Effect of Municipal Solid Waste Compost on Arsenic Leaching throughout Calcareous Soil Columns

Article type: Research Article

Authors: Darvishi, Faranak | Souri, Bubak^*

Affiliations: Department of Environmental Sciences, Faculty of Natural Resources, University of Kurdistan, P.O. Box 416 Sanandaj, Iran

Correspondence: [*] Corresponding Author. bsouri@uok.ac.ir

Abstract: Effect of municipal solid wastes on arsenic leaching in soils is a controversial issue. Calcareous soil naturally bearing considerable amount of arsenic samples from Qorveh plain, in western Iran, was applied to assemble nine soil columns including three treatments of 0 (control), 30 and 60 percent of municipal solid wastes compost each triplicated. Four months of leaching experiment using 300 ml of 833 mg L−1 ammonium phosphate twice a week showed less arsenic leaching for composted soil columns compared to the controls. The results showed that iron, phosphate, nitrate and arsenic concentration leakage significantly differed between the composted and the control columns as decreasing of arsenic leaching throughout the composted columns was also seen. Additionally, it seems soil water retention capacity influenced by amount of the compost added to the columns affects arsenic leaching intensity.

Keywords: Arsenic, leaching, compost, ammonium phosphate, calcareous soil column

DOI: 10.3233/AJW-160037

Journal: Asian Journal of Water, Environment and Pollution, vol. 13, no. 4, pp. 41-47, 2016