Degradation of Paracetamol by an UV/Chlorine Advanced Oxidation Process: Influencing Factors, Factorial Design, and Intermediates Identification

The combination of a low-pressure mercury lamp and chlorine (UV/chlorine) was applied as an emerging advanced oxidation process (AOP), to examine paracetamol (PRC) degradation under different operational conditions. The results indicated that the UV/chlorine process exhibited a much faster PRC removal than the UV/H2O2 process or chlorination alone because of the great contribution of highly reactive species (•OH, •Cl, and ClO•). The PRC degradation rate constant (kobs) was accurately determined by pseudo-first-order kinetics. The kobs values were strongly affected by the operational conditions, such as chlorine dosage, solution pH, UV intensity, and coexisting natural organic matter. Response surface methodology was used for the optimization of four independent variables (NaOCl, UV, pH, and DOM). A mathematical model was established to predict and optimize the operational conditions for PRC removal in the UV/chlorine process. The main transformation products (twenty compound structures) were detected by liquid chromatography coupled to high-resolution mass spectrometry (LC-HRMS).

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UV Based Advanced Oxidation Process for Degradation of Ciprofloxacin: Reaction Kinetics, Effects of Interfering Substances and Degradation Product Identification

10.21203/rs.3.rs-872896/v1 ◽

2021 ◽

Author(s):

Bijoli Mondal ◽

Shib Sankar Basak ◽

Arnab Das ◽

Sananda Sarkar ◽

Asok Adak

Keyword(s):

Organic Compounds ◽

Advanced Oxidation Process ◽

Oxidation Process ◽

Uv Light ◽

Degradation Products ◽

Irradiation Time ◽

Advanced Oxidation ◽

Quantum Yields ◽

Photon Flux ◽

First Order

Abstract In the photochemical UV-H2O2 advanced oxidation process, H2O2 absorbs UV light and is decomposed to form hydroxyl radicals (OH·), which are highly excited and reactive for electron-rich organic compounds and hence can degrade organic compounds. In the present work, the UV-H2O2 process was investigated to degrade ciprofloxacin (CIP), one of India's widely used antibiotics, from aqueous solutions using a batch type UV reactor having photon flux = 1.9 (± 0.1) ×10-4 Einstein L-1 min-1. The effects of UV irradiation time on CIP degradation were investigated for both UV and UV-H2O2 processes. It was found that about 75% degradation of CIP was achieved within 60 s with initial CIP concentration and peroxide concentration of 10 mg L-1 and 1 mol H2O2/ mol CIP, respectively, at pH of 7(±0.1) and fluence dose of 113 mJ cm-2. The experimental data were analyzed by the first-order kinetics model to find out the time- and fluence-based degradation rate constants. Under optimized experimental conditions (initial CIP concentration, pH and H2O2 dose of 10 mg L-1, 7(±0.1) and 1.0 mol H2O2 / mol CIP, respectively), the fluence-based pseudo-first-order rate constant for the UV and UV-H2O2 processes were determined to be 1.28(±0.0) ×10-4 and 1.20(±0.04) ×10-2 cm2 mJ-1 respectively. The quantum yields at various pH under direct UV were calculated. The impacts of different process parameters such as H2O2 concentration, solution pH, initial CIP concentration, and wastewater matrix on CIP degradation were also investigated in detail. CIP degradation was favorable in acidic conditions. Six degradation products of CIP were identified. Results clearly showed the potentiality of the UV-H2O2 process for the degradation of antibiotics in wastewater.

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Radicals induced from peroxomonosulfate by nanoscale zero-valent copper in the acidic solution

Water Science & Technology ◽

10.2166/wst.2016.381 ◽

2016 ◽

Vol 74 (8) ◽

pp. 1946-1952 ◽

Cited By ~ 10

Author(s):

Peng Zhou ◽

Bei Liu ◽

Jing Zhang ◽

Yongli Zhang ◽

Gucheng Zhang ◽

...

Keyword(s):

Advanced Oxidation Process ◽

Oxidation Process ◽

Acidic Solution ◽

Butyl Alcohol ◽

First Order ◽

First Order Kinetics ◽

Tert Butyl Alcohol ◽

Initial Ph ◽

Reactive Radicals ◽

Reactive Oxidant

A highly efficient advanced oxidation process for the degradation of benzoic acid (BA) during activation of peroxomonosulfate (PMS) by nanoscale zero-valent copper (nZVC) in acidic solution is reported. BA degradation was almost completely achieved after 10 min in the nZVC/PMS process at initial pH 3.0. PMS could accelerate the corrosion of nZVC in acidic to release Cu+ which can further activate PMS to produce reactive radicals. Both sulfate radical (SO4−•) and hydroxyl radical (•OH) were considered as the primary reactive oxidant in the nZVC/PMS process with the experiments of methyl (MA) and tert-butyl alcohol quenching. Acidic condition (initial pH ≤ 3.0) facilitated BA degradation and pH is a decisive factor to affect the oxidation capacity in the nZVC/PMS process. Moreover, BA degradation in the nZVC/PMS process followed the pseudo-first-order kinetics, and BA degradation efficiency increased with the increase of the nZVC dosage.

