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›› 2009, Vol. 9 ›› Issue (3): 492-497.

• 反应与分离 • 上一篇    下一篇

厌氧颗粒污泥对水中铅离子的吸附与解吸附

陈晓 唐艳葵 童张法 韦星任 梁达文   

  1. 广西大学化学化工学院 广西大学化学化工学院 广西大学化学化工学院 广西大学化学化工学院 广西玉林师范学院
  • 收稿日期:2009-02-23 修回日期:2009-04-02 出版日期:2009-06-20 发布日期:2009-06-20
  • 通讯作者: 童张法

Adsorption and Desorption of Lead(II) from Aqueous Solution by Anaerobic Granular Sludge

CHEN Xiao TANG Yan-kui TONG Zhang-fa WEI Xing-ren LIANG Da-wen   

  1. School of Chemistry and Chemical Engineering, Guangxi University School of Chemistry and Chemical Engineering, Guangxi University School of Chemistry and Chemical Engineering，Guangxi University，Nanning School of Chemistry and Chemical Engineering，Guangxi University，Nanning Yulin Teacher's College of Guangxi
  • Received:2009-02-23 Revised:2009-04-02 Online:2009-06-20 Published:2009-06-20
  • Contact: TONG Zhang-fa

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摘要： 采用厌氧颗粒污泥对废水中的Pb2+进行了吸附和解吸附研究. 结果表明，影响Pb2+吸附的主要因素是溶液pH、污泥投加量、Pb2+的初始浓度及接触时间. 处理25 mL Pb2+浓度为100 mg/L的(pH 4~5)模拟废水时，投加0.1 g污泥，污泥吸附容量为121.1 mg/g，对废水中Pb2+的吸附率可达99.5%. 未经烘干处理的颗粒污泥有更强的吸附能力，其吸附过程符合Lagergren二级动力学方程，吸附等温线可由Langmuir和Freundlich方程很好地拟合，相关性良好. 吸附Pb2+后的厌氧颗粒污泥用0.1 mol/L硝酸经3次解吸后，解吸率可达93.11%.

关键词: 厌氧颗粒污泥, Pb2+, 吸附, 解吸附

Abstract: Anaerobic granular sludge is used to remove Pb2+ from aqueous solution. The results show that pH, sludge content, initial Pb2+ concentration in aqueous solution and contact time are the main factors affecting the adsorption of Pb2+. It is found that adsorption capacity 121.1 mg/g and adsorption rate 99.5% are achieved when initial Pb2+ concentration is 100 mg/L, pH 4~5 and sludge content 4 g/L, adsorption equilibrium is reached in 60 min. The viable sludge shows higher adsorption capability compared to the nonviable sludge. The adsorption process fits to the Lagergren kinetics equation. Adsorption of Pb2+ on the anaerobic granular sludge follows Lagergren kinetics expression and the experimental data are correlated reasonably well by Langmuir and Freundlich isotherm models. Using 0.1 mol/L HNO3 as desorption reagent, the desorption rate is 93.11% after three times of desorption processing.

Key words: anaerobic granular sludge, Pb2+, adsorption, desorption

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