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Journal of Zhejiang University SCIENCE B 2006 Vol.7 No.9 P.702~707


Enhanced degradation of carbon tetrachloride by surfactant-modified zero-valent iron

Author(s):  MENG Ya-feng, GUAN Bao-hong, WU Zhong-biao, WANG Da-hui

Affiliation(s):  Institute of Environmental Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   guanbaohong@zju.edu.cn

Key Words:  Enhanced degradation, Sorption, Surfactants, Synergistic effect, Zero-valent iron (ZVI)

MENG Ya-feng, GUAN Bao-hong, WU Zhong-biao, WANG Da-hui. Enhanced degradation of carbon tetrachloride by surfactant-modified zero-valent iron[J]. Journal of Zhejiang University Science B, 2006, 7(9): 702~707.

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publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Enhanced degradation of carbon tetrachloride by surfactant-modified zero-valent iron
%A MENG Ya-feng
%A GUAN Bao-hong
%A WU Zhong-biao
%A WANG Da-hui
%J Journal of Zhejiang University SCIENCE B
%V 7
%N 9
%P 702~707
%@ 1673-1581
%D 2006
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.B0702

T1 - Enhanced degradation of carbon tetrachloride by surfactant-modified zero-valent iron
A1 - MENG Ya-feng
A1 - GUAN Bao-hong
A1 - WU Zhong-biao
A1 - WANG Da-hui
J0 - Journal of Zhejiang University Science B
VL - 7
IS - 9
SP - 702
EP - 707
%@ 1673-1581
Y1 - 2006
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2006.B0702

sorption of carbon tetrachloride (CT) by zero-valent iron (ZVI) is the rate-limiting step in the degradation of CT, so the sorption capacity of ZVI is of great importance. This experiment was aimed at enhancing the sorption of CT by ZVI and the degradation rate of CT by modification of surfactants. This study showed that ZVI modified by cationic surfactants has favorable synergistic effect on the degradation of CT. The CT degradation rate of ZVI modified by cetyl pyridinium bromide (CPB) was higher than that of the unmodified ZVI by 130%, and the CT degradation rate of ZVI modified by cetyl trimethyl ammonium bromide (CTAB) was higher than that of the unmodified ZVI by 81%. This study also showed that the best degradation effect is obtained at the near critical micelle concentrations (CMC) and that high loaded cationic surfactant does not have good synergistic effect on the degradation due to its hydrophilicity and the block in surface reduction sites. Furthermore degradation of CT by ZVI modified by nonionic surfactant has not positive effect on the degradation as the ionic surfactant and the ZVI modified by anionic surfactant has hardly any obvious effects on the degradation.

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