Organophosphate esters(OPEs)have become one group of chemicals with emerging concern in the marine environment.In this work,we investigated OPEs in the air and seawater of the South China Sea in summer 2019.The concen...Organophosphate esters(OPEs)have become one group of chemicals with emerging concern in the marine environment.In this work,we investigated OPEs in the air and seawater of the South China Sea in summer 2019.The concentrations of∑_(10)OPEs in the atmosphere ranged from 66 to 550 pg/m^(3),with TCIPP,TNBP,TPhP,and TEP predominating in the air.The total dissolved OPE concentrations(∑_(10)OPEs without TEP)measured in high-volume water samples ranged from 300 to 3600 pg/L,with a mean concentration of 1180±910 pg/L.TEP was measured with liquid−liquid extraction(LLE),and it showed the highest concentration(average 2000±1450 pg/L)among the selected OPEs.Total suspended matter associated OPEs accounted for less than 4.7%of the sum of OPE concentrations in seawater.Fugacity fractions and air−sea exchange fluxes showed that TCEP,TCIPP,TIBP,TEHP,TPhP,and EHDPP were favored to volatilize,TEP dominated the deposition,while TPrP and TNBP varied between volatilization and deposition.Atmospheric particle deposition fluxes ranged from 5 to 71 ng/m^(2)/day with an average of 17±15 ng/m^(2)/day.The input of∑OPEs to the entire South China Sea via atmospheric particle deposition was estimated to be 22±19 tons/year,while the net air−sea exchange fluxes of OPEs were volatilization from seawater to air with an average of 44±33 tons/year.This work suggests that air−sea exchange and atmospheric particle deposition are significant processes interfering with the transport of OPEs in the marine environment.展开更多
This study aimed to identify stable indicator contaminants of pharmaceuticals and personal care products(PPCPs)to trace the anthropogenic fingerprint of the Pearl River plume in the coastal waters of the northern Sout...This study aimed to identify stable indicator contaminants of pharmaceuticals and personal care products(PPCPs)to trace the anthropogenic fingerprint of the Pearl River plume in the coastal waters of the northern South China Sea.40 PPCPs were under investigation,of which 14 were detected along the Pearl River Estuary and 4 on the shelf of the northern South China Sea.Results show that caffeine,metoprolol,diclofenac,and carbamazepine can be utilized to detect the human impact.They are diluted along the Pearl River,as their concentrations decrease from low salinity towards high salinity.Sulfonamide antibiotics and trimethoprim are suitable to determine the veterinary and human impact.Their highest concentrations were detected along the river yet still in low saline water whereas,the origin of the organic UV-filter is diverse.Their source could not be precisely determined.Only caffeine,metoprolol,octocrylene,and PBSA were detected at the near-coastal stations in the South China Sea.They can be utilized as suitable indicators to detect an anthropogenic impact on the northern South China Sea.The detected concentrations are of low risk to organisms in the Pearl River and the northern South China Sea.展开更多
基金supported by the Federal Ministry of Education and Research of Germany(03F0786C and 03G0269)the Hainan Provincial Natural Science Foundation of China(No.422CXTD533)+1 种基金L.M.gratefully acknowledges the China Scholarship Council for financial support.Funding for the cruise was received by J.J.W.(03G0269)the Federal Ministry of Education and Research of Germany.
文摘Organophosphate esters(OPEs)have become one group of chemicals with emerging concern in the marine environment.In this work,we investigated OPEs in the air and seawater of the South China Sea in summer 2019.The concentrations of∑_(10)OPEs in the atmosphere ranged from 66 to 550 pg/m^(3),with TCIPP,TNBP,TPhP,and TEP predominating in the air.The total dissolved OPE concentrations(∑_(10)OPEs without TEP)measured in high-volume water samples ranged from 300 to 3600 pg/L,with a mean concentration of 1180±910 pg/L.TEP was measured with liquid−liquid extraction(LLE),and it showed the highest concentration(average 2000±1450 pg/L)among the selected OPEs.Total suspended matter associated OPEs accounted for less than 4.7%of the sum of OPE concentrations in seawater.Fugacity fractions and air−sea exchange fluxes showed that TCEP,TCIPP,TIBP,TEHP,TPhP,and EHDPP were favored to volatilize,TEP dominated the deposition,while TPrP and TNBP varied between volatilization and deposition.Atmospheric particle deposition fluxes ranged from 5 to 71 ng/m^(2)/day with an average of 17±15 ng/m^(2)/day.The input of∑OPEs to the entire South China Sea via atmospheric particle deposition was estimated to be 22±19 tons/year,while the net air−sea exchange fluxes of OPEs were volatilization from seawater to air with an average of 44±33 tons/year.This work suggests that air−sea exchange and atmospheric particle deposition are significant processes interfering with the transport of OPEs in the marine environment.
基金The research is part of the Sino-German MEGAPOL project,which is financed by State Ocean Administration(SOA)in China and the Federal Ministry of Education and Research(BMBF,03F0786A)in Germany.
文摘This study aimed to identify stable indicator contaminants of pharmaceuticals and personal care products(PPCPs)to trace the anthropogenic fingerprint of the Pearl River plume in the coastal waters of the northern South China Sea.40 PPCPs were under investigation,of which 14 were detected along the Pearl River Estuary and 4 on the shelf of the northern South China Sea.Results show that caffeine,metoprolol,diclofenac,and carbamazepine can be utilized to detect the human impact.They are diluted along the Pearl River,as their concentrations decrease from low salinity towards high salinity.Sulfonamide antibiotics and trimethoprim are suitable to determine the veterinary and human impact.Their highest concentrations were detected along the river yet still in low saline water whereas,the origin of the organic UV-filter is diverse.Their source could not be precisely determined.Only caffeine,metoprolol,octocrylene,and PBSA were detected at the near-coastal stations in the South China Sea.They can be utilized as suitable indicators to detect an anthropogenic impact on the northern South China Sea.The detected concentrations are of low risk to organisms in the Pearl River and the northern South China Sea.
