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Hao, Y., Li, Y., Han, X., Wang, T., Yang, R., Wang, P., . . . Jiang, G. (2019). Air monitoring of polychlorinated biphenyls, polybrominated diphenyl ethers and organochlorine pesticides in West Antarctica during 2011-2017: Concentrations, temporal trends and potential sources. Environmental Pollution, 249, 381-389
Open this publication in new window or tab >>Air monitoring of polychlorinated biphenyls, polybrominated diphenyl ethers and organochlorine pesticides in West Antarctica during 2011-2017: Concentrations, temporal trends and potential sources
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2019 (English)In: Environmental Pollution, ISSN 0269-7491, E-ISSN 1873-6424, Vol. 249, p. 381-389Article in journal (Refereed) Published
Abstract [en]

Annual air samples were collected at various sites in the Fildes Peninsula, West Antarctica from December 2010 to January 2018 using XAD-2 resin passive air samplers to investigate concentrations, temporal trends and potential sources of persistent organic pollutants (POPs) in Antarctic air. Relatively low concentrations of polychlorinated biphenyls (PCBs) (Σ19PCBs: 1.5-29.7 pg/m3), polybrominated diphenyl ethers (PBDEs) (Σ12PBDEs: 0.2-2.9 pg/m3) and organochlorine pesticides (OCPs) (Σ13OCPs: 101-278 pg/m3) were found in the atmosphere of West Antarctica. PCB-11, BDE-47 and hexachlorobenzene (HCB) were the predominant compounds in the atmosphere. The concentrations of PCBs, HCHs, DDTs and endosulfans were found to show decreasing temporal trends, whereas uniform temporal trends were observed for HCB. The atmospheric half-life values for PCBs, HCHs, DDTs and endosulfans in Antarctic air were estimated for the first time, using regressions of the natural logarithm of the concentrations versus the number of years, obtaining the values of 2.0, 2.0, 2.4 and 1.2 year, respectively. An increasing ratio of α-HCH/γ-HCH indicated long residence time for α-HCH and possible transformation of γ-HCH to α-HCH in the atmosphere. The ratios of p,p'-DDT/p,p'-DDE were mostly lower than unity in this study, which could be attributed to aged sources. It was found that long-range atmospheric transport was still considered to be the main contributing factor to the atmospheric levels of the POPs in West Antarctica whereas the contribution of human activities at the Chinese Great Wall Station was minor. The results of this study give a view on the most recent temporal trends and provide new insights regarding the occurrence of various POPs in the Antarctic atmosphere.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Antarctica, Atmosphere, POPs, Passive air sampling, Temporal trends
National Category
Environmental Sciences
Identifiers
urn:nbn:se:oru:diva-74571 (URN)10.1016/j.envpol.2019.03.039 (DOI)000471081300042 ()30913437 (PubMedID)2-s2.0-85063617873 (Scopus ID)
Note

Funding Agencies:

National Basic Research Program of China  2015CB453101 

National Natural Science Foundation of China  21477155  91743206  21777186  41676183  21621064 

Strategic Priority Research Program of the Chinese Academy of Sciences  XDB14010100 

Available from: 2019-06-04 Created: 2019-06-04 Last updated: 2019-07-23Bibliographically approved
Persson, J., Wang, T. & Hagberg, J. (2019). Indoor air quality of newly built low-energy preschools: Are chemical emissions reduced in houses with eco-labelled building materials?. Indoor and Built Environment, 28(4), 506-519
Open this publication in new window or tab >>Indoor air quality of newly built low-energy preschools: Are chemical emissions reduced in houses with eco-labelled building materials?
2019 (English)In: Indoor and Built Environment, ISSN 1420-326X, Vol. 28, no 4, p. 506-519Article in journal (Refereed) Published
Abstract [en]

