bluuebunny/crossref_metadata_2025_split huggingface dataset:
Photocatalytic Degradation of Methylene Blue on Fixed Powder Layers: Which Limitations are to be Considered?
Authors: Tschirch Jessica , Dillert Ralf , Bahnemann Detlef 
Published: November 2016

AbstractOn the national (DIN) and international (ISO) level the determination of the photonic efficiency of the light-driven decolorization of methylene blue (MB) solutions in contact with a photocatalyst is currently being discussed as a standard method for testing and comparison of photocatalytic coatings. In this context it is necessary to make sure that the photocatalytic reaction of MB is a simple and robust method that meets the requirements of non-specialised laboratories in industry. Therefore, the photocatalytic degradation of methylene blue was studied using a fixed layer of Degussa P25 on soda lime glass as the photocatalyst substrate. The influence of the initial concentration of MB and of the intensity of the incident UV(A) light on the initial reaction rate and on the photonic efficiency was investigated in detail. It was observed, that both the initial concentration of MB as well as the incident light intensity strongly influences the degradation rate. Increasing the initial concentration of MB resulted in an increase of the initial reaction rate with a characteristic curvature in the direction of the concentration axis. The initial reaction rate was found to be not directly proportional to the incident light intensity. An increase of the photonic efficiency with decreasing initial MB concentration and decreasing light intensity was observed. A Langmuir-Hinshelwood rate law is used to discuss the implications of these observations with regard to the proposed standard method for testing and comparison of photocatalytic coatings.
Vacuum-UV- (VUV-) Photochemically Initiated Oxidation of Dimethylamine in the Gas Phase
Authors: Fethi Fouad , López-Gejo Juan , Köhler Martin , Braun André M. 
Published: November 2016

AbstractThe vacuum ultraviolet (VUV-) photochemical oxidation of dimethylamine in the gas phase was investigated in the presence and absence of molecular oxygen and water vapor. Primary intermediate products of the oxidative degradation were identified by the combination of gas chromatography and mass spectrometry (GC/MS), and the product distribution was determined for different experimental conditions. The evolution of the substrate concentration was followed by on-line gas chromatography. The production of CO
Remediation of Water Contaminated with Pesticides by Indirect Electrochemical Oxidation Process Electro-Fenton
Authors: Abdessalem Aida Kesraoui , Oturan Nihal , Bellakhal Nizar , Dachraoui Mohamed , Oturan Mehmet A. 
Published: November 2016

AbstractThe mineralization of pesticides chlortoluron, carbofuran and bentazone aqueous solutions in acidic medium of pH 3 was studied by electro-Fenton process using a carbon felt cathode and a platinum anode. This advanced oxidation process allows the formation of hydroxyl radical (
Treatment of Phenol, Formaldehyde and their Mixtures by Photocatalytic and Biological Methods
Authors: Araña J. , Melián J. A. Herrera , Ortega J. A. , Sánchez J. I. Macías , Peña J. Pérez 
Published: November 2016

AbstractPhenol and formaldehyde are toxic compounds present in many industrial wastewaters. Particularly, in synthetic resin producing industries the concentrations of one or both of these organics can reach concentrations of grams per litre. In the present work, the degradation of phenol, formaline (formaldehyde: methanol mixture) and their mixtures with photocatalytic and biological methods has been studied to determine the best strategy for the treatment of wastewaters containing those organics. Photocatalytic studies in batch and in continuous (by dosing) have been performed. Experiments in batch showed that formaline slows down phenol degradation. Another set of experiments with phenol-methanol mixtures revealed that the presence of this alcohol also slows down the degradation of phenol but less than the mixture formaldehyde: methanol. FTIR studies indicated the formation of 4-hydroxybenzaldehyde as a result of phenol-formaldehyde interaction with the catalyst surface. Thus, the lower phenol degradation rate is attributed to the formation of this aldehyde on the surface of the catalyst in addition to the ·OH scavenging effect of methanol. This inhibitory effect in the degradation was overcome by dosing the influent into the photocatalytic reactor. In the present work the biological systems have been employed to optimise and speed up the degradation process of phenol-formaldehyde mixtures. These systems have shown lower detoxification efficiency of the samples in comparison with that of the photocatalytic method with dosing. Taking into account the obtained results of degradation and toxicity, a novedous process consisting of a biological treatment followed by a photocatalytic one with dosage for the treatment of formaldehyde-phenol containing wastewaters is proposed.
Photocatalytic Inactivation of Wild and Hyper-Adherent E. Coli Strains in Presence of Suspended or Supported TiO2. Influence of the Isoelectric Point of the Particle Size and of the Adsorptive Properties of Titania
Authors: Bui T-H. , Felix C. , Pigeot-Remy S. , Herrmanna J-M. , Lejeune P. , Guillard C. 
Published: November 2016

