Review and evaluation of a chiral enrichment model for chlordane enantiomers in the environment
Chlordane is an organochlorine pesticide that contains a mixture of components, some of which are chiral. Analysis of enantiomers can provide insights into the mechanisms of their sources, pathway, and fate. The objectives of this work were: (i) to review the published literature that reported chlor...
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crcansciencepubl:10.1139/er-2016-0015 2023-12-17T10:49:02+01:00 Review and evaluation of a chiral enrichment model for chlordane enantiomers in the environment Singh, Kavita Hegeman, Wim J.M. Laane, Remi W.P.M. Chan, Hing Man 2016 http://dx.doi.org/10.1139/er-2016-0015 http://www.nrcresearchpress.com/doi/full-xml/10.1139/er-2016-0015 http://www.nrcresearchpress.com/doi/pdf/10.1139/er-2016-0015 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Environmental Reviews volume 24, issue 4, page 363-376 ISSN 1181-8700 1208-6053 General Environmental Science journal-article 2016 crcansciencepubl https://doi.org/10.1139/er-2016-0015 2023-11-19T13:38:58Z Chlordane is an organochlorine pesticide that contains a mixture of components, some of which are chiral. Analysis of enantiomers can provide insights into the mechanisms of their sources, pathway, and fate. The objectives of this work were: (i) to review the published literature that reported chlordane enantiomer concentrations in various environmental compartments; (ii) to evaluate the applicability of a model developed by Hegeman and Laane (2002) for predicting the relative distribution of various chiral pesticides in the environment. This model predicts that enantiomer deviation increases in the following order: air, water, soil, molluscs, fish/birds, marine mammals, specific tissues, and enzymes; (iii) to determine the relative ranking of plants within the model. All data were converted into an enantiomer fraction and aggregated by environmental compartment using bootstrap averaging to compare to model predictions. Enantiomer distributions of cis-chlordane, trans-chlordane, oxychlordane, and heptachlor exo-epoxide were reported in soil, air, water/sediments, plants, and animals. Based on aggregated average estimates for enantiomer fraction, the deviation from racemic increased in the following order for cis-chlordane: water/sediments = lower trophic aquatic organisms < air < fish < soil < plants (all combined) < seal < polar bear < bird < whale; for trans-chlordane: fish < water/sediments < lower trophic aquatic organisms < air < soil < plants (all combined) < seal < whales < bird < polar bear; and for heptachlor exo-epoxide: plants (all combined) < fish < soil = whale < water/sediments < bird < air < seal < polar bear. Depending on the species used to represent marine mammals, the Spearman’s rank-order correlation coefficients of observed data against model predictions were + 0.75 or + 0.84 for cis-chlordane, + 0.41 or + 0.49 for ... Article in Journal/Newspaper polar bear Canadian Science Publishing (via Crossref) Environmental Reviews 24 4 363 376 |
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General Environmental Science Singh, Kavita Hegeman, Wim J.M. Laane, Remi W.P.M. Chan, Hing Man Review and evaluation of a chiral enrichment model for chlordane enantiomers in the environment |
topic_facet |
General Environmental Science |
description |
Chlordane is an organochlorine pesticide that contains a mixture of components, some of which are chiral. Analysis of enantiomers can provide insights into the mechanisms of their sources, pathway, and fate. The objectives of this work were: (i) to review the published literature that reported chlordane enantiomer concentrations in various environmental compartments; (ii) to evaluate the applicability of a model developed by Hegeman and Laane (2002) for predicting the relative distribution of various chiral pesticides in the environment. This model predicts that enantiomer deviation increases in the following order: air, water, soil, molluscs, fish/birds, marine mammals, specific tissues, and enzymes; (iii) to determine the relative ranking of plants within the model. All data were converted into an enantiomer fraction and aggregated by environmental compartment using bootstrap averaging to compare to model predictions. Enantiomer distributions of cis-chlordane, trans-chlordane, oxychlordane, and heptachlor exo-epoxide were reported in soil, air, water/sediments, plants, and animals. Based on aggregated average estimates for enantiomer fraction, the deviation from racemic increased in the following order for cis-chlordane: water/sediments = lower trophic aquatic organisms < air < fish < soil < plants (all combined) < seal < polar bear < bird < whale; for trans-chlordane: fish < water/sediments < lower trophic aquatic organisms < air < soil < plants (all combined) < seal < whales < bird < polar bear; and for heptachlor exo-epoxide: plants (all combined) < fish < soil = whale < water/sediments < bird < air < seal < polar bear. Depending on the species used to represent marine mammals, the Spearman’s rank-order correlation coefficients of observed data against model predictions were + 0.75 or + 0.84 for cis-chlordane, + 0.41 or + 0.49 for ... |
format |
Article in Journal/Newspaper |
author |
Singh, Kavita Hegeman, Wim J.M. Laane, Remi W.P.M. Chan, Hing Man |
author_facet |
Singh, Kavita Hegeman, Wim J.M. Laane, Remi W.P.M. Chan, Hing Man |
author_sort |
Singh, Kavita |
title |
Review and evaluation of a chiral enrichment model for chlordane enantiomers in the environment |
title_short |
Review and evaluation of a chiral enrichment model for chlordane enantiomers in the environment |
title_full |
Review and evaluation of a chiral enrichment model for chlordane enantiomers in the environment |
title_fullStr |
Review and evaluation of a chiral enrichment model for chlordane enantiomers in the environment |
title_full_unstemmed |
Review and evaluation of a chiral enrichment model for chlordane enantiomers in the environment |
title_sort |
review and evaluation of a chiral enrichment model for chlordane enantiomers in the environment |
publisher |
Canadian Science Publishing |
publishDate |
2016 |
url |
http://dx.doi.org/10.1139/er-2016-0015 http://www.nrcresearchpress.com/doi/full-xml/10.1139/er-2016-0015 http://www.nrcresearchpress.com/doi/pdf/10.1139/er-2016-0015 |
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polar bear |
genre_facet |
polar bear |
op_source |
Environmental Reviews volume 24, issue 4, page 363-376 ISSN 1181-8700 1208-6053 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/er-2016-0015 |
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Environmental Reviews |
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24 |
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4 |
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363 |
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376 |
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1785573383788822528 |