| Preparation of Activated Carbon from Waste Tire Rubber
for the Active Removal of Cr(VI) and Mn(II) Ions
from Aqueous Solution |
Manju Showree Karmacharya,1 Vinod Kumar Gupta,2, 3 and Vinay Kumar Jha1, *
pages : 234-241
DOI : 10.1080/0371750X.2016.1228481 |
| Abstract |
| The activated carbon adsorbent was synthesized from waste tire rubber through
pyrolytic technique and characterized by CHNS elemental analysis, BET, XRD, FESEMEDX
and FTIR spectra. The adsorption of Cr(VI) and Mn(II) ions on thus obtained
adsorbent was investigated separately by varying experimental parameters, such as
pH, adsorbent dose, contact time, adsorbate ion concentration and temperature. The
adsorption processes were found to be the best fitted in Langmuir adsorption isotherm
model controlled by pseudo-second-order kinetics. The Cr(VI) and Mn(II) ions
adsorption capacity of AC were 14.45 and 3.04 mg.g–1, respectively. The rate constants
for the adsorptions of Cr(VI) and Mn(II) ions were 5.8810–1 and 3.9510–1 g.mg–1.min–1,
respectively. The thermodynamic study revealed the adsorption processes to be
spontaneous. |
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