不同比例羟基磷灰石对沉积物中重金属形态影响的比较  

Comparative Studies on Effects of Different Dosages of Hydroxyapatite on Species Transformation Characreristics of Heavy Metals in the Sediments

作　　者：王晓丽[1] 杜显元[2] 王婷[2] 刘建林[2] 李鱼[2] 

机构地区：[1]吉林大学植物科学学院,长春130062 [2]华北电力大学能源与环境研究中心,北京102206

出　　处：《吉林大学学报（理学版）》2010年第4期707-712,共6页Journal of Jilin University:Science Edition

基　　金：国家重点基础研究发展计划973项目基金(批准号:2004CB418501);吉林大学引进人才科研启动基金(批准号:4305050102H3)

摘　　要：通过考察模拟污染沉积物中重金属的形态分布规律,研究不同比例的羟基磷灰石对污染沉积物中不同重金属的固定化效果.结果表明:羟基磷灰石掺杂后重金属残渣态的质量分数变化不大,但随掺杂比例的加大,Pb,Cd,Zn由可交换态向其他结合态转化的质量分数增加,Cu由碳酸盐结合态向其他结合态转化的质量分数增加.羟基磷灰石的掺杂导致可交换态和碳酸盐结合态Pb的质量分数之和下降,当掺杂物质的量比为6时,质量分数为25.5%～36.1%的可交换态和碳酸盐结合态的Pb转化为其他较稳定的结合态,但对Cd,Cu,Zn的影响较Pb小.Effects of different dosages of hydroxyapatite on the immobilization of heavy metals were studied via investigating the species distribution of heavy metals in the metal-spiked sediments.The results indicate that the percentage of the heavy metals existed as residues was almost invariable,but the mass percentages of Pb,Cd and Zn tending to transform from exchangeable phase to other phases,as well as the mass percentage of Cu tending to transform from carbonate phase to other phases increased along with the increasing of applied hydroxyapatite.The percentage of Pb existed as exchangeable and carbonated phases obviously decreased with less effects on the percentages of Cd,Cu and Zn as the results of hydroxyapatite doped.25.5% ～ 36.1% of Pb existed as exchangeable and carbonated phases could transform to other relatively stable phases when the ratio of P：M was 6.

关 键 词：羟基磷灰石 沉积物 重金属 形态转化 

分 类 号：X132[环境科学与工程—环境科学]