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Relevant bibliographies by topics / Caffeine, Photo-Fenton, Water, Kinetics / Journal articles

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Journal articles on the topic 'Caffeine, Photo-Fenton, Water, Kinetics'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Massella, Daniele, Edvige Celasco, Fabien Salaün, Ada Ferri, and Antonello Barresi. "Overcoming the Limits of Flash Nanoprecipitation: Effective Loading of Hydrophilic Drug into Polymeric Nanoparticles with Controlled Structure." Polymers 10, no. 10 (2018): 1092. http://dx.doi.org/10.3390/polym10101092.

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Flash nanoprecipitation (FNP) is a widely used technique to prepare particulate carriers based on various polymers, and it was proven to be a promising technology for the industrial production of drug loaded nanoparticles. However, up to now, only its application to hydrophobic compounds has been deeply studied and the encapsulation of some strongly hydrophilic compounds, such as caffeine, remains a challenge. Caffeine loaded poly-ε-caprolactone (PCL) nanoparticles were produced in a confined impinging jet mixer using acetone as the solvent and water as the antisolvent. Caffeine was dissolved

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2

Yoon, J., S. Kim, D. S. Lee, and J. Huh. "Characteristics of p-chlorophenol degradation by Photo Fenton oxidation." Water Science and Technology 42, no. 3-4 (2000): 219–24. http://dx.doi.org/10.2166/wst.2000.0383.

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This study investigated the characteristics of Photo Fenton oxidation in comparison with Fenton oxidation in dark environments. The specific objective was to provide an in-depth understanding as to how the presence of UV would effect the reaction and its efficiency as compared to the Dark Fenton Oxidation. All reactions were carried out in batch mode at an initial pH of 3.5, with H2O2 in excess and iron in catalytic concentrations. The medium pressure mercury lamp (320-400 nm) was used as a UV source. The role of UV in Photo Fenton Oxidation of p-chlorophenol was found to be manyfold as compar

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3

Wang, Shunwu, Ziwang Li, and Qinglong Yu. "Kinetic degradation of guar gum in oilfield wastewater by photo-Fenton process." Water Science and Technology 75, no. 1 (2016): 11–19. http://dx.doi.org/10.2166/wst.2016.470.

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Guar gum is considered as a main component of oilfield wastewater. This work is intended to optimize the experimental conditions (H2O2 dosage, Fe2+ dosage, initial concentration of organics, initial pH and temperature) for the maximum oxidative degradation of guar gum by Fenton's reagent. The kinetics of guar gum removal were evaluated by means of the chemical oxygen demand (COD) and the absorbance measurements. The batch experiment results showed that the optimum conditions were: H2O2 dosage, 10,000 mg/L; Fe2+dosage, 2,000 mg/L; initial concentration of organics, 413 mg/L; pH, 3 and temperatu

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4

Kuo, C. Y., C. Y. Pai, C. H. Wu, and M. Y. Jian. "Effects of oxidant concentration and temperature on decolorization of azo dye: comparisons of UV/Fenton and UV/Fenton-like systems." Water Science and Technology 65, no. 11 (2012): 1970–74. http://dx.doi.org/10.2166/wst.2012.095.

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This study applies photo-Fenton and photo-Fenton-like systems to decolorize C.I. Reactive Red 2 (RR2). The oxidants were H2O2 and Na2S2O8; Fe2+, Fe3+, and Co2+ were used to activate these two oxidants. The effects of oxidant concentration (0.3–2 mmol/L) and temperature (25–55 °C) on decolorization efficiency of the photo-Fenton and photo-Fenton-like systems were determined. The decolorization rate constants (k) of RR2 in the tested systems are consistent with pseudo-first-order kinetics. The rate constant increased as oxidant concentration and temperature increased. Activation energies of RR2

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5

Bensalah, Nasr, Mohammad I. Ahmad, and Ahmed Bedoui. "Catalytic Degradation of 4-Ethylpyridine in Water by Heterogeneous Photo-Fenton Process." Applied Sciences 9, no. 23 (2019): 5073. http://dx.doi.org/10.3390/app9235073.

