Adsorption of brilliant cresyl blue using NaOH-activated biochar derived from sewage sludgeMajda Ben Ali, Yassmina Bakhtaoui, Majda Flayou, Mouatamid El Hazzat, Aicha Sifou, Mohammed Dahhou, Mohammed Kacimi, Abdellah Benzaouak and Adnane El HamidiE3S Web Conf., 601 (2025) 00087DOI: https://doi.org/10.1051/e3sconf/202560100087