土壤学报2009，Vol.46Issue(5)：833-839,7.
长江三角洲地区土壤环境质量与修复研究Ⅳ.废旧电子产品拆解场地周边农田土壤酸化和重金属污染特征
SOIL ENVIRONMENT QUALITY AND REMEDIATION IN YANGTZE RIVER DELTA Ⅳ.SOIL ACIDIFICATION AND HEAVY METAL POLLUTION IN FARMLAND SOILS AROUND USED ELECTRONIC DEVICE DISASSEMBLING SITES
摘要
Abstract
Basic properties and heavy metal contents were investigated of paddy soil next to a typical used electronic device disassembling site in the Yangtze River Delta. Results show that its soil pH varied from 3.8 to 4.4, with an average of 4.1, which was obviously lower than that (pH=6.0) obtained during the Second National Soil Survey of China, demonstrating severe soil acidification. Its Cu and Cd content was 8.6 and 31.0 times as much as that, respectively, of Grade ⅡCriteria of the National Standard for Environment Quality. Its synthetic pollution index reached 32.3, indicating serious pollution. Soil pH is a leading factor influencing soil pollution of heavy metals, because lower pH improves activity of heavy metals. The extraction rate of Cu and Cd with 0.1mol L~(-1)HCl was 72.0% and 50.8%, respectively, and their accumulation in the plant of rice was significant, especially in grains, where the content of Cd was 2 times as high as the criterion in the National Hygienic Standards for Grains. Obviously, soil acidification and heavy mental pollution synchronously existed in this farmland, posing potential health risk through the food chain. It is, therefore, essential to take positive measures to control the pollution and remedy the polluted soil.关键词
农田土壤/废旧电子产品拆解/土壤酸化/重金属复合污染Key words
Farmland soils/ Used electronic device disassembling/ Soil acidification/ Compound heavy metal pollution分类
农业科技引用本文复制引用
徐莉,骆永明,滕应,卜元卿,张雪莲,王家嘉,李振高,刘五星..长江三角洲地区土壤环境质量与修复研究Ⅳ.废旧电子产品拆解场地周边农田土壤酸化和重金属污染特征[J].土壤学报,2009,46(5):833-839,7.基金项目
国家自然科学基金重点项目(40432005)、国家重点基础研究发展规划项目(2002CB410810)、中国科学院知识创新工程重要方向项目(KZCX2-YW-404)、创新团队(CXTD-Z2005-4) 和中荷战略科学联盟项目(2006DFA91940)联合资助 （40432005）
