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Effect of different surfactants on removal efficiency of heavy metals in sewage sludge treated by a novel method combining bio-acidification with Fenton oxidation

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【作者】 任苗苗袁兴中朱艺黄华军曾光明李辉陈明王侯陈畅亚林宁波

【Author】 REN Miao-miao;YUAN Xing-zhong;ZHU Yi;HUANG Hua-jun;ZENG Guang-ming;LI Hui;CHEN Ming;WANG Hou;CHEN Chang-ya;LIN Ning-bo;College of Environmental Science and Engineering, Hunan University;Key Laboratory of Environment Biology and Pollution Control of Ministry of Education(Hunan University);Hunan Academy of Forestry;Hunan Engineering Research Centre for Biodiesel;

【机构】 College of Environmental Science and Engineering, Hunan UniversityKey Laboratory of Environment Biology and Pollution Control of Ministry of Education(Hunan University)Hunan Academy of ForestryHunan Engineering Research Centre for Biodiesel

【摘要】 The aim of this work was to investigate the effect of different surfactants on the removal efficiency of heavy metals in sewage sludge treated by a method combining bio-acidification with Fenton oxidation. Four surfactants were adopted such as anionic surfactant(sodium dodecyl benzene sulfonate, SDBS), nonionic surfactants(tween-20 and tween-60) and cationic surfactant(hexadecyl trimethyl ammonium chloride, HTAC), respectively. The indigenous sulfur-oxidizing bacteria in bio-acidification phase were enriched and cultured from fresh activated sludge obtained from a wastewater treatment plant. It is shown that different surfactants exhibited distinct effect on the removal efficiency of heavy metals from sewage sludge. The nonionic surfactants,especially tween-60, promotes the solubilization of heavy metals, while the anionic and cationic surfactants hinder the removal of heavy metals. Copper is efficiently leached. The removal efficiency of cadium is relatively lower than that of Cu due to the demand for rigorous p H value. Lead is leached with a low efficiency as the formation of low soluble Pb SO4 precipitates.

【Abstract】 The aim of this work was to investigate the effect of different surfactants on the removal efficiency of heavy metals in sewage sludge treated by a method combining bio-acidification with Fenton oxidation. Four surfactants were adopted such as anionic surfactant(sodium dodecyl benzene sulfonate, SDBS), nonionic surfactants(tween-20 and tween-60) and cationic surfactant(hexadecyl trimethyl ammonium chloride, HTAC), respectively. The indigenous sulfur-oxidizing bacteria in bio-acidification phase were enriched and cultured from fresh activated sludge obtained from a wastewater treatment plant. It is shown that different surfactants exhibited distinct effect on the removal efficiency of heavy metals from sewage sludge. The nonionic surfactants,especially tween-60, promotes the solubilization of heavy metals, while the anionic and cationic surfactants hinder the removal of heavy metals. Copper is efficiently leached. The removal efficiency of cadium is relatively lower than that of Cu due to the demand for rigorous p H value. Lead is leached with a low efficiency as the formation of low soluble Pb SO4 precipitates.

【基金】 Project(21276069)supported by the National Natural Science Foundation of China;Project(CX2012B139)supported by the Hunan Province Innovation Foundation for Postgraduate,China
  • 【文献出处】 Journal of Central South University ,中南大学学报(英文版) , 编辑部邮箱 ,2014年12期
  • 【分类号】X703
  • 【被引频次】5
  • 【下载频次】68
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