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In this work, the degradation of 4-ethylpyridine (4EP) in water by a heterogeneous photo-Fenton process (H2O2/Fe3O4/ultraviolet irradiation (UV)) was investigated. More rapid and effective 4EP degradation was obtained with H2O2/Fe3O4/UV than Fenton-like (H2O2/Fe3O4) and UV/H2O2, which is due to the larger production of hydroxyl radicals from the chemical and photolytic decomposition of H2O2. The operational conditions were varied during 4EP degradation experiments to evaluate the effects of pH, catalyst, concentration, and temperature on the kinetics and efficiency of H2O2/Fe3O4/UV oxidation.

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6

Wei, Guangtao, Yunshang Li, Shuya Cai, Zhongmin Li, Jihua Mo, and Linye Zhang. "Photo-Fenton degradation of ethyl xanthate catalyzed by bentonite-supported Fe(II)/phosphotungstic acid under visible light irradiation." Water Science and Technology 2017, no. 2 (2018): 473–80. http://dx.doi.org/10.2166/wst.2018.174.

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Abstract In this study, using bentonite-supported Fe(II)/phosphotungstic acid composite (HPW-Fe-Organicbent) prepared by mechanochemical synthesis as heterogeneous catalyst, the photo-Fenton degradation of ethyl xanthate under visible light irradiation was studied in detail. The results showed that the degradation of ethyl xanthate was mainly impacted by H2O2 dosage, catalyst dosage and reaction time. HPW-Fe-Organicbent catalyst had a wide applicable range of pH and kept a high catalytic activity even at high pH in the photo-Fenton degradation of ethyl xanthate. It was found that the degradati

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7

Laftani, Yasmine, Abdelghani Boussaoud, Baylassane Chatib, Mohammed El Makhfouk, Mohsine Hachkar, and Mohammed Khayar. "Comparison of advanced oxidation processes for degrading Ponceau S dye. Application of photo-Fenton process." Macedonian Journal of Chemistry and Chemical Engineering 38, no. 2 (2019): 197. http://dx.doi.org/10.20450/mjcce.2019.1888.

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The major part of this work is devoted to the examination of the degradation of Ponceau S (PS) in aqueous medium by using the photo-Fenton process. The influence of pH of the medium, oxidant dose (H2O2), ferrous ion dose and the presence of inorganic ions such as bicarbonate, sulphate and nitrate on degradation kinetics was also analyzed. Before that, the efficiency of this process was compared to three other advanced oxidation processes (AOPs) such as H2O2/UV, Fenton (Fe2+/H2O2), and solar photo-Fenton. It was found that all dye degradation kinetics obeyed a pseudo-first order, and their appa

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8

Zaror, C., C. Segura, H. Mansilla, M. A. Mondaca, and P. González. "Effect of temperature on Imidacloprid oxidation by homogeneous photo-Fenton processes." Water Science and Technology 58, no. 1 (2008): 259–65. http://dx.doi.org/10.2166/wst.2008.661.

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This paper presents experimental results on the effect of temperature on the rate of Imidacloprid removal from waste water using homogeneous photo-Fenton processes. Experiments were conducted in a 2 L photo reactor set at 15–42°C, initial concentrations in the range of 10 to 40 mg L−1 Fe(II) and 100–450 mg L−1 H2O2; 30 150 min processing times. Initial H2O2 concentration determined the extent of the oxidation process, whereas iron concentration played a key role in the process kinetics. Homogeneous photo-Fenton showed a fast initial reaction leading to 50% Imidacloprid degradation after less t

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9

Vallés, Iván, Lucas Santos-Juanes, Ana M. Amat, Javier Moreno-Andrés, and Antonio Arques. "Effect of Salinity on UVA-Vis Light Driven Photo-Fenton Process at Acidic and Circumneutral pH." Water 13, no. 9 (2021): 1315. http://dx.doi.org/10.3390/w13091315.

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In the present work, the treatment of a mixture of six emerging pollutants (acetamiprid, acetaminophen, caffeine, amoxicillin, clofibric acid and carbamazepine) by means of photo-Fenton process has been studied, using simulated sunlight as an irradiation source. Removal of these pollutants has been investigated in three different aqueous matrices distinguished by the amount of chlorides (distilled water, 1 g L−1 of NaCl and 30 g L−1 of NaCl) at a pH of 2.8 and 5.0. Interestingly, the presence of 1 g L−1 was able to slightly accelerate the pollutants removal at pH = 5, although the reverse was

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10

Hwa, Lie, and Lieke Riadi. "Simulasi pengolahan limbah cair berwarna dengan foto fenton pada sistem kontinyu." Jurnal Teknik Kimia Indonesia 11, no. 2 (2018): 87. http://dx.doi.org/10.5614/jtki.2012.11.2.4.

