气候变化领域集成服务门户(CCPortal): Assessment of toxicity of metals in river sediments for human supply: Distribution; evaluation of pollution and sources identification

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DOI	10.1016/j.marpolbul.2020.111423
	Assessment of toxicity of metals in river sediments for human supply: Distribution; evaluation of pollution and sources identification
	Almeida L.C.; da Silva Júnior J.B.; dos Santos I.F.; de Carvalho V.S.; de Santana Santos A.; Hadlich G.M.; Ferreira S.L.C.
发表日期	2020
ISSN	0025326X
卷号	158
英文摘要	Ten surface sediments collected from Joanes River, Bahia, Brazil in rainy and drought periods in 2019 were evaluated according to the enrichment factor (EF), potential ecological risk index (RI), potential contamination index (PCI), pollution load index (PLI), and index of geoaccumulation (Igeo). Initially the dry sediment was subjected to granulometric analysis and determination of the concentration of organic matter. Then, the samples were digested in HNO3 and analyzed by Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES) to determine the metals cadmium (Cd), copper (Cu), chromium (Cr), nickel (Ni), lead (Pb) and zinc (Zn). Zn and Cu were classified in that order as the most contaminated elements in most sediment. Comparison of the total metal concentrations with the threshold (TELs) and probable (PELs) effect levels in sediment quality guidelines suggested a more worrisome situation for Zn (648.83–1415.90 μg g−1; PELZn = 315 μg g−1), of which concentrations were occasionally associated with adverse biological effects in four sediments, followed by Cu in five sediments during dry and rainy periods; while adverse effects were rarely associated with Cd, Cr, Ni, and Pb. In another evaluation, Cd, Cu, Cr, and Zn could be considered the most dangerous in the entire river, as they were classified in the high levels of contamination by the PCI, associated with serious adverse effects in most samples. In an assessment regarding the ecological risks in the study environment, the sediment samples remained below the limit established by the risk index (IR). The Zn presented moderately severe enrichment (6.78–11.83) in all the collection stations in the dry and rainy periods, followed by the Cd that presented moderate enrichment (2.23–4.17), whose values exceeded almost 1000 times the background at one site. Through the PCA it was possible to evidence the existing correlation between metals, organic matter, and silt and clay fraction. The results obtained in the PCA represented more than 80% of the variance between the data. The environmental risk assessment revealed a significant increase in the risk associated with metals during the rainy season. This is probably due to the greater supply of organic matter from the leaching of the margins. © 2020
英文关键词	Environmental risk assessment; Joanes River; Metals; Sediment; Temporary distribution
语种	英语
scopus关键词	Biogeochemistry; Copper; Inductively coupled plasma; Optical emission spectroscopy; Organic compounds; Risk assessment; Rivers; Sediments; Zinc; Environmental risk assessment; Granulometric analysis; Index of Geo accumulations; Inductively coupled plasma-optical emission spectrometry; Pollution load indices; Potential ecological risk; Sediment quality guidelines; Sources identifications; River pollution; cadmium; chromium; copper; lead; metal; nickel; organic matter; rain; zinc; heavy metal; anthropogenic source; cadmium; environmental risk; fluvial deposit; human activity; risk assessment; river pollution; sediment pollution; toxicity; water quality; zinc; Article; Brazil; concentration (parameter); controlled study; drought; environmental enrichment; environmental risk; heavy metal poisoning; rainy season; risk; risk assessment; river; sea pollution; sediment; environmental monitoring; human; risk assessment; sediment; water pollutant; Bahia; Brazil; Brazil; Environmental Monitoring; Geologic Sediments; Humans; Metals, Heavy; Risk Assessment; Rivers; Water Pollutants, Chemical
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/148736
作者单位	Postgraduate Program in Chemistry, Chemistry Institute, Federal University of Bahia (UFBA), Street Barão de Jeremoabo, s/n, Salvador, BA 40170-270, Brazil; Postgraduate Program in Geochemistry: Petroleum and Environment (POSPETRO), Geoscience Institute, Federal University of Bahia (UFBA), Street Barão de Jeremoabo, s/n, Salvador, BA 40170-290, Brazil; Universidade Estadual de Feira de Santana (UEFS), Feira de Santana, Bahia 44036-900, Brazil
推荐引用方式 GB/T 7714	Almeida L.C.,da Silva Júnior J.B.,dos Santos I.F.,et al. Assessment of toxicity of metals in river sediments for human supply: Distribution; evaluation of pollution and sources identification[J],2020,158.
APA	Almeida L.C..,da Silva Júnior J.B..,dos Santos I.F..,de Carvalho V.S..,de Santana Santos A..,...&Ferreira S.L.C..(2020).Assessment of toxicity of metals in river sediments for human supply: Distribution; evaluation of pollution and sources identification.Marine Pollution Bulletin,158.
MLA	Almeida L.C.,et al."Assessment of toxicity of metals in river sediments for human supply: Distribution; evaluation of pollution and sources identification".Marine Pollution Bulletin 158(2020).