Recent studies suggest per-and polyfluoroalkyl substances(PFAS)are ubiquitous in rivers worldwide.In the Asia-Pacific region,the frequency of PFAS detection in rivers is increasing.However,the overwhelming majority of...Recent studies suggest per-and polyfluoroalkyl substances(PFAS)are ubiquitous in rivers worldwide.In the Asia-Pacific region,the frequency of PFAS detection in rivers is increasing.However,the overwhelming majority of studies and data represent high population and urbanized river catchments.In this study,we investigate PFAS occurrence in major Philippines river systems characterized by both high and low population densities.In the Pasig Laguna de Bay River,which drains a major urban conurbation,we detected PFAS at concentrations typical of global rivers.Unexpectedly,we did not detect PFAS in river water or sediments in low population density river catchments,despite our instrument detection limits being lower than the vast majority of river concentrations reported worldwide.We hypothesize that septic tanks,as the dominant wastewater treatment practice in Philippines catchments,may control the release of PFAS into groundwater and rivers in the Philippines.However,no groundwater PFAS data currently exist to validate this supposition.More broadly,our findings highlight the need for more representative PFAS sampling and analysis in rivers to more accurately represent regional and global detection frequencies and trends.展开更多
In recent years,outdoor apparel that combines functionality with fashion has become a focal point in the market.As research on fluorinated compounds deepens,calls for eliminating PFAS(per-and poly fluorinated alkyl su...In recent years,outdoor apparel that combines functionality with fashion has become a focal point in the market.As research on fluorinated compounds deepens,calls for eliminating PFAS(per-and poly fluorinated alkyl substances)are growing louder.Traditional outdoor equipment such as waterproof jackets and hiking boots have long relied on PFAS for water and oil resistance,yet this comes at the potential cost of threatening ecosystems and consumer health.An innovationdriven sustainable transformation is now emerging—a growing number of pioneering brands are developing eco-friendly,PFAS-free alternatives,redefining the standards of high performance.展开更多
PFASs(per-and polyfluoroalkyl substances)are a group of more than 12,000 man-made chemicals used in industrial,commercial,and consumer products since the 1940s.Their unique chemical structure resists degradation and t...PFASs(per-and polyfluoroalkyl substances)are a group of more than 12,000 man-made chemicals used in industrial,commercial,and consumer products since the 1940s.Their unique chemical structure resists degradation and they are often referred to as“forever chemicals”because of how long they persist in the environment.PFASs are also known to accumulate in human tissue.Exposure to certain PFAS at very low concentrations can cause kidney and testicular cancer,hormone disruption,and liver and thyroid diseases.Based on our experience managing PFAS impacted soil and groundwater at geotechnical construction vertical(structures)and horizontal(infrastructure and roads)projects,we present case studies to describe the current federal and state regulatory landscape for this group of emerging contaminants.This paper will provide a summary of basic sampling,testing,and risk-assessment approaches as well as solutions for cost effective treatment and acceptable disposal options.展开更多
基金Natural Environment Research Council,Grant/Award Number:NE/W006871/1。
文摘Recent studies suggest per-and polyfluoroalkyl substances(PFAS)are ubiquitous in rivers worldwide.In the Asia-Pacific region,the frequency of PFAS detection in rivers is increasing.However,the overwhelming majority of studies and data represent high population and urbanized river catchments.In this study,we investigate PFAS occurrence in major Philippines river systems characterized by both high and low population densities.In the Pasig Laguna de Bay River,which drains a major urban conurbation,we detected PFAS at concentrations typical of global rivers.Unexpectedly,we did not detect PFAS in river water or sediments in low population density river catchments,despite our instrument detection limits being lower than the vast majority of river concentrations reported worldwide.We hypothesize that septic tanks,as the dominant wastewater treatment practice in Philippines catchments,may control the release of PFAS into groundwater and rivers in the Philippines.However,no groundwater PFAS data currently exist to validate this supposition.More broadly,our findings highlight the need for more representative PFAS sampling and analysis in rivers to more accurately represent regional and global detection frequencies and trends.
文摘In recent years,outdoor apparel that combines functionality with fashion has become a focal point in the market.As research on fluorinated compounds deepens,calls for eliminating PFAS(per-and poly fluorinated alkyl substances)are growing louder.Traditional outdoor equipment such as waterproof jackets and hiking boots have long relied on PFAS for water and oil resistance,yet this comes at the potential cost of threatening ecosystems and consumer health.An innovationdriven sustainable transformation is now emerging—a growing number of pioneering brands are developing eco-friendly,PFAS-free alternatives,redefining the standards of high performance.
文摘PFASs(per-and polyfluoroalkyl substances)are a group of more than 12,000 man-made chemicals used in industrial,commercial,and consumer products since the 1940s.Their unique chemical structure resists degradation and they are often referred to as“forever chemicals”because of how long they persist in the environment.PFASs are also known to accumulate in human tissue.Exposure to certain PFAS at very low concentrations can cause kidney and testicular cancer,hormone disruption,and liver and thyroid diseases.Based on our experience managing PFAS impacted soil and groundwater at geotechnical construction vertical(structures)and horizontal(infrastructure and roads)projects,we present case studies to describe the current federal and state regulatory landscape for this group of emerging contaminants.This paper will provide a summary of basic sampling,testing,and risk-assessment approaches as well as solutions for cost effective treatment and acceptable disposal options.
