工业水处理 ›› 2020, Vol. 40 ›› Issue (2): 59-62. doi: 10.11894/iwt.2019-0014

• 试验研究 • 上一篇    下一篇

净水厂干化铝污泥对水中Pb2+和Cu2+的吸附研究

马晨阳(),段润斌*(),杜震宇   

  1. 太原理工大学环境科学与工程学院, 山西太原 030024
  • 收稿日期:2019-10-28 出版日期:2020-02-20 发布日期:2020-02-22
  • 通讯作者: 段润斌 E-mail:747624538@qq.com;duanrunbin@qq.com
  • 作者简介:马晨阳(1994-),硕士研究生。电话:15712738633, E-mail:747624538@qq.com
  • 基金资助:
    山西省重点研发计划重点项目计划(201603D111018);山西省重点研发计划(一般)社会发展项目(201703D321009-5)

Adsorption of Pb2+ and Cu2+ in water by dried alum-sludge from a water treatment plant

Chenyang Ma(),Runbin Duan*(),Zhenyu Du   

  1. College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2019-10-28 Online:2020-02-20 Published:2020-02-22
  • Contact: Runbin Duan E-mail:747624538@qq.com;duanrunbin@qq.com
  • Supported by:
    山西省重点研发计划重点项目计划(201603D111018);山西省重点研发计划(一般)社会发展项目(201703D321009-5)

摘要:

采用净水厂干化铝污泥吸附处理水中的Pb2+和Cu2+,研究了污泥投加量、pH、Pb2+和Cu2+初始浓度、吸附时间以及温度对吸附效果的影响。结果表明,Pb2+和Cu2+的去除率均随污泥投加量的增加和溶液pH的升高而增大;Langmuir模型能够准确描述干化铝污泥对Pb2+和Cu2+的吸附特性,20℃时其对Pb2+和Cu2+的饱和吸附量分别可达212.77、73.53 mg/g;干化铝污泥对Pb2+和Cu2+的吸附动力学符合准二级动力学模型;吸附过程为自发、吸热、熵增的反应。

关键词: 净水厂污泥, 吸附, 重金属离子

Abstract:

This paper was aimed to investigate the adsorption of Pb2+ and Cu2+ in water by dried alum-sludge(DAS) from a water treatment plant. The effects of sludge dosage, initial pH, initial concentrations of Pb2+ and Cu2+, adsorption time and temperature on Pb2+ and Cu2+ adsorption were investigated, respectively. The results showed that the adsorption removal rates of Pb2+ and Cu2+ increased with increasing the sludge dose or pH. Langmuir isothermal model could accurately describe the adsorption characteristic of DAS adsorption on Pb2+ and Cu2+. The maximum adsorption capacities of DAS on Pb2+ and Cu2+ at 20℃ were 212.77 mg/g and 73.53 mg/g, respectively. The adsorption kinetics of DAS on Pb2+ and Cu2+ fit well with Lagergren's pseudo-second-order kinetic model. The adsorption was a spontaneous and endothermic progress along with entropy production.

Key words: dried alum-sludge from water treatment plant, adsorption, heavy metal ions

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