Advanced oxidation processes for the removal of organophosphorus pesticides from wastewater [An article from: Desalination]

This digital document is a journal article from Desalination, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
The combinations of the Fenton reaction, UV/H"2O"2 and the photo-Fenton process in the degradation of organophosphorus containing substrates such as fenitrothion, diazinon and profenofos were investigated. A laboratory set-up was designed to evaluate and select the optimal oxidation process. Several parameters were also studied: initial pH, COD/H"2O"2 ratios, Fe(II)/H"2O"2 ratios and the type of photocatalyst to define optimum operating conditions. The kinetic study indicated that the degradation rate of the used model substances was first order and the calculated reaction constants were affected by the parameters studied. The oxidation processes were repeated at the optimum operating conditions for the degradation of the mixture of the used model substances to represent the real wastewater effluent from a pesticide-producing company. A rough comparison of specific energy consumption was also evaluated to compare between the photochemical processes. The experimental results show that the light-enhanced Fenton reaction (photo-Fenton) proved to be a most effective and economic treatment process under acidic conditions and might be an alternative to other traditional processes.