Distribution characteristics and risk assessment of organophosphate ester in sediments from typical Beijiang River basin
This study aimed to investigate the distribution characteristics and ecological risks of organophosphate ester(OPEs)in sediments from typical Beijiang River basin.Utilizing gas chromatography-triple quadrupole tandem mass spectrometry,the residues of 10 OPEs across 21 sampling points in typical Beijiang River basin were detected.The potential sources of OPEs were analyzed and their ecological risks were assessed using the risk entropy method.Results indicated that the total OPEs(∑OPEs)ranged from 1.28 to 51.14 ng/g,with major components identified as tri(2-butoxyethyl)phosphate(TBOEP),tri(2-ethylhexyl)phosphate(TEHP),triphenyl phosphate(TPHP)and tri(2-chloropropyl)phosphate(TCPP).Spearman correlation analysis and principal component analysis suggested that electronic waste dismantling facilities were likely significant sources of tri(2-chloroethyl)phosphate(TCEP),TCPP,TPHP and triisobutyl phosphate(TiBP).Ecological risk assessment revealed that the overall potential ecological risk in the area was low.However,TPHP posed moderate risk in two areas and high risk in one area,while ethylhexyl diphenyl phosphate(EHDPP)presented moderate risk in five areas,with OPEs in other areas being of low risk.These findings provide crucial baseline data for the classification management of water environments in the Pearl River basin in the future.
万方数据
维普
