Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.14279/3650
Title: | Inorganic arsenic sorption by drinking-water treatment residual-amended sandy soil: effect of soil solution chemistry | Authors: | Nagar, Rachana Sarkar, Dibyendu Datta, Rupali K. Makris, Konstantinos C. |
Major Field of Science: | Natural Sciences | Field Category: | Earth and Related Environmental Sciences | Keywords: | Arsenic;Batch incubation;Drinking-water treatment residuals;Remediation;Sorption | Issue Date: | Jan-2013 | Source: | International Journal of Environmental Science and Technology, 2013, vol. 10, no. 1, pp. 1-10 | Volume: | 10 | Issue: | 1 | Start page: | 1 | End page: | 10 | Journal: | International Journal of Environmental Science and Technology | 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. | URI: | https://hdl.handle.net/20.500.14279/3650 | ISSN: | 17352630 | DOI: | 10.1007/s13762-012-0106-y | Rights: | © CEERS, IAU | Type: | Article | Affiliation : | Cyprus University of Technology Montclair State University Weiss Associates Michigan Technological University |
Publication Type: | Peer Reviewed |
Appears in Collections: | Άρθρα/Articles |
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