Preparation Of Activated Carbon From Organic Fraction of Municipal Solid Wastes by Zncl2 Activation Method And Use It For Elimination of Chromium(VI) From Aqueous Solutions, J. Iranian Chem. Soc., 2014, 11(4), 1075-1085. M. Zarzour, Ali A. Ensafi, B. Reza
In this study, the use of the organic fraction of
municipal solid waste as an abundant and low-cost raw
material for producing activated carbon was investigated.
For this purpose, ZnCl2 was used as a chemical activation
agent and the carbonization process took place at 800 C in
N2 atmosphere. Seven sorbents were prepared by chemical
activation (pyrolysis under N2 atmosphere at temperature
of 800 C after impregnation with ZnCl2) with different
ratios of ZnCl2. The optimum ratio of organic fraction of
municipal solid waste to ZnCl2 was inspected via methylene
blue number and iodine number (ASTM Designation:
D4607–94). The results showed that the adsorbent with
60 % ZnCl2/raw material was the most appropriate one
with a satisfactory adsorption capacity, 112.4 mg g-1 for
methylene blue and 134.0 mg g-1 for iodine. In addition,
the structural analysis of this sorbent was performed using
FT-IR, BET surface area, SEM–EDX and thermal analysis.
Application of this sorbent to remove Cr(VI) from wastewater
was studied to find an adsorption capacity of
66.7 mg g-1. The experimental adsorption equilibrium
data were fitted to Langmuir adsorption model with an
acceptable adsorption capacity of 66.7 mg g-1.