Cargando…

Assessment of the distribution, bioavailability and ecological risks of heavy metals in the lake water and surface sediments of the Caohai plateau wetland, China

In this study, selected heavy metals (Hg, As, Cd, Pb, Cr, Cu and Zn) in the lake water and sediments from the Caohai wetland, which is a valuable state reserve for migrant birds in China, were investigated to assess the spatial distribution, sources, bioavailability and ecological risks. The results...

Descripción completa

Detalles Bibliográficos
Autores principales: Hu, Jing, Zhou, Shaoqi, Wu, Pan, Qu, Kunjie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5734908/
https://www.ncbi.nlm.nih.gov/pubmed/29253896
http://dx.doi.org/10.1371/journal.pone.0189295
_version_ 1783287112502607872
author Hu, Jing
Zhou, Shaoqi
Wu, Pan
Qu, Kunjie
author_facet Hu, Jing
Zhou, Shaoqi
Wu, Pan
Qu, Kunjie
author_sort Hu, Jing
collection PubMed
description In this study, selected heavy metals (Hg, As, Cd, Pb, Cr, Cu and Zn) in the lake water and sediments from the Caohai wetland, which is a valuable state reserve for migrant birds in China, were investigated to assess the spatial distribution, sources, bioavailability and ecological risks. The results suggested that most of the higher concentrations were found in the eastern region of the lakeshore. The concentration factor (CF) revealed that Hg, Cd and Zn were present from moderate risk levels to considerable risk levels in this study; thus, based on the high pollution load index (PLI) values, the Caohai wetland can be considered polluted. According to the associated effects-range classification, Cd may present substantial environmental hazards. An investigation of the chemical speciation suggested that Cd and Zn were unstable across most of the sites, which implied a higher risk of quick desorption and release. Principal component analysis (PCA) indicated that the heavy metal contamination originated from both natural and anthropogenic sources.
format Online
Article
Text
id pubmed-5734908
institution National Center for Biotechnology Information
language English
publishDate 2017
publisher Public Library of Science
record_format MEDLINE/PubMed
spelling pubmed-57349082017-12-22 Assessment of the distribution, bioavailability and ecological risks of heavy metals in the lake water and surface sediments of the Caohai plateau wetland, China Hu, Jing Zhou, Shaoqi Wu, Pan Qu, Kunjie PLoS One Research Article In this study, selected heavy metals (Hg, As, Cd, Pb, Cr, Cu and Zn) in the lake water and sediments from the Caohai wetland, which is a valuable state reserve for migrant birds in China, were investigated to assess the spatial distribution, sources, bioavailability and ecological risks. The results suggested that most of the higher concentrations were found in the eastern region of the lakeshore. The concentration factor (CF) revealed that Hg, Cd and Zn were present from moderate risk levels to considerable risk levels in this study; thus, based on the high pollution load index (PLI) values, the Caohai wetland can be considered polluted. According to the associated effects-range classification, Cd may present substantial environmental hazards. An investigation of the chemical speciation suggested that Cd and Zn were unstable across most of the sites, which implied a higher risk of quick desorption and release. Principal component analysis (PCA) indicated that the heavy metal contamination originated from both natural and anthropogenic sources. Public Library of Science 2017-12-18 /pmc/articles/PMC5734908/ /pubmed/29253896 http://dx.doi.org/10.1371/journal.pone.0189295 Text en © 2017 Hu et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Hu, Jing
Zhou, Shaoqi
Wu, Pan
Qu, Kunjie
Assessment of the distribution, bioavailability and ecological risks of heavy metals in the lake water and surface sediments of the Caohai plateau wetland, China
title Assessment of the distribution, bioavailability and ecological risks of heavy metals in the lake water and surface sediments of the Caohai plateau wetland, China
title_full Assessment of the distribution, bioavailability and ecological risks of heavy metals in the lake water and surface sediments of the Caohai plateau wetland, China
title_fullStr Assessment of the distribution, bioavailability and ecological risks of heavy metals in the lake water and surface sediments of the Caohai plateau wetland, China
title_full_unstemmed Assessment of the distribution, bioavailability and ecological risks of heavy metals in the lake water and surface sediments of the Caohai plateau wetland, China
title_short Assessment of the distribution, bioavailability and ecological risks of heavy metals in the lake water and surface sediments of the Caohai plateau wetland, China
title_sort assessment of the distribution, bioavailability and ecological risks of heavy metals in the lake water and surface sediments of the caohai plateau wetland, china
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5734908/
https://www.ncbi.nlm.nih.gov/pubmed/29253896
http://dx.doi.org/10.1371/journal.pone.0189295
work_keys_str_mv AT hujing assessmentofthedistributionbioavailabilityandecologicalrisksofheavymetalsinthelakewaterandsurfacesedimentsofthecaohaiplateauwetlandchina
AT zhoushaoqi assessmentofthedistributionbioavailabilityandecologicalrisksofheavymetalsinthelakewaterandsurfacesedimentsofthecaohaiplateauwetlandchina
AT wupan assessmentofthedistributionbioavailabilityandecologicalrisksofheavymetalsinthelakewaterandsurfacesedimentsofthecaohaiplateauwetlandchina
AT qukunjie assessmentofthedistributionbioavailabilityandecologicalrisksofheavymetalsinthelakewaterandsurfacesedimentsofthecaohaiplateauwetlandchina