Potential ecological risk assessment and source analysis of heavy metals in surface sediments of the mangrove tidal flat in Dongzhai harbor,Hainan island
WANG Peng
WANG Junguang
LI Qiuzhong
ZHANG Gucheng
ZHANG Dongqiang
Abstract：The concentrations of heavy metal elements(As、Cd、Cr、Cu、Hg、Pb and Zn)in the surface sediments were investigated on the continental shelf off the Dongzhai port of Hainan island.Based on the field data,the sediment environment was evaluated using single factor standard index and geo-accu-mulation index.Quantitative assessment on the potential ecological risk of these heavy metals was per-formed using the potential ecological risk index.The dominant sources were also determined with Pear-son correlation analysis and principal component analysis.The results demonstrated that the environ-ment of surface sediments was generally clean by As but polluted by Pb、Zn、Hg、Cd、Cu and Cr accord-ing to the geo-accumulation index.Relatively medium potential ecological risk was observed in the study area with RI value was 169.8.The potential ecological risk measured by single factor ranking from high to low was Hg＞Cd＞Cu＞As＞Pb＞Cr＞Zn.We also found that sources of Cr、Cu、Hg、Pb and Zn were similar and potentially from industrial pollutants.As and Cd were derived from pollutants from agriculture.
Keywords：heavy metalssedimentspotential ecological risktidal flatDongzhai harbor
Publication Date：2026-02-25
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 87-94 )