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Potential of carbon nanomaterials for removal of heavy metals from water

DSpace at IIT Bombay

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Title Potential of carbon nanomaterials for removal of heavy metals from water
 
Creator RUPARELIA, JP
DUTTAGUPTA, SP
CHATTERJEE, AK
MUKHERJI, SOUMYA
 
Subject carbon nanotubes
nanostructured materials
dewatering
heavy water
chemical vapor deposition
turpentine
 
Description Heavy metals, such as, cadmium, lead, nickel and zinc can be removed from water using sorbents. The rate and extent of removal may be enhanced by choice of appropriate sorbents. In this study heavy metal sorption was studied on indigenously synthesized carbon nanomaterials (CNMs). Two CNMs differing in surface morphology were synthesized using turpentine oil in a chemical vapour deposition (CVD) setup by varying the process parameters. Activation and catalyst removal were achieved by post-treatment with HNO3 and KOH. Characterization of the CNMs produced revealed that both comprised of graphitic amorphous carbon, however, while the nanocarbon (NC) produced using cobalt catalyst in N2 atmosphere comprised of varying grain sizes indicative of soot, the nanoporous carbon (NPC) produced using silica catalyst in H2 atmosphere had a distinctive uniformly porous surface morphology. Comparative sorption studies with cadmium, lead, nickel and zinc also revealed greater sorption on NPC compared to NC. Batch isotherms for the various heavy metals using NPC and a commercial activated carbon (AC) widely used for metal sorption revealed that NPC is characterized by significantly higher metal sorption capacity and more favourable sorption energetics. The superior performance of NPC as a sorbent may be due to its unique nanoporous structure.
 
Publisher Elsevier
 
Date 2009-05-18T12:06:49Z
2011-12-08T07:21:36Z
2011-12-26T13:02:06Z
2011-12-27T05:48:05Z
2009-05-18T12:06:49Z
2011-12-08T07:21:36Z
2011-12-26T13:02:06Z
2011-12-27T05:48:05Z
2008
 
Type Article
 
Identifier Desalination 232(1-3), 145-156
00119164
10.1016/j.desal.2007.08.023
http://hdl.handle.net/10054/1376
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1376
 
Language en