Adsorbent was prepared using coconut fibers. Coconut fibers were air dried and crushed by grinder. The material was sieved through 2 mm copper sieve. 40 g of crushed material was taken in a beaker and mixed with 400 ml of 1 N nitric acid. The content was heated on hot plate maintaining a temperature of 70–80 C for 20 min, cooled and washed with distilled water till the dirty color was removed. Washed material was mixed with 400 ml of 1 N sodium hydroxide, again heated at 70–80 C for 20 min and washed thoroughly. This material was air dried, grinded, sieved through 600 mm sieve and stored [17]. The surface area of the adsorbent was measured using Horiba SA- 9600 series (Japan) BET surface area analyzer by Nitrogen gas adsorption. The surface morphology of the adsorbent before and after adsorption was observed by scanning electron microscopy (SEM).