岩土工程学报Issue(4)：768-774,7.DOI:10.11779/CJGE201404024
磷矿粉稳定铅污染土的溶出特性研究
Leaching characteristics of lead-contaminated clay stabilized by phosphate rock
摘要
Abstract
An investigation of leaching characteristics of phosphate rock (PR) stabilized Pb-contaminated clay is presented under different initial Pb concentrations and phosphate rock contents via a series of toxicity characteristic leaching procedure (TCLP) at curing time of 1, 3, 7, 14, and 28 days. The designed initial Pb concentrations are 500, 1000, 5000, and 10000 mg/kg (dry soil weight basis), and phosphate rock contents are 5%, 8%, 12%, 15%, 20% and 30%. The results show that Pb concentrations of leachate decrease with the increase of the phosphate rock content and curing time. Furthermore, the variation between the Ca and Pb concentrations of leachate is negatively correlated. The pH values of specimen and leachate are influenced by the initial Pb concentration and increase with the phosphate rock content and curing time. It is found that the variation between Pb and Ca concentrations of leachate is mainly influenced by the initial Pb concentration. A proposed fitting equation based on the value of the initial Pb concentration is adopted to evaluate the variation between the Pb and Ca concentrations of leachate.关键词
磷矿粉/铅污染黏土/TCLP/pH/溶出特性Key words
phosphate rock/lead-contaminated clayed soil/TCLP/pH/leaching characteristic分类
矿业与冶金引用本文复制引用
魏明俐,杜延军,刘松玉,朱晶晶,杨玉玲..磷矿粉稳定铅污染土的溶出特性研究[J].岩土工程学报,2014,(4):768-774,7.基金项目
国家自然科学基金项目（51278100，41330641）；国家863计划（2013AA06A206）；江苏省自然科学基金项目（BK2012022）；江苏省2011年度普通高校研究生科研创新计划项目（CXZZ_0159）；东南大学优秀博士学位论文基金项目 （）
