Cited by 268Arsenic contamination and mitigationLandfill Environmental Impact StudiesCoal and Its By-products

Effect of pH on Adsorption of Arsenic and Selenium from Landfill Leachate by Clay Minerals

Frost, R. R., Griffin, R. A.·1977·Soil Science Society of America Journal

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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Crossref · 10.2136/sssaj1977.03615995004100010019x

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  • The mobility and bioavailability of inorganic selenium in the environment increases with increasing pH and with decreasing clay and iron oxide content in the soil.

    “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].”
  • Selenium can be sorbed to layered double hydroxides or anionic clays through electrostatic interactions, which are highly pH sensitive.

    “Selenium can be sorbed to layered double hydroxides or anionic clays through electrostatic interactions, which are highly pH sensitive [130,131,132,133].”

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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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