Inorganic arsenic sorption by drinking-water treatment residual-amended sandy soil: Effect of soil solution chemistry
Document Type
Article
Publication Date
1-10-2013
Department
Department of Biological Sciences
Abstract
Previous studies in our laboratory have demonstrated that drinking-water treatment residuals are effective sorbents of arsenic V. However, the effect of soil solution chemistry on arsenic V sorption by drinking-water treatment residuals-amended soils remains to be explored. The current study uses a batch incubation experimental set up to evaluate the effect of soil solution pH, competing ligands, and complexing metal on arsenic V sorption by a sandy soil (Immokalee series) amended with two rates (25 and 50 g kg-1) of aluminum and iron-based drinking-water treatment residuals. Experiments were conducted at three initial arsenic loads (125, 1,875, 3,750 mg kg-1) and a constant solid: solution ratio of 200 g L-1. An optimum equilibration time of 8 days, obtained from kinetic studies, was utilized for sorption experiments with both aluminum and iron drinking-water treatment residual-amended soil. Presence of phosphate decreased arsenic V sorption by both aluminum and iron drinking-water treatment residual amended soils, with a strong dependence on pH, drinking-water treatment residual types, drinking-water treatment residual application rates, and phosphate concentrations. Addition of sulfate had no effect on arsenic V sorption by aluminum or iron drinking-water treatment residual-amended soil. A complementing effect of calcium on arsenic V sorption was observed at higher pH. Results elucidating the effect of soil solution chemistry on the arsenic V sorption will be helpful in calibrating drinking-water treatment residual as a sorbent for remediation of arsenic-contaminated soils.
Publication Title
International Journal of Environmental Science and Technology
Recommended Citation
Nagar, R.,
Sarkar, D.,
Makris, K.,
&
Datta, R.
(2013).
Inorganic arsenic sorption by drinking-water treatment residual-amended sandy soil: Effect of soil solution chemistry.
International Journal of Environmental Science and Technology,
10(1), 1-10.
http://doi.org/10.1007/s13762-012-0106-y
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/2375
Publisher's Statement
© 2012 CEERS, IAU. Publisher’s version of record: https://doi.org/10.1007/s13762-012-0106-y