钙
化学
磷酸盐
水溶液
无机化学
溶解
金属
降水
核化学
生物化学
有机化学
物理
气象学
作者
Shigeru Sugiyama,Takuya Ichii,Masayoshi Fujisawa,Katsuhiro Kawashiro,Tahei Tomida,Naoya Shigemoto,Hiromu Hayashi
标识
DOI:10.1016/s0021-9797(02)00211-4
摘要
This study examines the possibilities for removing heavy metal cations from water with calcium phosphate, calcium hydrogen phosphate, and calcium dihydrogen phosphate at 293 K. It was reported that immobilization of aqueous heavy metal cations, which is known to be one of the characteristic properties of calcium hydroxyapatite, proceeded favorably with these phosphates. Calcium phosphate, calcium hydrogen phosphate, and calcium dihydrogen phosphate could favorably remove Pb2+ from aqueous solution. Calcium hydrogen phosphate also removed aqueous Cu2+, Co2+, and Cd2+, whereas these cations were not immobilized by calcium phosphate and calcium dihydrogen phosphate. A contribution of the dissolution–precipitation mechanism to immobilization with these phosphates is suggested.
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