Cited by 6Heavy metals in environmentArsenic contamination and mitigationAdsorption and biosorption for pollutant removal

Effect of arsenate on adsorption of Zn(II) by three variable charge soils

Liang, Jing, Xu, Ren-kou, Tiwari, Diwakar, Zhao, An-zhen·2007·Soil Research

Abstract

The effect of arsenate on adsorption of Zn(II) in 3 variable charge soils (Hyper-Rhodic Ferralsol, Rhodic Ferralsol, and Haplic Acrisol) and the desorption of pre-adsorbed Zn(II) in the presence of arsenate were investigated in this study. Results showed that the presence of arsenate led to an increase in both the adsorption and desorption of Zn(II) in these variable charge soils. It was also suggested that the enhanced Zn(II) adsorption by arsenate was mainly due to the increase in negative surface charge of the soils induced by the specific adsorption of arsenate, and the increase in electrostatically adsorbed Zn(II) was responsible for the increase in the desorption of Zn(II). The effect of arsenate on Zn(II) adsorption primarily depends on the initial concentration of arsenate and Zn(II), the system pH, and the nature of soils. The enhanced adsorption of Zn(II) increased with the increase in the initial concentration of arsenate and the amount of arsenate adsorbed by the soils. The presence of arsenate decreased the zeta potential of soil suspensions and soil IEP and thus shifted the adsorption edge of Zn(II) to a lower pH region. The effect of arsenate on Zn(II) adsorption in these 3 soils followed the order Hyper-Rhodic Ferralsol > Rhodic Ferralsol > Haplic Acrisol, which was consistent to the contents of iron oxides in these soils and the amount of arsenate adsorbed by the soils.

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Crossref · 10.1071/sr06181

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25 of 25 references verified0 citation errors · 0 not checkable

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  • Heavy metals sorbed through electrostatic attraction were replaced by neutral salts (e.g., KNO3).

    “However, the heavy metals sorbed through the electrostatic attraction were replaced by neutral salts (e.g., KNO3).”
  • Liang et al. reported that the presence of arsenate and chromate increased the sorption of Zn, Cd, and Cu onto variable charge minerals and soils due to the increase in negative surface charge for the specific adsorption of these anions.

    “Liang et al. [45, 46] also reported that the presence of arsenate and chromate increased the sorption of Zn, Cd, and Cu onto variable charge minerals and soils due to the increase in negative surface charge for the specific adsorption of these anions.”

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Authors
Liang, J., Xu, R.-K., Tiwari, D., & Zhao, A.-Z.
Affiliations
  • Chinese Academy of Sciences (CN)
  • Mizoram University (IN)
  • AState Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, PO Box 821, Nanjing, China.
Corresponding author
Xu, Ren-kou
Venue
Soil Research
Published
2007-09-20
Volume
45
Issue
6
Pages
465-472
ISSN
  • 0004-9573 (ISSN-L)
  • 1838-675X
  • 1838-6768
OpenAlex
W2067806554
Cited by
6
References
26
Citations by year
2021: 1 · 2018: 1 · 2017: 1 · 2016: 1 · 2015: 1 · 2012: 1
FWCI
0.00
Type
journal article
Language
en
Open access
closed
Locations
Soil Research (publishedVersion)
Funders
  • National Natural Science Foundation of China
  • National Key Research and Development Program of China
Topics
  • Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
  • Physical Sciences › Environmental Science › Environmental Chemistry › Arsenic contamination and mitigation
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
Keywords
arsenate, zinc adsorption, variable charge soils, zinc desorption, zeta potential, isoelectric point, iron oxide, Rhodic Ferralsol, soil pH

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