Adsorption of Tetracycline by Ammonium Molybdate Modified Chinese Fir Biochars Caimei Lu, Hanbing Zhang, Rui Tang, Sishan Yu and Zehua Li E3S Web Conf., 350 (2022) 03008 Published online: 09 May 2022 DOI: 10.1051/e3sconf/202235003008