The sorption of cadmium(II) ions on mercerized rice husk and activated carbon

Authors : Mas Rosemal Hakim MAS HARIS, Nor Aimi ABDUL WAHAB, Chong Wan RENG

Pages : 939-950

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :This work describes the removal of Cdinsert ignore into journalissuearticles values(II); ions in aqueous solution by unmodified and base-modified rice husk insert ignore into journalissuearticles values(RH); as compared to that by activated carbon insert ignore into journalissuearticles values(AC);. Mercerization of RH was carried out by using dilute solutions insert ignore into journalissuearticles values(0.013 M); of NaOH, KOH, and Cainsert ignore into journalissuearticles values(OH);2. The experiments were conducted in duplicate under 1-batch and 2-batch treatments. In the 1-batch treatment, a fresh 200 mg of each adsorbent was used to study the sorption of the Cdinsert ignore into journalissuearticles values(II); ions from 100-mL solutions at an initial concentration of 5 mg L-1. The adsorption percentage increased in the order of unmodified RH insert ignore into journalissuearticles values(80.13 \pm 0.46%); < Cainsert ignore into journalissuearticles values(OH);2-modified RH insert ignore into journalissuearticles values(90.74 \pm 0.18%); < NaOH-modified RH insert ignore into journalissuearticles values(93.36 \pm 0.23%); \le KOH-modified RH insert ignore into journalissuearticles values(93.78 \pm 0.27%); < AC insert ignore into journalissuearticles values(98.4 \pm 0.18%);. In the 2-batch treatment, a fresh 100 mg of each adsorbent was placed in 100-mL solutions at an initial concentration of 5 mg L-1 of Cdinsert ignore into journalissuearticles values(II); ions for 30 min, and the resulting solutions were filtered. The filtrates were subjected to another fresh 100 mg of each adsorbent for an additional 30 min. The percentage removal of the metal ion using the 2-batch treatment for unmodified RH, base-modified RH, and AC was 97.71%, 98.00 \pm 1.00%, and nearly 100%, respectively.
Keywords : Cd II, , sorption, mercerization, base modified, rice husk, activated carbon