Geochemical characteristics of dissolved heavy metals in Zhujiang River, Southwest China: Spatial-temporal distribution, source, export flux estimation, and a water quality assessment

	Geochemical characteristics of dissolved heavy metals in Zhujiang River, Southwest China: Spatial-temporal distribution, source, export flux estimation, and a water quality assessment
	Jie Zeng; Guilin Han; Qixin Wu; Yang Tang
	2019
发表期刊	Peerj
页码	1-21
摘要	To investigate the sources and spatial-temporal distribution of dissolved heavy metals in river water, and to evaluate the water quality, a total of 162 water samples were collected from 81 key sampling points in high and low flflow seasons separately in the Zhujiang River, Southwest China. Ten dissolved heavy metals (V, Cr, Mn, Co, Ni, Cu, Mo, Cd, Ba, and Pb) in the Zhujiang River water exhibit little variation at temporal scale, but vary with a signifificant spatial heterogeneity. Furthermore, different metals present different variation trends along the main channel of the Zhujiang River. Our results suggest that Ba (14.72 mg L-1 in low flflow season and 12.50 mg L-1 in high flflow season) and Cr (6.85 mg L-1 in low flflow season and 7.52 mg L-1 in high flflow season) are consistently the most abundant metals in the two sampling periods. According to the water quality index (WQI values ranged from 1.3 to 43.9) and health risk assessment, metals investigated in Zhujiang River are below the hazard level (all hazard index (HI) < 1). Application of statistical approaches, including correlation matrix and principal component analysis (PCA), identify three principal components that account for 61.74% of the total variance, the results conclude that the anthropogenic heavy metals (V, Cr, Ni, and Cu) are greatly impacted by the dilution effect, and the heavy metals in Zhujiang River are mainly presented a natural sources signature from the perspective of entire basin. Moreover, our results reveal that the estimated export budget of several heavy metals including V (735.6 t year-1 ), Cr (1,561.1 t year-1 ), Ni (498.2 t year-1 ), and Mo (118.9 t year-1 ) to the ocean are higher than the world average.
关键词	Zhujiang River water Quality Index health Risk Dissolved Heavy Metals Southwest China
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/42920512-1/10484
专题	环境地球化学国家重点实验室
作者单位	1.School of Scientific Research, China University of Geosciences (Beijing), Beijing, China 2.Key Laboratory of Karst Environment and Geohazard, Ministry of Land and Resources, Guizhou University, Guiyang, China 3.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China
推荐引用方式 GB/T 7714	Jie Zeng；Guilin Han；Qixin Wu；Yang Tang. Geochemical characteristics of dissolved heavy metals in Zhujiang River, Southwest China: Spatial-temporal distribution, source, export flux estimation, and a water quality assessment[J]. Peerj,2019:1-21.
APA	Jie Zeng；Guilin Han；Qixin Wu；Yang Tang.(2019).Geochemical characteristics of dissolved heavy metals in Zhujiang River, Southwest China: Spatial-temporal distribution, source, export flux estimation, and a water quality assessment.Peerj,1-21.
MLA	Jie Zeng；Guilin Han；Qixin Wu；Yang Tang."Geochemical characteristics of dissolved heavy metals in Zhujiang River, Southwest China: Spatial-temporal distribution, source, export flux estimation, and a water quality assessment".Peerj (2019):1-21.

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