岩土工程学报2026，Vol.48Issue(3)：599-607,9.DOI:10.11779/CJGE20250003
铅污染废弃黏土在水热条件下的固化/稳定化规律和机理探究
Exploration of solidification/stabilization law and mechanism of lead-contaminated abandoned clay under hydrothermal conditions
摘要
Abstract
Lead is a common heavy metal pollutant in abandoned clay.Stabilizing lead-contaminated waste clay through hydrothermal technology is expected to achieve high-level stabilization of lead ions.This paper carries out experiments on the solidification/stabilization of waste clay with different lead contents under the hydrothermal condition(200℃,12h),and studies the stabilization mechanism of Pb2+and its influence on the compressive strength,bulk density,water absorption and other properties of the solidified specimens.The results show that the stability rate of Pb2+over 99%,and its stabilization is mainly achieved through the generation of compounds such as CaPb(OH)4,Pb(OH)2,PbO.The hydrothermal reaction greatly improves the strength of the specimen,which is about three times higher than that of curing at room temperature for 28 days.But lead slightly reduces the strength of the specimen.This may be related to the inhibition of Pb2+on the formation of tobermorite and xonotlite.关键词
铅含量/水热条件/废弃黏土/固化/稳定化Key words
lead content/hydrothermal conditions/abandoned clay/solidification/stabilization分类
建筑与水利引用本文复制引用
郁灵芝,陈萍,沈云扬,万怡灵,侯坤,杨奕健..铅污染废弃黏土在水热条件下的固化/稳定化规律和机理探究[J].岩土工程学报,2026,48(3):599-607,9.基金项目
国家自然科学基金面上项目(42377173)This work was supported by the National Natural Science Foundation of China(42377173). （42377173）