The use of an airtight frame in low-energy buildings could increase the risk of health-related problems, such as allergies and sick building syndromes (SBS), associated with chemical emissions from building materials, especially if the ventilation system is not functioning properly. In this study, the indoor air quality (IAQ) was investigated in newly built low-energy and conventional preschools by monitoring the indoor air temperature, relative humidity, particle-size distribution and levels of carbon dioxide (CO2), nitrogen dioxide (NO2), formaldehyde and total volatile organic compounds (TVOC). The thermal comfort was satisfactory in all preschools, with average indoor air temperature and a relative humidity at 21.4C and 36%, respectively. The highest levels of TVOC (range: 130–1650 mg/m3 toluene equivalents) and formaldehyde (range: 1.9–28.8 mg/m3) occurred during the first sampling period associated with strong emissions from building materials. However, those preschools constructed with environmental friendly building materials (such as Swan Eco-label) had lower initial TVOC levels compared to those preschools constructed with conventional building materials. The IAQ and indoor chemical emissions were also strongly dependent on the functioning of the ventilation system. Preliminary risk assessment indicated that exposure to acrolein and crotonaldehyde might lead to respiratory-tract irritation among occupants.

Place, publisher, year, edition, pages
Sage Publications, 2019
Keywords
Indoor air quality, Low-energy preschool, Ventilation, Indoor air pollutants, Temporal trends, Maximum cumulative ratio, Volatile organic compounds
National Category
Analytical Chemistry Environmental Sciences
Identifiers
urn:nbn:se:oru:diva-70261 (URN)10.1177/1420326X18792600 (DOI)000461388600007 ()2-s2.0-85052561103 (Scopus ID)
Note

Funding Agencies:

Örebro University  

Healthy Building Forum (HBF)  

Department of Occupational and Environmental Medicine (AMM) at Örebro University Hospital 

Available from: 2018-11-21 Created: 2018-11-21 Last updated: 2019-06-19Bibliographically approved
Cao, H., Zhou, Z., Wang, L., Liu, G., Sun, Y., Wang, Y., . . . Liang, Y. (2019). Screening of Potential PFOS Alternatives To Decrease Liver Bioaccumulation: Experimental and Computational Approaches. Environmental Science and Technology, 53(5), 2811-2819
Open this publication in new window or tab >>Screening of Potential PFOS Alternatives To Decrease Liver Bioaccumulation: Experimental and Computational Approaches
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2019 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 53, no 5, p. 2811-2819Article in journal (Refereed) Published
Abstract [en]

Perfluorooctanesulfonate (PFOS) is a persistent organic pollutant with significant bioaccumulation potential in liver tissues. Exposure to PFOS could cause increase of liver weight, induce adenomas of the liver, and cause hepatomegaly. Alternatives of PFOS might be designed and synthesized that have significantly lower liver bioaccumulation. In this study, we conducted animal exposure experiments to investigate tissue accumulations of 14 per- and polyfluoroalkyl substances. Correlation analysis demonstrated that accumulation of the compounds in rat liver had strong correlations with their binding affinities of liver fatty acid binding protein (LFABP). Thus, we combined a quantitative structure-activity relationship model with molecular dynamics (MD) simulations to develop computational models to predict the LFABP binding affinities of two newly synthesized alternatives, perfluorodecalin-2-sulfonic acid and N-diperfluorobutanoic acid. The binding characteristics of the PFOS alternatives for LFABP were elaborated to explore how the different structural modifications of molecules influenced the underlying binding mechanisms. Subsequent animal experiments demonstrated that the binding free energy calculations based on the MD simulations provided a good indicator to reflect the relative degree of liver accumulation of the PFOS alternatives in the same exposure doses and durations. Our findings from the combination of experimental exposure and computational model can provide helpful information to design potential alternatives of PFOS with weak LFABP binding capability and low liver accumulation.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019
National Category
Pharmaceutical Sciences Environmental Sciences
Identifiers
urn:nbn:se:oru:diva-72792 (URN)10.1021/acs.est.8b05564 (DOI)000460709100057 ()30735364 (PubMedID)2-s2.0-85062326121 (Scopus ID)
Note

