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• 环境科学 • 上一篇    下一篇

玉米加工污水剩余污泥吸附铅和镉的影响因素

孙文田, 董德明, 张 荣, 朱艳芳   

  1. 吉林大学 环境与资源学院, 长春 130012
  • 收稿日期:2008-06-13 修回日期:1900-01-01 出版日期:2008-11-26 发布日期:2008-11-26
  • 通讯作者: 董德明

Factors Affecting Adsorption of Lead and Cadmium onto Excess Sludge Obtained from Corn Processing Wastewater Treatment Station

SUN Wentian, DONG Deming, ZHANG Rong, ZHU Yanfang   

  1. College of Environment and Resources, Jilin University, Changchun 130012, China
  • Received:2008-06-13 Revised:1900-01-01 Online:2008-11-26 Published:2008-11-26
  • Contact: DONG Deming

摘要: 以玉米加工污水剩余活性污泥为吸附剂, 研究吸附时间、 温度、 pH值、 污泥投加量、 铅镉共存等因素对污泥吸附铅、 镉的影响. 结果表明, 玉米加工污水剩余污泥吸附铅、 镉是快速过程, 温度对吸附影响较小, 吸附的最佳pH=4~8, 铅和镉的吸附量随污泥投加量的增加而增加, 铅吸附最佳投泥量为0.5 g/L, 污泥吸附不同初始质量浓度镉的最佳污泥投加量不同, 为0.5~2 g/L; 在铅与镉共存的吸附体系中, 铅的存在对镉的吸附有抑制作用, 而镉的存在对铅的吸附几乎没有影响.

关键词: 剩余活性污泥, 铅, 镉, 吸附, 玉米加工废水

Abstract: The excess sludge driven from corn processing wastewater treatment station was applied to absorbinglead and cadmium. The factors affecting the adsorption including adsorption time, temperature, pH value, excess sludge mass and the coexisting of lead and cadmium were investigated and analyzed. The result shows the adsorption of lead and cadmium onto the sludge is a quick process and the temperature has a less effect on the adsorption of lead and cadmium onto the sludge. The optimal adsorption pH range of the system for lead or cadmium is from 4 to 8. The adsorption capacity of lead and cadmium onto the sludge increases with the sludge mass increasing; the optimal sludge mass for lead  adsorptionis 0.5 g/L, the optimal sludge mass for cadmium adsorption is differe nt for the different initial concentration of cadmium and the value is between 0.5 g/L and 2 g/L. In the coexisting adsorption system of lead and cadmium, lead coexisted has an inhibitory effect on the adsorption of cadmium and cadmium coexisted has little effect on the adsorption of lead.

Key words: excess activated sludge, lead, cadmium, adsorption, corn processing wastewater

中图分类号: 

  • X132