Characteristics of heavy metals and their influential factors between sediments and water of the Zhujiang River Estuary in summer

Fu Tao; Liang Haihan; Niu Lixia; Dang Haoming; Tao Wei; Yang Qingshu

doi:10.12284/hyxb2022166

Volume 44 Issue 10

Oct. 2022

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Fu Tao，Liang Haihan，Niu Lixia, et al. Characteristics of heavy metals and their influential factors between sediments and water of the Zhujiang River Estuary in summer[J]. Haiyang Xuebao，2022, 44(10)：182–192 doi: 10.12284/hyxb2022166

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Characteristics of heavy metals and their influential factors between sediments and water of the Zhujiang River Estuary in summer

doi: 10.12284/hyxb2022166

Fu Tao^1
,,
Liang Haihan¹,
Niu Lixia^{1, 2, 3
,
,},
Dang Haoming¹,
Tao Wei⁴,
Yang Qingshu^{1, 2, 3}

1.
School of Marine Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
2.
Southern Laboratory of Ocean Science and Engineering (Zhuhai), Zhuhai 519082, China
3.
Guangdong Provincial Engineering Research Center of Coasts, Islands and Reeds, Guangzhou 510275, China
4.
South China Sea Environmental Monitoring Center, State Oceanic Administration, Guangzhou 510275, China

Received Date: 2022-03-14
Rev Recd Date: 2022-05-28

Available Online: 2022-06-15

Publish Date: 2022-10-01

Abstract

Abstract

Characteristics of heavy metals in the Zhujiang River Estuary are mainly influenced by the interacting river-tide dynamics. Water and sediment samples were collected in the Zhujiang River Estuary and its adjacent zones in the summer of 2018. The present study aimed to investigate the estuarine behaviors (i.e., sedimentary, transportation, accumulation) of seven metals Hg, As, Zn, Cd, Pb, Cu, and Cr, which were co-influenced by the physicochemical properties in the estuary. The levels of heavy metals in sediments were higher than those dissolved in water. The heavy metals in sediments were more stable and the pollution was thus more serious. The results of Pearson correlation and principal component analysis showed that dissolved metals were more easily diluted and mixed, and the sediment metals were significantly influenced by the total organic carbon and redox. The metal partitioning between sediments and water was discussed as well in this study under the influence of estuarine dynamics, which indicated the phase exchange between multimedia in the estuary; Pb and Cr were more easily absorbed in the particulate particles, while Cd and Hg were intended to dissolve in water. The significant correlations between metals (e.g., Hg, Pb, and Zn) indicated the similar sources, and the principal component analysis was used to probe into the source contributions of heavy metals in sediments of the Zhujiang River Estuary, contributed mainly by industrial pollution, followed by agricultural pollution and atmospheric deposition. These findings will provide important information for the effective controls of heavy metal inputs and estuary management.
- heavy metals,
- estuarine dynamics,
- metal partitioning,
- sedimentary environment,
- Zhujiang River Estuary

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