MODIFYING COIR PITH AT LOW TEMPERATURE AND USING FOR ADSORPTION OF ION Cu'* FROM WATER
Abstract
Coir pith - a low value agriculture byproduct has been used in some manufacturing areas but not valuable. Our thesis's objective is modify coir pith by acid to get an adsorbent for removing cations from contaminated water. These achieved technical conditions are: after washed and dryed material (coir pith) has been activated with concentrated sulphuric acid (98%o) at I50°C in 6 hours, coir pith/acid proportion (1 g : 7,4 g). Then, one part was washedwith distilled water to remove the free acid (RA) and another part soaked in 0,1 N sodium bicarbonate solution in 2 hours to remove any residual acid (RAN). The results of study show that the oxidation of activated carbons increase the amount of surface oxygen complexes and sulfonic group also occurred in structure of activated carbon. The amount of ion Cu adsorbed is about 31 mg/g on RA and 57 mg/g on RAN.