尾矿中金属元素淋溶释放规律及污染评价  

Leaching release rule of metal elements in tailings and pollution evaluation

作　　者：李智涵 甄志磊 赵林婷 李明秀 LI Zhihan;ZHEN Zhilei;ZHAO Linting;LI Mingxiu(College of Urban and Rural Construction,Shanxi Agricultural University,Taigu 030800,China)

机构地区：[1]山西农业大学城乡建设学院,山西太谷030800

出　　处：《工业用水与废水》2022年第4期45-50,共6页Industrial Water & Wastewater

基　　金：山西省高等学校科技创新项目(2020L0143);山西农业大学科技创新基金项目(2020QC06,2017YJ04,2018002)。

摘　　要：通过淋溶试验,探究铁尾矿和赤泥中多种金属元素的释放行为,分析渗滤液中各金属离子浓度随时间的变化规律,并对2种尾矿渗滤液的污染情况进行评价。发现渗滤液中各离子浓度随着淋溶时间延长逐渐减小,最终趋于稳定。铁尾矿渗滤液中Fe、Al、As离子浓度超标,赤泥渗滤液中Al、As、Cu、Cr、Cd离子浓度超标。淋溶作用下渗滤液的金属离子污染指数大大降低,铁尾矿渗滤液在淋溶12 d时基本达到清洁状态,而赤泥渗滤液在淋溶30 d时仍处于重度污染状态。Through tailings leaching test,the release behavior of various elements in iron tailings and red mud were explored,the variation rules of mental ions concentrations in the leachate along with time were analyzed;besides,the pollution situation of two kinds of tailings leachate were evaluated.It was found that,the concentration of metal ions in the leachate decreased gradually with the increase of leaching time,and eventually stabilized.The concentrations of Fe,Al,As ions in the leachate of iron tailings,the concentrations of Al,As,Cu,Cr and Cd ions in the red mud,exceeded the standard.The mental ions pollution index of the leachate was greatly reduced under leaching,the iron tailings leachate basically reached a clean state on the 12^(th) day,however;the red mud leachate was still in a heavily polluted status on the 30^(th) day.

关 键 词：尾矿 淋溶作用 金属元素 释放规律 污染评价 

分 类 号：X703.1[环境科学与工程—环境工程] X753