安徽农业科学2011，Vol.39Issue(33)：20455-20457,20494,4.
曝气池活性污泥胞外聚合物对pb2+、Zn2+、Cu2+的吸附研究
Adsorption of Pb2+, Zn2+ and Cu2+ in Water by Extracelluar Polymeric Substances from Activated Sludge in Aeration Pool
摘要
Abstract
[Objective] The research aimed to study the adsorption ability of Pb2+、Zn 2+ and Cu2+ in water by extracelluar polymeric substances from activated sludge in aeration pool. [Method] Extraeelluar polymeric substances,extracting from activated sludge in aeration pool, were used as a biosorbent, adsorption ability of EPS for Pb2+、Zn2+ and Cu2+ removal under different experimental conditions was studied, which focused on the influences of adsorption time,pH,dosage of extrarelluar polymeric substances,different initial metal concentration and coexistence of Pb2+、Zn2+ and Cu2+. [ Result] The effects of EPS adsorption time on adsorption of Pb2+、Zn2+、Cu2+ of all, the removal rate were increased with time, respectively 30、60 and 20 min to reach adsorption equilibrium. The effects of pH are manifested in the acidic conditions with pH increased, decreased after removal of the first rise, when the pH =6, the removal rate reached the maximum, respectively, 52. 17% 、39.83 % and 65.45% .followed by the removal rate increased with increasing pH first decreased and then increased. With the increase in its EPS dosage effect,the removal of Pb2+ was increased the first and then decreased,the adsorption was a gradual downward trend; the removal efficiency and adsorption capacity of Zn2+ decreased; and the removal rate and the adsorption capacity of Cu2+ increased. With the increase of initial metal ion concentration,EPS on Pb2+、Zn2+ and Cu2+ adsorbed increased gradually,while the removal rate decreased. Coexistence of three kinds of metal ions, EPS on the removal rate of Pb2+ with the increase in EPS dosage first increased and then decreased,the removal rate of Zn2+ was gradually reduced,the removal rate of Cu2+ decreased first and increased with the dosage of EPS. After greater than 17 ml, the removal rate of Cu2+ is much higher than Pb2+ and Zn2+. [ Conclusion ] The study provides the theoretical basis for the wastewater treatment of containing heavy metals.关键词
活性污泥/胞外聚合物/吸附/Pb2 +/Zn2+/Cu2+Key words
Activated Sludge/Extraeelluar polymeric substances/Absorption/lead ion/Zinc ion/Copper ion分类
资源环境引用本文复制引用
李章安,曾艳,张明青,张鹏,邵淋飞..曝气池活性污泥胞外聚合物对pb2+、Zn2+、Cu2+的吸附研究[J].安徽农业科学,2011,39(33):20455-20457,20494,4.基金项目
国家自然科学基金(51004108). （51004108）
