Volume 13, Issue 2 (7-2025)
J Environ Health Eng 2025, 13(2): 233-250 |
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Ethics code: IR.MUK.REC.1401.145
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Rezaee R, Safari M, Yosefi S, Mohammadi S. Evaluation of the efficiency of photocatalytic degradation process using Mo/ZnO nanoparticles stabilized on pottery in removing natural organic matter from water. J Environ Health Eng 2025; 13 (2) :233-250
URL: http://jehe.abzums.ac.ir/article-1-1120-en.html
URL: http://jehe.abzums.ac.ir/article-1-1120-en.html
Environmental Health Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran & Department of Environmental Health Engineering, Faculty of Health, Kurdistan University of Medical Sciences, Sanandaj, Iran , Safari.m.eng@gmail.com
Abstract: (35 Views)
Background: The presence of organic pollutants in water resources is a serious threat to human health. The photocatalytic degradation process is a novel method for the efficient removal of these pollutants in water purification. The purpose of this study is to investigate the effect of photocatalytic process using molybdenum/zinc oxide nanoparticles immobilized on clay plates for removing organic matter in water.
Materials and Method: This study was carried out experimentally using a laboratory reactor with a volume of 1 liter and equipped with a stirrer, three clay plates coated with nanoparticles and 5 UV lamps in a discontinuous manner. Zinc oxide and zinc oxide/molybdenum nanoparticles were synthesized by hydrothermal method and characterized by SEM, XRD and FTIR analysis. The effect of operating parameters including initial concentrations of humic acid, contact time, dopant percentage, amount of catalyst, radiation intensity and pH on the removal efficiency of organic matter was investigated.
Results: The results showed that with an increase in pH from 3 to 11 and initial concentration of humic acid from 10 to 80 mg/L the efficiency of organic matter removal decreased by 53.7 and 65.5% respectively, but with an increase in the amount of nanoparticles from 2 to 8 mg/cm2, contact time from 10 to 120 minutes, dopant from 0.5 to 2% and radiation intensity from 0.75 to 0.265 w/m2, the efficiency of organic matter removal increased by 33.93, 52.45, 11.7 and 42.02% respectively. In addition, the results showed that under the same conditions, the efficiency of the photocatalytic process for removing organic matter using Mo/ZnO is 22.97% higher than the efficiency of this process with pure ZnO.
Conclusion: According to the findings of this research, it can be stated that the use of photocatalytic degradation process using molybdenum/zinc oxide nanoparticles is an efficient method to removing organic pollutants in water.
Materials and Method: This study was carried out experimentally using a laboratory reactor with a volume of 1 liter and equipped with a stirrer, three clay plates coated with nanoparticles and 5 UV lamps in a discontinuous manner. Zinc oxide and zinc oxide/molybdenum nanoparticles were synthesized by hydrothermal method and characterized by SEM, XRD and FTIR analysis. The effect of operating parameters including initial concentrations of humic acid, contact time, dopant percentage, amount of catalyst, radiation intensity and pH on the removal efficiency of organic matter was investigated.
Results: The results showed that with an increase in pH from 3 to 11 and initial concentration of humic acid from 10 to 80 mg/L the efficiency of organic matter removal decreased by 53.7 and 65.5% respectively, but with an increase in the amount of nanoparticles from 2 to 8 mg/cm2, contact time from 10 to 120 minutes, dopant from 0.5 to 2% and radiation intensity from 0.75 to 0.265 w/m2, the efficiency of organic matter removal increased by 33.93, 52.45, 11.7 and 42.02% respectively. In addition, the results showed that under the same conditions, the efficiency of the photocatalytic process for removing organic matter using Mo/ZnO is 22.97% higher than the efficiency of this process with pure ZnO.
Conclusion: According to the findings of this research, it can be stated that the use of photocatalytic degradation process using molybdenum/zinc oxide nanoparticles is an efficient method to removing organic pollutants in water.
Type of Study: Research |
Subject:
Special
Received: 2025/04/6 | Accepted: 2025/05/26 | Published: 2025/07/16
Received: 2025/04/6 | Accepted: 2025/05/26 | Published: 2025/07/16
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