Adsorption Properties of Modified Phosphogypsum for Pb and Cd Ions in Water
A modified phosphogypsum was obtained by modifying phosphogypsum with hydrochloric acid solution.The adsorption properties of Pb2+and Cd2+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 Pb2+ and Cd2+ in natural river water,artificial lake water,tap water and deionised water by modified phosphogypsum reached 76.2％and 71.8％.
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