CONTRIBUTION OF WASTEWATER DISCHARGE FROM SEWAGE TREATMENT PLANTS TO ANTIBIOTIC POLLUTION IN COASTAL WATER:A CASE STUDY OF HANGZHOU BAY
The research was focused on Hangzhou Bay(HB)in the East China Sea,a region characterized by severe water pollution.The composition and distribution of 77 antibiotics belonging to 6 classes,in sewage treatment plants,near-shore effluent receiving areas,and coastal waters were investigated using high-performance liquid chromatography-mass spectrometry.The findings revealed that the removal rates of antibiotics in sewage treatment plants ranged from 31.1％to 88.8％,with quinolones exhibiting the highest removal rate at an average value of 80.3％.Effluent from the sewage treatment plants was discharged into the corresponding effluent receiving areas.In the Jiaxing(JX)effluent receiving area,53 antibiotics were identified with an average concentration of 48180.7 ng/L,while the Shangyu(SY)effluent receiving area contained 63 antibiotics with an average concentration of 341.2 ng/L.The result of the principal component analysis indicated that the sewage treatment plant was a significant source of antibiotic pollution in the SY effluent receiving area.In contrast,the antibiotics in the JX effluent receiving area were less influenced by the sewage treatment plant discharge and more affected by other sources containing veterinary antibiotics.Following the collection of antibiotic-containing wastewater,the near-shore effluent receiving areas became a"source"of antibiotic pollution in the coastal sea.The waterin coastal area contained 51 antibiotics with an average concentration of 189.5 ng/L.A clear"distance attenuation"trend was observed in the diffusion of antibiotic concentration from near-shore to coastal areas,particularly for quinolone antibiotics.
antibioticssewage treatment planteffluent receiving areacoastal waterHangzhou Bay
NETL
NSTL
万方数据
