Synthesis of magnetic biochar using Bauhinia variegata leaves through one-pot hydrothermal process to degrade malachite green dye by Fenton-like catalysis - Ramesh Vinayagam; Gokulakrishnan Murugesan; Sujesh Sudarsan; Thivaharan Varadavenkatesan; Raja Selvaraj (PLoS ONE, 2026)