安徽铜陵新桥矿区土壤Pb的富集特征及Pb同位素源解析  

Pb Enrichment and Pb Isotope Source Appointment of Soil in the Xinqiao Mining Area,Tongling,Anhui

作　　者：李湘凌[1] 周涛发[1] 袁峰[1] 王银泉[1] 孙缨泽 

机构地区：[1]合肥工业大学资源与环境工程学院,合肥230009

出　　处：《地质论评》2015年第6期1347-1358,共12页Geological Review

基　　金：国家环保部公益性行业科研专项经费项目(编号201009041)的成果

摘　　要：本文研究了安徽铜陵新桥矿区土壤中的Pb富集特征,并采用Pb同位素示踪法进行了Pb来源解析。结果表明,研究区多数0~20cm表层土壤Pb发生了中等以上的富集,20cm以下深层土壤的Pb无明显富集。Pb同位素组成分析表明,土壤中Pb主要来源于矿区石英二长闪长岩、花岗岩闪长岩等岩石风化的自然源Pb以及矿山黄铁矿、黄铜矿、方铅矿等矿石构成的矿石源Pb所组成的二元Pb。其中,表层土壤73.6%~98.7%的Pb来自于矿山开采的矿石,深层土壤中61.4%~76.1%的Pb来源于侵入岩的风化。In this paper,we studied the enrichment characteristics of lead in soil within Xinqiao sulfide mining area,Anhui province. The sources of the metal Pb in the soils were traced using Pb isotopic compositions. The results showed that Pb was enriched in most of the topsoil( 0 ~ 20cm) moderately,and not enriched in the deep soil( below 20cm) obviously. Pb isotopic compositions of the soil suggested that Pb of the soil was a binary mixture and was contributed from both natural and anthropogenic processes. The naturally sourced Pb might be contributed from both weathering of the quartz monzonite and granodiorite,and most of the anthropogenic Pb came from pyrite,chalcopyrite and galena ores in the mining area. In topsoil,the anthropogenic Pb varied from 73. 6% to 98. 7%,and in the deep soil there were 61. 4% ~ 76. 1% naturally sourced Pb.

关 键 词：PB同位素 源解析 铜陵 

分 类 号：X53[环境科学与工程—环境工程] X753