AbstractThe photocatalytic inactivation of two E. coli strains, a wild strain and a hyper-adherent strain, was examined using two industrial TiO
Comparison of UV- and UV/VUV-Induced Photolytic and Heterogeneous Photocatalytic Degradation of Phenol, with Particular Emphasis on the Intermediates
Authors: Alapi Tünde , Gajda-Schrantz Krisztina , Ilisz István , Mogyorósi Károly , Sipos Pál , Dombi András 
Published: November 2016

AbstractThe application of UV photolysis (254 nm), UV/VUV photolysis (254/185 nm) and heterogeneous photocatalysis (TiO
Chemical Treatment by Fenton’s Reagent Oxidation and Ozonation of Wastewaters from Olive Oil Mill
Authors: Garcia Juan , Beltran-Heredia Jesus 
Published: November 2016

AbstractIn this work olive oil mill wastewater has been treated as first step by means of a Fenton’s reagent process and later by an ozonation treatment, in batch reactors in both cases. In the Fenton’s reagent oxidation step, a reduction of 33% and 90% is obtained for chemical oxygen demand and total polyphenolic compounds, respectively. In the ozonation step, ozone partial pressure and temperature were varied leading to chemical oxygen demand removal in the range 5 - 17% and total polyphenolic compounds removal in the range 26 - 62%. A kinetic study, which consideres mixed flow reactor model for both phases, allows to determine the rate constant for the ozone reaction in the reduction of chemical oxygen demand and total polyphenolic compounds. Kinetic rate constants were correlated with temperature to Arrhenius equations.
Design of CeyCoxTi (1-x) O3+δ Perovskite for Photocatalysis: A Statistical Study
Authors: Hudaya Tedi , Qazaq Amjad S. , Lucien Frank P. , Adesina Adesoji A. 
Published: November 2016

AbstractThe influence of metal composition and preparation pH on the properties and photoactivity of sol-gel synthesised Ce
Application of Photocatalysis for the Removal of Natural Organic Matter in Simulated Surface and Ground Waters
Authors: Uyguner Ceyda Senem , Bekbolet Miray 
Published: November 2016

AbstractNatural organic matter (NOM) is known to be present in all natural water systems. Due to the different characteristics of surface and ground waters, the photocatalytic degradation efficiency of NOMdepends on several inhibiting and enhancing factors. The presence of hardness causing divalent cations (Ca
Comparison of Emerging NSAID Pollutants Degradation in Aqueous Media by O3/UV-VIS Processes
Authors: Coelho Alessandra , Méndez-Arriaga Fabiola , Sans Carmen , Dezotti Márcia , Esplugas Santiago , Giménez Jaime 
Published: November 2016

AbstractThis paper studies the degradation and enhancement of biodegradability of Diclofenac and Ibuprofen, two widely used Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), by means of O
Scope of Metal Loaded Microporous Zeolite-Y as Catalyst in Ozone Initiated Oxidation of n-hexadecane
Authors: Pullabhotla V. S. R. Rajasekhar , Jonnalagadda S. B. 
Published: November 2016

AbstractThe efficiency of metal loaded microporous materials, zeolite-Y as catalysts in the ozone initiated oxy-functionalisation of long chained n-alkanes is investigated at moderate temperature (20 ± 1 °C) and pressure conditions (1 atm.). The efficiencies of 0.5% Pd, Ni, V and U loaded microporous zeolite-Y catalysts on ozonation of higher alkanes (n-hexadecane), with respect to the conversion and transformation towards keto products are compared. In the catalysed ozonation, n-hexadecane is converted to 4-, 3- and 2- keto isomers as major products with varied selectivity and % conversions. A plausible mechanism assuming the chemisorption of the substrate molecule on the catalyst surface and further electron transfer between the metal ion loaded on the zeolite support and the active intermediate formed in course of reaction for the ozone initiated oxidation of n-hexadecane with heterogeneous Ni loaded Na-Y zeolite catalyst is proposed.
Photocatalytic Degradation of Tetracycline Hydrochloride in Aqueous Solution at Ambient Conditions Stimulated by Gold Containing Zinc- Titanium Oxide Films
Authors: Linnik Oksana , Manuilov Evgenij , Snegir Sergii , Smirnova Natalia , Eremenko Anna 
Published: November 2016

