• Je něco špatně v tomto záznamu ?

Poly- and per-fluoroalkyl compounds in sediments of the Laurentian Great Lakes: Loadings, temporal trends, and sources determined by positive matrix factorization

ER. Christensen, R. Zhang, G. Codling, JP. Giesy, A. Li,

. 2019 ; 255 (Pt 2) : 113166. [pub] 20190914

Jazyk angličtina Země Velká Británie

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/bmc20005857

A recent data set for 22 poly- and per-fluorinated compounds (PFASs) in Ponar grab samples of surface sediments and cores from the Great Lakes of North America was examined for concentrations, loads, correlations with geographical coordinates and depth (time), and for sources. Correlations were determined by multivariate regression analyses. Source apportionment of PFASs was carried out by positive matrix factorization (PMF) for two cores from Lake Ontario. For the five lakes together, the total load of PFASs in sediments was estimated to be 245 ± 24 tonnes, which is about half the load for total PCBs. The recent annual loading was 1812 ± 320 kg/yr. Concentrations and inventories of PFASs were greatest in Lakes Erie and Ontario. Since 1947, concentrations of perfluorooctane sulfonic acid (PFOS) in ten cores have increased exponentially as a function of time with doubling times between 10 and 54 yr and have leveled off in three cores since 2000. PMF demonstrated an effective grouping of two particle-associated factors, characterized mainly by longer-chain PFASs (C ≥ 8) and two other factors of mainly shorter-chain compounds (C ≤ 6). Two factors feature only one dominant compound: factor 1, PFOS, and factor 3, perfluorobutane sulfonic acid (PFBS). Of all factors, factor 3 with PFBS has the largest contribution (47.8%). Significant scores for perfluorohexane sulfonic acid (PFHxS) and PFBS, along with flat or decreasing PFOS contributions since 2003, indicate that the replacement of PFOS with these compounds is beginning to take effect in the environment.

Citace poskytuje Crossref.org

000      
00000naa a2200000 a 4500
001      
bmc20005857
003      
CZ-PrNML
005      
20200527090940.0
007      
ta
008      
200511s2019 xxk f 000 0|eng||
009      
AR
024    7_
$a 10.1016/j.envpol.2019.113166 $2 doi
035    __
$a (PubMed)31561035
040    __
$a ABA008 $b cze $d ABA008 $e AACR2
041    0_
$a eng
044    __
$a xxk
100    1_
$a Christensen, Erik R $u Department of Civil and Environmental Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA. Electronic address: erc@uwm.edu.
245    10
$a Poly- and per-fluoroalkyl compounds in sediments of the Laurentian Great Lakes: Loadings, temporal trends, and sources determined by positive matrix factorization / $c ER. Christensen, R. Zhang, G. Codling, JP. Giesy, A. Li,
520    9_
$a A recent data set for 22 poly- and per-fluorinated compounds (PFASs) in Ponar grab samples of surface sediments and cores from the Great Lakes of North America was examined for concentrations, loads, correlations with geographical coordinates and depth (time), and for sources. Correlations were determined by multivariate regression analyses. Source apportionment of PFASs was carried out by positive matrix factorization (PMF) for two cores from Lake Ontario. For the five lakes together, the total load of PFASs in sediments was estimated to be 245 ± 24 tonnes, which is about half the load for total PCBs. The recent annual loading was 1812 ± 320 kg/yr. Concentrations and inventories of PFASs were greatest in Lakes Erie and Ontario. Since 1947, concentrations of perfluorooctane sulfonic acid (PFOS) in ten cores have increased exponentially as a function of time with doubling times between 10 and 54 yr and have leveled off in three cores since 2000. PMF demonstrated an effective grouping of two particle-associated factors, characterized mainly by longer-chain PFASs (C ≥ 8) and two other factors of mainly shorter-chain compounds (C ≤ 6). Two factors feature only one dominant compound: factor 1, PFOS, and factor 3, perfluorobutane sulfonic acid (PFBS). Of all factors, factor 3 with PFBS has the largest contribution (47.8%). Significant scores for perfluorohexane sulfonic acid (PFHxS) and PFBS, along with flat or decreasing PFOS contributions since 2003, indicate that the replacement of PFOS with these compounds is beginning to take effect in the environment.
650    _2
$a kyseliny alkansulfonové $7 D017738
650    12
$a monitorování životního prostředí $7 D004784
650    _2
$a fluorokarbony $7 D005466
650    _2
$a geologické sedimenty $7 D019015
650    _2
$a jezera $7 D060106
650    _2
$a kyseliny sulfonové $x analýza $7 D013451
650    _2
$a chemické látky znečišťující vodu $x analýza $7 D014874
651    _2
$a oblast Velkých jezer $7 D006114
651    _2
$a Severní Amerika $7 D009656
651    _2
$a Ontario $7 D009864
655    _2
$a časopisecké články $7 D016428
700    1_
$a Zhang, Ruijie $u School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, USA; School of Marine Sciences, Guangxi University, Nanning 530004, China.
700    1_
$a Codling, Garry $u Research Centre for Contaminants in the Environment, Pavilion 29, Masaryk University, Brno, Czech Republic.
700    1_
$a Giesy, John P $u Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada; Department of Environmental Science, Baylor University, Waco, TX, United States.
700    1_
$a Li, An $u School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, USA.
773    0_
$w MED00001554 $t Environmental pollution (Barking, Essex : 1987) $x 1873-6424 $g Roč. 255, č. Pt 2 (2019), s. 113166
856    41
$u https://pubmed.ncbi.nlm.nih.gov/31561035 $y Pubmed
910    __
$a ABA008 $b sig $c sign $y a $z 0
990    __
$a 20200511 $b ABA008
991    __
$a 20200527090937 $b ABA008
999    __
$a ok $b bmc $g 1524715 $s 1095913
BAS    __
$a 3
BAS    __
$a PreBMC
BMC    __
$a 2019 $b 255 $c Pt 2 $d 113166 $e 20190914 $i 1873-6424 $m Environmental pollution (1987) $n Environ. pollut. (1987) $x MED00001554
LZP    __
$a Pubmed-20200511

Najít záznam

Citační ukazatele

Možnosti archivace