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DOI	10.1016/j.marpolbul.2020.111146
	Combining geochemical and chemometric tools to assess the environmental impact of potentially toxic elements in surface sediment samples from an urban river
	da Silva Júnior J.B.; Abreu I.M.; de Oliveira D.A.F.; Hadlich G.M.; de Albergaria Barbosa A.C.R.
发表日期	2020
ISSN	0025326X
卷号	155
英文摘要	This article investigates sediments collected from the banks of the Subaé River located in Todos os Santos Bay in the state of Bahia, Brazil, in 2018, twenty-five years after the closing of a former lead alloy processing plant. Ten sediment samples were collected at different points of the course of the river and its estuarine region. Chemometric tools were used to determine geochemical correlations between the organic matter content and concentration of sulfides and potentially toxic metals. The inorganic geochemical variables (enrichment factor [EF]) used in this evaluation were concentrations of the Pb, Cd, Cu, Zn, and Ni. Chemical element analyses were performed using ICP-OES. To assess the interaction between metals and sulfide or metals and organic matter, concentrations of Pb, Cd, Cu, Zn, Ni, sulfide, and the silt-clay fraction constituted the organic geochemical parameters selected to characterize the amount of organic matter present in Subaé River sediment samples, determining the carbon content (%TOC) to compose the matrix of the principal component analysis (PCA) and hierarchical cluster analysis. PCA showed that 88.3% of the samples were representative for assessing correlations between geochemical variables. A tendency toward binding was found among Cu, Cd, Ni, and sulfide, as well as the silt-clay fraction. The concentrations (mg kg−1) of lead, zinc, and copper were higher in both collection campaigns, ranging from 4.72 to 31.34, 12.76 to 54.24, and 5.34 to 31.37, respectively. Pb and Zn were presented in elemental form when assessed as a function of the pH and Eh of the environment. Except for Cd (EF: 0.51 to 5.49), the other elements exhibited little or no potential pollution in the aquatic environment of the Subaé River. © 2020 Elsevier Ltd
英文关键词	Exploratory analysis; Geochemical index; Heavy metals; Sediment; Tropical river
语种	英语
scopus关键词	Biogeochemistry; Chemical analysis; Chemical elements; Hierarchical clustering; Hierarchical systems; Lead alloys; Nickel compounds; Organic compounds; Plant shutdowns; Principal component analysis; Rivers; Sediments; Silt; Sulfur compounds; Zinc sulfide; Aquatic environments; Chemical element analysis; Geochemical correlation; Geochemical parameters; Geochemical variables; Organic matter content; Potentially toxic elements; Potentially toxic metals; River pollution; cadmium; carbon; copper; lead; nickel; organic matter; sulfide; toxic substance; zinc; heavy metal; concentration (composition); data processing; enrichment; environmental impact assessment; heavy metal; river; sediment chemistry; surficial sediment; toxic substance; Article; Bahia; binding affinity; chemometric analysis; concentration (parameter); controlled study; elemental analysis; environmental impact assessment; estuary; exploratory research; geochemical analysis; geochemistry; inductively coupled plasma atomic emission spectrometry; pH; river; sediment; urban area; water pollution; Brazil; environmental monitoring; river; sediment; water pollutant; Bahia; Brazil; Todos os Santos Bay; Brazil; Environmental Monitoring; Geologic Sediments; Metals, Heavy; 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/148959
作者单位	Postgraduate Program in Geochemistry: Petroleum and Environment (POSPETRO), Geoscience Institute, Federal University of Bahia (UFBA), Rua Barão de Jeremoabo, s/n, Salvador, BA 40170-020, Brazil; LEPETRO, Excellence in Geochemistry: Petroleum, Energy and Environment, Geoscience Institute, Federal University of Bahia (UFBA), Rua Barão de Jeremoabo, s/n, Salvador, BA 40170-020, Brazil
推荐引用方式 GB/T 7714	da Silva Júnior J.B.,Abreu I.M.,de Oliveira D.A.F.,et al. Combining geochemical and chemometric tools to assess the environmental impact of potentially toxic elements in surface sediment samples from an urban river[J],2020,155.
APA	da Silva Júnior J.B.,Abreu I.M.,de Oliveira D.A.F.,Hadlich G.M.,&de Albergaria Barbosa A.C.R..(2020).Combining geochemical and chemometric tools to assess the environmental impact of potentially toxic elements in surface sediment samples from an urban river.Marine Pollution Bulletin,155.
MLA	da Silva Júnior J.B.,et al."Combining geochemical and chemometric tools to assess the environmental impact of potentially toxic elements in surface sediment samples from an urban river".Marine Pollution Bulletin 155(2020).