Removal of abamectin and conventional pollutants in vertical flow constructed wetlands with Fe-modified biochar.

ABSTRACT: To improve the ability of constructed wetlands to remove abamectin (ABM) and nutrients, the influence of four different substrates on constructed wetlands was studied. Four vertical up-flow constructed wetlands (UVCWs) were established to treat simulated agricultural wastewater: CW1 (quartz sand + pebbles), CW2 (pebbles + coke), CW3 (Fe-modified biochar + pebbles + coke), and CW4 (unmodified biochar + pebbles + coke). Under different combinations of hydraulic loading and organic loading, CW3 was extremely effective at removing nitrogen compared with CW1, CW2 and CW4. We found that CW3 was the most effective at treating ABM and conventional pollutants. The highest efficiency of removal of abamectin (99%), COD (98%), NH₄ ⁺-N (65%), and TP (80%) was obtained in CW3. Thes

SUBMITTER: Sha NQ 

PROVIDER: S-EPMC9058508 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature