气候及植被条件对尾矿库重金属Cu^(2+)迁移影响分析  

Analysis of the Influence of Climate and Vegetation Conditions on the Migration of Heavy Metal Cu^(2+)in Tailings Pond

作　　者：郝喆 陈红丹 滕达 王晓明 张倩 HAO Zhe;CHEN Hong-dan;TENG Da;WANG Xiao-ming;ZHANG Qian(College of Environmental Sciences,Liaoning University,Shenyang 110036,China;Nonferrous Geological Exploration and Research Institute Limited Liability Company,Shenyang 110013,China)

机构地区：[1]辽宁大学环境学院,辽宁沈阳110036 [2]辽宁有色勘察研究院有限责任公司,辽宁沈阳110013

出　　处：《辽宁大学学报（自然科学版）》2022年第3期266-273,共8页Journal of Liaoning University：Natural Sciences Edition

基　　金：辽宁省科技计划项目(2019JH8/10300107,2019JH8/10300105,2020JH2/10300100);辽宁省百千万人才资助项目(辽百千万立项[2015]33号);辽宁省自然科学基金项目(20180550192)。

摘　　要：尾矿库的重金属污染物除了随地下水迁移,还会受到气候、植被等外界因素的干扰.本文考虑气候(降雨、蒸发)及植被(植物蒸腾)条件与地下水的耦合作用,应用Geostudio软件的SEEP/W、VADOSE/W和CTRAN/W模块,对比模拟大型尾矿库的典型重金属污染物Cu^(2+)的迁移规律.结果表明,植物蒸腾与地下水耦合作用会降低重金属Cu^(2+)的浓度,对尾矿库土壤中Cu^(2+)有降解作用和去除效果;气候及植被条件与地下水耦合作用不同程度地影响重金属污染物的浓度、重金属的迁移距离和平均迁移速度;气候及植被条件与地下水耦合作用对尾矿库重金属Cu^(2+)浓度、流体系统质量、迁移距离和平均迁移速度的影响程度为气候条件>植被条件>气候条件+植被条件.研究结果提高了尾矿库重金属污染扩散计算精度,对环境污染分析与评价有较大参考价值.In addition to moving with groundwater,the heavy metal pollutants in tailings ponds may also be affected by climate,vegetation and other external factors.In this paper,considering the coupling effect of climate(rainfall,evaporation)and vegetation(plant transpiration)conditions and groundwater,the SEEP/W,VADOSE/W and CTRAN/W modules of Geostudio software were used to compare and simulate the migration rules of typical heavy metal pollutant Cu^(2+)of large tailings ponds.The results show that the coupling effect of plant transpiration and groundwater can reduce the migration concentration of heavy metal Cu^(2+)and degrade and remove Cu^(2+)from the soil of tailings pond.The coupling of climate and vegetation with groundwater affects the concentration,distance and average velocity of heavy metal pollutants in different degrees.The order of the influence degree of climate and vegetation conditions and groundwater coupling effect on the heavy metal Cu^(2+)migration concentration,fluid system quality,migration distance and average migration velocity of tailings pond is as follows:climate>vegetation>climate and vegetation.The research results improve the calculation accuracy of heavy metal pollution diffusion in tailings pond and have great reference value for environmental pollution analysis and evaluation.

关 键 词：尾矿库 气候条件 植被条件 Cu^(2+)迁移 数值模拟 Geostudio软件 

分 类 号：X756[环境科学与工程—环境工程]