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《Journal of Central South University(Science and Technology)》 2009-01
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Influence of surfactants on detoxification of chromium-containing slag by Achromobacter sp. CH-1

CHAI Li-yuan,CHEN Li-juan,HUANG Yan,SHU Yu-de,SU Yan-rong (School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China)  
To improve the detoxification of chromium-containing slag by Achromobacter sp. CH-1,different types of surfactants were used to accelerate Cr(Ⅵ ) leaching from the chromium-containing slag. The leaching rate of Cr(Ⅵ ) and pH in the leaching solution,combined with the growth velocity and Cr(Ⅵ ) reduction capability of the bacterial in different concentrations of the surfactants were used to evaluate the effects of the surfactants on the detoxification of chromium-containing slag by A. sp. CH-1. The results show that when relatively low-concentration are added to the medium,the growth and Cr(Ⅵ ) reduction ability of the bacterial are equal to those when there is no surfactant in the medium. Anionic surfactant sodium dodecyl sulphate(SDS),nonionic surfactants Tween 60 and Tween 80 can all improve the leaching rate of Cr(Ⅵ ) of 8%,9%,and 11%,respectively,with optimal dosages of 75,200,and 250 mg/L. When the cationic surfactant dodecyl trimethyl ammonium bromide(DTAB) is in the medium,there is no obvious influence on the detoxifcation of chromium-containing slag by A. sp. CH-1.
【Fund】: 国家高技术研究发展计划项目(2006AA06Z374);; 湖南省科技计划项目(2008SK2007);; 长沙市科技计划项目(K0802144-31)
【CateGory Index】: X705
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