Anthropogenic impacts on the temporal variation of heavy metals in Daya Bay (South China). (December 2022)

• Record Type: Journal Article
• Authors: Man, Xiangtian; Huang, Honghui; Chen, Fang; Gu, Yangguang; Liang, Ruize; Wang, Boguang; Jordan, Richard W.; Jiang, Shijun
• Is Part Of: Marine pollution bulletin. Volume 185:Part A(2022)
• Publication Date: 2022-12
• Subjects: Sediment -- Heavy metals -- Enrichment factor -- Anthropogenic activities -- Daya Bay; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2022.114209
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: A detailed study of a sediment core from Daya Bay (South China) has revealed three stages of heavy metal deposition over the past century. Prior to the 1980s, heavy metal concentrations were low with limited influence by human activities. From the 1980s to 2000, metal pollution intensified, and anthropogenic activities, such as oil and petrochemical industries, and fuel combustion, had the greatest direct influence on Hg, Ni, Pb, and Zn concentrations, whereas atmospheric deposition and mariculture were also contributors to the continued increase in Cr, Cu, Pb, Zn, and Ni. Since the year 2000, heavy metal concentration has declined and stabilized. It is noteworthy that anthropogenic input of Cu and Pb is ongoing and may result in a moderate pollution risk. Both modified pollution index (MPI) and modified ecological risk (MRI) consistently indicate that the ecological risk in terms of heavy metals in Daya Bay has remained moderate over the past 70 years. Graphical abstract: Unlabelled Image Highlights: Heavy metal deposition in Daya Bay over the past century has gone through three periods. The sediment of Daya Bay was affected by multiple pollution sources. Cu, Zn, Pb, and Ni still had increasing trends to varying degrees in the upper sediment core. Temporal variation in heavy metals is associated with industrial development, transportation, and energy consumption.