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Kinetic Study of Degradation of Basic Turquise Blue X-GB and Basic Blue X-GRRL using Advanced Oxidation Process

Zeitschrift für Physikalische Chemie ◽

10.1515/zpch-2018-1313 ◽

2020 ◽

Vol 234 (11-12) ◽

pp. 1803-1817 ◽

Cited By ~ 1

Author(s):

Naeem-Ul-Haq Khan ◽

Haq Nawaz Bhatti ◽

Munawar Iqbal ◽

Arif Nazir ◽

Hiratul Ain

Keyword(s):

Advanced Oxidation Process ◽

Oxidation Process ◽

Uv Light ◽

Correlation Coefficients ◽

Advanced Oxidation ◽

Optimum Conditions ◽

Oxidation Treatment ◽

First Order ◽

Fenton Oxidation Process ◽

Maximum Decolorization

AbstractThis study focuses on application of advanced oxidation (Photo-Fenton) processes to decolorize Basic Turquise Blue (BTB) X-GB 250% and Basic Blue (BB) X-GRRL 250% dyes. The percent decolorization was studied in terms of effect of variation in intensity of UV light at optimum conditions of all the parameters (pH = 3.0, H2O2 = 4.8 mM, FeSO4 = 1.6 mM, temperature = 50 °C, time = 80 min for BTB X-GB, and pH = 5.0, H2O2 = 5.6 mM, FeSO4 = 2.0 mM, temperature = 40 °C, time = 60 min for BB X-GRRL). Maximum decolorization was obtained at maximum intensity (15660 counts/min) of UV light as 96.17% for BTB X-GB and 88.48% for BB X-GRRL. First order, 2nd order and BMG kinetic models were used to analyze the data obtained for intensity of UV light. BMG model gives us the higher values of correlation coefficients for all data of both the dyes. The results have shown that Photo-Fenton oxidation process is the beneficial and effective for oxidation treatment of waste water effluents containing dyes as main pollutants.

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UV/chlorine as an advanced oxidation process for the degradation of benzalkonium chloride: Synergistic effect, transformation products and toxicity evaluation

Water Research ◽

10.1016/j.watres.2017.02.015 ◽

2017 ◽

Vol 114 ◽

pp. 246-253 ◽

Cited By ~ 47

Author(s):

Nan Huang ◽

Ting Wang ◽

Wen-Long Wang ◽

Qian-Yuan Wu ◽

Ang Li ◽

...

Keyword(s):

Synergistic Effect ◽

Benzalkonium Chloride ◽

Advanced Oxidation Process ◽

Oxidation Process ◽

Advanced Oxidation ◽

Transformation Products ◽

Toxicity Evaluation

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Using Peroxymonosulfate-Ozone Advanced Oxidation For The Treated Wastewater Disinfection and Amoxicillin Micro-Pollutant Removal Simultaneously

10.21203/rs.3.rs-947027/v1 ◽

2021 ◽

Author(s):

Gagik Badalians Gholikandi ◽

Atefeh Mollazadeh ◽

Hamidreza Farimaniraad ◽

Hamidreza Masihi

Keyword(s):

Removal Efficiency ◽

Advanced Oxidation Process ◽

Oxidation Process ◽

Wastewater Treatment Plants ◽

Oxygen Demand ◽

Advanced Oxidation ◽

Pollutant Removal ◽

Treated Wastewater ◽

Total Coliforms ◽

Operational Conditions

Abstract Due to the recent efforts to improve the conventional disinfection methods efficiency of wastewater treatment plants effluent, in this study, the efficiency of the peroxymonosulfate-ozone (PMS+O3) advanced oxidation process in lab scale by the aim of disinfection and simultaneous removal of existing amoxicillin micro-pollutant under optimum operational condition was investigated for the first time. Furthermore, the results were compared with those obtained from the experiments conducted employing persulfate-ozone (PS+O3), hydrogen peroxide-ozone (H2O2+O3), and ozonation (O3) processes. For this purpose, the main parameters including the total coliforms, amoxicillin concentration, turbidity, chemical oxygen demand (COD), biochemical oxygen demand (BOD5), total nitrogen (TN), electrical conductivity (EC), total dissolved solids (TDS), and total suspended solids (TSS) were considered. The test results show that under optimized operational conditions (retention time of 20 minutes, ozone dosage rate of 0.83 mmol/L, and peroxymonosulfate concentration of 0.06 mmol , 99.99% total coliforms (e.g., the number of total coliforms reached consistently less than 400 MPN in 100 ml) removal was reached by peroxymonosulfate-ozone advanced oxidation process. Also, amoxicillin concentration removal efficiency reached 90±2%. In comparison, although the total coliforms reduction of PS+O3 and H2O2+O3 methods in 30 min are approximately the same, the amoxicillin concentration removal efficiency is about 60-70%. Due to the importance of ensuring effluent quality, the related removal efficiency of other considered parameters is also evaluated and presented. Eventually, the peroxymonosulfate-ozone method can be considered as a novel efficient approach for wastewater plants effluent disinfection and amoxicillin micro-pollutant removal simultaneously which is a novel approach.

