title: Heavy metal contamination and ecological risk in Futian mangrove forest sediment in Shenzhen Bay, South China.
abstract: Surface sediments in the Futian mangrove forest (South China) were analyzed for heavy metals including cadmium (Cd), chromium (Cr), copper (Cu), lead (Pb) and zinc (Zn). The heavy metal distributions varied greatly in surface sediments, reflecting some sediment heterogeneity. The heavy metal concentrations decreased in the order of Zn>Cr>Pb>Cu>Cd. According to the mean probable effects level quotient, the combination of studied metals had a 21% probability of being toxic. The potential ecological risk index and geo-accumulation index also revealed high metal contamination. Cd was of primary concern due to its higher assessment values and potential for adverse biological effects. Multivariate analysis implied that clay and silt played a significant role in raising the levels of Cr, Cu and Zn. The percentage of mobile heavy metals was relatively higher, without considerable ecological risk to the biota based on the risk assessment code.
authors.affiliation: Key Laboratory for Urban Habitat Environment Science and Technology, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen 518055, China.
authors.forename: Rongyu
authors.initials: R
authors.lastname: Li
authors.affiliation: Key Laboratory for Urban Habitat Environment Science and Technology, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen 518055, China.
authors.forename: Ruili
authors.initials: R
authors.lastname: Li
authors.affiliation: Shenzhen Key Laboratory of Environment Simulation and Pollution Control, PKU-HKUST Shenzhen-Hong Kong Institute, Shenzhen 518057, China. Electronic address: chaiminwei9@gmail.com.
authors.forename: Minwei
authors.initials: M
authors.lastname: Chai
authors.affiliation: Key Laboratory for Urban Habitat Environment Science and Technology, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen 518055, China.
authors.forename: Xiaoxue
authors.initials: X
authors.lastname: Shen
authors.affiliation: Guangdong Neilingding Futian National Nature Reserve, Shenzhen 518000, China.
authors.forename: Hualin
authors.initials: H
authors.lastname: Xu
authors.affiliation: Key Laboratory for Urban Habitat Environment Science and Technology, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen 518055, China. Electronic address: qiugy@pkusz.edu.cn.
authors.forename: Guoyu
authors.initials: G
authors.lastname: Qiu
mesh_terms: D061006:Bays; D002104:Cadmium / Q000032:analysis / Q000633:toxicity; D002681:China; D004784:Environmental Monitoring / Q000379:methods; D019015:Geologic Sediments / Q000032:analysis*; D019216:Metals, Heavy / Q000032:analysis* / Q000633:toxicity; D015999:Multivariate Analysis; D018570:Risk Assessment / Q000379:methods; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000633:toxicity; D053833:Wetlands
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D002104:Cadmium
keywords: Ecological risk assessment; Heavy metal; Mangrove; Sediment