Temporal variation and regional transfer of heavy metals in the Pearl (Zhujiang) River, China

Environmental Science and Pollution Research International
Gengchong ZhenWei Zhang

Abstract

Heavy metals are highly persistent in water and have a particular significance in ecotoxicology. Heavy metals loading from the Pearl River are likely to cause significant impacts on the environment in the South China Sea and the West Pacific. In this study, using monthly monitoring data from a water quality monitoring campaign during 2006-2012, the temporal variation and spatial transfer of six heavy metals (lead (Pb), copper (Cu), cadmium (Cd), zinc (Zn), arsenic (As), and mercury (Hg)) in the Pearl River were analyzed, and the heavy metal fluxes into the sea were calculated. During this period, the annual heavy metal loads discharged from the Pearl River into the South China Sea were 5.8 (Hg), 471.7 (Pb), 1524.6 (Cu), 3819.6 (Zn), 43.9 (Cd), and 621.9 (As) tons, respectively. The metal fluxes showed a seasonal variation with the maximum fluxes occurring from June to July. There is a close association between metal fluxes and runoff. The analysis of the heavy metal transfer from the upstream to the downstream revealed that the transfer from the upstream accounted for a major portion of the heavy metals in the Pearl River Delta. Therefore, earlier industry relocation efforts in the Pearl River watershed may have limited effect ...Continue Reading

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Citations

May 19, 2017·Environmental Science and Pollution Research International·Alezania Silva PereiraPedro Antônio Oliveira Mangabeira
Mar 22, 2020·Environmental Science and Pollution Research International·Shengxing LongKangning Xiong
Jul 5, 2018·Bulletin of Environmental Contamination and Toxicology·Shao-Wei ChenJie-Wen Peng
Jul 19, 2020·Bulletin of Environmental Contamination and Toxicology·Tingyong ChenLihua Li
Sep 14, 2016·Environmental Science and Pollution Research International·Paolo MontuoriMaria Triassi
May 30, 2019·International Journal of Environmental Research and Public Health·Jie ZengYang Tang
Jan 28, 2020·Ecotoxicology and Environmental Safety·Yuanyuan ZhangJianfeng Liu
Apr 20, 2021·International Journal of Biological Macromolecules·Chi WangHongbing Deng

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