AbstractIncorporation of gold species in the matrix of titania and zinc-containing titania films was applied for an improvement of their photocatalytic capability in the tetracycline hydrochloride (TC) destruction. Two different procedures of the gold metal generation by photo-thermo-reduction method were tested in this process. Multi-layered coatings of these films enhanced the rate of TC degradation as well as had effect on the reaction products. Reproducibility of the film activity was observed after several irradiation procedures without any additional treatment of the catalyst. Surface plasmon resonance band of gold nanoparticles was obviously shifted to the blue region in UV-vis absorption spectrum as a result of light action supposing the gold oxidation to ionic species. The plasmon band completely reverted to the original one upon exposure to air in the dark. Matrix-assisted laser desorption/ionization measurements confirmed the destruction of the cyclic structure of the antibiotics molecule.
Production of Titanium Dioxide Nanoparticles and Nanostructures from Dye Wastewater Sludge - Characterisation and Evaluation of Photocatalytic activity
Authors: El Saliby Ibrahim J. , Shon H. K. , Okour Yousef H. , Vigneswaran Saravanamuthu , Senthilnanthanan Meena , Kandasamy Jaya 
Published: November 2016

AbstractProducing a useful catalyst (TiO
Chlorophenols Contaminated Soil Remediation by Peroxidation
Authors: Goi Anna , Trapido Marina 
Published: November 2016

AbstractThe treatment with new peroxygen chemicals, such as calcium or magnesium peroxide and persulphate, was found to be effective for the chlorophenols contaminated soil remediation at natural soil pH. Contaminants in soil could be degraded with the addition of hydrogen peroxide or persulphate only indicating possible ability of natural catalysts presented in soil to activate the reaction of remedial chemicals decomposition. Chlorophenols could be also effectively (up to 80%) degraded, depending on the dosage, with the addition of calcium and magnesium peroxides. The combined strong remedies (hydrogen peroxide/persulphate) system was found to be an effective alternative for chlorophenols degradation in soil leading to a substantial organically bounded chlorine mineralization. The implementation of the treatment methods utilizing new chemicals of the peroxygen group was competitive with the treatment by hydrogen peroxide, resulting in a close or more effective degradation of chlorophenols in soil.
Arc Plasma for Materials Detoxification and their Conversion
Authors: Kolacinski Zbigniew , Szymanski Lukasz , Raniszewski Grzegorz 
Published: November 2016

AbstractThe paper presents own experience examples of plasma employing methods for gas and fluid waste destruction and solid waste conversion into valuable materials or products. Three of own design plasma reactors ROTARC, SPIRARC, PDUCR have been successfully used in the laboratory testing for gas and fluid chlorinated wastes and spent fluid chemical reagents destruction. A new approach to utilisation of mineral wastes using electric arc has been also presented. An immersed arc-plasma furnace IAF has been designed for this purpose. The conversion of toxic waste to the form of environmentally friendly and useful building materials is presented.
Ultrasound Synergistic Effect on the Photocatalytic Degradation of Eriochrome Blue Black B, C.I. Reactive Yellow 84, C.I. Reactive Red 195 and Methyl Orange in the Presence of Nanostructure Zinc Oxide Thin Film in Aqueous Environment
Authors: Habibi Mohammad Hossein , Sardashti Mohammad Khaledi 
Published: November 2016

