电感耦合等离子体质谱法测定城市污泥中重金属的活性形态  

Determination of Active Species of Heavy Metals in Sewage Sludge by ICP-MS

作　　者：田冬梅[1] 邓桂春[2] 臧树良[2] 宋学君[1] 武士威[1] 

机构地区：[1]沈阳师范大学化学与生命科学学院,辽宁沈阳110034 [2]辽宁大学化学科学与工程学院,辽宁沈阳110036

出　　处：《光谱学与光谱分析》2006年第12期2330-2333,共4页Spectroscopy and Spectral Analysis

基　　金：辽宁省自然科学基金项目(972088)资助

摘　　要：以沈阳北部、满堂河、仙女河三个污水处理厂的污泥为研究对象,选择水、醋酸和不同极性的有机溶剂对其进行浸提分离,采用ICP-MS测定了污泥中主要污染的重金属元素各活性形态的含量,并探讨了Cr,Cu,Zn,Cd和Pb随环境条件的改变其活性形态含量的变化规律及其影响因素。结果表明:城市污泥中重金属的醋酸浸提态含量较高,水溶态含量较低,二者随时间和温度条件的变化呈一致的规律性,有机浸提态重金属的含量与溶剂极性大小呈正相关性。醋酸浸提态重金属在迁移转化过程中具有较大活性,同一形态重金属的活性次序为:水溶态Zn>Cu>Cd>Pb>Cr,醋酸浸提态Cd>Cr>Cu>Zn>Pb,有机浸提态Pb>Cd>Cr>Cu>Zn。Sewage sludge samples for the research from the sewage disposal plants of the north, Mantang River and Xiannu River in Shenyang were extracted and separated by H2O, HAc and organic solvents of different polarities. The active species of CA, Pb, Cu, Zn and Cr existing in the sewage sludge were determined by ICP-MS, and the regularity and influential factors were studied under the alternation of environmental conditions. The results showed that the content of acid-soluble heavy metals was more than that of water-soluble ones, and both had coincident regularity under the alternation of time and temperature; the con tent of the organic solvents was positively correlated to the solvent polarity. The acid-soluble heavy metals were more active during the course of transforming, and the activity sequence of heavy metals in the same species was： water-soluble Zn〉Cu〉Cd〉 Pb〉Cr, aci＆soluble Cd〉Cr〉Cu〉Zn〉Pb, and organic-soluble Pb〉Cd〉Cr〉Cu〉Zn.

关 键 词：电感耦合等离子体质谱 城市污泥 重金属 活性形态 

分 类 号：O657.3[理学—分析化学] X132[理学—化学]