Changes in chemical fractions and ecological risk prediction of heavy metals in estuarine sediments of Chunfeng Lake estuary, China

The changes of available forms of heavy metals would affect their corresponding ecological risks in sediments. The distribution of chemical fractions of heavy metals in sediment profiles from Chunfeng Lake estuary was investigated and then a prediction model for potential ecological risk index (PMRI...

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Bibliographic Details
Published in:Marine pollution bulletin 2019-01, Vol.138, p.575-583
Main Authors: Huang, Bo, Guo, Zhaohui, Xiao, Xiyuan, Zeng, Peng, Peng, Chi
Format: Article
Language:English
Subjects:
Ageing
Aging
Aging (metallurgy)
Arsenic - analysis
Brackishwater environment
Cadmium
Cadmium - analysis
China
Dongting Lake
Ecological effects
Ecological risk assessment
Ecotoxicology - methods
Environmental Monitoring
Environmental risk
Estuaries
Estuarine dynamics
Estuarine environments
Estuarine pollution
Geologic Sediments - analysis
Heavy metals
Lake sediments
Lakes
Mathematical models
Metals
Metals, Heavy - analysis
Metals, Heavy - toxicity
Organic chemistry
Prediction models
Profiles
Regression analysis
Risk
Risk Assessment
Risk prediction
Sediment
Sediment pollution
Sediment profile
Sediments
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - toxicity
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Summary:The changes of available forms of heavy metals would affect their corresponding ecological risks in sediments. The distribution of chemical fractions of heavy metals in sediment profiles from Chunfeng Lake estuary was investigated and then a prediction model for potential ecological risk index (PMRI) was proposed to forecast the changes of ecological risks caused by the aging process of metals in sediments. The results show that the estuarine sediments were polluted by As and Cd. The proportions of available metals were generally decreased with depth, while those of the residual forms showed an opposite trend. The aging rates of Cd and As were found to be 0.21 and 0.12%/year, respectively. The PMRI model showed that the total ecological risk of metals in sediments decreased from moderate to low risk level (
ISSN:0025-326X
1879-3363
DOI:10.1016/j.marpolbul.2018.12.015