AbstractBecause of the extensive use and excessive release of various dyes, the economical and efficient methods for treatment of wastewater and cleanup of dyes are needed. This study discusses the effects of ultrasound (US) irradiation on the degradation of Eriochrome blue black B (EBB), C.I. Reactive Yellow 84 (RY84), C.I. Reactive Red 195 (RR195) and methyl orange (MO) in UV/ZnO thin film system. The objective is to determine the ultrasound synergistic effect on the photocatalytic degradation of different dyes in the presence of nanostructure zinc oxide thin film (ZnO-TF) systems. In this paper, zinc oxide thin films were coated on glass through a simple spin and dip-coating method. The synthesized samples were structurally characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and atomic force microscope (AFM). Ultrasonic, UV irradiation and zinc oxide thin film (US/UV/ZnO-TF) system was used to degrade the above dyes in aqueous solution. The concentration of dyes was measured by UV-vis spectra at regular time intervals. It was found that the degradation ratio of EBB, RY84, RR195 and MO in the presence of US/UV/ZnO-TF system was much better than ultrasonic irradiation alone. Experiments were conducted at initial [Dye]=5.0 mg/L, ultrasonic frequency of 80 kHz, pH = 6.0 within 15 min. Reactive Yellow 84 and Reactive Red 195 were mineralized and ca. 95% TOC reduction was achieved by ultrasound and UV-visible light irradiation using ZnO-TF. Methyl orange was degraded more slowly than the others. Final products were, in all cases, CO
Significance of TiO2 Photocatalysis for Green Chemistry
Authors: Ravelli Davide , Fagnoni Maurizio , Dondi Daniele , Albini Angelo 
Published: November 2016

AbstractThe role of titanium dioxide photocatalysis in the frame of green chemistry is discussed on the basis of a review of published life cycle assessments. It appears that the environmental impact of photocatalysis when applied to the mineralization of pollutants is generally worse than that of other advanced oxidation processes when lamps are used, but becomes appealing under solar light. The potential of photocatalysis for organic synthesis - that in principle should minimize the generation of pollutants - is likewise discussed. Here again, however, the method is competitive with thermal procedures only when solar light is used.
A Study on the Removal of Natural Organic Matter and Disinfection Byproducts Formation Potential from Groundwater Using Fenton’s Process
Authors: Molnar Jelena J. , Agbaba Jasmina R. , Dalmacija Božo D. , Rončević Srđan D. , Maletić Snežana P. , Kragulj Marijana M. 
Published: November 2016

AbstractThis work investigates the efficiency of the Fenton process in removing natural organic matter (NOM) from groundwater. Previous studies focused mostly on the use of Fenton’s process to remove total organic matter, but this research also studies the conditions leading to the formation of hazardous disinfection by-product precursors, and their removal. Solutions of a commercial humic acid as a model of NOM and natural groundwater as a real matrix rich in NOM (dissolved organic carbon, DOC=9.92±0.87 mg/L) were studied. Under optimum reaction conditions, the respective removal efficiencies (expressed as DOC) were 95% from commercial humic acid solution and 82% from groundwater. The decrease in DOC resulted in 99% decrease of the content of precursors of trihalomethanes (THMs) and 98% of haloacetic acids (HAAs) for the investigated matrixes. Precursors of haloacetonitriles, haloketones and chloropicrin were detected at much lower concentrations than the THMs and HAAs precursors.
Formal Bimolecular Kinetic Model for the Ozonation of Ciprofloxacin in the Liquid Phase
Authors: Heynderickx Philippe M. , Demeestere Kristof , Dewulf Jo , De Witte Bavo , Van Langenhove Herman 
Published: November 2016

AbstractA bimolecular kinetic model is proposed for the liquid phase ozonation of organic components, incorporating direct and indirect ozonation by means of bimolecular reaction steps. One of the advantages of this model is that all radicals, present in the liquid phase, are lumped into one concentration, reducing the number of kinetic parameters. The main objective of this paper is to determine the degradation kinetics of ciprofloxacin (CIP), as model component for the class of fluoroquinolones, in order to validate the proposed kinetic model on available experimental data, obtained in a lab scale bubble column reactor. Additionally, different reactor models such as a continuous stirred tank reactor (CSTR) and a plug flow reactor (PFR) are compared in the description of the experimental data. A realistic mass transfer coefficient for ozone from the gas to the liquid phase of 1.65 10
Removing Estrogenic Steroids from Waters: The Role of Reducing Hydrated Electron Reactions
Authors: Rickman Kimberly A. , Mezyk Stephen P. 
Published: November 2016

