Adsorption of Chromium (VI) From Aqueous Solution Using Activated Carbon From the Pods of Wood Apple
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Date
2010
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Abstract
In this study activated carbon from pods of wood apple, an agro waste has been used as an
adsorbent for removal of Cr (VI) from aqueous solutions. Parameters, such as adsprbent dosage,
concentration of the adsorbate, contact time, and pH were optimized with regard to Cr
(VI) removal using the selected adsorbent. To analyze the efficiency of the activated carbon
from wood apple (ACW) the experiments were also conducted with commercial activated
carbon (ACC) and the result compared. The adsorption of Cr (VI) was found to be concentration
and pH dependent. Percentage removal of Cr (VI) increased with decrease in pH and
increase in adsorbent dosage for both ACC and ACW. On applying the adsorption data to
Langmuir equation, linear plots of 1/Ce vs x/m obtained shows that the adsorption of Cr (VI)
using activated carbon prepared from the pod of wood apple and commercially activated
carbon followed Langmuir adsorption isotherm. Thus adsorption technique using activated
carbon from agro wastes, like pods of wood apple is found to be an efficient method for the
removal of heavy metals, like Cr (VI) from aqueous solutions.