PHENOL REMOVAL FROM WASTEWATER BY OXIDATION METHOD USING ZEOLITE PREPARED LOCALLY

Nemat Hussein, Safaa; Husham Nussrat, Hala; Nsaif Abbas, Mohammed

	PHENOL REMOVAL FROM WASTEWATER BY OXIDATION METHOD USING ZEOLITE PREPARED LOCALLY
Journal of Engineering and Sustainable Development
Article 1, Volume 17, Issue 4, 2013, Pages 48-71
Authors
Safaa Nemat Hussein; Hala Husham Nussrat; Mohammed Nsaif Abbas
Abstract
A customary method to oxidize phenol, present in wastewater, was developed by using oxidation method in the presence of local faujasite type Y – zeolite catalyst prepared from Iraqi rice husk as a silica source and studying the behavior of this catalyst in a continuous bed reactor to remove phenol from hospital wastewater experimentally and theoretically by oxidation method. Experimental part of this investigation involved oxidize reaction of phenol, which was carried out using the above prepared catalyst at different variables which were the reaction temperature, weight hourly space velocity (WHSV), oxygen partial pressure, pH of feed solution, phenol initial concentration, catalyst bed height and gas flow rate were varied from (100–200°C), (1–5 h-1), (5–15 bar), (3–11), (2–10 mg/l), (40–80) cm and (20–100%) stochiometric excess respectively. The analysis of phenol remaining in samples produced from oxidation reaction was achieved using spectrophotometer equipment. In the theoretical part, Equilibrium and Rate Based or Nonequilibr-ium mathematical models were developed using MATLAB and FORTRUN simultaneously to solve MESHR equations, M: Material Balance, E: Equilibrium Relations, S: Summation Equations, H: Heat Balance and R: Reaction Equations. Rate Based model was developed depen-dence on Equilibrium model results and taking into account the effect of mass and heat transfer on material and energy balances. The general behavior of oxidation process indicates that phenol conversion increased with increasing temperature of reaction, oxygen partial pressure, gas flow rate, pH of feed solution, and height of catalyst bed while decreased with increasing pH, Weight Hourly Space Velocity (WHSV) and initial concentration of phenol. The conversion of phenol during oxidation process was 98.79 % using faujasite type Y– zeolite catalyst. The Kinetic results exhibit that the reaction is first and half orders with respect to phenol and oxygen respectively while the activation energy observed was 79.91 kJ/mol. The results of experimental work compar-ed with the results obtained from the developed program of Rate Based or Nonequilibrium model and the deviation shows distinct approximation in results with negligible error. Statistical model was also implemented to find a general expression relates all parameters used in this investigation in one equation. By this way we can remove the toxic phenol from hospital waste-water which was one of the materials that contaminated the water using a catalyst prepared from cheap material (IRH) and discarding it in a coast and eco-friendly method.
Keywords
Phenol Removal; wastewater; Oxidation and Type Y

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