在职博士学费第34卷第4期2020年8月
Vol.34No.4中国春节介绍
Aug.,2020能源环境保护
Energy Environmental Protection
移动扫码阅读乔丽洁,李文斐,景琳,等•西安市主城区大气降尘重金属的污染水平及生态风险评价[J].能源环境保护, 2020,34(4):86-91.我身边的小人物
QIAO Lijie,LI Wenfei,JING Lin,et al.Pollution and ecological risk asssment of heavy metals from urban atmospheric deposition in Xi x an[J].Energy Environmental Protection,2020,34(4):86-91.仁威祖庙
西安市主城区大气降尘重金属的英语答题技巧
污染水平及生态风险评价
乔丽洁,李文斐,景琳,孟晨星,李荣荣,候昕,董继先
(陕西科技大学机电工程学院,陕西西安710021)
摘要:基于西安市主城区大气降尘中重金属含量分布进行了来源解析,并对其潜在生态风险进行了评价。利用电感耦合等离子发射光谱法(IGP-OES)测定重金属的浓度组成,采用富集因子法判别大气降尘中6种重金属的来源,采用潜在生态风险指数法评价其生态风险。结果表明:6种重金属的平均含量依次为Cd<Ni<Cu<Cr<Pb<Zn,测定的重金属元素质量浓度超出1996年西安市数据的3・0~6・8倍;Cd、Pb、Zn、Cu、Cr、Ni富集因子EF平均值分别为24.544、&085、5・552、3・397、1.334和1.412;Cd的RI值为1397.38,远超其他5种金属,风险程度最高;6种重金属元素浓度的季节、空间差异明显,反映出人类活动是西妥市大气降尘中重金属的主要污染来源;富集最为严重的Cd主要来源于垃圾焚烧,Zn的富集可能是受燃煤和垃圾焚烧的共同作用,Pb主要由汽车尾气和汽车刹车轮胎摩擦产生,Cu、Cr、Ni主要由于自然来源和一些人类活动;Cd对城市及周边郊区生态系统的危害最为严重,Pb有不利影响,Cu.Zn.Cr和Ni的危害较小。
关键词:大气降尘;富集因子;生态风险评价;电感耦合等离子发射光谱法(ICP-OES);重金属
中图分类号:X826文献标识码:A文章编号:1006-8759(2020)04-0086-06
Pollution and ecological risk asssment of heavy metals from
urban atmospheric deposition in Xi'an
QIAO Lijie,LI Wenfei,JING Lin,MENG Chenxing,LI Rongrong,HOU Xin,
反应和反映
CHEN Jiadong,DONG Jixian
(Collage of Mechanical and Electrical Engineering,Shaanxi University of Science and
Technology9Xi9an710021,China)
Abstract:Bad on the distribution of heavy metal content in the atmospheric deposition in the main urban area of Xi'an city,the potential ecological risks were evaluated.Inductively Coupled Plasma Optical Emission Spectrometry(ICP-OES)was ud to determine the concentration of heavy metals.The sources of six heavy metals in atmospheric deposition were analyzed by Elemental Enrichment Factor Method.The potential ecological risk was evaluated by Potential Ecological Risk Method.The results show that the average contents of six heavy metals are Cd<Ni<Cu<Cr<Pb<Zn in turn.The concentrations of heavy metal elements was3.0〜6.8times higher than tho in1996・The average EF concentrations of Cd,Pb,Zn,Cu,Cr,and Ni are24.544,8.08,5.552,3.397,1.334,and1.412,respectively.
The RI value of Cd is1397.38which is far higher than the other5metals and shows the highest risk.
The asonal and spatial differences of six heavy metal concentration are obvious which indicates that
收稿日期:2020-05-28
没关系歌词>黄果树景区
基金项目:陕西省大学生创新创业训练项目(S201910708018)
第一作者简介:乔丽洁(1976-),女,河南孟县人,博士在读,主要从事环境资源利用、轻工装备及控制方面的研究工作。E-mail:qiaolijie@
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