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Cyanide Containing Wastewater Treatment by Ozone Enhanced Catalytic Oxidation over Diatomite Catalysts

MATEC Web of Conferences ◽

10.1051/matecconf/201814201003 ◽

2018 ◽

Vol 142 ◽

pp. 01003

Author(s):

Mingguo Lin ◽

Qiyuan Gu ◽

Xinglan Cui ◽

Xingyu Liu

Keyword(s):

Catalytic Oxidation ◽

Advanced Oxidation Process ◽

Oxidation Process ◽

Removal Rate ◽

Order Rate Constant ◽

Alkaline Condition ◽

First Order ◽

First Order Kinetics ◽

Initial Ph ◽

The One

Cyanide containing wastewater that discharged from gold mining process creates environmental problems due to the toxicity of cyanide. As one of the promising advanced oxidation process, catalytic oxidation with ozone is considered to be effective on the purification of cyanide. Diatomite, a natural mineral, was used as catalyst in this study. The effect of O3 dosage, salinity, initial cyanide concentration and initial pH condition were investigated. It was observed that the removal rate of cyanide was much higher in the catalytic oxidation with ozone process than the one in zone alone process. Alkaline condition was especially favorable for cyanide in catalytic oxidation with ozone. The ozone and catalytic oxidation with ozone were simulated by pseudo-first-order kinetics model. The apparent first-order rate constant contribution of the diatomite catalyst was 0.0757 min-1, and the contribution percentage was 65.77%.

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A mini review of activated methods to persulfate-based advanced oxidation process

Water Science & Technology ◽

10.2166/wcc.2018.168 ◽

2018 ◽

Vol 79 (3) ◽

pp. 573-579 ◽

Cited By ~ 18

Author(s):

Wei Song ◽

Ji Li ◽

Zhuoyue Wang ◽

Xiaolei Zhang

Keyword(s):

Organic Pollutants ◽

Environmental Remediation ◽

Advanced Oxidation Process ◽

Oxidation Process ◽

Advanced Oxidation ◽

Oxidation Potential ◽

Solution Ph ◽

Oxidation Efficiency ◽

Organic Analytes

Abstract Persulfate-based advanced oxidation has been widely applied in environmental remediation for degrading contaminants. In recent years, numerous kinds of organic analytes including pesticides, dyes and pharmaceuticals, have emerged and related researches on the activation methods, the mechanism and the application have been performed. The activation is critical in persulfate-based advanced oxidation because the persulfate alone has a weaker oxidation potential to degrade these organic pollutants. Hence various activation methods have been extensively investigated to achieve a higher oxidation efficiency. These novel methods are gradually expanding the applicability and practicality. This review focuses on the classification of the different activation methods based on whether it is related to the substances or not. The effect of the environmental conditions (solution pH, dosage and the co-existing substance) on the oxidation capacity are also discussed.

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Kinetic of oxidation of methyl orange by vanadium(V) under conditions VO2+ and decavanadates coexist: Catalysis by Triton X-100 micellar medium

10.31221/osf.io/m9g7p ◽

2019 ◽

Author(s):

Chem Int

Keyword(s):

Methyl Orange ◽

Solution Ph ◽

Vanadium Concentration ◽

Limiting Behavior ◽

First Order ◽

First Order Kinetics ◽

Ph Range ◽

Kinetic Pattern ◽

Triton X ◽

Kinetics Of

The kinetics of oxidation of methyl orange by vanadium(V) {V(V)} has been investigated in the pH range 2.3-3.79. In this pH range V(V) exists both in the form of decavanadates and VO2+. The kinetic results are distinctly different from the results obtained for the same reaction in highly acidic solution (pH < 1) where V(V) exists only in the form of VO2+. The reaction obeys first order kinetics with respect to methyl orange but the rate has very little dependence on total vanadium concentration. The reaction is accelerated by H+ ion but the dependence of rate on [H+] is less than that corresponding to first order dependence. The equilibrium between decavanadates and VO2+ explains the different kinetic pattern observed in this pH range. The reaction is markedly accelerated by Triton X-100 micelles. The rate-[surfactant] profile shows a limiting behavior indicative of a unimolecular pathway in the micellar pseudophase.

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