固体废弃物路基填筑材料的重金属污染特性研究进展  

Pollution Characteristics of Heavy Metals in Solid Waste Subgrade Filling Materials

作　　者：杜倩卉 付伟[2] 张军辉 唐强 顾凡 DU Qianhui;FU Wei;ZHANG Junhui;TANG Qiang;GU Fan(School of Traffic&Transportation Engineering,Changsha University of Science&Technology,Changsha,Hunan 410114,China;CCCC Second Highway Consultants Co.,Ltd.,Wuhan,Hubei 430056,China;School of Rail Transportation,Soochow University,Suzhou,Jiangsu 215141,China)

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410114 [2]中交第二公路勘察设计研究院有限公司,湖北武汉430056 [3]苏州大学轨道交通学院,江苏苏州215141

出　　处：《中外公路》2024年第3期1-18,共18页Journal of China & Foreign Highway

基　　金：国家重点研发计划项目(编号:2021YFB2600900);中交建集团青年科技创新项目(编号:2021-ZJKJ-QNCX16);长沙理工大学研究生创新项目(编号:CX2021SS14)。

摘　　要：路域固体废弃物用作路基填筑是绿色低碳公路建设的一种重要手段,然而多数固体废弃物均不同程度地含有重金属污染物,在降雨入渗、地下水浸泡等复杂环境作用下,重金属会被释放,若处理不当将对周边土壤和地下水造成污染。该文综述了固废材料在路基工程中的综合利用、固废中重金属的浸出行为、迁移研究以及固废重金属的防控处理4个方面的研究现状。发现固体废弃物在路基工程中有广泛应用,但对固废路基的重金属污染特性的研究鲜有报道,重金属在路基中的长期浸出行为和迁移机制尚不明确。为了对固废路基的污染性能进行评估和调控,需要进一步研究污染物在路基结构中的迁移规律。通过对固废中污染物的防控处理技术进行总结对比,发现地聚合物在处置固废中有害重金属方面具有广阔的应用前景。Using solid waste in the road engineering field for subgrade filling is an important approach for building green and low-carbon emission roads.However,most solid waste contains heavy metal pollutants to varying degrees,and heavy metals will be released under complex environments including rainfall infiltration and groundwater immersion,thereby causing pollution to the surrounding soil and groundwater if not handled properly.This paper reviewed the current status of research on four aspects,including the comprehensive use of solid waste materials in subgrade engineering,the leaching and migration behaviors of heavy metals in solid waste,and the prevention and control treatment of heavy metals in solid waste.It is found that solid waste has a wide range of applications in subgrade engineering,but little research has been focused on the pollution characteristics of heavy metals in subgrade containing solid waste,and the long-term leaching behavior and migration mechanism of heavy metals in subgrade are still unclear.In order to assess and regulate the pollution performance of solid waste,the migration pattern of pollutants in the subgrade structure needs to be further investigated.By summarizing and comparing the prevention and control treatment technologies for pollutants in solid waste,it is found that geopolymers have broad application prospects in the disposal of hazardous heavy metals in solid waste.

关 键 词：路基工程 固体废弃物 综述 重金属浸出毒性 防控处置 

分 类 号：U416.1[交通运输工程—道路与铁道工程]