凹凸棒石吸附铅的性能及含铅废水处理研究

Study on the Performance of Adsorbing Lead by Attapulgite and Treating the Leacled Waste Water

采用经活化处理的凹凸棒石粘土,用静态法研究了凹凸棒石粘土吸附铅的吸附酸度、吸附速率、吸附温度和吸附反应热焓以及吸附容量等性能。通过大量实验确定了凹凸棒石粘土吸附铅的最佳条件,并用静态法和交换柱法处理了不同浓度的模拟含铅废水。结果表明,两种不同方法处理效果基本一致,铅的去除率在99%以上,排放液中铅的残余浓度均小于1 mg/L,达到了国家排放标准。选用凹凸棒石粘土对铅、铬、镉等重金属离子的吸附选择性实验,以期为环境污染的控制和治理,提供实验依据。

This paper studies the performances of adsorbing the lead by attapulgite clay, including the acidity, adsorption rate, adsorptive reaction heat content, and adsorption capacity. The optimum condition for adsorbing lead has been determined. It also gets a excellent condition for simulation waste water containing Lead is treated by dynamic method and exchange pole method. The removing rate is above 99%. The residual concentration of lead in discharge waste water reaches the state specified discharge standard.