广西某历史遗留矿区铅污染特征及风险评价  

Characteristics and Risk Assessment of Lead Pollution in a Historical Mining Area in Guangxi

作　　者：叶照金 YE Zhaojin(Chongqing Casin Environmental Resources Co.,Ltd.,Chongqing 400023,China)

机构地区：[1]重庆财信环境资源股份有限公司,重庆400023

出　　处：《有色金属设计》2023年第3期130-136,共7页Nonferrous Metals Design

摘　　要：广西某历史遗留矿区选矿厂建设于20世纪70年代,初期铅锌矿浮选工艺落后,选矿产生的废水无序排放导致周边水体重金属超标,存在严重环境与安全隐患。对选矿厂地块土壤及地下水重金属铅进行调查,通过专业布点法采集样品,并应用单因子指数法、ALM模型评价法对选矿厂土壤重金属及地下水铅污染特征进行分析及评估。结果表明:调查范围内,地块土壤Pb含量为人体的风险不可接受,污染程度主要为中度、轻度和轻微度,且主要集中在垂向0~2 m表层,最大污染深度6 m。地下水中单因子指数区间为0.000 8~0.557 0,均<1,表明地下水对人体的健康风险在可接受范围内,地下水环境风险可控。The concentrator in a historical mining area in Guangxi was built in the 1970s.In the early stage,the flotation process of lead-zinc ore was backward,and the disorderly discharge of wastewater generated by beneficiation led to excessive heavy metals in the surrounding water,resulting in serious environmental and safety hazards.The heavy metal lead in the soil and groundwater of the concentrator was investigated,and the samples were collected by professional distribution method,and the single factor index method and ALM model evaluation method were used to analyze and evaluate the heavy metals in the soil and the lead pollution characteristics of groundwater of the concentrator.The results show that within the scope of the investigation,the Pb content in the soil was unacceptable for the human body,and the pollution was mainly moderate,mild and slight degrees,and mainly concentrated in the vertical 0~2 m surface layer,with the maximum pollution depth of 6 m.The range of the single factor index in groundwater is 0.0008~0.5570,all<1,indicating that the health risk of groundwater to the human body is within an acceptable range and the environmental risk of groundwater is controllable.

关 键 词：历史遗留矿区 选矿厂 土壤及地下水 单因子指数评价 ALM模型 

分 类 号：X53[环境科学与工程—环境工程]