Heavy metal contamination in surface sediments of intertidal zone in central Jiangsu Province: distribution, source, and assessment

XIANG Lihui; WANG Yanfen; JIANG Cidong; LIU Qiang; LI Weixin

doi:10.16028/j.1009-2722.2023.222

2024 Vol. 40, No. 8

Article Contents

Article navigation > Marine Geology Frontiers > 2024 > 40(8): 42-52

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XIANG Lihui, WANG Yanfen, JIANG Cidong, LIU Qiang, LI Weixin. Heavy metal contamination in surface sediments of intertidal zone in central Jiangsu Province: distribution, source, and assessment[J]. Marine Geology Frontiers, 2024, 40(8): 42-52. doi: 10.16028/j.1009-2722.2023.222

Citation:

XIANG Lihui, WANG Yanfen, JIANG Cidong, LIU Qiang, LI Weixin. Heavy metal contamination in surface sediments of intertidal zone in central Jiangsu Province: distribution, source, and assessment[J]. Marine Geology Frontiers, 2024, 40(8): 42-52. doi: 10.16028/j.1009-2722.2023.222

Heavy metal contamination in surface sediments of intertidal zone in central Jiangsu Province: distribution, source, and assessment

1.
Institute of Geochemical Exploration and Marine Geological Survey, ECE, Nanjing 210007, China
2.
Jiangsu East China Geological Environment Engineering Co. Ltd., Nanjing 210007, China
3.
Institute of Resource Survey and Evaluation of East China Geological Exploration Bureau, Nanjing 210007, China
4.
Shandong Provincial No.4 Institute of Geological and Mineral Survey, Weifang 261021, China

Received Date: 14 September 2023

Publish Date: 28 August 2024

Abstract

Abstract

Surface sediment samples were collected at 89 stations from intertidal zone in central Jiangsu Province in 2015. The concentrations, spatial distribution patterns, and interrelations of seven heavy metals (Cu, Pb, Zn, Cr, Cd and Hg) were studied and compared with previous investigations. The pollution status was evaluated systematically with China’s national sediment quality guidelines, geoaccumulation index, and enrichment factor. Results show that the concentrations of heavy metals in surface sediment varies greatly, and the average concentration followed the descending order of: Cr＞Zn＞Cu＞Pb＞As＞Cd＞Hg. The spatial distribution was uneven. High-value areas were spot-like or in patch. The heavy metal concentrations at all stations were below the possible effect level, and the overall potential ecological risk was low. The Pearson correlation coefficients, geoaccumulation indexes, enrichment factors, and R-type factor analysis show that heavy metals Cu, Pb and Zn were not polluted or enriched, and they were mainly from crustal materials or natural weathering. Cr was slightly polluted and enriched, which were jointly affected by natural weathering and human activities. Cd, As, and Hg were enriched and heavily polluted, which were mainly derived from anthropogenic sources.
- heavy metals /
- pollution assessment /
- surface sediments /
- intertidal zone /
- Jiangsu Province

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References

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