The influence mechanism of multiple antibiotics on the purification efficiency of vertical flow constructed wetlands
Aiming at the water environment safety problems caused by antibiotics,improving the water quality safety guarantee function of constructed wetland,the effect of antibiotics on the purification capacity of it was studied.Constructing the up-vertical flow constructed wetland added antibiotics(CW-A)and the control constructed wetland without antibiotics addition(CW),the removal characteristics of multiple antibiotics and their effects on pollutant removal,plant growth characteristics and microbial community composition of constructed wetland were studied.The results showed that the removal rate of ciprofloxacin(CIP)was 96.03％,significant higher than that of sulfamethoxazole(SMX)(76.70％).CIP and SMX had no significant effect on COD and TP removal in constructed wetland(89.55％,86.53％and 47.59％,50.39％,P＞0.05).Antibiotics caused damage to plant cells,resulting in a 20.63％reduction in biomass of plants in CW-A compared with plants in CW.High-throughput sequencing results showed that antibiotics could reduce the relative abundance of Chlorobaculum,Zoogloea,Pseudomonas and Acinetobacter in constructed wetland,resulting in a significantly lower TN removal rate in CW-A(34.82％)compared to CW(40.72％,P＜0.05).
constructed wetlandsulfamethoxazoleciprofloxacinplantsmicrobial community
万方数据
维普
