Potential Ecological Risk of Heavy Metals in a Typical Tributary of the Three Gorges Reservoir

Water and sediment samples were collected from a tributary (Ruxi River) of the Three Gorges Reservoir (TGR) to analyze the concentrations of seven heavy metals (HMs) and their fractions for better understanding the migration, bioavailability and potential environmental risk of HMs. The results indic...

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Published in:Bulletin of environmental contamination and toxicology 2021, Vol.106 (1), p.18-23
Main Authors: Fang, Zhiqing, Wang, Yongmin, Xie, Deti, Wang, Dingyong
Format: Article
Language:English
Subjects:
Aquatic Pollution
Bioavailability
Cadmium
Canyons
China
Earth and Environmental Science
Ecotoxicology
Environment
Environmental changes
Environmental Chemistry
Environmental Health
Environmental Monitoring
Environmental quality
Environmental risk
Geologic Sediments
Heavy metals
Humans
Metal concentrations
Metals, Heavy - analysis
Pollution
Quality standards
Reservoirs
Risk Assessment
Rivers
Sediment samplers
Sediments
Soil Science & Conservation
Surface water
Tributaries
Waste Water Technology
Water Management
Water Pollutants, Chemical - analysis
Water pollution
Water Pollution Control
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description Water and sediment samples were collected from a tributary (Ruxi River) of the Three Gorges Reservoir (TGR) to analyze the concentrations of seven heavy metals (HMs) and their fractions for better understanding the migration, bioavailability and potential environmental risk of HMs. The results indicated that the concentrations of HMs in water were lower than the Environmental Quality Standards for Surface Water Class I standards, except for Ni. Cd in sediment was found to be more sensitive to environmental changes, as the acid-soluble fraction of Cd accounted for about 40% of total Cd, and the sediment–water partition coefficient of Cd was the smallest among all the HMs. Meanwhile, multiple risk assessment methods of HMs indicated that sediment Cd in most sampling sites, significantly influenced by human activities, exhibited heavy pollution, suggesting that the Cd pollution should be attached great importance in the Ruxi River.
doi_str_mv 10.1007/s00128-020-03014-5
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subjects Aquatic Pollution
Bioavailability
Cadmium
Canyons
China
Earth and Environmental Science
Ecotoxicology
Environment
Environmental changes
Environmental Chemistry
Environmental Health
Environmental Monitoring
Environmental quality
Environmental risk
Geologic Sediments
Heavy metals
Humans
Metal concentrations
Metals, Heavy - analysis
Pollution
Quality standards
Reservoirs
Risk Assessment
Rivers
Sediment samplers
Sediments
Soil Science & Conservation
Surface water
Tributaries
Waste Water Technology
Water Management
Water Pollutants, Chemical - analysis
Water pollution
Water Pollution Control
title Potential Ecological Risk of Heavy Metals in a Typical Tributary of the Three Gorges Reservoir
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