Surface Modification of Tea-Waste-Based Biochar Adsorbent: Synthesis, Characterization, and Batch Adsorption for the Removal of Zidovudine ARV Drug and Phenol. - Mashoene, Tumelo Nortica; Leudjo Taka, Anny; Akpotu, Samson O.; Lawal, Isiaka A.; Klink, Michael John (Applied Sciences (2076-3417), 2023)