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Effect of pH on Adsorption of Arsenic and Selenium from Landfill Leachate by Clay Minerals
Abstract
Adsorption of As(V), As(III), and Se(IV) anions from municipal landfill leachate solutions by the clay minerals kaolinite and montmorillonite is strongly dependent upon solution pH. The H 2 AsO 4 ‐ and HSeO ‐ 3 ions are the apparent primary As(V) and Se(IV) species being adsorbed by the clay minerals. Activation of the anion adsorption sites on the clay minerals by H + ions is important in determining the amount of HSeO 3 ‐ ions adsorbed by the clay minerals, but it is apparently not important in determining the amount of H 2 AsO 4 ‐ ions adsorbed. Montmorillonite adsorbed more As(V), As(III), and Se(IV) anions than kaolinite. Although no definite proof is given, the higher adsorption by montmorillonite is attributed to a higher edge surface area. The results of the study suggest that disposal of As and Se wastes in municipal landfills, especially under alkaline conditions, could produce ground water contamination by As and Se.
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“Therefore, the mobility and bioavailability of inorganic Se in the environment increases with increasing pH, as well as with decreasing clay and iron oxide content in the soil [130,135,136].”
From Selenium Cycling Across Soil-Plant-Atmosphere Interfaces: A Critical Review (2015) · cites this paper as [130]
In the citing paper
“Selenium can be sorbed to layered double hydroxides or anionic clays through electrostatic interactions, which are highly pH sensitive [130,131,132,133].”
From Selenium Cycling Across Soil-Plant-Atmosphere Interfaces: A Critical Review (2015) · cites this paper as [130]
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Raven, K. P., Jain, A., & Loeppert, R. H. (1998) · Environmental Science & Technology · doi:10.1021/es970421p · Cited by 1,463
Sauvé, S., Hendershot, W. H., & Allen, H. E. (2000) · Environmental Science & Technology · doi:10.1021/es9907764 · Cited by 1,174
Aquatic arsenic: Toxicity, speciation, transformations, and remediation
Sharma, V. K., & Sohn, M. (2009) · Environment International · doi:10.1016/j.envint.2009.01.005 · Cited by 1,157
Wilson, S. C., Lockwood, P. V., Ashley, P. M., & Tighe, M. K. (2009) · Environmental Pollution · doi:10.1016/j.envpol.2009.10.045 · Cited by 870
Anion Adsorption by Soils and Soil Materials
Parfitt, R. (1979) · Advances in agronomy · doi:10.1016/s0065-2113(08)60702-6 · Cited by 801
Metadata
- Authors
- Frost, R. R., & Griffin, R. A.
- Venue
- Soil Science Society of America Journal
- Publisher
- Wiley
- Published
- 1977-01
- Volume
- 41
- Issue
- 1
- Pages
- 53-57
- ISSN
- 0361-5995 (ISSN-L)
- 1435-0661
- OpenAlex
- W2809498828
- Cited by
- 268
- References
- 0
- Citations by year
- 2025: 2 · 2024: 6 · 2023: 8 · 2022: 5 · 2021: 4 · 2020: 5 · 2019: 4 · 2018: 5 · 2017: 7 · 2016: 5 · 2015: 10 · 2014: 7 · 2013: 7 · 2012: 2
- FWCI
- 5.35
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Soil Science Society of America Journal (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Environmental Chemistry › Arsenic contamination and mitigation
- Physical Sciences › Environmental Science › Waste Management and Disposal › Landfill Environmental Impact Studies
- Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Coal and Its By-products
- Keywords
- arsenic adsorption, selenium adsorption, landfill leachate, clay minerals, kaolinite, montmorillonite, pH dependence, arsenate, arsenite, selenite, groundwater contamination
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