Effects of acidification and natural organic materials on the mobility of arsenic in the environment

Xia, Huan; Allard, Bert; Grimvall, Anders

doi:10.1007/bf00282890

Cited by 172 publications

(80 citation statements)

References 12 publications

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“…Much work has been devoted to the study of arsenate adsorption on individual soil minerals, for example on iron oxides (Pierce and Moore, 1982;Fendorf et al, 1997), aluminium oxides (Anderson et al, 1975;Xu et al, 1991), manganese oxides (Oscarson et al, 1983), phyllosilicate clay minerals (Frost and Griffin, 1977;Goldberg and Glaubig, 1988), and on calcium carbonate (Goldberg and Glaubig, 1988). However, although there are some studies of arsenate adsorption on intact soils (e.g.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of arsenate on soils. Part 1: Laboratory batch experiments using 16 Chinese soils with different physiochemical properties

Jiang

Zhang

Shan

et al. 2005

Environmental Pollution

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The Langmuir two-surface equation fits arsenate adsorption onto soils. AbstractLaboratory batch experiments were carried out to study the adsorption of arsenate on 16 Chinese soils with different physicochemical properties. Wide differences in arsenate adsorption were observed, and the Jiangxi and Hubei soils were more effective sorbents for arsenate than other soils. The Langmuir one-surface and two-surface equations were used to model the arsenate adsorption data. Except for the Jiangxi and Hubei soils, the Langmuir one-surface equation gave reasonably good fits to the arsenate adsorption data. However, the Langmuir two-surface equation generally provided a better fit than the Langmuir onesurface equation. For soils with relative high organic matter (OM), dissolved organic carbon (DOC) or extractable phosphate, the Langmuir one-surface and two-surface equations described the adsorption isotherms similarly. In contrast, for soils with relatively low contents of OM, DOC or extractable phosphate, the Langmuir two-surface equation gave the better fit to the arsenate adsorption data.

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Section: Introductionmentioning

confidence: 99%

Adsorption of arsenate on soils. Part 1: Laboratory batch experiments using 16 Chinese soils with different physiochemical properties

Jiang

Zhang

Shan

et al. 2005

Environmental Pollution

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“…Both dissolved silicate (Luxton et al, 2008) and organic matter (Grafe et al, 2001(Grafe et al, , 2002 can also competitively limit arsenic adsorption or promote desorption, with concentrations common to soils and sediments having an appreciable impact on dissolved arsenic concentrations. Carbonate can also compete with arsenic for adsorption sites on mineral surfaces ( Van Geen et al, 1994;Kim et al, 2000;Villalobos and Leckie, 2001;Appelo et al, 2002;Lee and Nriagu, 2003 ), and natural organic matter may also compete with As and inhibit arsenic adsorption onto iron (hydr)oxides due to competitive adsorption (Xu et al, 1991;Redman et al, 2002). Other anions, such as Cl -, SO 4 2-, and NO 3 -, have minimal impact on As desorption, yet these ions can contribute to ionic strength and salinization effects on As retention in soils and sediments (Gupta and Chen, 1978;Smith et al, 1998) that are potentially important in the desorption of arsenite.…”

Section: Ion Displacementmentioning

confidence: 99%

Arsenic Chemistry in Soils and Sediments

Fendorf

Nico

Kocar

et al. 2010

Synchrotron-Based Techniques in Soils and Sediments

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“…In natural conditions, As speciation is controlled by chemical properties such as pH and redox conditions, along with absorption, desorption, and ion exchange reactions (Ferguson and Gavis 1972;Sadiq 1997). As adsorption is high at low pH and decreases with increasing pH (Xu et al 1991). At all pH values, arsenate bonds more easily than arsenite and therefore, arsenite is also more mobile than arsenate (Kim et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Factors Controlling the Migration of Tailings-Derived Arsenic: A Case Study at the Yara Siilinjärvi Site

et al. 2016

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The behaviour of arsenic (As) derived from tailings was investigated at the Yara Siilinjärvi apatite mine and industrial site in eastern Finland. The study assessed factors influencing the migration and fate of As and compared the anthropogenic As load to the natural geogenic background. Environmental risks related to As were assessed by examining the As concentrations in humus, glacial till, aquatic sediments, groundwater, and surface water. The occurrence and fractionation of As and the presence of secondary precipitates and geochemical transformations in the tailings and in the ambient soil and sediment were evaluated by selective extraction. The water-derived emissions were evaluated by field measurements, hydrogeochemical analysis, and modelling. Results indicate elevated environmental risks due to dust and seepage emissions from the tailings since the concentrations and mobility of As and other potentially harmful elements (PHEs) such as Co, Ni, and Zn were elevated relative to the geogenic background. These elements were mainly associated with Fe (oxy)hydroxides in the soil and their mobility was closely linked to Fe biogeochemistry. Additionally, although the concentrations of As and PHEs were high in the tailings pond and seepage water, they decreased in ambient groundwater and surface water, indicating Fe (oxy)hydroxide stability. This was supported by hydrogeochemical modelling, which indicated precipitation of Fe oxides and hydroxides. According to speciation modelling, As was present mainly as toxic trivalent arsenious acid (H 3 AsO 3 ) in groundwater and as the less toxic pentavalent As acid (H 2 AsO 4 -and HAsO 4 2-) in surface water.

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Effects of acidification and natural organic materials on the mobility of arsenic in the environment

Cited by 172 publications

References 12 publications

Adsorption of arsenate on soils. Part 1: Laboratory batch experiments using 16 Chinese soils with different physiochemical properties

Adsorption of arsenate on soils. Part 1: Laboratory batch experiments using 16 Chinese soils with different physiochemical properties

Arsenic Chemistry in Soils and Sediments

Factors Controlling the Migration of Tailings-Derived Arsenic: A Case Study at the Yara Siilinjärvi Site

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