Analysing wastewater samples is an innovative approach that overcomes many limitations of traditional surveys to identify and measure a range of chemicals that were consumed by or exposed to people living in a sewer c...Analysing wastewater samples is an innovative approach that overcomes many limitations of traditional surveys to identify and measure a range of chemicals that were consumed by or exposed to people living in a sewer catchment area. First conceptualised in 2001, much progress has been made to make wastewater analysis（WWA） a reliable and robust tool for measuring chemical consumption and/or exposure. At the moment, the most popular application of WWA, sometimes referred as sewage epidemiology, is to monitor the consumption of illicit drugs in communities around the globe, including China. The approach has been largely adopted by law enforcement agencies as a device to monitor the temporal and geographical patterns of drug consumption. In the future, the methodology can be extended to other chemicals including biomarkers of population health（e.g. environmental or oxidative stress biomarkers, lifestyle indicators or medications that are taken by different demographic groups） and pollutants that people are exposed to（e.g. polycyclic aromatic hydrocarbons,perfluorinated chemicals, and toxic pesticides）. The extension of WWA to a huge range of chemicals may give rise to a field called sewage chemical-information mining（SCIM） with unexplored potentials. China has many densely populated cities with thousands of sewage treatment plants which are favourable for applying WWA/SCIM in order to help relevant authorities gather information about illicit drug consumption and population health status. However, there are some prerequisites and uncertainties of the methodology that should be addressed for SCIM to reach its full potential in China.展开更多
The Furniture and Furnishings(Fire Safety)Regulations 1988 is the major driver for the use of chemical flame retardants(FRs)in soft furnishings marketed in the UK.While these regulations specify the level of flame ret...The Furniture and Furnishings(Fire Safety)Regulations 1988 is the major driver for the use of chemical flame retardants(FRs)in soft furnishings marketed in the UK.While these regulations specify the level of flame retardancy required,they do not specify how such levels should be achieved.Consequently,it remains unclear which FRs are present in UK soft furnishings.This is important not only to help assess what FRs we may be exposed to currently,but which FRs are currently entering the waste stream with concomitant potential for release into the environment.To address this data gap,concentrations of polybrominated diphenyl ethers(PBDEs),hexabromocyclododecane(HBCDD)and a range of chlorinated organophosphate flame retardants(OPFRs)were measured in samples of domestic and office waste soft furnishings products entering the UK waste stream in 2011 and 2012.This preliminary study measured the FR content of:carpets(n?4),curtains(n?7),mattress fabrics(n?2),furniture foam(n?9),and furniture upholstery textiles(n?10).Polybrominated diphenyl ethers(PBDEs)and hexabromocyclododecane(HBCDD)were not found at significant concentrations(below detection limits in most samples)in any of the twenty two analysed products.In contrast,7 of the 9 furniture foam samples were treated with tris(2-chloroisopropyl)phosphate(TCIPP)at a mean concentration of 1.9%w/w,with another single foam sample containing tris(1,3-dichloroisopropyl)phosphate(TDCIPP)and tris(2-chloroethyl)phosphate(TCEP)at 1.1 and 0.5%respectively.By comparison,PBDE concentrations are within the range reported previously for UK indoor dust[18],rather than the percent by weight levels required to impart flame retardancy.展开更多
Hexabromocyclododecane(HBCDD)is listed under the Stockholm Convention on persistent organic pollutants,yet very few data are available on HBCDD concentrations in soil.Median concentrations of total hexabromocyclododec...Hexabromocyclododecane(HBCDD)is listed under the Stockholm Convention on persistent organic pollutants,yet very few data are available on HBCDD concentrations in soil.Median concentrations of total hexabromocyclododecanes(SHBCDDs)from soils from the UK(n=24)were 0.73 ng g^-1 dry weight(range<0.01-430 ng g^-1)and exceed significantly(p=0.002)those in Australian soils(n=17,median=0.10 ng g^-1,range<0.0002-5.6 ng g^-1).Concentrations of polychlorinated biphenyls(PCBs)(average=4.7 ng SPCBs g^-1,range=0.39-21 ng g^-1)were determined in 19 UK samples and found to be statistically indistinguishable(p>0.05)from those of HBCDDs;thereby underlining the extent to which HBCDDs have migrated into the UK environment.Moreover,PCB concentrations in this study are not markedly lower than those recorded in UK soils sampled in the mid-1980s indicating that the initial rapid decline in UK contamination with PCBs following bans on their manufacture and use,has not been maintained.Degradation products of HBCDD:pentabromocyclododecenes(PBCDs)and tetrabromocyclododecadienes(TBCDs)were detected in some UK soil samples with semi-quantitative concentrations ranging between 0.01 and 7.3 ng g^-1 for SPBCDs and 0.01e1.3 ng g^-1 for STBCDs.In Australian soils only STBCDs were detected at concentrations ranging from 0.0023 to 0.45 ng g^-1.Chiral signatures of HBCDDs were racemic or non-racemic in all samples indicating minimal edaphic enantioselective degradation.A horizontal transect at the most contaminated UK location(a suburban garden)revealed a marked decrease in concentrations of HBCDDs with increasing distance from buildings.展开更多
基金funded through the UQ Postdoctoral Research Fellowshipfunded through the Australian Research Council Future Fellowship (No. FT120100546)
文摘Analysing wastewater samples is an innovative approach that overcomes many limitations of traditional surveys to identify and measure a range of chemicals that were consumed by or exposed to people living in a sewer catchment area. First conceptualised in 2001, much progress has been made to make wastewater analysis（WWA） a reliable and robust tool for measuring chemical consumption and/or exposure. At the moment, the most popular application of WWA, sometimes referred as sewage epidemiology, is to monitor the consumption of illicit drugs in communities around the globe, including China. The approach has been largely adopted by law enforcement agencies as a device to monitor the temporal and geographical patterns of drug consumption. In the future, the methodology can be extended to other chemicals including biomarkers of population health（e.g. environmental or oxidative stress biomarkers, lifestyle indicators or medications that are taken by different demographic groups） and pollutants that people are exposed to（e.g. polycyclic aromatic hydrocarbons,perfluorinated chemicals, and toxic pesticides）. The extension of WWA to a huge range of chemicals may give rise to a field called sewage chemical-information mining（SCIM） with unexplored potentials. China has many densely populated cities with thousands of sewage treatment plants which are favourable for applying WWA/SCIM in order to help relevant authorities gather information about illicit drug consumption and population health status. However, there are some prerequisites and uncertainties of the methodology that should be addressed for SCIM to reach its full potential in China.
