Identifying further chemicals of emerging arctic concern based on ‘in silico’ screening of chemical inventories
In the past 12 years several studies have screened lists of thousands of chemicals available in the industrial chemical inventories of the European Union, the USA and Canada with the goal of identifying and prioritizing chemicals which are persistent (P), bioaccumulative (B) and toxic (T). Most stud...
Ausführliche Beschreibung
Autor*in: |
Derek Muir [verfasserIn] Xianming Zhang [verfasserIn] Cynthia A. de Wit [verfasserIn] Katrin Vorkamp [verfasserIn] Simon Wilson [verfasserIn] |
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E-Artikel |
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Sprache: |
Englisch |
Erschienen: |
2019 |
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Übergeordnetes Werk: |
In: Emerging Contaminants - KeAi Communications Co., Ltd., 2016, 5(2019), Seite 201-210 |
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Übergeordnetes Werk: |
volume:5 ; year:2019 ; pages:201-210 |
Links: |
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DOI / URN: |
10.1016/j.emcon.2019.05.005 |
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Katalog-ID: |
DOAJ053701984 |
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Identifying further chemicals of emerging arctic concern based on ‘in silico’ screening of chemical inventories |
abstract |
In the past 12 years several studies have screened lists of thousands of chemicals available in the industrial chemical inventories of the European Union, the USA and Canada with the goal of identifying and prioritizing chemicals which are persistent (P), bioaccumulative (B) and toxic (T). Most studies have selected chemicals based on whether their predicted P and B properties and their long-range transport potential exceed guideline thresholds for evaluation of persistent organic pollutants (POPs). A major goal of this study was to review this recent literature on computer-based or ‘in silico’ screening for POPs. A second goal was to review other approaches for finding previously unidentified chemicals of concern including targeted and non-target analytical approaches that might use lists of suspect chemicals developed from ‘in silico’ screening studies. Eight studies were reviewed along with several others which examined the screening process and its uncertainties. From these studies we assembled a list of 3421 chemicals, after removing duplicates and substances already on the Stockholm Convention on POPs. About 52% of these were halogenated, while 48% consisted of a broad range of non-halogenated organics. This list was then further analysed by calculating an overall “POPs score” for transport and accumulation in the Arctic for each substance using predicted partition coefficients, overall persistence, transfer efficiency, and bioaccumulation factor. A shorter list of twenty-five substances was developed based on their POPs score ranking. These substances had not been previously analysed in environmental media but were nevertheless on current or recent chemical inventories indicating significant commercial use. Keywords: Persistent organic pollutants, Persistence, Bioaccumulation, Long-range transport, Non-target screening |
abstractGer |
In the past 12 years several studies have screened lists of thousands of chemicals available in the industrial chemical inventories of the European Union, the USA and Canada with the goal of identifying and prioritizing chemicals which are persistent (P), bioaccumulative (B) and toxic (T). Most studies have selected chemicals based on whether their predicted P and B properties and their long-range transport potential exceed guideline thresholds for evaluation of persistent organic pollutants (POPs). A major goal of this study was to review this recent literature on computer-based or ‘in silico’ screening for POPs. A second goal was to review other approaches for finding previously unidentified chemicals of concern including targeted and non-target analytical approaches that might use lists of suspect chemicals developed from ‘in silico’ screening studies. Eight studies were reviewed along with several others which examined the screening process and its uncertainties. From these studies we assembled a list of 3421 chemicals, after removing duplicates and substances already on the Stockholm Convention on POPs. About 52% of these were halogenated, while 48% consisted of a broad range of non-halogenated organics. This list was then further analysed by calculating an overall “POPs score” for transport and accumulation in the Arctic for each substance using predicted partition coefficients, overall persistence, transfer efficiency, and bioaccumulation factor. A shorter list of twenty-five substances was developed based on their POPs score ranking. These substances had not been previously analysed in environmental media but were nevertheless on current or recent chemical inventories indicating significant commercial use. Keywords: Persistent organic pollutants, Persistence, Bioaccumulation, Long-range transport, Non-target screening |
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In the past 12 years several studies have screened lists of thousands of chemicals available in the industrial chemical inventories of the European Union, the USA and Canada with the goal of identifying and prioritizing chemicals which are persistent (P), bioaccumulative (B) and toxic (T). Most studies have selected chemicals based on whether their predicted P and B properties and their long-range transport potential exceed guideline thresholds for evaluation of persistent organic pollutants (POPs). A major goal of this study was to review this recent literature on computer-based or ‘in silico’ screening for POPs. A second goal was to review other approaches for finding previously unidentified chemicals of concern including targeted and non-target analytical approaches that might use lists of suspect chemicals developed from ‘in silico’ screening studies. Eight studies were reviewed along with several others which examined the screening process and its uncertainties. From these studies we assembled a list of 3421 chemicals, after removing duplicates and substances already on the Stockholm Convention on POPs. About 52% of these were halogenated, while 48% consisted of a broad range of non-halogenated organics. This list was then further analysed by calculating an overall “POPs score” for transport and accumulation in the Arctic for each substance using predicted partition coefficients, overall persistence, transfer efficiency, and bioaccumulation factor. A shorter list of twenty-five substances was developed based on their POPs score ranking. These substances had not been previously analysed in environmental media but were nevertheless on current or recent chemical inventories indicating significant commercial use. Keywords: Persistent organic pollutants, Persistence, Bioaccumulation, Long-range transport, Non-target screening |
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Identifying further chemicals of emerging arctic concern based on ‘in silico’ screening of chemical inventories |
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