Wildfire episodes have become more frequent and severe in recent years.1 Record-breaking fires devastated the Arctic,Amazon,and Australia in 2019–2020.This year,fires began in Canada in May and lasted for several mon...Wildfire episodes have become more frequent and severe in recent years.1 Record-breaking fires devastated the Arctic,Amazon,and Australia in 2019–2020.This year,fires began in Canada in May and lasted for several months,resulting in an area burned of 16.5 million hectares by early September.This size is 6–7 times the annual fire area for a normal year in Canada.The favorable fire weather for burning and spread lasted for months(https://cwfis.cfs.nrcan.gc.ca/maps/fw).Furthermore,most Canadian fires occur in remote regions far from firefighting facilities,causing fire extinction to be difficult.Unfortunately,such“unprecedented”fire events occurred routinely in boreal regions between 2020 and 2023,although the locations varied from year to year(Figure 1).展开更多
Per-and polyfluoroalkyl substances(PFASs)constitute a broad group of fluorinated organic chemicals that are widely used in consumer products and industrial applications due to their excellent physicochemical propertie...Per-and polyfluoroalkyl substances(PFASs)constitute a broad group of fluorinated organic chemicals that are widely used in consumer products and industrial applications due to their excellent physicochemical properties.Given that people spend a significant portion of their time in office environments,our understanding of the environmental presence and human exposure to these chemicals is crucial.In this study,we conducted a targeted analysis of 24 PFASs in office indoor environments.The SPFAS concentrations ranged from 51.6 to 219 ng/g with mean(±SE)and median concentrations of 114(±5.75)and 107 ng/g,respectively.Hexafluoropropylene oxide dimer acid(HFPO-DA)was the most abundant emerging PFAS detected in the dust,with mean and median concentrations of 40.5(±1.62)and 40.4 ng/g,respectively,comprising 34.2%of the SPFAS concentrations.Notably,HFPO-DA exhibited a positive correlation with perfluorooctane sulfonate(PFOS)(r:0.427,p<0.01),suggesting a potential common source for these two compounds.Our findings underscore the significant contribution of emerging PFASs to total PFAS concentrations and raise concerns about their chronic toxicity and potential health risks to humans in office indoor environments.展开更多
基金jointly supported by the National Key Research and Development Program of China [grant number 2023YFF0805402]the Natural Science Foundation of Jiangsu Province [grant number BK20220031]。
基金National Key Research and Development Program of China(no.2023YFF0805402).
文摘Wildfire episodes have become more frequent and severe in recent years.1 Record-breaking fires devastated the Arctic,Amazon,and Australia in 2019–2020.This year,fires began in Canada in May and lasted for several months,resulting in an area burned of 16.5 million hectares by early September.This size is 6–7 times the annual fire area for a normal year in Canada.The favorable fire weather for burning and spread lasted for months(https://cwfis.cfs.nrcan.gc.ca/maps/fw).Furthermore,most Canadian fires occur in remote regions far from firefighting facilities,causing fire extinction to be difficult.Unfortunately,such“unprecedented”fire events occurred routinely in boreal regions between 2020 and 2023,although the locations varied from year to year(Figure 1).
基金supported by the China Postdoctoral Science Foundation(2022M722213)GuangDong Basic and Applied Basic Research Foundation(2023A1515110415).
文摘Per-and polyfluoroalkyl substances(PFASs)constitute a broad group of fluorinated organic chemicals that are widely used in consumer products and industrial applications due to their excellent physicochemical properties.Given that people spend a significant portion of their time in office environments,our understanding of the environmental presence and human exposure to these chemicals is crucial.In this study,we conducted a targeted analysis of 24 PFASs in office indoor environments.The SPFAS concentrations ranged from 51.6 to 219 ng/g with mean(±SE)and median concentrations of 114(±5.75)and 107 ng/g,respectively.Hexafluoropropylene oxide dimer acid(HFPO-DA)was the most abundant emerging PFAS detected in the dust,with mean and median concentrations of 40.5(±1.62)and 40.4 ng/g,respectively,comprising 34.2%of the SPFAS concentrations.Notably,HFPO-DA exhibited a positive correlation with perfluorooctane sulfonate(PFOS)(r:0.427,p<0.01),suggesting a potential common source for these two compounds.Our findings underscore the significant contribution of emerging PFASs to total PFAS concentrations and raise concerns about their chronic toxicity and potential health risks to humans in office indoor environments.
