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الأربعاء، 5 نوفمبر، 2014

Treatment of Industrial Wastewater Containing Dyes Using an Electrochemical Oxidation Method

Title: Treatment of Industrial Wastewater Containing Dyes Using an Electrochemical Oxidation Method
Author        : Amany Mohamed Saad
Collection   : M.Sc.Chemistry
     Abstract:
 Wastewater from textile industry contains large quantities of organic compounds, inorganic   salts and dyes.
The release of colored wastewater in the environment is a considerable source of pollution.
Therefore, proper treatment methods of wastewater have increasingly drawing attention.
The present study dealt with colour removal and chemical oxygen demand (COD) reduction using an array of Pb/PbO2 cylinders as anode and stainless steel screen as cathode in a batch recycle electrochemical unit for (acidic, direct, reactive, vat) dyes .
Operating variables such as current density, initial dye concentration, NaCl concentration, pH, and solution flow rate were investigated.
The results showed that the colour removal and COD reduction increase with the increase in current density, NaCl concentration, and solution flow rate while they decrease with the increase in pH and initial dye concentration.
Energy consumption based on colour removal was found to range from 0.26348  to 131.3677 kWh/kg dye removed depending on the operating conditions.
Finally, scanning electron microscopy (SEM) analysis was used to study the surface morphology of anode.
The use of horizontally oriented array of lead cylinders as anode has he potential of acting also as a built-in heat transfer facility to control the cell temperature especially in case of large scale cells where heat generation could adversely affect the process via increasing lead solubility and decreasing the current efficiency of Cl2 generation.

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