TY - JOUR
T1 - Relation between different metal pollution criteria in sediments and its contribution on assessing toxicity
AU - Alves, Cristina M.
AU - Ferreira, Carlos M. H.
AU - Soares, Helena M.V.M.
N1 - Funding Information:
This work was performed in the framework of the financing with reference LAQV (UID/QUI/50006/2013 - POCI/01/0145/FEDER/007265) with financial support from FCT/MEC through national funds and co-financed by FEDER, under the Partnership Agreement PT2020.
Funding Information:
This work was performed in the framework of the financing with reference LAQV ( UID/QUI/50006/2013 - POCI/01/0145/FEDER/007265 ) with financial support from FCT/MEC through national funds and co-financed by FEDER , under the Partnership Agreement PT2020.
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/10
Y1 - 2018/10
N2 - Several tools have been developed and applied to evaluate the metal pollution status of sediments and predict their potential ecological risk assessment. To date, a comprehensive relationship between the information given by these sediment tools for predicting metal bioavailability and the effective toxicity observed is lacking. In this work, the possible inter-correlations between the data outcoming from using several qualitative evaluation tools of the sediment contamination (contamination factor, CF, the enrichment factor, EF, or the geoaccumulation index, Igeo), metal speciation on sediments (evaluated by the modified BCR sequential extraction procedure) and free metal concentrations in pore waters were studied. It was also our aim to evaluate if these assessment tools could be used for predicting the pore waters toxicity data as toxicity proxy. Principal component analysis and cluster analysis revealed that two quality indices used (CF and EF) were highly correlatable with the more labile fractions from BCR sediment speciation. However, neither of these parameters did correlate with the toxicity of pore waters measured by the chronic toxicity (72 h) in Pseudokirchneriella subcapitata. In contrast, the toxic effects of the given total metal load in sediments were better evaluated by using an additive metal approach using pore water free metal concentrations.
AB - Several tools have been developed and applied to evaluate the metal pollution status of sediments and predict their potential ecological risk assessment. To date, a comprehensive relationship between the information given by these sediment tools for predicting metal bioavailability and the effective toxicity observed is lacking. In this work, the possible inter-correlations between the data outcoming from using several qualitative evaluation tools of the sediment contamination (contamination factor, CF, the enrichment factor, EF, or the geoaccumulation index, Igeo), metal speciation on sediments (evaluated by the modified BCR sequential extraction procedure) and free metal concentrations in pore waters were studied. It was also our aim to evaluate if these assessment tools could be used for predicting the pore waters toxicity data as toxicity proxy. Principal component analysis and cluster analysis revealed that two quality indices used (CF and EF) were highly correlatable with the more labile fractions from BCR sediment speciation. However, neither of these parameters did correlate with the toxicity of pore waters measured by the chronic toxicity (72 h) in Pseudokirchneriella subcapitata. In contrast, the toxic effects of the given total metal load in sediments were better evaluated by using an additive metal approach using pore water free metal concentrations.
KW - BCR sequential extraction
KW - Contamination factor
KW - Enrichment factor
KW - Geoaccumulation index
KW - Toxicity of pore waters
UR - http://www.scopus.com/inward/record.url?scp=85049338796&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2018.05.072
DO - 10.1016/j.chemosphere.2018.05.072
M3 - Article
C2 - 29885505
AN - SCOPUS:85049338796
SN - 0045-6535
VL - 208
SP - 390
EP - 398
JO - Chemosphere
JF - Chemosphere
ER -