摘要
为分析恒源矿矸石堆积区重金属污染风险及其迁移机制,文章在现场取样的基础上对样本进行重金属含量、扫描电镜和能谱测试,并采用多种评价方法对测试结果进行分析,同时采用COMSOL数值模拟和实验室试验相结合的方法阐述了矸石内部重金属浸出和迁移机制。研究表明:所有样本中重金属含量均未超标,矸石和土壤中Cd的单个污染物生态风险程度为中等,总生态风险程度为轻微;根据矸石堆积区周边样品与空白对照组样品的对比结果可知矸石对周围生态环境造成了一定的影响;随着时间的推移,Cd浓度最大值和均值分别呈现不同的变化规律,而含水层的活跃性是影响Cd迁移净化的主控因素;矸石内部存在的原生裂隙和接触裂隙为矸石风化及重金属浸出迁移提供通道。
In order to analyze the pollution risk and migration mechanism of heavy metals from gangue stacking area in Hengyuan coal mine,based on on-site sampling,the article conducts heavy metal content,scanning electron microscopy and energy dispersive spectrometer tests on the samples,and used a variety of evaluation methods to analyze the test results.At the same time,the method of combining COMSOL numerical simulation and laboratory experiment was used to illustrate the leaching and migration mechanism of heavy metals from gangue stacking area.The research results showed that the content of heavy metals in all samples did not exceed the standard,the single pollutant ecological risk of Cd in gangue and soil was medium,and the total ecological risk was slight.According to the comparison results between the samples around the gangue stacking area and the blank control group,it can be seen that gangue has a certain influence on the surrounding ecological environment.With the passage of time,the maximum and average values of Cd concentration show different changes,and the activity of the aquifer was the main controlling factor that affects the migration and purification of Cd.The initial fissures and contact fissures in the gangue provide channels for the weathering of the gangue and the leaching and migration of heavy metals.
作者
毕卫华
王彦君
刘恒凤
庞顺
何建国
王新富
BI Weihua;WANG Yanjun;LIU Hengfeng;PANG Shun;HE Jianguo;WANG Xinfu(Anhui Hengyuan Coal&Electric Co.,Ltd.,Suzhou 23400,China;Jiangsu Design Institute of Geology for Mineral Resources(Testing Center of China National Administration of Coal Geology),Xuzhou 221006,China;Key Laboratory of Mineral Resource in Coal Measures,China National Administration of Coal Geology,Xuzhou 221006,China;China University of Mining and Technology,Xuzhou 221116,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2021年第S02期331-337,共7页
Environmental Science & Technology
基金
中国煤炭地质总局煤系矿产资源重点实验室开放基金项目(KFKT-2020-1)
中国煤炭地质总局科研资助项目(ZMKJ-2019-J16,ZMKJ-2020-J04-4)
关键词
固体废弃物
生态健康
风险评价
数值模拟
迁移机制
solid waste
ecological health
risk assessment
numerical simulation
migration mechanism
作者简介
毕卫华(1982-),男,工程师,硕士,主要从事地质环境方面的研究,(电子信箱)64860288@qq.com;通讯作者:王彦君,女,教授级高级工程师,硕士,主要从事矿区环境治理方面的研究,(电子信箱)1262455520@qq.com。
