Distribution, Fraction, and Ecological Assessment of Heavy Metals in Sediment-Plant System in Mangrove Forest, South China Sea

PloS One
Ruili LiGuo Yu Qiu

Abstract

Overlying water, sediment, rhizosphere sediment and mangrove seedlings in the Futian mangrove forest were analyzed for heavy metals. The results showed that mangrove plant acidified sediment and increased organic matter contents. Except for chromium (Cr), nickel (Ni) and copper (Cu) in Aegiceras corniculatum sediment, heavy metals in all sediments were higher than in overlying water, rhizosphere sediment and mangrove root. Heavy metals in Avicennia marina sediments were higher than other sediments. The lower heavy metal biological concentration factors (BCFs) and translocation factors (TFs) indicated that mangrove plant adopted exclusion strategy. The geo-accumulation index, potential ecological risk index and risk assessment code (RAC) demonstrated that heavy metals have posed a considerable ecological risk, especially for cadmium (Cd). Heavy metals (Cr, Ni, Cu and Cd) mainly existed in the reducible fractions. These findings provide actual heavy metal accumulations in sediment-plant ecosystems in mangrove forest, being important in designing the long-term management and conservation policies for managers of mangrove forest.

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Citations

May 28, 2019·Environmental Monitoring and Assessment·José de AndaLissie Marcela de la Torre-Castro
Jun 8, 2017·Environmental Science and Pollution Research International·Khadijah A IsimekhaiDiane Purchase
Oct 28, 2018·International Journal of Environmental Research and Public Health·Libo PanBao Xiang
Sep 9, 2018·Environmental Science and Pollution Research International·Debojyoti RoyMaitree Bhattacharyya
Nov 7, 2020·Marine Pollution Bulletin·Ronggen JiangCai Lin
May 28, 2021·Environmental Geochemistry and Health·Dhafer Ali AlamriSabry M Shaheen

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