基金The authors acknowledge gratefully the provision of an Open Competition CASE studentship award to WAS by the UK Natural Environment Research Council(NERC ref.NE/I018352/1).Additional financial support to WAS from Ricardo-AEA is also acknowledged gratefully.The research leading to these results has received funding from DEFRA.
文摘The Furniture and Furnishings(Fire Safety)Regulations 1988 is the major driver for the use of chemical flame retardants(FRs)in soft furnishings marketed in the UK.While these regulations specify the level of flame retardancy required,they do not specify how such levels should be achieved.Consequently,it remains unclear which FRs are present in UK soft furnishings.This is important not only to help assess what FRs we may be exposed to currently,but which FRs are currently entering the waste stream with concomitant potential for release into the environment.To address this data gap,concentrations of polybrominated diphenyl ethers(PBDEs),hexabromocyclododecane(HBCDD)and a range of chlorinated organophosphate flame retardants(OPFRs)were measured in samples of domestic and office waste soft furnishings products entering the UK waste stream in 2011 and 2012.This preliminary study measured the FR content of:carpets(n?4),curtains(n?7),mattress fabrics(n?2),furniture foam(n?9),and furniture upholstery textiles(n?10).Polybrominated diphenyl ethers(PBDEs)and hexabromocyclododecane(HBCDD)were not found at significant concentrations(below detection limits in most samples)in any of the twenty two analysed products.In contrast,7 of the 9 furniture foam samples were treated with tris(2-chloroisopropyl)phosphate(TCIPP)at a mean concentration of 1.9%w/w,with another single foam sample containing tris(1,3-dichloroisopropyl)phosphate(TDCIPP)and tris(2-chloroethyl)phosphate(TCEP)at 1.1 and 0.5%respectively.By comparison,PBDE concentrations are within the range reported previously for UK indoor dust[18],rather than the percent by weight levels required to impart flame retardancy.
基金the provision of studentships to JD(NE/F006470/1)and TE(NER/S/A/2003/11193)by the UK Natural Environment Research Councilfor additional financial support from the UK Food Standards Agency to JD and from Tata Steel for TE.
文摘Hexabromocyclododecane(HBCDD)is listed under the Stockholm Convention on persistent organic pollutants,yet very few data are available on HBCDD concentrations in soil.Median concentrations of total hexabromocyclododecanes(SHBCDDs)from soils from the UK(n=24)were 0.73 ng g^-1 dry weight(range<0.01-430 ng g^-1)and exceed significantly(p=0.002)those in Australian soils(n=17,median=0.10 ng g^-1,range<0.0002-5.6 ng g^-1).Concentrations of polychlorinated biphenyls(PCBs)(average=4.7 ng SPCBs g^-1,range=0.39-21 ng g^-1)were determined in 19 UK samples and found to be statistically indistinguishable(p>0.05)from those of HBCDDs;thereby underlining the extent to which HBCDDs have migrated into the UK environment.Moreover,PCB concentrations in this study are not markedly lower than those recorded in UK soils sampled in the mid-1980s indicating that the initial rapid decline in UK contamination with PCBs following bans on their manufacture and use,has not been maintained.Degradation products of HBCDD:pentabromocyclododecenes(PBCDs)and tetrabromocyclododecadienes(TBCDs)were detected in some UK soil samples with semi-quantitative concentrations ranging between 0.01 and 7.3 ng g^-1 for SPBCDs and 0.01e1.3 ng g^-1 for STBCDs.In Australian soils only STBCDs were detected at concentrations ranging from 0.0023 to 0.45 ng g^-1.Chiral signatures of HBCDDs were racemic or non-racemic in all samples indicating minimal edaphic enantioselective degradation.A horizontal transect at the most contaminated UK location(a suburban garden)revealed a marked decrease in concentrations of HBCDDs with increasing distance from buildings.
