Article

Adsorption of phenol and o-chlorophenol by mesoporous MCM-41.

Environmental Materials Unit, National Environmental Engineering Research Institute (CSIR), Nagpur 440 020, India.
Journal of Hazardous Materials (impact factor: 4.17). 12/2008; 160(2-3):414-21. DOI:10.1016/j.jhazmat.2008.03.013 pp.414-21
Source: PubMed

ABSTRACT Water pollution by toxic organic compounds is of concern and the demand for effective adsorbents for the removal of toxic compounds is increasing. Present work deals with the adsorption of phenol (PhOH) and o-chlorophenol (o-CP) on mesoporous MCM-41 material. The effect of surfactant template in MCM-41 on the removal of PhOH and o-CP was investigated. The comparison of adsorption of PhOH and o-CP on uncalcined MCM-41 (noted as MCM-41) and calcined MCM-41 (noted as C-MCM-41) was investigated. It was found that MCM-41 shows significant adsorption for PhOH and o-CP as compared to C-MCM-41, this may be because of the hydrophobicity created by surfactant template in the MCM-41. Batch adsorption studies were carried out to study the effect of various parameters like adsorbent dose, pH, initial concentration and the presence of co-existing ions. It was found that adsorption of PhOH and o-CP depends upon the solution pH as well as co-existing ions present in the aqueous solution. The equilibrium adsorption data for PhOH and o-CP was analyzed by using Freundlich adsorption isotherm model. From the sorption studies it was observed that the uptake of o-CP was higher than PhOH.

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Keywords

adsorbent dose
 
aqueous solution
 
Batch adsorption studies
 
co-existing ions
 
co-existing ions present
 
effective adsorbents
 
equilibrium adsorption data
 
Freundlich adsorption isotherm model
 
initial concentration
 
mesoporous MCM-41 material
 
o-chlorophenol
 
phenol
 
Present work deals
 
significant adsorption
 
solution pH
 
sorption studies
 
surfactant template
 
toxic organic compounds
 
various parameters
 
Water pollution