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DOI	10.1016/j.marpolbul.2020.111215
	Evaluation of the bioavailability of potentially toxic metals in surface sediments collected from a tropical river near an urban area
	Brito G.B.; da Silva Júnior J.B.; Dias L.C.; de Santana Santos A.; Hadlich G.M.; Ferreira S.L.C.
发表日期	2020
ISSN	0025326X
卷号	156
英文摘要	The objective of this study was to evaluate the bioavailability of the metals cadmium, copper, lead, nickel, and zinc from sediment samples collected in the Paraguaçu river between the cities of Cachoeira and São Félix in the state of Bahia in Brazil. The method used was the acid extraction of volatile sulfides and metals extracted simultaneously (AVS-SEM) as described in the literature. For the extraction of sulfide, an argon drag system was used after acidification of the samples with HCl, releasing the volatile sulfides collected in the basic solution. Its determination was made by molecular absorption spectrophotometry using the methylene blue method. For quantification of the metals, the sediment with acid was filtered and the residual solution was analyzed by inductively coupled plasma mass spectrometry (ICP MS) in which the elements that were associated with the sulfide were released in solution. The bioavailability evaluation was done by the relation between the sum of the concentrations of the metals in solution (SEM) and the concentration of sulfide in each sample (AVS). When the ∑SEM/AVS ratio is >1, the medium is considered contaminated by the high bioavailability of the metals to other environmental compartments. In the samples collected in the Paraguaçu river in two campaigns, with an ∑SEM/AVS ratio of 0.007 to 1.082, the last value being the only critical>1, while the other quantities in the metallic phase were not available for a biota. By comparing the metal concentration data with the internationally established tolerance limits, all the values found were below the critical values, presenting no toxic risks to the surrounding ecosystem. © 2020 Elsevier Ltd
英文关键词	Contamination; Inorganics compounds; Paraguaçu River; Sediment; Urban area
语种	英语
scopus关键词	Aromatic compounds; Biochemistry; Inductively coupled plasma mass spectrometry; Metals; Rivers; Sediments; Sulfur compounds; Tropics; Environmental compartment; Inductively coupled plasma mass spectrometries (ICPMS); Metal concentrations; Molecular absorption spectrophotometry; Potentially toxic metals; Residual solutions; Surface sediments; Tolerance limits; Extraction; argon; cadmium; copper; hydrochloric acid; lead; metal; methylene blue; nickel; sulfide; zinc; heavy metal; sulfide; acidification; adsorption; bioavailability; concentration (composition); fluvial deposit; heavy metal; inductively coupled plasma method; sediment chemistry; spectrophotometry; toxicity; tropical environment; urban area; absorption spectrophotometry; acidification; adsorption; Article; bioavailability; Brazil; ecotoxicity; environmental protection; geographic distribution; health hazard; inductively coupled plasma mass spectrometry; particle size; pH; quantitative analysis; risk assessment; river; sand; sediment; surface property; toxicity testing; tropical river; urban area; water analysis; water contamination; water pollutant; water sampling; bioavailability; ecosystem; environmental monitoring; river; sediment; water pollutant; Bahia; Brazil; Paraguacu River; Biological Availability; Brazil; Ecosystem; Environmental Monitoring; Geologic Sediments; Metals, Heavy; Rivers; Sulfides; 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/148946
作者单位	Postgraduate in Chemistry, Chemistry Institute, Federal University of Bahia (UFBA), Street Barão of Geremoabo, s/n, Ondina Campus, Salvador, Bahia 40170-270, Brazil; Postgraduate Program in Geochemistry: Petroleum and Environment, Institute of Geosciences, Federal University of Bahia (UFBA), Salvador, BA 40170-020, Brazil
推荐引用方式 GB/T 7714	Brito G.B.,da Silva Júnior J.B.,Dias L.C.,et al. Evaluation of the bioavailability of potentially toxic metals in surface sediments collected from a tropical river near an urban area[J],2020,156.
APA	Brito G.B.,da Silva Júnior J.B.,Dias L.C.,de Santana Santos A.,Hadlich G.M.,&Ferreira S.L.C..(2020).Evaluation of the bioavailability of potentially toxic metals in surface sediments collected from a tropical river near an urban area.Marine Pollution Bulletin,156.
MLA	Brito G.B.,et al."Evaluation of the bioavailability of potentially toxic metals in surface sediments collected from a tropical river near an urban area".Marine Pollution Bulletin 156(2020).