摘要
重金属废水的污染日益严重,寻找廉价高效的吸附剂是经济地处理重金属废水的关键.试验选择活性污泥为吸附剂,考察其对重金属离子Cu2+、Zn2+和Cd2+的吸附性能.实验结果表明,活性污泥对3种重金属离子都有很强的吸附能力,且吸附很快,前4 min时的去除率和吸附量上升最快;在常温范围内,温度对活性污泥吸附金属的影响并不显著,而体系pH值和吸附剂投加量的影响较为重要;活性污泥对3种重金属离子的吸附均符合Langmuir模型.
The adsorption of activated sludge on the heavy metal iron （Cu^2＋, Zn^2＋ and Cd^2＋） is studied in this paper. The results show that the adsorption speed of heavy metal irons with activated sludge is rapid. The removal rate and adsorption capability of Cu^2＋, Zn^2＋ and Cd^2＋ rise rapidly in 4 minutes. In arang of regular temperature, the influence of temperature on the adsorption effect is minimal, and the influence of initial pH and the dosage of sorbent are important. The adsorption isotherm of Cu^2＋, Zn^2＋ and Cd^2＋ with activated sludge sorbent fits for Langmuir equation.
出处
《湖南工程学院学报（自然科学版）》
2009年第2期64-66,89,共4页
Journal of Hunan Institute of Engineering(Natural Science Edition)
关键词
剩余活性污泥
重金属
吸附
activated sludge
heavy metal iron
adsorption