Funding Agencies:

Strategic Priority Research Program of the Chinese Academy of Sciences  XDB14030501 

National Nature Science Foundation of China  21477049  21507044  21777061  21806058 

Available from: 2019-02-26 Created: 2019-02-26 Last updated: 2019-03-25Bibliographically approved
Persson, J., Wang, T. & Hagberg, J. (2019). Temporal Trends of Decabromodiphenyl Ether and Emerging Brominated Flame Retardants in Dust, Air and Window Surfaces of Newly Built Low-Energy Preschools. Indoor Air, 29(2), 263-275
Open this publication in new window or tab >>Temporal Trends of Decabromodiphenyl Ether and Emerging Brominated Flame Retardants in Dust, Air and Window Surfaces of Newly Built Low-Energy Preschools
2019 (English)In: Indoor Air, ISSN 0905-6947, E-ISSN 1600-0668, Vol. 29, no 2, p. 263-275Article in journal (Refereed) Published
Abstract [en]

The envelope of low-energy buildings is generally constructed with significant amounts of plastics, sealants and insulation materials that are known to contain various chemical additives to improve specific functionalities. A commonly used group of additives are flame retardants to prevent the spread of fire. In this study, decabromodiphenyl ether (BDE-209) and fourteen emerging brominated flame retardants (BFRs) were analyzed in indoor dust, air and on the window surface of newly built low-energy preschools to study their occurrence and distribution. BDE-209 and decabromodiphenyl ethane (DBDPE) were frequently detected in the indoor dust (BDE-209: <4.1-1200 ng/g, DBDPE: <2.2-420 ng/g) and on window surfaces (BDE-209: <1000-20 000 pg/m2 , DBDPE: <34-5900 pg/m2 ) while the other thirteen BFRs were found in low levels (dust: <0.0020-5.2 ng/g, window surface: 0.0078-35 pg/m2 ). In addition, the detection frequencies of BFRs in the indoor air were low in all preschools. Interestingly, the dust levels of BDE-209 and DBDPE were found to be lower in the environmentally certified low-energy preschools, which could be attributed to stricter requirements on the chemical content in building materials and products. However, an increase of some BFR levels in dust was observed which could imply continuous emissions or introduction of new sources.

Place, publisher, year, edition, pages
Blackwell Publishing, 2019
Keywords
Brominated flame retardants, indoor dust, low-energy buildings, preschool, semivolatile organic compounds, window wipe
National Category
Building Technologies
Identifiers
urn:nbn:se:oru:diva-71193 (URN)10.1111/ina.12528 (DOI)000459637200010 ()30578573 (PubMedID)2-s2.0-85060170952 (Scopus ID)
Note

Funding Agencies:

Healthy Building Forum  

Department of Occupational and Environmental Medicine, Örebro University Hospital  

Örebro University

Available from: 2019-01-08 Created: 2019-01-08 Last updated: 2019-06-18Bibliographically approved
Hao, Y., Li, Y., Wang, T., Hu, Y., Sun, H., Matsiko, J., . . . Zhang, Q. (2018). Distribution, seasonal variation and inhalation risks of polychlorinated dibenzo-p-dioxins and dibenzofurans, polychlorinated biphenyls and polybrominated diphenyl ethers in the atmosphere of Beijing, China. Environmental Geochemistry and Health, 40(5), 1907-1918
Open this publication in new window or tab >>Distribution, seasonal variation and inhalation risks of polychlorinated dibenzo-p-dioxins and dibenzofurans, polychlorinated biphenyls and polybrominated diphenyl ethers in the atmosphere of Beijing, China
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2018 (English)In: Environmental Geochemistry and Health, ISSN 0269-4042, E-ISSN 1573-2983, Vol. 40, no 5, p. 1907-1918Article in journal (Refereed) Published
Abstract [en]

