Distribution and risk assessment of heavy metals in surface sediments of coastal mudflats on Leizhou Peninsula, China

Tingting Li; Lili Jia; Xin Zhu; Min Xu; Xinchang Zhang

doi:10.1007/s13131-022-2101-6

Volume 42 Issue 1

Jan. 2023

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Tingting Li, Lili Jia, Xin Zhu, Min Xu, Xinchang Zhang. Distribution and risk assessment of heavy metals in surface sediments of coastal mudflats on Leizhou Peninsula, China[J]. Acta Oceanologica Sinica, 2023, 42(1): 25-34. doi: 10.1007/s13131-022-2101-6

Citation:

Tingting Li, Lili Jia, Xin Zhu, Min Xu, Xinchang Zhang. Distribution and risk assessment of heavy metals in surface sediments of coastal mudflats on Leizhou Peninsula, China[J]. Acta Oceanologica Sinica, 2023, 42(1): 25-34. doi: 10.1007/s13131-022-2101-6

Citation:

Tingting Li, Lili Jia, Xin Zhu, Min Xu, Xinchang Zhang. Distribution and risk assessment of heavy metals in surface sediments of coastal mudflats on Leizhou Peninsula, China[J]. Acta Oceanologica Sinica, 2023, 42(1): 25-34. doi: 10.1007/s13131-022-2101-6

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Distribution and risk assessment of heavy metals in surface sediments of coastal mudflats on Leizhou Peninsula, China

doi: 10.1007/s13131-022-2101-6

Tingting Li^{1, 2, 3
,
,},
Lili Jia³,
Xin Zhu³,
Min Xu¹,
Xinchang Zhang^{4, 5}

1.
Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Guangdong Geological Survey Institute, Guangzhou 510080, China
4.
State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
5.
CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China

Funds: The Guangdong, Guizhou, Hunan and Jiangxi 1:250 000 Land Quality Geochemical Survey under contract No. DD20160327-04; the National Natural Science Foundation of China under contract No. U1911202; the Guangdong Basic and Applied Basic Research Foundation under contract No. 2021A1515011547; the Guangzhou Basic and Applied Basic Research Foundation under contract No. 202102020465.

More Information

Corresponding author: E-mail: tingtingliscsio@126.com
Received Date: 2022-05-23
Accepted Date: 2022-09-13

Available Online: 2022-10-28

Publish Date: 2023-01-25

Abstract

Abstract

Mudflats play a vital role in maintaining the dynamic balance between sea and land. To understand the characteristics, sources, and pollution risks of six heavy metals (As, Cd, Cr, Cu, Hg, and Pb) in the coastal mudflats on the Leizhou Peninsula, 257 surface sediment samples were studied using mathematical statistics, correlation analysis, and factor analysis. The results show that the overall concentrations of these heavy metals are low although there are several high abnormal points in the local areas. The strong correlation between these heavy metals indicates that the sources of some of the metals are similar, yet their elemental combinations in different cities (counties) varied. According to the calculated enrichment factor (EF), anthropogenic activity-induced heavy metals were determined in order of decreasing influence: As, Cd, Pb, Cr, Cu, and Hg. The low EF values of Hg indicate that it does not present as a contaminant in the study area, while low values of Cr and Cu from the Lianjiang City suggest that these two metals were also attributed to natural sources. The presence of As, Cd, Cr, Cu, and Pb from the remaining cities (counties) should be influenced by anthropogenic activities. The overall potential ecological risk index indicates that the ecological risks posed by the six analyzed heavy metals to the Leizhou Peninsula mudflats, in order of decreasing risk, are Cd, As, Hg, Pb, Cu, and Cr. It is noteworthy that only Cd in Lianjiang City demonstrated substantial ecological risk. Other examined heavy metals in other cities of the study area showed slight ecological risk.
- mudflat,
- heavy metal,
- ecological risk assessment,
- source identification,
- Leizhou Peninsula

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References(36)

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