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| Article Name : | | | ARSENIC ADSORPTION BEHAVIOR OF METAL ACTIVATED CARBON IN COMPARISON OF ACTIVATED CARBON | | Author Name : | | | Ajay Kumar Agrawal | | Publisher : | | | Ashok Yakkaldevi | | Article Series No. : | | | ROR-986 | | Article : | |  | Author Profile | | Abstract : | | | In this work, two adsorbents, namely MAC (metal activated carbon) and AC (Activated carbon), have been synthesized and studied for their adsorption behavior towards arsenic. Results of static adsorption studies carried out in the laboratory have shown greater than 99 percent removal of As+3 (which is about four times more toxic than As+5) and As+5, individually and as a 1:1 mixture, by MAC. Effect of various parameters such as adsorbent dose, contact time and initial concentration (of arsenic species under investigation) on removal of arsenic from water are presented. A dose of 15 g/L for MAC adsorbent has been optimized for effective removal of As+3 (<10 ppb (g/L), WHO drinking water limit) within 4 hours of contact time and with an optimized initial arsenic concentration of 2 ppm (mg/L). Similar studies for removal of As+5 and 1:1 mixture of As+3:As+5 from water have shown that an optimized dose of 10 g/L of MAC in contact with As+5 contaminated water (initial As+5 concentration: 1 ppm) for 6 hours and an optimized dose of 20 g/L of MAC in contact with arsenic contaminated water [initial arsenic (1:1 As+3:As+5) concentration: 1 ppm] for 4 hours is sufficient for almost hundred percent removal of As+5 and 1:1 mixture of As+3:As+5, respectively, from water. | | Keywords : | | - Arsenic,Arsenic
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