Spatial distribution, seasonal variation and potential inhalation risks of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) were investigated in the atmosphere of Beijing, using passive air samplers equipped with polyurethane foam disks. Concentrations of ΣPCDD/Fs, ΣPCBs and ΣPBDEs ranged from 8.4 to 179 fg WHO2005-TEQ/m(3), 38.6-139 and 1.5-176 pg/m(3), respectively. PCDFs showed higher air concentrations than those of PCDDs, indicating the influence of industrial activities and other combustion processes. The non-Aroclor congener, PCB-11, was detected in air (12.3-99.4 pg/m(3)) and dominated the PCB congener profiles (61.7-71.5% to ∑PCBs). The congener patterns of PBDEs showed signatures from both penta-BDE and octa-BDE products. Levels of PCDD/Fs, PCBs and PBDEs at the industrial and residential sites were higher than those at rural site, indicating human activities in urban area as potential sources. Higher air concentrations of PCDD/Fs, PCBs and PBDEs were observed in summer, which could be associated with atmospheric deposition process, re-volatilization from soil surface and volatilization from use of technical products, respectively. Results of inhalation exposure and cancer risk showed that atmospheric PCDD/Fs, dioxin-like PCBs and PBDEs did not cause high risks to the local residents of Beijing. This study provides further aid in evaluating emission sources, influencing factors and potential inhalation risks of the persistent organic pollutants to human health in mega-cities of China.

Place, publisher, year, edition, pages
Springer Netherlands, 2018
Keywords
Beijing air, Inhalation risk, PBDEs, PCBs, PCDD/Fs, Passive air sampling, Seasonal variation
National Category
Occupational Health and Environmental Health Environmental Sciences
Identifiers
urn:nbn:se:oru:diva-60909 (URN)10.1007/s10653-017-9961-2 (DOI)000452158700016 ()28447232 (PubMedID)2-s2.0-85018352378 (Scopus ID)
Note

Funding Agencies:

National Natural Science Foundation of China  21277165  21477156  21477155 

National Basic Research Program of China  2015CB453101 

Strategic Priority Research Program of the Chinese Academy of Sciences  XDB14010100 

Available from: 2017-09-18 Created: 2017-09-18 Last updated: 2019-01-07Bibliographically approved
Persson, J., Wang, T. & Hagberg, J. (2018). Organophosphate flame retardants and plasticizers in indoor dust, air and window wipes in newly built low-energy preschools. Science of the Total Environment, 628-629, 159-168
Open this publication in new window or tab >>Organophosphate flame retardants and plasticizers in indoor dust, air and window wipes in newly built low-energy preschools
2018 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 628-629, p. 159-168Article in journal (Refereed) Published
Abstract [en]

The construction of extremely airtight and energy efficient low-energy buildings is achieved by using functional building materials, such as age-resistant plastics, insulation, adhesives, and sealants. Additives such as organophosphate flame retardants (OPFRs) can be added to some of these building materials as flame retardants and plasticizers. Some OPFRs are considered persistent, bioaccumulative and toxic. Therefore, in this pilot study, the occurrence and distribution of nine OPFRs were determined for dust, air, and window wipe samples collected in newly built low-energy preschools with and without environmental certifications. Tris(1,3-dichloroisopropyl) phosphate (TDCIPP) and triphenyl phosphate (TPHP) were detected in all indoor dust samples at concentrations ranging from 0.014 to 10 μg/g and 0.0069 to 79 μg/g, respectively. Only six OPFRs (predominantly chlorinated OPFRs) were detected in the indoor air. All nine OPFRs were found on the window surfaces and the highest concentrations, which occurred in the reference preschool, were measured for 2-ethylhexyl diphenyl phosphate (EHDPP) (maximum concentration: 1500 ng/m2). Interestingly, the OPFR levels in the environmental certified low-energy preschools were lower than those in the reference preschool and the non-certified low-energy preschool, probably attributed to the usage of environmental friendly and low-emitting building materials, interior decorations, and consumer products.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Organophosphate flame retardant, Plasticizer, Low-energy preschool, Environmental certified building, Indoor dust, Surface wipe
National Category
Analytical Chemistry Environmental Sciences
Research subject
Environmental Chemistry
Identifiers
urn:nbn:se:oru:diva-65565 (URN)10.1016/j.scitotenv.2018.02.053 (DOI)000432462000018 ()29432927 (PubMedID)2-s2.0-85041523162 (Scopus ID)
Note

