Tropical climate effect on the toxic heavy metal pollutant course of road-deposited sediments

In modern society, the intense vehicle traffic and the lack of effective mitigating strategies may adversely impact freshwater systems. Road-deposited sediments (RDS) accumulate a variety of toxic substances which are transported into nature during hydrologic events, mainly affecting water bodies...

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Principais autores: Santos, Paula R. S. dos, Fernandes, Glauber J. T., Moraes, Edgar Perin, Moreira, Lúcio Flávio Ferreira
Formato: article
Idioma:English
Publicado em: Elsevier
Assuntos:
Rainfall
Road-deposited sediment
Toxic heavy metals
Principal component analysis
Natal
Endereço do item:https://repositorio.ufrn.br/handle/123456789/30499
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spelling ri-123456789-304992023-02-03T19:19:12Z Tropical climate effect on the toxic heavy metal pollutant course of road-deposited sediments Santos, Paula R. S. dos Fernandes, Glauber J. T. Moraes, Edgar Perin Moreira, Lúcio Flávio Ferreira Rainfall Road-deposited sediment Toxic heavy metals Principal component analysis Natal In modern society, the intense vehicle traffic and the lack of effective mitigating strategies may adversely impact freshwater systems. Road-deposited sediments (RDS) accumulate a variety of toxic substances which are transported into nature during hydrologic events, mainly affecting water bodies through stormwater runoff. The aim of this study was to evaluate the RDS metal enrichment ratio between the end of wet season and the middle of the dry season for Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn in samples from Natal, Brazil. Twenty RDS, drainage system and river sediment samples were collected in the wet and dry seasons using a stainless-steel pan, brush and spatula. In the laboratory, the samples were submitted to acid digestion and heavy metal concentrations were measured by atomic absorption spectrometry (AAS). A consistent RDS enrichment by heavy metals in dry season samples was followed by an increase in the finest particle size fraction (D < 63 mm). Maximum concentrations were 5, ND, 108, 23810, 83, ND, 77 and 150mg kg-1 for Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn, respectively. The RDS enrichment ratio was Cr(1.3 ), Cu(2.6 ), Fe(3.3 ), Mn(1.5 ), Pb(1.5 ) and Zn(2.1 ). The Geo-accumulation Index values showed that RDS were moderately polluted for Cu and slighted polluted for Zn and Pb. Principal Component Analysis (PCA) showed that the accumulation of toxic heavy metals decreased according to water flow 2020-10-28T20:43:18Z 2020-10-28T20:43:18Z 2019-05-10 article DOS SANTOS, P. R.S.; FERNANDES, G.J.T. ; MORAES, E. P.; MOREIRA, L.F.F.. Tropical climate effect on the toxic heavy metal pollutant course of road-deposited sediments. Environmental Pollution, v. 251, p. 766-772, 2019. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0269749119313004?via%3Dihub. Acesso em 15 out. 2020. https://doi.org/10.1016/j.envpol.2019.05.043 0269-7491 1873-6424 https://repositorio.ufrn.br/handle/123456789/30499 10.1016/j.envpol.2019.05.043 en Elsevier
institution Repositório Institucional
collection RI - UFRN
language English
topic Rainfall
Road-deposited sediment
Toxic heavy metals
Principal component analysis
Natal
spellingShingle Rainfall
Road-deposited sediment
Toxic heavy metals
Principal component analysis
Natal
Santos, Paula R. S. dos
Fernandes, Glauber J. T.
Moraes, Edgar Perin
Moreira, Lúcio Flávio Ferreira
Tropical climate effect on the toxic heavy metal pollutant course of road-deposited sediments
description In modern society, the intense vehicle traffic and the lack of effective mitigating strategies may adversely impact freshwater systems. Road-deposited sediments (RDS) accumulate a variety of toxic substances which are transported into nature during hydrologic events, mainly affecting water bodies through stormwater runoff. The aim of this study was to evaluate the RDS metal enrichment ratio between the end of wet season and the middle of the dry season for Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn in samples from Natal, Brazil. Twenty RDS, drainage system and river sediment samples were collected in the wet and dry seasons using a stainless-steel pan, brush and spatula. In the laboratory, the samples were submitted to acid digestion and heavy metal concentrations were measured by atomic absorption spectrometry (AAS). A consistent RDS enrichment by heavy metals in dry season samples was followed by an increase in the finest particle size fraction (D < 63 mm). Maximum concentrations were 5, ND, 108, 23810, 83, ND, 77 and 150mg kg-1 for Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn, respectively. The RDS enrichment ratio was Cr(1.3 ), Cu(2.6 ), Fe(3.3 ), Mn(1.5 ), Pb(1.5 ) and Zn(2.1 ). The Geo-accumulation Index values showed that RDS were moderately polluted for Cu and slighted polluted for Zn and Pb. Principal Component Analysis (PCA) showed that the accumulation of toxic heavy metals decreased according to water flow
format article
author Santos, Paula R. S. dos
Fernandes, Glauber J. T.
Moraes, Edgar Perin
Moreira, Lúcio Flávio Ferreira
author_facet Santos, Paula R. S. dos
Fernandes, Glauber J. T.
Moraes, Edgar Perin
Moreira, Lúcio Flávio Ferreira
author_sort Santos, Paula R. S. dos
title Tropical climate effect on the toxic heavy metal pollutant course of road-deposited sediments
title_short Tropical climate effect on the toxic heavy metal pollutant course of road-deposited sediments
title_full Tropical climate effect on the toxic heavy metal pollutant course of road-deposited sediments
title_fullStr Tropical climate effect on the toxic heavy metal pollutant course of road-deposited sediments
title_full_unstemmed Tropical climate effect on the toxic heavy metal pollutant course of road-deposited sediments
title_sort tropical climate effect on the toxic heavy metal pollutant course of road-deposited sediments
publisher Elsevier
publishDate 2020
url https://repositorio.ufrn.br/handle/123456789/30499
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AT moraesedgarperin tropicalclimateeffectonthetoxicheavymetalpollutantcourseofroaddepositedsediments
AT moreiralucioflavioferreira tropicalclimateeffectonthetoxicheavymetalpollutantcourseofroaddepositedsediments
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