摘要
渗滤液作为渣堆对周边水土的主要污染源,是污染场地原位风险管控的关键对象。云南某历史遗留冶炼废渣堆出现了渗滤液产生量少、空间分布位置有限的特殊现象。为研究该冶炼废渣堆渗滤液产生的控制条件和影响因素,基于详细勘察和野外现场调查试验结果,构建了渣体包气带水文地质概念模型,并结合HYDRUS软件分析了不同条件下渣体包气带的水分变化。结果表明:该厚层渣体包气带水分运移深度有限,正常降雨条件下该渣体产生渗滤液的临界深度为8.8m;暴雨条件下熔炼渣相较于石膏渣和生活垃圾更易产生渗滤液;渣体包气带越厚、初始体积含水率越低、渣体物质组成及其结构越复杂、覆土层越厚的条件下,渣体越难产生渗滤液。该研究结果对我国类似冶炼废渣堆原位风险管控处置具有重要的参考价值。
As a central source of pollution to the surrounding water and soil,leachate is also a key object of in-situ risk control of contaminated sites.A smelting waste slag pile in Yunnan shows a special phenome-non of low leachate generation and limited distribution location.In order to study the control conditions and influencing factors of leachate generation in this slag pile,based on the results of detailed survey and inves-tigation tests,this paper proposes a hydrogeological conceptual model and a numerical model combined with HYDRUS software to analyze the moisture change of slag body aeration zone under different conditions.The results are as follows:the depth of water transport in the thick slag envelope is limited,and the thick-ness threshold for slag leachate generation is 8.8m;smelting slag is more likely to generate leachate than gypsum slag and domestic waste under heavy rainfall conditions;while it is more difficult to generate leachate under non-storm intensity,the thicker the slag envelope,the lower initial volumetric water con-tent,the more complex material composition of the slag and its structure,and the thicker overburden layer.The influencing factors and analytical ideas proposed in the study have some reference value for the dispo-sal of similar smelting waste piles in China.
作者
乐文喜
王涛
王鹏程
刘伟
孔德颂
周开宇
田俊
陈植华
LE Wenxi;WANG Tao;WANG Pengcheng;LIU Wei;KONG Desong;ZHOU Kaiyu;TIAN Jun;CHEN Zhihua(School of Environmental Studies,China University of Geosciences(Wuhan),Wuhan 430078,China;Southwest Copper Branch of Yunnan Copper Co.,Ltd.,Kunming650102,China)
出处
《安全与环境工程》
CAS
CSCD
北大核心
2022年第3期187-198,共12页
Safety and Environmental Engineering
基金
校企联合科技攻关项目(XNTY-2019-0112-科开-YWWB)。
