改性磷石膏对水中铅、镉离子吸附性能研究

Adsorption Properties of Modified Phosphogypsum for Pb and Cd Ions in Water

以盐酸溶液对磷石膏进行改性,得到了一种改性磷石膏。研究了改性磷石膏中Pb^(2+)和Cd^(2+)的吸附性能。优化条件为:改性磷石膏的投加量为1.0 g,吸附pH为5.0,吸附时间分别为40、60 min,吸附温度分别为40、50℃。优化条件下,改性磷石膏对天然河水、人工湖水、自来水、去离子水中Pb^(2+)和Cd^(2+)的去除率达76.2%和71.8%。

A modified phosphogypsum was obtained by modifying phosphogypsum with hydrochloric acid solution.The adsorption properties of Pb^(2+)and Cd^(2+)in modified phosphogypsum were investigated.The optimised conditions were:the dosage of modified phosphogypsum was 1.0 g,the adsorption pH was 5.0,the adsorption time was 40 and 60 min,and the adsorption temperature was 40 and 50℃,respectively.Under the optimised conditions,the removal rates of Pb^(2+)and Cd^(2+)in natural river water,artificial lake water,tap water and deionised water by modified phosphogypsum reached 76.2%and 71.8%.