Coconut shell carbon via phosphoric acid activation for rhodamine B, malachite green, and methylene blue adsorption - equilibrium and kinetics.

This study was aimed at evaluating the removal of different cationic dyes onto phosphoric acid-activated coconut shell carbon. The activated carbon was characterized for surface functional groups, thermal decomposition profiles, surface morphology, and textural properties. The specific area was recorded as 1,221 m/g with 100% mesoporosity.