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Evaluation of Cadmium removal Efficiency from aqueous solution by Activated Carbon Derived from Scrap Tire
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Edris Hoseinzadeh   , Ali Reza Rahmanie |
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Abstract: (5991 Views) |
| Introduction: Cadmium (Cd) is one of the main types of heavy metals having wide use in
today industrial age. This Heavy metal is very toxic even in very low amount
that can cause kidney damage, high blood pressure, bone fraction and
destruction of red blood cells. This study was performed with the purpose of
producing activated carbon from scrap tires and it’s application to removal of
Cd(II) ions from synthetic solution. Materials and Methods: In this experimental study, powder activated carbon derived from scrap
tires (TDAC) was prepared under laboratory conditions. Structural properties of
TDAC were analyzed using Scanning Electron Microscopy (SEM) coupled with energy
dispersive spectrometry (EDS). The special surface area was calculated using
Brunauer-Emmett-Teller (BET) and Barret-Joyner-Halenda (BJH) isotherms. In
adsorption studies, the effects of Cd(II) ions concentration, pH, contact time
and the adsorbent dosage on adsorption process were investigated in batch
system. The experimental data were analyzed with Langmuir and Freundlich
isotherm models. Results: The results showed that the efficiency of activated
carbon production is at 32-36% range. Main component of TDAC is Carbon
(76.78%). It’s special surface area using BET and BJH methods are approximately
185.046 and 146.443 m2/g, respectively. In adsorption studies, increasing of
TDAC dosage resulted in a decrease in qmax and also adsorption was increased
with increasing the pH, Cd+2 ions. The adsorption experimental data complies
with Freundlich equation model (R2 = 0.9987) and the maximum amount of
adsorption (qmax) was 83.33 mg/g. Conclusion: Results of this study show producing activated carbon from scrap tire can
have some economic and environmental
advantages and it can be introduced as a suitable method in order to recovery
of scrap tires. The produced activated carbon from scrap tires has high
efficiency for Cd removal from aqueous solutions. |
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| Keywords: Aqueous solution, Cadmium, Scrap tire, Activated carbon |
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Full-Text [PDF 1212 kb]
(1904 Downloads)
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Type of Study: Research |
Subject:
General
Received: 2013/09/7 | Accepted: 2014/03/11 | Published: 2014/06/11
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