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|Title:||Arsenic immobilization in soils amended with drinking-water treatment residuals||Authors:||Sarkar, Dibyendu
Datta, Rupali K.
Makris, Konstantinos C.
|Issue Date:||Mar-2007||Publisher:||Elsevier B.V.||Source:||Environmental Pollution, 2007, Volume 146, Issue 2, Pages 414–419||Abstract:||Use of Fe/Al hydroxide-containing materials to remediate As-contaminated sites is based on the general notion that As adsorption in soils is primarily controlled by Fe/Al (hydr)oxides. A low-cost and potentially effective substitute for natural Fe/Al hydroxides could be the drinking-water treatment residuals (WTRs). Earlier work in our laboratory has shown that WTRs are effective sorbents for As in water. We hypothesized that land-applied WTRs would work equally well for As-contaminated soils. Results showed that WTRs significantly (p < 0.001) increased the soil As sorption capacity. All WTR loads (2.5, 5, and 10%) significantly (p < 0.001) increased the overall amount of As sorbed by both soils when compared with that of the unamended controls. The amount of As desorbed with phosphate (7500 mg kg−1 load) was ∼50%. The WTR effectiveness in increasing soil As sorption capacities was unaffected by differences in both soils' chemical properties.||URI:||http://ktisis.cut.ac.cy/jspui/handle/10488/4210||ISSN:||0269-7491||DOI:||10.1016/j.envpol.2006.06.035||Rights:||© Elsevier Ltd.|
|Appears in Collections:||Άρθρα/Articles|
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