掺绿砂改良土中铅离子浸出浓度影响因素分析  

Lead ion leaching concentration influence factors analysis of improved soil mixed with green sand

作　　者：盘霞[1] 黄强 PAN Xia;HUANG Qiang(Guangxi Transport Vocational and Technical College, Nanning 530023, China;Nanning Investigation and Design Institute of Pearl River Water Resources Commission, Nanning 530007, China)

机构地区：[1]广西交通职业技术学院,广西南宁530023 [2]广西珠委南宁勘测设计院,广西南宁530007

出　　处：《广西水利水电》2018年第6期7-8,32,共3页Guangxi Water Resources & Hydropower Engineering

基　　金：广西高校中青年教师基础能力提升项目:广西高速铁路红粘土路基填筑性能改良试验研究(KY2016YB670)

摘　　要：利用不同pH值的渗滤液对掺绿砂改良土进行注渗试验,通过试验数据分析,得出改良土中铅离子的浸出浓度受渗滤液p H值、掺砂率和浸出时间等因素影响的结论,其中渗滤液pH值越低,改良土中铅离子浸出浓度越大,当掺绿砂率为30%～40%时铅离子浸出浓度最小,铅离子浸出浓度随时间变化呈指数函数衰减。Injection permeability test of green sand improved soil was conducted with leachate of various pH values.In accordance with the analysis of testing results,it is concluded the lead ion leaching concentration of improved soil is influenced by leachate pH value,sand mixing proportion and leaching time.The lower the leachate pH value,the higher the lead ion leaching concentration is.The leaching concentration is the minimum at green sand mixing proportion of 30%-40%,and decays exponentially over time.

关 键 词：掺绿砂改良土 注渗试验 铅离子 浸出浓度 

分 类 号：X53[环境科学与工程—环境工程]