用膨润土处理含铅离子废水的研究

Treatment of wastewater by bentonite containing Pb^(2+)

用膨润土对模拟含Pb2+离子的废水进行了试验研究。结果表明:膨润土是一种有效的吸附剂,其在粒径范围为200-300目,温度30℃左右,用量每1L含铅废水(50mg/l)为3g,pH值在大于7中性至碱性,振荡时间为45min的实验条件下,对废水中Pb2+去除效率高于97%。

The effect of absorbing the Pb2+ from wastewater with bentonite is discussed.The experiment results show that the bentonite is a kind of effective absorbents with particle size 200—300 items and temperature about 30℃.With about 3g of it in a liter of the lead waste water(50mg/l) the pH value is higher than 7 which locates between neutralities and alkalinity.Under the experiment condition of 45min of oscillation the Pb2+ elimination efficiency is higher than 97%.