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Article

Trace Element Contamination in One of the Yangtze Tributaries (Hunan, China)—Source Review and Potential Release from Sediments

1
Faculty of Sciences, University of Tours, E.A. 6392 GéoHydorsystèmes Continentaux, Parc de Grandmont, 37200 Tours, France
2
School of Metallurgy and Environment, Central South University, Changsha 410083, China
3
ASEM Water Resources Research and Development Center, Changsha 410028, China
4
College of Resources and Environment, Hunan Agriculture University, Changsha 410128, China
5
BRGM, Water, Environment, Process Development and Analysis Division, 45060 Orleans, CEDEX 02, France
*
Author to whom correspondence should be addressed.
Water 2021, 13(3), 271; https://doi.org/10.3390/w13030271
Received: 18 September 2020 / Revised: 28 September 2020 / Accepted: 3 October 2020 / Published: 22 January 2021
(This article belongs to the Special Issue Environmental Fate of Contaminants in the Aquatic Environment)
Spatio-temporal distribution and leachability of some trace elements (TE) were investigated in sediments of the Xiangjiang River, tributary of the Yangtze River. Based on data collected during 2015–2017, a literature review and geoaccumulation indexes, the pollution level was the highest for Cd, Sb and Hg (Igeo > 3). Over the period reviewed, the TE contamination level displayed almost no temporal variation but an obvious spatial distribution. The most upstream contamination hotspot (Cd > Cr > As, Cu, Pb, Zn > Hg, Sb) was the Songbai section. This hotspot did not spread further downstream. The second hotspot identified was the Zhuzhou–Xiangtan section, impacted by Cd > Hg, Pb, Zn > Cu, with the Zhuzhou area being particularly highly impacted by Pb and Zn. A 30-day leaching experimental protocol under aerobic and anaerobic conditions was carried out to access TE mobility. Low percentages of TE released were calculated, showing that the TE fate mostly depends on the stability of bearing phases under specific physicochemical and microbial conditions. In this case, the studied sediments can be an important sink for these TE. However, some environmental issues have to be considered as some leachate concentrations of contaminants (As, Cr, Cu and U) released into water exceed freshwater aquatic life criteria. View Full-Text
Keywords: leaching experiment; mobility; surface sediment; trace elements; Xiangjiang river leaching experiment; mobility; surface sediment; trace elements; Xiangjiang river
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MDPI and ACS Style

Grosbois, C.; Desmet, M.; Zhang, M.; Gassama, N.; Peng, Q.; Zhang, J.; Luo, L.; Zhang, F.; Battaglia, F. Trace Element Contamination in One of the Yangtze Tributaries (Hunan, China)—Source Review and Potential Release from Sediments. Water 2021, 13, 271. https://doi.org/10.3390/w13030271

AMA Style

Grosbois C, Desmet M, Zhang M, Gassama N, Peng Q, Zhang J, Luo L, Zhang F, Battaglia F. Trace Element Contamination in One of the Yangtze Tributaries (Hunan, China)—Source Review and Potential Release from Sediments. Water. 2021; 13(3):271. https://doi.org/10.3390/w13030271

Chicago/Turabian Style

Grosbois, Cécile; Desmet, Marc; Zhang, Mengxue; Gassama, Nathalie; Peng, Qinghui; Zhang, Jiachao; Luo, Lin; Zhang, Fengfeng; Battaglia, Fabienne. 2021. "Trace Element Contamination in One of the Yangtze Tributaries (Hunan, China)—Source Review and Potential Release from Sediments" Water 13, no. 3: 271. https://doi.org/10.3390/w13030271

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