Speciation analysis of arsenic in groundwater from Inner Mongolia with an emphasis on acid-leachable particulate arsenic

Gong, Zhaoning; Lu, Xiufen; Watt, Corinna; Wen, Bin; He, Bin; Mumford, Judy L.; Ning, Zhixiong; Xia, Yajuan; Le, X. Chris

doi:10.1016/j.aca.2005.08.062

Cited by 47 publications

(30 citation statements)

References 32 publications

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“…Furthermore, correlation coefficients between arsenic species in saliva and total arsenic in drinking water were As III 0.470, As V 0.589, MMA V 0.663, and DMA V 0.485 (P Ͻ0.001 for all). Arsenic in drinking water is mostly in inorganic forms, As V and As III (31)(32)(33)(34)(35). Various organic arsenic species are present in food (34 -35 ).…”

Section: Discussionmentioning

confidence: 99%

Arsenic Speciation Analysis in Human Saliva

Yuan

Oro

et al. 2008

Clinical Chemistry

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Section: Discussionmentioning

confidence: 99%

Arsenic Speciation Analysis in Human Saliva

Yuan

Oro

et al. 2008

Clinical Chemistry

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“…(Fig. 1) [5,92,94]. In the pH range of 4 to 10, As(V) species is negatively charged in water, whereas the predominant As(III) species is neutral in charge because of redox potential and the presence of complexing ions such as sulfur, iron, and calcium and microbial activity [95].…”

Section: Speciation Of Arsenicmentioning

confidence: 99%

“…Three types of clay minerals have been used successfully to oxidize As(III), suggesting that the oxidation and adsorption of produced As(V) occur on the surface of clay minerals [101]. Moreover, the oxidation of trivalent As is found to be catalyzed by some microorganisms, including Pseudomonas arsenitoxidans, Alcaligenes faecalis, Cenibacterium arsenoxidans, Thermus sp., Thermus thermophilus, and Agrobacterium tumefaciens, using oxygen as the terminal electron acceptor [31,94,102,103]. Bacteria species attached to submerged macrophytes in a stream near geothermal sources are reported to be capable of mediating the rapid oxidation of As(III) [104], and the oxidation reaction may be expressed as follows [95]:…”

Section: Oxidation Of Arsenitementioning

confidence: 99%

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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“…H 3 AsO 3 0 ) and any colloids that are small enough to pass through a 0.45 μm filter. The arsenic that collects on the filters would be identified as particulate (Gong et al, 2006). Colloids in water samples may consist of arsenic-sorbing iron (oxy)(hydr)oxides, clay minerals, various organic complexes, and some microorganisms.…”

Section: 'Dissolved' and Particulate Arsenic In Groundwatermentioning

confidence: 99%

“…PM may also be collected on filters and analyzed directly for arsenic (Gong et al, 2006). Identifying the amount of particulate and dissolved arsenic species in groundwater samples has practical applications in water treatment because if most of the arsenic in the samples is in PM, filtering may be an easy and inexpensive treatment process.…”

Section: 'Dissolved' and Particulate Arsenic In Groundwatermentioning

confidence: 99%

Arsenic in Natural Environments

Henke

2009

Arsenic

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Speciation analysis of arsenic in groundwater from Inner Mongolia with an emphasis on acid-leachable particulate arsenic

Cited by 47 publications

References 32 publications

Arsenic Speciation Analysis in Human Saliva

Arsenic Speciation Analysis in Human Saliva

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

Arsenic in Natural Environments

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