摘要
以葫芦岛锌厂附近的土壤为对象,研究了2005、2011和2021年3个时期锌厂周围土壤中汞、砷质量分数的动态变化,并用单因子指数法和综合污染指数法对汞、砷污染进行了评价。结果表明:除2005年Hg平均质量分数、2011年和2021年As平均质量分数低于其风险管控值之外,3个时期土壤中Hg、As平均质量分数均超过了辽宁省土壤背景值和农用地土壤污染风险筛选值和管控值;整体来看,2005—2021年土壤中Hg质量分数有所增加,污染情况比As严重,As质量分数显著降低。Hg和As的单因子污染指数表明不同时期采样点位污染指数差别较大,综合污染指数表明Hg、As污染指数在2005—2021年显著下降,但仍处于污染水平,特别是Hg污染较严重。
The soil near Huludao zinc plant was taken as the research object,and the dynamic changes of mercury and arsenic contents in the soil around the zinc plant in 2005,2011 and 2021 were studied.The mercury and arsenic pollution was evaluated by single factor index method and comprehensive pollution index method.The results showed that:except for the average mass fraction of Hg in 2005 and the average mass fraction of As in 2011 and 2021,which were below their risk control values,the average content of Hg and As in soil in the three periods exceeded the background value of soil in Liaoning Province and the risk screening value and control value of soil pollution in agricultural land;overall,the content of Hg in the soil increased from 2005 to 2021,the pollution was more serious than that of As,and the content of As decreased significantly.The single-factor pollution index showed that the pollution indexes at sampling points in different periods were quite different.The comprehensive pollution index method showed that the pollution indexes of Hg and As decreased significantly from 2005 to 2021,but they were still at the pollution level,especially Hg pollution.
作者
郑冬梅
许笑笑
李新宇
王玉琦
郑美洁
ZHENG Dongmei;XU Xiaoxiao;LI Xinyu;WANG Yuqi;ZHENG Meijie(Key Laboratory of Ecological Restoration of Regional Pollution Environment, Ministry of Education, Shenyang University, Shenyang 110044, China)
出处
《沈阳大学学报（自然科学版）》
CAS
2022年第3期183-188,196,共7页
Journal of Shenyang University：Natural Science
基金
国家自然科学基金资助项目(41571085)。
关键词
有色冶金区
土壤
汞
砷
时空变化
风险评价
nonferrous metallurgical zone
soil
mercury
arsenic
temporal and spatial changes
risk assessment
