Studies
on characterization and removal of methylene blue
with
Delonix regia plant litters activated carbon
encapsulated
nano metal oxide
S. Daniel1,
P.S. Syed Shabudeen1* and A. Basker2
1Kumaraguru
College of Technology, Coimbatore-641 006, India
2Kalaignar
Instiute of Technology, Coimbatore-641 402, India
*Corresponding
Author?s Email : shabu_cbe@yahoo.com
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Publication
Data
Paper received:
27 10 2013
Revised received:
07 June 2014
Re-revised received:
02 September 14
Accepted:
30 October 14
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Abstract
An
advanced adsorbent material prepared by encapsulating nano-metaloxide on an
activated carbon of Delonix regia plant litters was tested for its
efficiency and superiority as an improved, advanced activated carbon
material. It was subjected to modern instrumental techniques to evolve its
morphology and its structure by FTIR, SEM, TEM, XRD, EDAX and BET studies.
The size of MgO particles was in the range of 20nm-25 nm. The surface area of
nano composite was 632 m2 g-1. Experimental results,
based on batch mode of experiments, indicated that the adsorbent could remove
90% dye for the adsorbent dosage of 100 mg, at pH 7.0 and contact time of 120
min. The adsorption equilibrium data were well correlated for both, Langmuir
and Freundlich isotherms. The monolayer adsorption capacity Qo was found to
be 14.425 mg g-1 for the composite. The kinetic adsorption data
fitted the pseudo first order modeled by Lagergren and also intra particle
diffusion. Removal efficiency of the composite adsorbent was higher than the
uncoated adsorbents. Regeneration of exhausted adsorbent showed considerable
improved variation in comparison to normal activated carbon materials.
Key
words
Delonix
regia, Nano metal oxide composite, Scanning Electron Microscopy,
X-Ray Diffraction
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