Funding Agencies:

Healthy Building Forum (HBF)

Örebro University

Department of Occupational and Environ-mental Medicine at Örebro University Hospital

Available from: 2018-03-08 Created: 2018-03-08 Last updated: 2018-11-21Bibliographically approved
Zhang, H., Vestergren, R., Wang, T., Yu, J., Jiang, G. & Herzke, D. (2017). Geographical Differences in Dietary Exposure to Perfluoroalkyl Acids between Manufacturing and Application Regions in China. Environmental Science and Technology, 51(10), 5747-5755
Open this publication in new window or tab >>Geographical Differences in Dietary Exposure to Perfluoroalkyl Acids between Manufacturing and Application Regions in China
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2017 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 51, no 10, p. 5747-5755Article in journal (Refereed) Published
Abstract [en]

Emissions of perfluoroalkyl acids (PFAAs) have increased in China over the past decade, but human exposure pathways are poorly understood. Here we analyzed 15 PFAAs in commonly consumed food items and calculated body weight normalized dietary intake rates (estimated dietary intake, EDIs) in an area with ongoing PFAA production (Hubei province; n = 121) and an urbanized coastal area (Zhejiang province; n = 106). Geographical differences in concentrations were primarily observed for perfluorooctanesulfonic acid (PFOS) and perfluorohexanesulfonic acid (PFHxS) in animal food items and short chain PFAAs in vegetable food items. The average EDI of Sigma PFAAs for adults in Hubei (998 ng kg(-1) day(-1)) was more than 2 orders of magnitude higher than that in Zhejiang (9.03 ng kg-1 day(-1)). In Hubei province, the average EDI of PFOS for adults (87 ng kg(-1) day(-1)) was close to or exceeded advisory guidelines used in other countries indicating health risks for the population from long-term exposure. Yet, PFOS could only account for about 10% of the EDI of Sigma PFAAs in the Hubei province, which was dominated by short-chain PFAAs through consumption of vegetables. The large contribution of short-chain PFAAs to the total EDIs in manufacturing areas emphasize the need for improved exposure and hazard assessment tools of these substances.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017
National Category
Environmental Sciences
Identifiers
urn:nbn:se:oru:diva-57912 (URN)10.1021/acs.est.7b00246 (DOI)000401674400044 ()28387520 (PubMedID)
Note

Funding Agencies:

Chinese Academy of Sciences  GJHZ1202 

Norwegian Research Council for funding  209666/E40 

National Natural Science Foundation of China  21507113 

Natural Science Foundation of Zhejiang Province  LY15B070006 

Available from: 2017-06-08 Created: 2017-06-08 Last updated: 2017-09-18Bibliographically approved
Geng, D., Ericson Jogsten, I., Dunstan, J., Hagberg, J., Wang, T., Ruzzin, J., . . . van Bavel, B. (2016). Gas chromatography/atmospheric pressure chemical ionization/mass spectrometry for the analysis of organochlorine pesticides and polychlorinated biphenyls in human serum. Journal of Chromatography A, 1453, 88-98
Open this publication in new window or tab >>Gas chromatography/atmospheric pressure chemical ionization/mass spectrometry for the analysis of organochlorine pesticides and polychlorinated biphenyls in human serum
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2016 (English)In: Journal of Chromatography A, ISSN 0021-9673, E-ISSN 1873-3778, Vol. 1453, p. 88-98Article in journal (Refereed) Published
Abstract [en]

