Efficiency of Fe-zeolite and Fe-bentonite on co-stabilization of As, Cd and Pb in Contaminated Soil
International Journal of Environmental Monitoring and Analysis
Volume 8, Issue 3, June 2020, Pages: 45-49
Received: Sep. 13, 2018;
Accepted: Jan. 15, 2019;
Published: May 28, 2020
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Sajad Shahmoradi, Soil Science Department, Isfahan University of Technology, Esfahan City, Iran
Majid Afyuni Mohmmad, Soil Science Department, Isfahan University of Technology, Esfahan City, Iran
A. Hajabbasi, Soil Science Department, Isfahan University of Technology, Esfahan City, Iran
Lead (Pb), Cadmium (Cd) and Arsenic (As) have been known as a malicious environment and their toxic effects for plants, animals and humans has been demonstrated. This metals in soil have a different behaviours. The normal concentrations of Cd, As and Pb in agricultural soil were 1.1, 20 and 67 mg.kg-1 respectively. In situ immobilization of Lead and Cadmium (by zeolite and bentonite) and Arsenic (by iron) in soil is well recognized. However, studies on soils that are simultaneously contaminated with lead, cadmium and arsenic are fewer, and assessment of the sorbents effectiveness on co-stabilization of As, Cd and Pb is also necessary. In this study, local bentonite and zeolite were converted to Fe-zeolite and Fe-bentonite. A Pb-, Cd- and As-contaminated soil has been treated with modified bentonite and zeolite separately in 1 and 6 wt% rate. After one month of incubation in at 80% of field capacity moisture, Sunflower (Helianthus annuus. L) plant was transplanted into each pot. The result showed that Fe-zeolite and Fe-bentonite decreased concentration of Pb and Cd extractable with DTPA-TEA; however, Fe-bentonite in the soil reduced water-soluble arsenate, but Fe-zeolite increased it. Finally application of Fe-bentonite can be an effective approach to co-stabilize Pb, Cd and As, in contaminated soils.
Majid Afyuni Mohmmad,
Efficiency of Fe-zeolite and Fe-bentonite on co-stabilization of As, Cd and Pb in Contaminated Soil, International Journal of Environmental Monitoring and Analysis.
Vol. 8, No. 3,
2020, pp. 45-49.
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