Volume No. 3 Issue No.: 3 Page No.: 735-743 Jan-Mar 2009

 

POLYMER SUPPORTED SCHIFF BASE MANGANESE COMPLEXES FROM INDUSTRIAL WASTE WATER : AN EFFICIENT CATALYST FOR OXIDATION OF ALCOHOLS

 

M. Dhamodaran*1 and V.R. Parameswaran2

1. Department of Chemistry, Perunthalaivar Kamarajar Institute of Engineering and Technology (PKIET), Karaikal

 

Received on : December 14, 2008

 

ABSTRACT

 

Manganese is one of the most difficult elements to remove from surface water1-2. In drinking water sources, the secondary maximum contaminant level3 for Mn(II) ion must not exceed 0.05mg/L .Water used in industries creates a wastewater that has a potential hazard for our environment because of introducing various contaminants such as heavy metals into soil and water resources. In this study, removal of manganese from industrial wastewater has been investigated by using polystyrene-supported chelating polymer resins functionalized with Schiff base has been investigated. The effects of pH, time and initial concentration on the uptake of metal ions have been studied. The resulting catalysts were characterized by UV reflectance, infrared, scanning electronic microscope (SEM), 1H NMR and thermal studies.
This catalyst is active for oxidation of alcohols (primary, secondary and aromatic) using molecular oxygen at room temperature and atmospheric pressure. The reactions were carried out in Methanol-Toluene (1:1 mixture by volume) in a static reactor. Product analysis was done in some selected cases. The effect of parameters like concentration of the catalyst and substrate on the rate of reactions were investigated. The effect of polarity of the medium influences the rate of reactions. Recycling efficiency of the catalyst is excellent.

 

Keywords : Industrial Wastewater, Polymer resin, Schiff base, Uptake of metal ion, Oxidation of alcohols, Recyclability.

 

 

BACK