The Occurrence Pattern Of UV Filters And Illicit Drugs In Korean Water Environment During Summer Holiday Season

In this study,we measured the concentrations of eight UV filters and 24illicit drugs in Korean water environment comprising seawater from three beaches?Gwangalli,Haeundae,and Songjeong?,effluent from three WWTPs,and river water from Songjeong Stream and Suyeong River.Of the eight UV filters investigated,we detected BP,EHS,IAMB,BP-3,4-MBC,BC,and EHMC.UV filter concentrations were greatest in seawater samples(39.4–296 ng L^-1)and lowest in effluent samples(6.84–51.1 ng L^-1).UV filter concentrations differed significantly during the holiday period,and the occurrence pattern of these compounds was affected by human behavior.From the environmental risk assessment results,EHMC had a low potential for adverse effects to aquatic organisms during the holiday period in Gwagalli Beach,Songjeong Stream,and Suyeong River.Of the 24 illicit drugs investigated,we detected AMP,MA,COD,MOR,HCD,cis-TRM,and MEP in most wastewater samples,while FEN was detected in only three samples.The daily load of the illicit drugs was ND–26,835 mg d^-1.The consumption rate of MA(13.8–45.8 mg d^-1?1000people?^-1)was consistent with our previous study in 2012.However,the MA-to-AMP ratio decreased in the peak summer holiday period,possibly due to increased MA use,whereas the consumption rate of COD decreased during this period.Unexpectedly,cis-TRM and MEP,which are prescription drugs,had similar patterns to MA.