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:: Volume 10, Issue 4 (Autumn 2023) ::
Environ. Health Eng. Manag. 2023, 10(4): 373-387 Back to browse issues page
Evaluation of the efficiency of the TiO2/UV nano-photocatalytic process in the removal of humic and fulvic acids from aqueous solutions
Mohammad Ali Zazouli , Yalda Hashempour , Alireza Ala
Corresponding author: Department of Environmental Health Engineering, School of Health, Health Sciences Research Center, Student Research Committee, Mazandaran University of Medical Sciences, Sari, Iran , ala_alireza@yahoo.com
Abstract:   (848 Views)
Background: Removing natural organic substances from drinking water sources is necessary to prevent the formation of toxic and carcinogenic disinfection by-products (DBPs). The nano-photocatalytic oxidation process to remove these substances is easier, faster, cheaper, and more efficient than other methods.
Methods: This study investigated the efficiency of the TiO2/UV nano-photocatalytic process in removing humic acid (HA) and fulvic acid (FA) from aqueous solutions. Batch tests were performed to investigate the effect of various parameters such as contact time (15, 30, 45, 60, and 75 minutes), initial pH (4, 7, and 9), initial HA and FA concentration (0.5, 1, 2, 5, and 7 mg/L-1), TiO2 dose (5, 10, 15 and 20 mg/L-1), and different UV irradiation (8 W and 16 W) for the removal of HA and FA from aqueous solutions using TiO2/UV at room temperature (20 ± 3 °C). The equilibrium adsorption data and the standard parameters were evaluated. Data were analyzed using SPSS version 25.
Results: The efficiency of this process in optimal conditions (pH: 4, anatase TiO2: 10 mg/L-1, irradiation time: 60 min, UV = 16 W) for removing humic and fulvic (initial HA concentration: 2 mg/L-1 and initial FA concentration: 5 mg/L-1) was 89% and 92%, respectively. The analysis of the experimental isotherm data showed that in the adsorption process of HA and FA on TiO2/UV, the Langmuir isotherm and the first-order reaction had the best fit with the experimental data.
Conclusion: TiO2/UV nano-photocatalytic process is suitable for the photo-degradation and removal of HA and FA in aqueous solutions.
Keywords: Humic substances, Titanium dioxide, Photocatalysis, Water purification, Water pollutants
Full-Text [PDF 2101 kb]   (493 Downloads)    
Type of Study: Original Article | Subject: Special
Received: 2023/10/16 | Accepted: 2023/10/18 | Published: 2023/12/26
Supplementary File [PDF 383 KB]  (35 Download)
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Zazouli M A, Hashempour Y, Ala A. Evaluation of the efficiency of the TiO2/UV nano-photocatalytic process in the removal of humic and fulvic acids from aqueous solutions. Environ. Health Eng. Manag. 2023; 10 (4) :373-387
URL: http://ehemj.com/article-1-1204-en.html


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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 10, Issue 4 (Autumn 2023) Back to browse issues page
Environmental Health Engineering And Management Journal Environmental Health Engineering And Management Journal
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