AbstractThe presence of both synthetic and natural steroids in waters is currently one of the most pressing concerns to water treatment utilities. The use of radical-based advanced oxidation/reduction processes (AO/RPs) to augment standard water treatment methods may be of interest. In support of the application of these AO/RP rate constants have been determined for the reaction of the reducing hydrated electron (e
Recent Progress of Nano-Seconds Pulsed Discharge and its Applications
Authors: Wang Douyan , Namihira Takao , Akiyama Hidenori 
Published: November 2016

AbstractNon-thermal plasma has been widely used for various applications. The observation of discharge plasmas is an essential aspect for understanding the plasma physics of this growing field. Generally, a pulsed discharge having time duration of 100s nanoseconds consists of streamer head propagation, glow-like discharge and arc discharge phases. It is well known that the propagation phenomenon of the streamer head between electrodes is strongly influenced by the polarity of the applied voltage. Typically, both of the positive and negative streamer heads propagate with the acceleration, and the propagation velocity of the positive streamer head is faster than that of the negative one. In the present study, a nano-seconds pulsed power generator which can generate a pulsed voltage with 5 ns of duration and 2.5 ns of rise and fall times was developed, and the propagation of the positive and negative streamer heads were observed using this generator. The results show that the discharge phenomena are totally different from the general pulsed discharge. The average propagation velocity of the nano-seconds streamer heads was 6.1 mm/ns for 67 kV applied voltage, which is five times faster than that of the general one (100 ns of pulse duration). Furthermore, no significant difference of the propagation velocities was observed between the positive and negative applied voltages. The reason for the faster propagation velocity resulted in the nano-seconds pulsed discharge is the faster voltage rise time in comparison with the general pulsed discharge. Furthermore, the application using nano-seconds pulsed discharge for ozone generation showed highest energy efficiency than other discharge methods.
Decomposition of Trichloroethylene with Plasma-catalysis: A review
Authors: Vandenbroucke A. M. , Morent R. , De Geyter N. , Leys C. 
Published: November 2016

AbstractThe aim of this paper is to give a review of the research on the decomposition of trichloroethylene (TCE), a common industrial solvent, with combined use of non-thermal plasma and heterogeneous catalysis, i.e. plasma-catalysis. This air purification technique has been investigated over the last decade in an effort to overcome the disadvantages of non-thermal plasma treatment of waste air containing volatile organic compounds (VOCs). Some examples of different plasma technologies used for plasma-catalysis are given. These include the dielectric barrier discharge, the pulsed corona discharge and the atmospheric pressure glow discharge. In a plasma-catalytic hybrid system the catalyst can either be located in the discharge region or downstream of the plasma reactor. The mechanisms that drive both configurations are briefly discussed, followed by an extended literature overview of the removal of TCE with plasma-catalysis.
Treatment of Pharmaceutical-manufacturing Wastewaters by UV Irradiation/Hydrogen Peroxide Process
Authors: Bedoui Ahmed , Elsaid Khaled , Bensalah Nasr , Abdel-Wahab Ahmed 
Published: November 2016

AbstractIn this study, the treatment of pharmaceutical-manufacturing wastewaters (PMWW) by advanced chemical oxidation using UV irradiation/hydrogen peroxide (H
Hydroxylation of Phenol with Hydrogen Peroxide over the Ti-MWW Catalyst in the Presence of Acetonitrile
Authors: Wróblewska Agnieszka , Wójtowicz Grzegorz , Makuch Edyta 
Published: November 2016

AbstractThis work presents the results of phenol hydroxylation with hydrogen peroxide over the Ti-MWW catalyst. The studies were carried out under autogenic pressure and in the presence of acetonitrile as a solvent. The influence of the following technological parameters on the course of hydroxylation was examined: the temperature in the range of 100-150 °C, the molar ratio of phenol/H
The Influence of Solution Composition on the Effectiveness of Degradation of Ibuprofen Sodium Salt in a Hybrid Photocatalysis – Membrane Distillation System
Authors: Mozia Sylwia , Morawski Antoni W. , Toyoda Masahiro 
Published: November 2016

AbstractThe results of the investigations on the photodegradation of a non-steroidal anti-inflammatory drug ibuprofen sodium salt (IBU) in a photocatalytic membrane reactor (PMR) coupling photocatalysis using suspended TiO