Microwave Activated Carbonized Coconut Shell (MACCS) was used to recover urea from human urine.
Batch adsorption studies were conducted to evaluate the effect of initial adsorbate concentration (25%–
100%), contact time, carbon loading (1–3 g) and shaking speed (150–200 rpm) on the removal of urea at
30 8C. Microwave activation was performed at 180 W (microwave output power) for 10 min.