A method using a novel atmospheric pressure chemical ionization source for coupling gas chromatography (GC/APCI) to triple quadrupole mass spectrometry (MS/MS) for the determination of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) regulated by the Stockholm Convention is presented. One microliter injection of a six-point calibration curve of native PCBs and OCPs, ranging from 0.04 to 300 pg/μL, was performed. The relative standard deviation (RSD) of the relative response factors (RRFs) was less than 15% with a coefficient of determination (r2) &gt;0.995. Meanwhile, two calibration solutions (CS), CS 2 (0.4 pg/μL) and CS 3 (4 pg/μL) were analyzed to study the repeatability calculated for both area and RRFs. The RSD for RRF ranged from 3.1 to 16% and 3.6 to 5.5% for CS 2 and CS 3, respectively. The limits of detection (LOD) determined by peak-to-peak signal-to-noise ratio (S/N) of 3 were compared between the GC/APCI/MS/MS and a GC coupled to high resolution mass spectrometry (GC/HRMS) system. GC/APCI/MS/MS resulted in lower LOD for most of the compounds, except for PCB#74, cis-chlordane and trans-chlordane. GC/APCI/MS/MS and GC/HRMS were also compared by performing analysis on 75 human serum samples together with eight QA/QC serum samples. The comparison between GC/APCI/MS/MS system and GC/HRMS system for 16 of the targeted compounds was carried out. No statistically significant difference was discovered. Due to increased sensitivity and user friendly operation under atmospheric pressure, GC/APCI/MS/MS is a powerful alternative technique that can easily meet the specification of GC/HRMS.

Place, publisher, year, edition, pages
Amsterdam, Netherlands: Elsevier, 2016
Keywords
PCBs, OCPs, atmospheric pressure chemical ionization (APCI), triple quadrupole mass spectrometry (MS/MS), high resolution mass spectrometry (GC/HRMS), human serum
National Category
Chemical Sciences
Research subject
Analytical Chemistry; Environmental Chemistry; Enviromental Science
Identifiers
urn:nbn:se:oru:diva-50854 (URN)10.1016/j.chroma.2016.05.030 (DOI)000378182800010 ()27236485 (PubMedID)2-s2.0-84969722268 (Scopus ID)
Note

Funding Agency:

China Scholarship Council (CSC) under the Grant CSC 201206400003

Available from: 2016-06-15 Created: 2016-06-14 Last updated: 2018-09-12Bibliographically approved
Wang, T., Yu, J., Wang, P. & Zhang, Q. (2016). Levels and distribution of polybrominated diphenyl ethers in the aquatic and terrestrial environment around a wastewater treatment plant. Environmental science and pollution research international, 23(16), 16440-16447
Open this publication in new window or tab >>Levels and distribution of polybrominated diphenyl ethers in the aquatic and terrestrial environment around a wastewater treatment plant
2016 (English)In: Environmental science and pollution research international, ISSN 0944-1344, E-ISSN 1614-7499, Vol. 23, no 16, p. 16440-16447Article in journal (Refereed) Published
Abstract [en]

The distribution and fate of polybrominated diphenyl ethers (PBDEs) in a riparian ecosystem nearby a wastewater treatment plant effluent were investigated. Different aqueous and terrestrial samples such as soil, sediment, plants, and invertebrates were collected and analyzed for tri- to heptabrominated PBDEs. Furthermore, the food web structure was elucidated using stable carbon and nitrogen isotopes. The highest PBDE levels were found for sediment- and soil-dwelling invertebrates, such as earthworms (Σ13 PBDEs 144 ng/g lipid weight), Tubifex tubifex (77 ng/g lw), and scarab larvae (49 ng/g lw). Differences in congener composition profiles among the different matrices show that the environmental distribution and fate of PBDEs in ecosystems can be very complex. Among the analyzed PBDEs in this ecosystem, the tetra-brominated BDE-47 was the dominant PBDE congener and followed by the penta-brominated BDE-99. A potential trend of increasing BDE-47/99 ratio with the increase of δ(15)N was observed for species with similar energy sources (δ(13)C), indicating a higher bioaccumulation potential for BDE-47 in this ecosystem. A significant correlation was also found between PBDEs and polychlorinated biphenyls (PCBs), indicating similar sources and fate between the two compound groups in this area. The biota-soil or biota-sediment accumulation factors (BSAFs) were somewhat different among the PBDE congeners and species, but were generally highest for those with log Kow values around 6.5-7.

