Affiliations: Dept. of Chemistry, K.L. Mehta D.N. College for Women,
Faridabad (Haryana) – 121 001, India | Dept. of Chemistry, R.R. College, Alwar (Rajasthan)
– 301 001, India
Abstract: Dyes represent one of the problematic groups. Though commercial
activated carbon is a preferred sorbent for colour removal, its widespread use
is restricted due to high cost. In the present work, the steam activated
pigmented carbon prepared from rice husk (B.N. Oryza Sativa) was investigated
as an adsorbent to remove Amaranth dye from aqueous solutions. The adsorbent
was investigated under variable system parameters, such as, initial
concentration of the aqueous dye solution, agitation time, adsorbent amount and
temperature. The results of the present study have indicated that an amount of
0.8 g SAPRHC per litre could remove 43.0% of the dye from an aqueous solution
of 10 ppm with agitation time 300 minutes. The interactions were tested with
respect to both pseudo first-order and second-order kinetics. The later was
found to be more suitable. High value of q_m indicates high
capacity of adsorption and the value of the coefficient b indicates that the
interaction of dye with SAPRHC i.e. (dye + SAPRHC = dye....SAPRHC complex)
leads to the formation of a complex, being shifted overwhelmingly towards
adsorption. The results obtained indicate a potential use of SAPRHC for
removing dyes like Amaranth dye from water.
