The characteristics and risk assessments of heavy metals in suspended particulate matter during summer in the Humen outlet of the Pearl River Estuary

LI Jia-yi; DONG Han-ying; NIU Li-xia; YANG Qing-shu; LUO Xiang-xin; ZHANG Tao

doi:10.12111/j.mes.20200021

Volume 40 Issue 2

Mar. 2021

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Chinese Journal of MARINE ENVIRONMENTAL SCIENCE > 2021 > 40(2): 184-189, 199. > DOI: 10.12111/j.mes.20200021

LI Jia-yi, DONG Han-ying, NIU Li-xia, YANG Qing-shu, LUO Xiang-xin, ZHANG Tao. The characteristics and risk assessments of heavy metals in suspended particulate matter during summer in the Humen outlet of the Pearl River Estuary[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2021, 40(2): 184-189, 199. DOI: 10.12111/j.mes.20200021

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The characteristics and risk assessments of heavy metals in suspended particulate matter during summer in the Humen outlet of the Pearl River Estuary

LI Jia-yi^{1, 2, 3, 4, 5,},
DONG Han-ying⁶,
NIU Li-xia^{2, 3, 4, 5, 7},
YANG Qing-shu^{2, 3, 4, 5, 7},
LUO Xiang-xin^{2, 3, 4, 5, 7, ,},
ZHANG Tao^{2, 3, 4, 5, 7}

1.
School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
2.
Institute of Estuarine and Coastal Research, Sun Yat-sen University, Guangzhou 510275, China
3.
State and Local Joint Engineering Laboratory of Estuarine Hydraulic Technology, Guangzhou 510275, China
4.
Guangdong Provincial Engineering Research Center of Coasts, Islands and Reefs, Guangzhou 510275, China
5.
Southern Laboratory of Ocean Science and Engineering, Zhuhai 519082, China
6.
School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai 519082, China
7.
School of Marine Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China

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Received Date: January 21, 2020
Revised Date: June 10, 2020
Available Online: March 18, 2021

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Abstract

Abstract

Based on the 27-hour continuous investigations in August 2017 in the Humen outlet of the Pearl River Estuary, this study aimed to examine the characteristics and risks of heavy metals in suspended particulate matter, and thus to provide a scientific basis for the pollution prevention of heavy metals,. Field samples of suspended particulate matter (N=81) were collected, and the contents of six heavy metal elements, namely Zn, Cu, Ni, Mn, Pb and Cr were measured in lab. In this study, Pearson correlation analysis, factor analysis and potential ecological risk assessment index were introduced to analyze the characteristics, sources, and pollution risks of heavy metals in suspended particulate matter. The findings showed that the averaged contents of six heavy metals exhibited a clear decreasing trend as Mn, Zn, Cu, Cr, Pb and Ni, and their contents have a significant positive correlation with the concentrations of suspended particulate matter. The source analyses demonstrated that Cu, Zn, and Mn were mainly originated from mining industry and metallurgical plants from the North river, while Ni, Pb, and Cr were mainly originated from manufacturing industry such as batteries near the Humen outlet. In addition, the overall potential ecological risk was classified at a low risk level based on the results of potential ecological risk assessment. Moreover, Cu and Pb contributed the most to the ecological risks, the combined contribution rate accounting for >80%. Therefore, Cu and Pb were the main pollution controls, which should be paid more attention for safety.
- heavy metal,
- factor analysis,
- ecological risk,
- Humen outlet

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