Place, publisher, year, edition, pages
Heidelberg, Germany: Springer, 2016
Keywords
Polybrominated diphenyl ethers, PBDEs, Riparian, Bioaccumulation, Sediment, Soil, Biota, Plant
National Category
Environmental Sciences related to Agriculture and Land-use
Research subject
Enviromental Science
Identifiers
urn:nbn:se:oru:diva-50316 (URN)10.1007/s11356-016-6828-5 (DOI)000381156600060 ()27164882 (PubMedID)2-s2.0-84966526814 (Scopus ID)
Note

Funding Agencies:

National Science Foundation of China 21477156

Strategic Priority Research Program of the Chinese Academy of Sciences XDB14010400

Available from: 2016-05-27 Created: 2016-05-16 Last updated: 2018-01-10Bibliographically approved
Wang, T., Vestergren, R., Herzke, D., Yu, J. & Cousins, I. T. (2016). Levels, Isomer Profiles, and Estimated Riverine Mass Discharges of Perfluoroalkyl Acids and Fluorinated Alternatives at the Mouths of Chinese Rivers. Environmental Science and Technology, 50(21), 11584-11592
Open this publication in new window or tab >>Levels, Isomer Profiles, and Estimated Riverine Mass Discharges of Perfluoroalkyl Acids and Fluorinated Alternatives at the Mouths of Chinese Rivers
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2016 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 50, no 21, p. 11584-11592Article in journal (Refereed) Published
Abstract [en]

An extensive sampling campaign was undertaken to study the levels, isomer profiles and riverine mass discharges of perfluoroalkyl acids (PFAAs) and fluorinated alternatives in 19 Chinese rivers. The levels and homologue profiles of Σ10PFAAs varied considerably among the 19 rivers (mean 106; median 16.3, range 8.9-1240 ng/L), indicating the influence of specific point sources. Highly branched isomer profiles of perfluorooctanoic acid (18-25% br-PFOA) in rivers with elevated concentrations (96-352 ng/L) indicate that releases during production of PFOA by electrochemical fluorination and/or its use in fluoropolymer manufacture were the dominant sources to these rivers. The fluorinated alternatives 6:2 fluorotelomer sulfonate (detection frequency 21%, < 0.1-3.1 ng/L) and chlorinated polyfluoroalkyl ether sulfonate F-53B (51%, < 0.56-78.5 ng/L) were also found in some rivers. The total Chinese riverine mass discharges of PFOA (mean 80.9; range 16.8-168 t/y) (including monitoring data from this and other studies) were in good agreement with theoretical PFOA emission estimates (17.3-203 t/y) whereas riverine mass discharges of PFOS (mean 3.6; range 1.9-5.6 t/y) could only account for a minor fraction of theoretically estimated PFOS releases (70 t/y). This study provides empirical evidence that emissions from Chinese point sources likely dominate the global emissions of several legacy PFASs (notably PFOA) and fluorinated alternatives (e.g., F-53B).

Place, publisher, year, edition, pages
Washington: American Chemical Society (ACS), 2016
National Category
Environmental Sciences
Research subject
Enviromental Science
Identifiers
urn:nbn:se:oru:diva-53046 (URN)10.1021/acs.est.6b03752 (DOI)000386991100018 ()27689437 (PubMedID)2-s2.0-84994338522 (Scopus ID)
Note

Funding Agencies:

National Natural Science Foundation 21361140359

Chinese Academy of Sciences GJHZ1202

Norwegian Research Council

Available from: 2016-10-19 Created: 2016-10-19 Last updated: 2018-07-17Bibliographically approved
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