Seasonal and spatial variations of heavy metalsin surface sediments collected from the BaoxiangRiver in the Dianchi Watershed, China
文献类型：期刊论文
| 作者 | Xiao, DD(Xiao, Dongdong)1; Wu, F(Wu, Feng)2; Feng, ZB(Feng, Zebo)1; Shi, Zhengtao; Su, B(Su,Bing)1; Shi, ZT(Shi, Zhengtao)1 |
| 刊名 | Human and Ecological Risk Assessment: An InternationalJournal
 |
| 出版日期 | 2018-02-13 |
| 卷号 | 24期号:7页码:1916-1929 |
| 关键词 | Sediments Heavy Metal Speciation Ecological Risk Assessment Baoxiang River Dianchi Lake |
| 英文摘要 | To explore potential ecological hazards due to heavy metals in the Dianchi Lake Watershed, a three-stage European Community Bureau of Reference (BCR) sequential extraction procedure was applied to examine the spatial distributions and relative speciation ratios of Zn, Cu, Ni, Pb, and Cr in Baoxiang River sediments during wet and dry seasons. The metal species have similar spatial variations during different seasons. In the upstream reaches of the Baoxiang River, heavy metals reside primarily in the non-extractable residual fraction (72–90%). In the midstream, the residual fraction (35–89%) remains dominant, but the extractable fraction increases, featuring especially notable increases in the reducible fraction (5–40%). Downstream, the Cu, Ni, Pb, and Cr residual fractions remain high (46–80%) and the extractable fractions increase rapidly; the Zn extractable fraction is quite high (65.5%). Anthropogenic sources drive changes in heavy metal speciation. Changes in the river environment, such as pH and oxidation-reduction potential, also affect speciation. The reducible fraction of heavy metals in Baoxiang River sediments is most sensitive to pH. Potential ecological risk assessments for these five elements indicate that risks from Zn and Pb are mild to moderate in the middle and lower reaches of the river. |
| 项目编号 | 2014003 |
| 语种 | 英语 |
| 资助机构 | the Water Conservancy Science and Technology project of Yunnan Provincial Water Resources Department ; the Water Conservancy Science and Technology project of Yunnan Provincial Water Resources Department |
| 源URL | [http://ir.ieecas.cn/handle/361006/5249]  |
| 专题 | 地球环境研究所_粉尘与环境研究室 |
| 通讯作者 | Shi, Zhengtao |
| 作者单位 | 1.School of Tourism and Geographical Science, Yunnan Normal University, Kunming, Yunnan, China 2.KeyLaboratory of Aerosol Chemistry and Physics, State Key Laboratory of Loess and Quaternary Geology, Instituteof Earth Environment, Chinese Academy of Sciences, Xian, China |
| 推荐引用方式 GB/T 7714 | Xiao, DD,Wu, F,Feng, ZB,et al. Seasonal and spatial variations of heavy metalsin surface sediments collected from the BaoxiangRiver in the Dianchi Watershed, China[J]. Human and Ecological Risk Assessment: An InternationalJournal,2018,24(7):1916-1929. |
| APA | Xiao, DD,Wu, F,Feng, ZB,Shi, Zhengtao,Su, B,&Shi, ZT.(2018).Seasonal and spatial variations of heavy metalsin surface sediments collected from the BaoxiangRiver in the Dianchi Watershed, China.Human and Ecological Risk Assessment: An InternationalJournal,24(7),1916-1929. |
| MLA | Xiao, DD,et al."Seasonal and spatial variations of heavy metalsin surface sediments collected from the BaoxiangRiver in the Dianchi Watershed, China".Human and Ecological Risk Assessment: An InternationalJournal 24.7(2018):1916-1929. |
入库方式： OAI收割
来源：地球环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。