Textile industry wastewater poses a significant threat to aquatic ecosystems and human health due to its toxic, mutagenic, and carcinogenic properties. The use of biochar derived from areca nut husks as an adsorbent shows potential in removing contamination of cationic dye Malachite Green and anionic dye Reactive Blue. Biochar is produced through pyrolysis at a temperature of 500°C for 2 hours…