Influence of soil evolution on the heavy metal risk in three kinds of intertidal zone of the Pearl River Estuary

Bibliographic Data

ID21648533
AuthorsJianbo Liao (0000-0001-8472-3625, Research Center for Eco‐Environmental Engineering Dongguan University of Technology Dongguan PR China), Sheng Deng (0000-0003-0073-5579, Research Center for Eco‐Environmental Engineering Dongguan University of Technology Dongguan PR China), Xinhui Liu (0000-0002-0706-7836, State Key Laboratory of Water Environment Simulation, School of Environment Beijing Normal University Beijing PR China, corresponding author), Hui Lin (0009-0002-0642-7761, Research Center for Eco‐Environmental Engineering Dongguan University of Technology Dongguan PR China), Chenghao Yu (0000-0002-5793-1864, China North Energy Conservation and Environmental Protection Co. Beijing PR China), Chaohai Wei (0000-0002-4240-6442, School of Environment and Energy South China University of Technology Guangzhou PR China)
Year2021
Volume32
Issue2
Pages583-596
Publication date2021-01-30
Peer ReviewedYes
Open AccessYes
TypeARTICLE
VenueLand Degradation and Development (JOURNAL)
Journal identifiersISSN: 1085-3278 • E-ISSN: 1099-145X
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ldr.3724
OpenAlexW3082104687
LanguageEN
References cited56

Human activities and the increasing emphasis on coastal protection contribute to the diversity and evolution of intertidal soil. But, less is known about the influence of soil evolution on the heavy metal risk in intertidal zones. In this study, soil samples were collected from three kinds of intertidal zone in the Pearl River Estuary, including bare beach (BB), a spartina growing area (SGA), and a mangrove growing area (MGA), to reveal the influence of key factors on the heavy metal risk. The results showed that the highest concentrations of Cd, Zn, Pb, Cu, Ni, and Cr mainly existed in the surface layer of SGA and MGA and decreased with depth, reaching 3.57, 365.26, 91.24 95.12, 58.47, and 111.35 mg kg −1 , respectively. Residual fractions were the main geochemical fractions and increased with depth, while exchangeable fractions showed the opposite trend. Based on the geoaccumulation index, soils were moderately to extremely polluted by Cd and partially to moderately polluted by Zn, Cu, and Ni. Cd had high potential adverse effects (ranging from 25.29 to 45) in MGA according to the risk assessment code. Correlation and principal component analyses indicated that soil organic carbon (SOC), clay, pH, Fe, and Mg were the key factors that affected the heavy metal risk. Linear regression revealed that SOC and clay were positively correlated with the pollution level of heavy metals, while clay and Fe were positively correlated with the ecological risk. Consequently, the variation in properties due to intertidal soil evolution may modulate the risk of heavy metals

Biology · Estuary · Heavy metals · Intertidal zone · Mangrove · Marsh · Spartina alterniflora · Wetland · Chemistry · Coal and Its By-products · Environmental Science · Geochemistry and Elemental Analysis · Heavy metals in environment · Ecology · Environmental Chemistry · Geology · Oceanography

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