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Study on Anodic Oxidation parameters for removal of pesticide Imidacloprid on a modified tantalum surface by lead dioxide film

Paper Topic: 
Advanced Oxidation Processes
 

Pages :
-

Corresponing Author: 
Mabrouk Ben Brahim
 
Authors: 
Mabrouk Ben Brahim, Sami Soukrata, Hafedh Belhadj Ammar, Youssef Samet
Paper ID: 
gnest_03119
Paper Status: 
Proof
Date Paper Accepted: 
09/01/2020
Paper online: 
16/1/2020
Abstract: 

The commercial imidacloprid (IMD) insecticide [1-(6-chloro-3-pyridinyl) methyl-4,5-dihydro-N-nitro-1H-imidazole-2-amine] is widely used for the enhancement of crop production, but the intensive use of this insecticide has caused serious environmental problems. This work presents an electrochemical process for the removal of this insecticide using galvanostatic electrolysis at modified tantalum surface by lead dioxide film anode (Ta(PbO2)) anode. The electrolytic process was monitored by chemical oxygen demand (COD). The influence of operating parameters, such as current density, initial concentration of IMD, temperature and initial pH value was investigated. The COD decay follows a pseudo first-order kinetic and the process was under mass transport control. COD removal reach 97% when using an apparent current density of 100 mA cm−2, initial COD of 953 mg L−1 and at 25 °C after 4.5 h electrolysis time.

Keywords: 
Imidacloprid; Electrochemical degradation; Anodic oxidation; Ta(PbO2) anode; Hydroxyl radicals.