|
| Purification effect of azolla on domestic sewage containing carbamazepine and gemfibrozil |
| Received:October 18, 2022 |
| View Full Text View/Add Comment Download reader |
| KeyWord:emerging pollutant;carbamazepine;gemfibrozil;azolla;water purification |
| Author Name | Affiliation | E-mail | | LI Shengshu | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China | | | CUI Erping | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China | | | ZHENG Lingyun | Luohe Agricultural and Water Technology Promotion Center, Luohe 462000, China | | | LI Songjing | School of Earth System Science, Tianjin University, Tianjin 300072, China | | | TAO Zhen | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China | | | HU Chao | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China | | | ZHAO Zhijuan | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China | | | FAN Xiangyang | Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China | fxy0504@163.com |
|
| Hits: 2379 |
| Download times: 2222 |
| Abstract: |
| Environmental hazards and remediation of pharmaceuticals and personal care products（PPCPs）have recently received growing attentions. Thus, investigating the purification effect of azolla on domestic sewage containing PPCPs is important. Representative PPCPs gemfibrozil, carbamazepine, and azolla were used as test materials, and indoor simulation culture tests were conducted to investigate the growth of azolla in domestic wastewater at both different incubation times（1, 2, 4, and 8 d）and different initial concentrations of PPCPs（0, 1, 10, 100, and 1 000 μg·L-1）, as well as the removal rates of conventional pollutants（ammonia nitrogen, NH3-N; nitrate nitrogen, NO-3-N; total phosphorus, TP; chemical oxygen demand, COD）and PPCPs. With an increase of the initial concentration of PPCPs in domestic wastewater, the relative growth rate and tolerance index of azolla showed a trend of first increasing and then decreasing, and the growth of azolla was inhibited under the treatment of 100 and 1 000 μg · L-1 PPCPs. Compared with the control, the removal effect of azolla on nitrogen and phosphorus was significantly enhanced under 1 and 10 μg·L-1 PPCPs treatment（P<0.05）, but was significantly weakened under 100 and 1 000 μg·L-1 PPCPs treatment（P<0.05）. When treating with different initial concentrations of PPCPs, the effect of azolla on COD removal was significant, and the COD removal rate increased with the increase of the initial concentration of PPCPs. The removal effect of azolla on gemfibrozil and carbamazepine was enhanced with increasing incubation time. The removal rate of gemfibrozil increased with increasing initial concentration of PPCPs（except for 1 000 μg·L-1 PPCPs treatment）, whereas the removal rate of carbamazepine decreased with increasing initial concentration of PPCPs. Azolla has a good removal effect on both PPCPs and conventional pollutants other than ammonia nitrogen in domestic wastewater and can be used as a remediation treatment plan for domestic wastewater containing typical PPCPs. |
|
|
|
