollutants. The lack of analytical instrumentation to perform routine monitoring of water has encouraged the development of easy tools to facilitate the determination of heavy metals in waters in remote sites. In this study, we evaluated the use of different sorbents, such as Adsorbsia As600 (titanium dioxide), Iontosorb Oxin, 8-hydroxyquinoline bearing functional groups, and Duolite GT-73, with thiol functionality, for Cd, Ni, Cu, Zn, and Al extraction. It was found that both Adsorbsia As600 and Iontosorb Oxin allowed the adsorption of all metals, and the recovery was achieved using either HCl or ethylenediaminetetraacetic sodium salt (EDTA) solutions. Hence, Adsorbsia As600 was employed for in situ sampling in the metal contamination evaluation of water samples (from 15 wells and nine storage tanks) from the municipality of Torola, Mozarán, El Salvador. The developed procedure allowed all the metals in the samples to be detected, and Ni and Al were found to be above Salvadoran guidelines for drinking water quality.

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Geogenic and Anthropogenic Arsenic Hazard in Groundwaters and Soils

Polya

Lawson

2015

Arsenic

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Arsenic in volcanic geothermal fluids of Latin America

Cited by 138 publications

References 69 publications

Natural Arsenic in Global Groundwaters: Distribution and Geochemical Triggers for Mobilization

Natural Arsenic in Global Groundwaters: Distribution and Geochemical Triggers for Mobilization

Survey of Heavy Metal Contamination in Water Sources in the Municipality of Torola, El Salvador, through In Situ Sorbent Extraction

Geogenic and Anthropogenic Arsenic Hazard in Groundwaters and Soils

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