Space distribution of heavy metals and its relationship with macrozoobenthos in the Heihe River, Northwest China

	Space distribution of heavy metals and its relationship with macrozoobenthos in the Heihe River, Northwest China
	Wang, Yu 1,2,3; Li, Bao-Long 3; Feng, Qi 2; Wang, Zhi-Jun 3; Liu, Wei 2; Zhang, Xin-Yu 3; Kong, De-Xing 3; Zuo, Yi-Feng 3
刊名	Zhongguo Huanjing Kexue/China Environmental Science
	2021-03-20
卷号	41 期号:3 页码:1354-1365
关键词	Biodiversity Heavy metals Manganese removal (water treatment) Multivariant analysis Rivers Slags Surficial sediments Distribution characteristics Heavy metal concentration Heavy metal contents Heavy metal pollution Industrial wastewaters Multivariate statistical method Pollution of heavy metals Potential ecological risk
ISSN号	1000-6923
英文摘要	A study of exploring the distribution characteristics of heavy metals between river water and surface sediments and analyzing the response to macrozoobenthos were carried out different areas in August 2019 in the upper and middle reaches of the Heihe River. The contents of eight heavy metals (Cr, Cu, Ni, Pb, Zn, Cd, Hg and As) were determined for macrozoobenthos, water and surface sediments samples in this study. The spatial distribution characteristics of heavymetals in macrozoobenthos, water and surface sediments were analyzed by multivariate statistical method. Moreover, the pollution risk of heavy metals in river water and surface sediments was evaluated by comprehensive pollution index and potential ecological risk index. Finally, the relationship between macrozoobenthos and river water and surface sediments was analyzed by correlation analysis. The results showed that heavy metal concentrations was low in river water and the spatial variation was not significant. The average values of w(Mn), w(Zn), w(Cr), w(Ni), w(Cu), w(Pb), w(As), w(Cd) in surface sediments were 1.36, 2.26, 2.66, 2.10, 1.98, 1.85, 1.89 and 3.33 times higher than the background values of water and soil respectively, and the spatial differences were significant, Cu, Cr and Ni in the surface sediments may come from the application of pesticides and fertilizers and the discharge of industrial wastewater. Cd, Pb and Mn may come from the superposition of slag and its leachate and natural background; as and Zn may be related to the discharge of domestic and industrial wastewater. The pollution level of heavy metals in water was very low and the pollution of heavy metals in surface sediments was mainly caused by Cd, Cr, Zn and Ni. Furthermore, the spatial variation trend was as follows: upstream tributary > upstream main stream > middle stream. The RI values of Mn and Cd in surface sediments were 17.20 and 12.30, respectively, which belonged to high risk level. What's more, other elements were at low risk level. The macrozoobenthos biomass and diversity showed spatial difference distribution and the density of Basommatophora was positively correlated with as in water body. The density of Coleoptera, Hemiptera and Basommatophora and the three biodiversity indexes were significantly correlated with heavy metal content in surface sediments, which could be used as potential indicators of heavy metal pollution in river water and surface sediments in the upper and middle reaches of Heihe River. © 2021, Editorial Board of China Environmental Science. All right reserved.
语种	中文
出版者	Chinese Society for Environmental Sciences
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148354]
专题	能源与动力工程学院
作者单位	1.Key Laboratory of Complementary Energy System of Biomass and Solar Energy, Lanzhou; 730050, China 2.Key Laboratory of Ecohydrology of Inland River Basion, Northwest Institute Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China; 3.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Wang, Yu,Li, Bao-Long,Feng, Qi,et al. Space distribution of heavy metals and its relationship with macrozoobenthos in the Heihe River, Northwest China[J]. Zhongguo Huanjing Kexue/China Environmental Science,2021,41(3):1354-1365.
APA	Wang, Yu.,Li, Bao-Long.,Feng, Qi.,Wang, Zhi-Jun.,Liu, Wei.,...&Zuo, Yi-Feng.(2021).Space distribution of heavy metals and its relationship with macrozoobenthos in the Heihe River, Northwest China.Zhongguo Huanjing Kexue/China Environmental Science,41(3),1354-1365.
MLA	Wang, Yu,et al."Space distribution of heavy metals and its relationship with macrozoobenthos in the Heihe River, Northwest China".Zhongguo Huanjing Kexue/China Environmental Science 41.3(2021):1354-1365.