Paper Title:
Selecting an Effective Extractant for Removing Cr from Contaminated Soil
  Abstract

The effects of various extractants removing Cr from the soil of chromite ore processing residue (COPR) deposited sites were studied in order to select the optimal extractant agent. The effects of this agent on the removal of Cr(VI) and Cr(III) in the contaminated soil were also investigated. The results showed that organic complexing agents had higher removal efficiency than that of inorganic complexing agents due to the high content of Cr(III) in the soil(90.3%). The Cr removal of citric/sodium citrate (mole ratio: 1:1) was 35.95% in 24h. The reason why citric/sodium citrate removed more Cr than other agents is that citric can solubilize the mineral matrix, compete for the surfaces sites to desorb Cr(VI) and remove Cr(III) by its complexation. The concentration radio of Cr(VI) and Cr(III) in the initial soil was 0.11. Thus improving the removal of Cr(III)is the key point of improving the total Cr removal.

  Info
Periodical
Advanced Materials Research (Volumes 183-185)
Chapter
Environmental Biotechnology
Edited by
Yanguo Shi and Jinlong Zuo
Pages
1437-1441
DOI
10.4028/www.scientific.net/AMR.183-185.1437
Citation
L. L. Liang, S. C. Li, G. Li, X. L. Yang, B. Wu, X. C. Dong, J. Guan, "Selecting an Effective Extractant for Removing Cr from Contaminated Soil", Advanced Materials Research, Vols. 183-185, pp. 1437-1441, 2011
Online since
January 2011
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Price
$32.00
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