Efficient adsorption of Crystal Violet Dye using Coir Pith-Derived Biochar: CCD-RSM modelling and CharacterizationJeevan Mathew Tharayil, Prakash Chinnayan, Nandyala Venkat Nivas, Suresh Babu V and Krishna Murthy CE3S Web Conf., 455 (2023) 03002DOI: https://doi.org/10.1051/e3sconf/202345503002