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:: Volume 8, Issue 4 (9-2021) ::
jehe 2021, 8(4): 358-374 Back to browse issues page
Application of Ni-Doped ZnO Nanoparticles for the removal of 2,4-D Pesticide from aqueous Environment by Electro-photo catalytic Process
Hassan Pourmoslemi , Mahdi Farzadkia, Roshanak Rezaei, Mojtaba Yegane, Mahdi Hoseini, Mitra Gholami *
Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran -Department of Environmental Health Engineering, Faculty of Health, Iran University of Medical Sciences, Tehran, Iran
Abstract:   (219 Views)
Increasing use of pesticides along with an inadequate discharging of agricultural effluents has polluted water resources and severely affected the environment. 2,4-dichlorophenoxyacetic acid (2,4-D) is one of the herbicides which is widely used all over the world. The aim of this study was to evaluate the efficiency of an electro-photo catalytic process for the removal of the 2,4-D from aqueous media. In this regard, Zn-doped Ni anode was stabilized on FTO surface by sputtering method.
Materials and methods: In the present study, the effects of different variables on the efficiency of the electro-photo catalytic process such as pH (3, 5, 7, 9, and 11), electricity current (1-2 mA/cm2), electrode surface area (16-32 cm2), initial concentration of 2,4-D (10-50 mg/L) and retention time (0-90 min) were investigated in a batch model and on a laboratory scale. Besides, mineralization and kinetics of the process under the optimal conditions were studied. The residual concentration of 2,4-D was measured by HPLC at 283 nm.
Results: The results showed that the highest removal efficiency of 2,4-D was obtained under the following conditions: pH=7, electricity current=2 mA/cm2, electrode surface area=32 cm2, initial concentration=10 mg/L and retention time=90 min. Under the optimal conditions, the maximum removal efficiency (i.e., 100%) and TOC of 79.5% were achieved. In addition, the kinetic studies revealed that the current process followed the first-kinetic-order model.
Conclusion: According to the obtained results, the applied electro-photo catalytic process can be considered as a suitable method for the removal of 2,4-D in aqueous solutions.
Keywords: 2, 4-Dichlorophenoxyacetic acid, Electro-photo catalytic process, UV light.
Full-Text [PDF 994 kb]   (84 Downloads)    
Type of Study: Research | Subject: Special
Received: 2021/02/2 | Accepted: 2021/08/7 | Published: 2021/09/21
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Pourmoslemi H, Farzadkia M, Rezaei R, yegane M, Hoseini M, Gholami M. Application of Ni-Doped ZnO Nanoparticles for the removal of 2,4-D Pesticide from aqueous Environment by Electro-photo catalytic Process. jehe. 2021; 8 (4) :358-374
URL: http://jehe.abzums.ac.ir/article-1-872-en.html

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Volume 8, Issue 4 (9-2021) Back to browse issues page
مجله مهندسی بهداشت محیط Journal of Environmental Health Enginering
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