摘要
提出煤炭全生命周期阶段的划分和煤炭生命周期系统清单,基于煤炭全生命周期的5个阶段对徐州地区煤炭环境行为进行了评述,研究分析了煤炭利用阶段4种重金属的排放清单并对土壤环境影响提出针对性改善举措.研究结果表明:煤炭利用阶段重金属环境污染明显.煤、渣、灰中铅(Pb)和砷(As)的潜在生态危害系数均小于40,对土壤环境存在低污染危害;镉(Cd)的潜在危害系数均大于60,近一半的潜在危害系数大于160,对土壤环境存在高污染危害;汞(Hg)的潜在危害系数均高于320,对土壤环境存在很高污染危害.煤、渣、灰的综合污染指数呈现较高的态势,对土壤环境存在潜在高污染危害.
The phase division of the whole life cycle and the life cycle inventory for coal were proposed,the coal environmental behavior in Xuzhou was assessed based on the five phases obtained,the discharge inventory of four heavy metals in coal utilization phase were also analyzed,and the corresponding improvement measures concerning their impact on soil environment were proposed.Results suggest that the environmental pollution of heavy metals is obvious during coal utilization.The potential ecological hazard coefficients of Pb and As in coal,residue and ash are all lower than 40,their environmental impacts on soil belong to slight pollution;the potential ecological risk coefficients of Cd are higher than 60,nearly half of them are higher than 160,the environmental impacts belong to high pollution;the potential ecological risk coefficients are higher than 320 for Hg,the environmental impacts on soil belong to extremely high pollution.The comprehensive pollution indexes in coal,residue and ash are all relatively higher,suggesting higher potential pollution hazard to soil environment.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2016年第2期293-300,共8页
Journal of China University of Mining & Technology
基金
国家科技基础性工作专项(2014FY110800)
国家自然科学基金项目(51374208)
关键词
煤炭
全生命周期
阶段划分
清单分析
环境行为评价
coal
whole life cycle
phase division
inventory analysis
environment behavior assessment
