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A Novel Ternary Heterogeneous Tio2/Bivo4/Nay-Zeolite Nanocomposite for Photocatalytic Degradation of Microcystin-Leucine Arginine (Mc-Lr) Under Visible Light Publisher Pubmed



Ebrahimi A1 ; Jafari N1 ; Ebrahimpour K1 ; Karimi M2 ; Rostamnia S3 ; Behnami A4 ; Ghanbari R5 ; Mohammadi A4 ; Rahimi B1 ; Abdolahnejad A4
Authors
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Authors Affiliations
  1. 1. Environment Research Center, Research Institute for Primordial Prevention of Non-communicable disease, Isfahan University of Medical Sciences, Isfahan, Iran and department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Department of Chemistry, University of Isfahan, Isfahan, Iran
  3. 3. Organic and Nano Group (ONG), Department of Chemistry, Iran University of Science and Technology (IUST), Tehran, Iran
  4. 4. Department of Environmental Health Engineering, Maragheh University of Medical Sciences, Maragheh, Iran
  5. 5. Department of Environmental Health Engineering, Faculty of Health, Qazvin University of Medical Sciences, Qazvin, Iran

Source: Ecotoxicology and Environmental Safety Published:2021


Abstract

Microcystin-leucine arginine (MC-LR) is a carcinogenic toxin, produced by cyanobacteria. The release of this toxin into drinking water sources can threaten public health and environmental safety. Therefore, effective MC-LR removal from water resources is necessary. In the present study, the hydrothermal method was used to synthesize a novel ternary BiVO4/TiO2/NaY-Zeolite (B/T/N-Z) nanocomposite for MC-LR degradation under visible light. FESEM, FTIR, XRD, and DRS were performed for characterizing the nanocomposite structure. Also, the Response Surface Methodology (RSM) was applied to determine the impact of catalyst dosage, pH, and contact time on the MC-LR removal. High-performance liquid chromatography was performed to measure the MC-LR concentration. Based on the results, independent parameters, including contact time, catalyst dosage, and pH, significantly affected the MC-LR removal (P < 0.05). In other words, increasing the contact time, catalyst dosage, and acidic pH had positive effects on MC-LR removal. Among these variables, the catalyst dosage, with the mean square and F-value of 1041.37 and 162.84, respectively, had the greatest effect on the MC-LR removal efficiency. Apart from the interaction between the catalyst dosage and contact time, the interaction effects of other parameters were not significant. Also, the maximum MC-LR removal efficiency was 99.88% under optimal conditions (contact time = 120 min, catalyst dosage = 1 g/L, and pH = 5). According to the results, the B/T/N-Z nanocomposite, as a novel and effective photocatalyst could be used to degrade MC-LR from polluted water. © 2021 The Authors
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