磷灰石固定水溶性铅离子研究进展

羟基磷灰石与天然磷灰石均能有效地固定水溶性铅离子，１ｇ羟基磷灰石或改性活性天然磷灰石除去水溶液中的铅离子量可以高达８００ｍｇ；其反应机理以磷灰石的溶解与铅的磷酸盐矿物的沉淀为主，伴有表面吸附作用。羟基磷灰石和改性活化天然磷灰石可用于含铅废水的处理，而性能良好的天然磷灰石在对铅污染水体、土壤及废弃物进行原地改良方面具有广阔的前景。

PROGRESS IN THE RESEARCH OF AQUEOUS LEAD IMMOBILIZATION BY APATITE

Aqueous Pb could be immobilized effectively by synthatic hydroxyapatite (HAP) or natural apatite(NAP),1 g HAP or activated NAP might remove Pb as high as 880 mg from aqueous solutions.The reaction mechanisms were dominated by the dissolution of apatite and the precipitation of Pb phosphate minerals,and might be associated with adsorption.HAP or activated NAP may be used to treat Pb bearing waste water,and there is broad prospect of using selected NAP to remediate Pb contaminated water,soils or wasters in situ.