IN-SITU LEAD IMMOBILIZATION BY APATITE
IN-SITU LEAD IMMOBILIZATION BY APATITE
复制标题
DOI：
10.1021/es00046a007
复制
发表时间：
1993-09-01
影响因子：
11.4
通讯作者：
RYAN, JA
中科院分区：
文献类型：
--
作者：
MA, QY;TRAINA, SJ;RYAN, JA
铅污染由于其对人类健康的影响而受到环境关注。本研究的目的是开发一种利用磷灰石原位吸附污染土壤和废物中铅的技术。羟基磷灰石[Ca 10（PO 4）6（OH）2]与水溶液中的铅，树脂交换铅，铅污染的土壤材料。还测试了天然磷灰石衰减Pb的有效性。羟基磷灰石减少5-500毫克L-1至0.18019.7马克杯L-1的初始铅浓度。在铅污染的土壤材料中的水铅减少从2273到36杯L-1与羟基磷灰石反应后。我们推测Pb是通过羟基磷灰石的溶解和羟基焦吗啡石[Pb 10（PO 4）6（OH）2]的沉淀来固定的。从水溶液中，交换树脂，和铅污染的土壤材料的有效去除铅表明，磷灰石具有潜在的原位重金属铅污染的土壤和废物。
Lead contamination is of environmental concern due to its effect on human health. The purpose of this study was to develop a technology to immobilize Pb in situ in contaminated soils and wastes using apatite. Hydroxyapatite [Ca10(PO4)6(OH)2] was reacted with aqueous Pb, resin-exchangeable Pb, and Pb-contaminated soil material. The effectiveness of natural apatite to attenuate Pb was also tested. Hydroxyapatite reduced initial Pb concentrations of 5-500 mg L-1 to 0.18019.7 mug L-1. Aqueous Pb in Pb-contaminated soil materials was reduced from 2273 to 36 mug L-1 after reaction with hydroxyapatite. We hypothesize that Pb was immobilized by dissolution of hydroxyapatite and precipitation of hydroxypyromorphite [Pb10(PO4)6(OH)2]. The effective removal of Pb from aqueous solution, exchange resin, and Pb-contaminated soil material suggests that apatite has the potential to immobilize Pb in situ in Pb-contaminated soils and wastes.