大柴旦盐湖表层底泥重金属污染及其风险性评价
Distribution and Ecological Risk Assessment for Heavy Metals in Surface Sediments of Da Qaidam Salt Lake
投稿时间:2018-06-18  修订日期:2018-09-10
DOI:
中文关键词:  大柴旦盐湖  表层底泥  重金属污染  地质积累指数  潜在生态风险指数
英文关键词:Da Qaidam Salt Lake  Surface sediment  Heavy metal pollution  Geoaccumulation index  Potential ecological risk index
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位邮编
高春亮 中国科学院青海盐湖研究所 810008
余俊清 中国科学院青海盐湖研究所 810008
闵秀云 中国科学院青海盐湖研究所 
王德荣 中国科学院青海盐湖研究所 
成艾颖 中国科学院青海盐湖研究所 
洪荣昌 中国科学院青海盐湖研究所 
张丽莎 中国科学院青海盐湖研究所 
摘要点击次数: 62
全文下载次数: 0
中文摘要:
      本文通过对大柴旦湖区东南部表层底泥中的重金属(Cr、Cu、Pb、Zn、As、Co、Ni和Mn)研究分析,揭示出湖区不同地带的重金属污染物在空间分布上呈现不均匀特征。基于重金属富集因子法(EF)、地质积累指数法(Igeo)以及潜在生态风险指数法(RI)对大柴旦盐湖底泥中的重金属污染程度进行了量化评定。研究结果表明,大柴旦湖区东南部表层底泥中的重金属元素的平均富集程度依次为EF (As)>EF (Mn)>EF (Cu)>EF (Zn)>EF (Pb)>EF (Cr)>EF (Ni)>EF (Co);表层底泥中重金属污染主要以砷为主,为湖区生态风险指数增高的主要因子。综合来看,大柴旦湖区东南部表层底泥中的重金属污染程度整体上处于轻微状态。但随着周边地区人类活动的加剧,人为非自然排放将成为大柴旦湖区表层底泥中重金属的主要物质来源,需要加以重视。
英文摘要:
      The paper focused on heavy metal concentrations (Cr, Cu, Pb, Zn, As, Co, Ni, and Mn) from surface sediments in the southeastern Da Qaidam Salt Lake. Based on the pressed powder pellet method and X-ray fluorescence spectrometry analysis, as well as three quantitative assessment methods such as the heavy metal enrichment factors (EF), geoaccumulation index (Igeo), and the potential ecological risk index (RI), the possible sources and pollution level of heavy metals were studied. The results showed that spatial distributions of heavy metal concentration were indicative of nonuniform characteristics in different zones of Da Qaidam Salt Lake, the average enrichment level of heavy metals from sediments followed the order: EF (As)>EF (Mn)>EF (Cu)>EF (Zn)>EF (Pb)>EF (Cr)>EF (Ni)>EF (Co), and the main heavy metal pollution was arsenic pollution. In general, the status of heavy metal pollution in Da Qaidam Salt Lake was not strong, but anthropogenic emissions would become the main sources of heavy metal from surface sediments in Da Qaidam Salt Lake along with the frequent and strong human activities in surrounding region.
  查看/发表评论  下载PDF阅读器
关闭