柳江流域沉积物重金属生态风险评价及来源分析

doi:10.11720/wtyht.2020.1210

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Abstract

In this study, 91 sediment samples were collected from the middle and lower reaches of Liujiang River. The geochemical characteristics of As, Cd, Cr, Cu, Hg, Ni, Pb, Zn and other elements were analyzed. The current pollution situation and potential risks were predicted and evaluated, and the sources of heavy metals were analyzed. The results show that: The spatial dispersion of elements in the sediments of Liujiang River Catchment is relatively large, and the distribution of heavy metal elements shows strong regional characteristics.Distribution of heavy metal elements in Liujiang River Catchment shows strong regional characteristics.As, Cr, Cu, Hg and Ni are mainly from natural sources, while Cd and Pb are mainly from human sources. The high-value areas of Cd natural source contribution mainly distribute in Longjiang River Catchment, while the high-value areas of industrial and mining sources contribution mainly distribute around Jincheng River and Liuzhou District of Liujiang River.

Key words： Liujiang River sediments pollution of heavy metals ecological risk source analysis

Received: 11 April 2019 Published: 03 March 2020

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Corresponding Authors: Jie LI E-mail: 187292565@qq.com

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	Articles by authors
	Xiao-Yu ZHONG
	Tian-Sheng WU
	Jie LI
	Guo-Dong ZHEN
	Xiao-Xiong ZHUO
	Dong-Chao GUAN
	Lei WANG
	Bing-Ji MO

Cite this article:

Xiao-Yu ZHONG,Tian-Sheng WU,Jie LI, et al. Ecological risk assessment and source analysis of heavy metals in sediments of Liujiang River Catchment[J]. Geophysical and Geochemical Exploration, 2020, 44(1): 191-199.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.1210 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I1/191

The location of Liujiang Rriver and the distribution of sampling points

The relation between the I_geo and excessed standard of heavy metal

Reference value of heavy metals in middle part of Guangxi surface soil

Pollution grade for the single heavymetal and potential ecological risk index

Contents of heavy metals in sediments of Liujiang Rriver Catchment

Comparison of heavy metal elements contents in different reaches

I_geo index of heavy metals in sediments of Liujiang Rriver Catchment

河段	$E r i$								RI
河段	As	Cd	Cr	Cu	Hg	Ni	Pb	Zn	RI
金城江	11.23	266.33	1.12	3.31	58.15	2.58	16.95	2.70	362.37
柳江	9.31	102.90	1.07	4.10	28.83	2.89	5.15	1.16	155.41
龙江	7.02	87.52	1.12	3.71	22.51	2.35	4.87	0.97	130.07
罗秀河	3.63	13.88	0.89	3.17	8.83	2.13	4.87	0.45	37.84
洛清江	3.39	26.49	0.86	3.21	17.12	2.25	2.72	0.51	56.56
融江	14.69	53.26	1.11	4.35	25.38	2.91	4.36	0.93	106.99
平均	8.46	100.89	1.05	3.79	28.17	2.63	6.18	1.17	152.34

Ecological risk of heavy metals in sediments of Liujiang Rriver Catchment

Results of PCA of heavy metal concentrations in sediments of Liujiang Rriver Catchment

Source contribution ratios of heavy metal

The contribution maps of major sources to Cd

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