某矿区煤矸石山重金属形态分布及生态风险评价  

Speciation distribution and Ecological Risk Assessment of Heavy Metals in Coal Gangue Hill of a Mining Area

作　　者：李金辉 王平 何超[2] 张泽敏 丁薇 Li Jinhui;Wang Ping;He Chao;Zhang Zemin;Ding Wei(School of Chemistry and Materials Engineering,Liupanshui Normal University,Liupanshui 553004,Guizhou,China;Academic Affairs Office,Liupanshui Normal University,Liupanshui 553004,Guizhou,China)

机构地区：[1]六盘水师范学院化学与材料工程学院,贵州六盘水553004 [2]六盘水师范学院教务处,贵州六盘水553004

出　　处：《云南化工》2022年第10期75-79,共5页Yunnan Chemical Technology

基　　金：贵州省教育厅青年科技人才成长项目(黔教合KY字[2018]372);六盘水师范学院实验教学示范中心(LPSSYsyjxsfzx201701);六盘水煤炭产业链环境污染与控制重点实验室(52020-2018-03-05);贵州省煤炭洁净利用重点实验室(黔科合平台人才[2020]2001)。

摘　　要：采用湿法消解和改进BCR连续提取法对某矿区煤矸石山Cu、Ni、Pb、Cd、Cr、Zn、Mn的总量及形态分布开展了分析,并以地累积指数法和潜在生态危害指数法对煤矸石山重金属污染程度和生态风险进行了评价。结果表明:煤矸石山7种重金属含量顺序为Mn>Cu>Zn>Cr>Ni>Pb>Cd;Ni、Pb、Cd、Cr主要以稳定态存在,生物有效性较差;Cu、Zn、Mn生物有效性较高。地累积指数法表明,污染元素主要为Cu(Cu的污染程度为偏中度污染);潜在生态危害指数法单因素风险与多种重金属风险均为低风险。The total amount and form distribution of Cu、Ni、Pb、Cd、Cr、Zn and Mn in coal gangue in a mining area of Panzhou city are analyzed by wet digestion and improved BCR continuous extraction method.The pollution degree and ecological risk of heavy metals in coal gangue are evaluated by geoaccumulation index method and potential ecological hazard index method.Results show that the order of the contents of seven heavy metals in coal gangue is Mn>Cu>Zn>Cr>Ni>Pb>Cd.Ni、Pb、Cd and Cr mainly exist in stable state and in which the bioavailability is poor,however Cu、Zn and Mn have high bioavailability.The geoaccumulation index method shows that Cu is the main pollution element,which leads to the moderate pollution.In addition,single factor risk and multiple heavy metal risks of potential ecological hazard index method are low risks.

关 键 词：煤矸石 重金属 形态分布 地累积指数 潜在生态危害指数 

分 类 号：X826[环境科学与工程—环境工程]