Degradation of tetracycline in water by activating peroxymonosulfate with nano zero-valent iron loading on nitrogen-containing biocharHangdao Qin, Hao Cheng, Jiming Huang and Sizhan WuE3S Web Conf., 438 (2023) 01001DOI: https://doi.org/10.1051/e3sconf/202343801001