Study on the Adsorption of Ofloxacin in Water by Canna indica Biochars Jiajia Yuan, Tianhao Liu, Wei Xie, Huizhou Yuan, Wenyi Dong, Hongjie Wang and Yang Yang E3S Web Conf., 628 (2025) 01004 Published online: 16 May 2025 DOI: 10.1051/e3sconf/202562801004