Abundance and mobility of metal(loid)s in reservoir sediments of Singe Tsangpo and Yarlung Tsangpo in Tibet, China: Implications for ecological risk

Zhao, Zhenjie1,2; Li, Shehong1; Xue, Lili1,2; Liao, Jie1,2; Zhao, Jingjing1,2; Wu, Mei1,2; Wang, Mingguo3; Yang, Qiang4; Sun, Jing1; Zheng, Yan5

2021-02-01

10.1007/s10653-021-00810-8

ENVIRONMENTAL GEOCHEMISTRY AND HEALTH   影响因子和分区

0269-4042

1573-2983

Geogenic arsenic enrichment in soil and river sediments of Tibet compared to its upper crustal abundance has been observed, raising the question whether other trace elements are also enriched and thus may pose ecological risks. Because human activities are limited, the reservoir sediments after the recent construction of the Shiquan dam on the Singe Tsangpo (ST) and the Zam dam on the Yarlung Tsangpo (YT) collect and thus represent material sourced from 14,870 km(2) and 157,668 km(2) of drainage areas, respectively. Bulk concentrations of the metalloid (As) and 13 metals (Li, Be, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd, Cs, and Pb) are analyzed for 123 samples from 9 mostly silty sediment cores (depth: 11-20 cm) from the Shiquan Reservoir and for 250 samples from 13 mostly sandy sediment cores (depth: 9-28 cm) from the Zam Reservoir. These elemental concentrations are normalized to the upper crustal Fe abundance of 3.9% to arrive at a regional sediment geochemical background value for each element. The regional background values of most elements in the ST drainage and the YT drainage are comparable with the upper crustal abundance. However, three elements (Li, As, and Cs) in both drainage basins display significant enrichment compared to their respective upper crustal abundance. Sequential leaching of a subset of sediment samples from the ST (n = 18) and YT (n = 29) drainages reveals that chemical fractions of metals and metalloids in these two reservoirs are similar, with most of the elements dominated by the residual fraction with low mobility. Taken together, the ecological risks of the most studied elements in the reservoir sediments are likely low pending further aquatic bioavailability investigations, except that As, Cu, Pb, and Be deserve more attention due to their elevated levels in mobile fractions.

Geochemical background Metals Arsenic Tibet Singe Tsangpo Yarlung Tsangpo

SCI

英语

通讯

National Natural Science Foundation of China[41673137,41273146] ; China Geological Survey[DD20190534] ; Shenzhen Science and Technology Innovation Commission["JCYJ20170817105912601","GJHZ20180411143520274"] ; State Key Laboratory of Environmental Geochemistry[SKLEG2019713]

Engineering ; Environmental Sciences & Ecology ; Public, Environmental & Occupational Health ; Water Resources

Engineering, Environmental ; Environmental Sciences ; Public, Environmental & Occupational Health ; Water Resources

WOS:000614673300001

SPRINGER

ENVIRONMENT/ECOLOGY

Web of Science

1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.China Geol Survey, Ctr Hydrogeol & Environm Geol Survey, Baoding 071051, Peoples R China
4.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA
5.Southern Univ Sci & Technol China, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China

Zhao, Zhenjie,Li, Shehong,Xue, Lili,et al. Abundance and mobility of metal(loid)s in reservoir sediments of Singe Tsangpo and Yarlung Tsangpo in Tibet, China: Implications for ecological risk[J]. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH,2021.

Zhao, Zhenjie.,Li, Shehong.,Xue, Lili.,Liao, Jie.,Zhao, Jingjing.,...&Zheng, Yan.(2021).Abundance and mobility of metal(loid)s in reservoir sediments of Singe Tsangpo and Yarlung Tsangpo in Tibet, China: Implications for ecological risk.ENVIRONMENTAL GEOCHEMISTRY AND HEALTH.

Zhao, Zhenjie,et al."Abundance and mobility of metal(loid)s in reservoir sediments of Singe Tsangpo and Yarlung Tsangpo in Tibet, China: Implications for ecological risk".ENVIRONMENTAL GEOCHEMISTRY AND HEALTH (2021).