模拟间歇式降水的煤矸石动态淋溶实验研究  

Experimental study on dynamic leaching of coal gangue by imulating intermittent precipitation

作　　者：王建伟 佟智强 高博 谷马军 王振 刘启明 WANG Jianwei;TONG Zhiqiang;GAO Bo;GU Majun;WANG Zhen;LIU Qiming(Mudanjiang Natural Resources Survey Center,China Geological Survey,Mudanjiang 157021,Heilongjiang,China)

机构地区：[1]中国地质调查局牡丹江自然资源综合调查中心,黑龙江牡丹江157021

出　　处：《城市地质》2024年第3期340-344,共5页Urban Geology

基　　金：中国地质调查局项目(DD20230096)资助。

摘　　要：以吉林省某矿区煤矸石为研究对象,利用动态淋溶实验,模拟降水情况,定量预测煤矸石中污染物在大气降水淋溶作用下对环境污染的强度。结果表明:该矿区煤矸石在动态淋滤作用下释放的物质为氯化物、硫酸盐、硝酸盐、铁、镉、锌等,淋滤液pH值为7.39~8.64;高风化度煤矸石相较新鲜煤矸石,溶解释放的无机盐类污染物含量较多;煤矸石中污染物释放浓度随降水量的变化规律呈对数关系,其曲线回归方程可为定量预测煤矸石中污染物在大气降水淋滤作用下对水土环境污染的强度提供一定的参考。Taking coal gangue from a mining area in Jilin Province as the research object,dynamic leaching experiments are made to simulate precipitation conditions and quantitatively predict the intensity of environmental pollution caused by pollutants in coal gangue under atmospheric precipitation leaching.The results show that the substances released from the coal gangue in the mining area under dynamic leaching are chloride,sulfate,nitrate,iron,cadmium,zinc,etc.The pH value of the leachate is 7.39~8.64;High weathering coal gangue has a higher content of inorganic salt pollutants released through dissolution compared to fresh coal gangue;The concentration of pollutants released from coal gangue shows a logarithmic regression with the variation of precipitation.This regression equation can provide reference for quantitatively predicting the intensity of soil and water pollution caused by pollutants in coal gangue under atmospheric precipitation leaching.

关 键 词：煤矸石 淋溶实验 污染物质 释放规律 

分 类 号：TD849.5[矿业工程—煤矿开采]