MODELLING AND OPTIMIZATION OF HEXAVALENT CHROMIUM [CR (VI)] REMOVAL FROM AQUEOUS SOLUTION USING MODIFIED AND NON-MODIFIED RICE HUSK: INTEGRATED RESPONSE SURFACE METHODOLOGY AND ARTIFICIAL NEURAL APPROACHES
Hexavalent chromium [Cr(VI)] in industrial wastewater requires treatment methods that are efficient, affordable and adaptable to resource-constrained settings. This study compared nitric-acid-modified and non-modified rice husk in a 29-run response surface design comprising initial chromium concentration (20-100 mg/L),…