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Degradation of dyes by UV/Persulfate and comparison with other UV-based advanced oxidation processes: Kinetics and role of radicals.

التفاصيل البيبلوغرافية
العنوان: Degradation of dyes by UV/Persulfate and comparison with other UV-based advanced oxidation processes: Kinetics and role of radicals.
المؤلفون: Hoang NT; The University of Danang, University of Science and Education, Da Nang, 550 000, Viet Nam. Electronic address: nthoang@ued.udn.vn., Nguyen VT; The University of Danang, University of Science and Education, Da Nang, 550 000, Viet Nam., Minh Tuan ND; The University of Danang, University of Science and Technology, Da Nang, 550 000, Viet Nam., Manh TD; The University of Danang, University of Science and Education, Da Nang, 550 000, Viet Nam., Le PC; The University of Danang, University of Science and Technology, Da Nang, 550 000, Viet Nam., Van Tac D; The University of Danang, University of Science and Education, Da Nang, 550 000, Viet Nam., Mwazighe FM; Department of Chemistry, University of Nairobi, P. O. Box 30197, 00100, Nairobi, Kenya.
المصدر: Chemosphere [Chemosphere] 2022 Jul; Vol. 298, pp. 134197. Date of Electronic Publication: 2022 Mar 08.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Elsevier Science Ltd Country of Publication: England NLM ID: 0320657 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1298 (Electronic) Linking ISSN: 00456535 NLM ISO Abbreviation: Chemosphere Subsets: MEDLINE
أسماء مطبوعة: Publication: Oxford : Elsevier Science Ltd
Original Publication: Oxford, New York, : Pergamon Press.
مواضيع طبية MeSH: Water Pollutants, Chemical*/analysis , Water Purification*/methods, Coloring Agents ; Hydrogen Peroxide ; Kinetics ; Oxidation-Reduction ; Ultraviolet Rays
مستخلص: This study investigated the degradation of methylene blue (MeB), methyl orange (MeO), and rhodamin B (RhB) by the UV/Persulfate (UV/PS) process. The dye degradation in the investigated UV-based Advanced Oxidation Processes (UV/AOPs) followed the first-order kinetic model. The second-order rate constant of the dyes with •OH, SO 4 •- , and CO 3 •- were calculated and found to be: k •OH,MeB  = 5.6 × 10 9  M -1  s -1 , [Formula: see text]  = 3.3 × 10 9  M -1  s -1 , [Formula: see text]  = 6.9 × 10 7  M -1  s -1 ; k •OH,MeO  = 3.2 × 10 9  M -1  s -1 , [Formula: see text]  = 13 × 10 9  M -1  s -1 , [Formula: see text]  = 4.4 × 10 6  M -1  s -1 ; k •OH,RhB  = 14.8 × 10 9  M -1  s -1 , [Formula: see text]  = 5 × 10 9  M -1  s -1 , [Formula: see text]  = 1 × 10 7  M -1  s -1 . The steady-state concentrations of •OH and SO 4 •- (including other reactive species) were determined using both chemical probes and modeling methods (Kintecus® V6.8). In the UV/PS, the dye degradation depends on the pH of the solution with the order: k dye (at pH of 7) > k dye (in acidic conditions) > k dye (in alkaline conditions). The presence of water matrices had different impacts on dye degradation: 1) The HCO 3 - and Cl - promoted the degradation efficiency of one dye, but also inhibited the degradation of other dyes; 2) Humic acid (HA) inhibited dye degradation as it scavenged both •OH and SO 4 •- . The degradation of the dyes by UV/PS was also compared with the UV/Chlorine (UV/HOCl) and UV/H 2 O 2 and it was established that: 1) In UV/PS and UV/HOCl, SO 4 •- and RCS contributed to dye degradation more than •OH, while •OH played a major role in dye degradation by UV/H 2 O 2 ; 2) The calculated toxicity in UV/PS was the lowest probably due to the low toxicity of by-products; 3) For MeO and RhB, the UV/PS process is more beneficial for the total organic carbon (TOC) removal compared to that of the UV/HOCl and UV/H 2 O 2 processes; 4) The UV/PS showed lower cost than the UV/HOCl and UV/H 2 O 2 systems for MeO, and RhB degradation but higher cost for MeB removal.
(Copyright © 2022 Elsevier Ltd. All rights reserved.)
فهرسة مساهمة: Keywords: Advanced oxidation process; Degradation; Dye removal; Kinetics; Oxidizing species
المشرفين على المادة: 0 (Coloring Agents)
0 (Water Pollutants, Chemical)
BBX060AN9V (Hydrogen Peroxide)
تواريخ الأحداث: Date Created: 20220311 Date Completed: 20220506 Latest Revision: 20220506
رمز التحديث: 20240628
DOI: 10.1016/j.chemosphere.2022.134197
PMID: 35276111
قاعدة البيانات: MEDLINE
الوصف
تدمد:1879-1298
DOI:10.1016/j.chemosphere.2022.134197