| 聚环氧琥珀酸对污泥中镉的萃取作用 |
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| 作者姓名： | ZHU Zhi-Liang ZHANG Li-Hu ZHANG Hu QIU Yan-Ling ZHANG Rong-Hu ZHAO Jian-Fu |
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| 作者单位： | ZHU Zhi-Liang,ZHANG Hua,QIU Yan-Ling,ZHANG Rong-Hua,ZHAO Jian-Fu(State Key Laboratory of Pollution Control and Resource Reuse,Tongji University,Shanghai 200092 China);ZHANG Li-Hua(State Key Laboratory of Pollution Control and Resource Reuse,Tongji University,Shanghai 200092 China;Chemistry and Biology Engineering Department,Sanming College,Sanming 365004 China)
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| 基金项目： | 国家高技术研究发展计划(863计划)，国家自然科学基金 |
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| 摘 要： | Polyepoxysuccinic acid (PESA), as an environmental benign biodegradable chelant, was used to remove heavy metals from the sewage sludge of Shanghai Taopu Wastewater Treatment Plant. The extraction of cadmium (Cd) from sewage sludge using aqueous solution of PESA was studied. It was found that PESA was capable of extracting Cd from the sludge, and the extraction efficiency was dependent on both pH and the concentration of the chelating reagent. The extraction efficiency decreased gradually with increasing of pH, whereas the dependency on pH decreased as the concentration of PESA increased. In the case of the high PESA to total metal ratio, e.g., 10:1, the extraction efficiency reached above 70% within the pH range from 1 to 7. The highest extraction efficiency obtained in the experiment was 78％. By comparing the contents of the heavy metals in sewage sludge before and after the extraction, it was found that the extracted Cd came mainly from the four fractions: acid-soluble, reducible, oxidizable, and water-soluble fractions.
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| 关 键 词： | 聚环氧琥珀酸 污泥利用 萃取效率 重金属污泥 提取效率 污水处理厂 镉 浓度增加 |
| 收稿时间： | 29 July 2008 |
Extraction of cadmium from sewage sludge using polyepoxysuccinic acid |
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| ZHU Zhi-Liang,ZHANG Li-Hu,ZHANG Hu,QIU Yan-Ling,ZHANG Rong-Hu,ZHAO Jian-Fu.Extraction of cadmium from sewage sludge using polyepoxysuccinic acid[J].Pedosphere,2009,19(2):137-142. |
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| Authors: | ZHU Zhi-Liang ZHANG Li-Hu ZHANG Hu QIU Yan-Ling ZHANG Rong-Hua and ZHAO Jian-Fu |
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| Institution: | [1]State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092 China [2]Chemistry and Biology Engineering Department, Sanming College, Sanming 365004 China |
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| Abstract: | Polyepoxysuccinic acid (PESA),as an environmental benign biodegradable chelant,was used to remove heavy metals from the sewage sludge of Shanghai Taopu Wastewater Treatment Plant.The extraction of cadmium (Cd) from sewage sludge using aqueous solution of PESA was studied.It was found that PESA was capable of extracting Cd from the sludge,and the extraction efficiency was dependent on both pH and the concentration of the chelating reagent.The extraction efficiency decreased gradually with increasing of pH,whereas the dependency on pH decreased as the concentration of PESA increased.In the case of the high PESA to total metal ratio,e.g.,10:1,the extraction efficiency reached above 70% within the pH range from 1 to 7.The highest extraction efficiency obtained in the experiment was 78%.By comparing the contents of the heavy metals in sewage sludge before and after the extraction,it was found that the extracted Cd came mainly from the four fractious:acid-soluble,reducible,oxidizable,and water-soluble fractions. |
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| Keywords: | cadmium extraction PESA sewage sludge |
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