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Simulation of Colored Waste Water Treatment Using Photo Fenton in Continuous System Waste water from coffee processing was treated by the Photo Fenton method. Experiments were carried out in a 2 liter batch reactor equipped with ultraviolet lamp for 4 hours. The synthetic waste water was made by dissolving 300 mg instant coffee in 1 liter water. Reagents used are 700 ppm H2O2 prepared from 30 % H2O2, and 15 ppm FeSO4.7H2O. The experiment was carried out at pH= 3. Prior to treatment, the color of the waste water was brownish yellow. After adding the fenton reagent under UV light exposure, the c

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11

Gonçalves, Nuno P. F., Zsuzsanna Varga, Edith Nicol, Paola Calza, and Stéphane Bouchonnet. "Comparison of Advanced Oxidation Processes for the Degradation of Maprotiline in Water—Kinetics, Degradation Products and Potential Ecotoxicity." Catalysts 11, no. 2 (2021): 240. http://dx.doi.org/10.3390/catal11020240.

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The impact of different oxidation processes on the maprotiline degradation pathways was investigated by liquid chromatography-high resolution mass spectrometry (LC/HRMS) experiments. The in-house SPIX software was used to process HRMS data allowing to ensure the potential singular species formed. Semiconductors photocatalysts, namely Fe-ZnO, Ce-ZnO and TiO2, proved to be more efficient than heterogeneous photo-Fenton processes in the presence of hydrogen peroxide and persulfate. No significant differences were observed in the degradation pathways in the presence of photocatalysis, while the SO

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12

Tokumura, Masahiro, Hussein Tawfeek Znad, and Yoshinori Kawase. "Decolorization of dark brown colored coffee effluent by solar photo-Fenton reaction: Effect of solar light dose on decolorization kinetics." Water Research 42, no. 18 (2008): 4665–73. http://dx.doi.org/10.1016/j.watres.2008.08.007.

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13

Tong, Alfred Y. C., Rhiannon Braund, Eng W. Tan, et al. "UV-induced photodegradation of oseltamivir (Tamiflu) in water." Environmental Chemistry 8, no. 2 (2011): 182. http://dx.doi.org/10.1071/en10095.

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Environmental contextOseltamivir (Tamiflu) is widely used to prevent and treat influenza but conventional wastewater processes involving sedimentation and biotic oxidation do not appear to significantly remove it from sewage, leading to its discharge into the environment. A range of advanced oxidation processes (AOPs) involving photolysis of aqueous solutions of oseltamivir with UV alone, UV/H2O2 and UV/H2O2/FeII is demonstrated to lead to photodegradation of oseltamivir to products with no ecotoxicity observed. These AOPs may therefore offer potentially environmentally friendly sewage water t

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14

López, Angélica Varón, Karen Herrera López, Stefanos Giannakis, and Norberto Benítez. "Effect of reactor material and its reuse on photo-Fenton process efficiency at near-neutral pH: Alterations in E. coli inactivation and resorcinol degradation kinetics in water." Journal of Photochemistry and Photobiology A: Chemistry 344 (July 2017): 228–37. http://dx.doi.org/10.1016/j.jphotochem.2017.04.019.

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15

Selvabharathi, G., S. Adishkumar, S. Jenefa, G. Ginni, J. Rajesh Banu, and Ick Tae Yeom. "Combined homogeneous and heterogeneous advanced oxidation process for the treatment of tannery wastewaters." Journal of Water Reuse and Desalination 6, no. 1 (2015): 59–71. http://dx.doi.org/10.2166/wrd.2015.139.

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This study investigated the practical application of combined advanced oxidation processes (AOPs), such as homogeneous TiO2 photocatalysis and heterogeneous photo-Fenton, for the treatment of tannery wastewaters. An optimization study was conducted on the photocatalytic degradation of tannery wastewaters, in order to understand the effects of different operating parameters on the degradation kinetics. The chemical oxygen demand of tannery wastewater decreased from an initial level of 3,400 mg/L in raw wastewater to 140 mg/L (96% removal) in wastewater treated by the combined advanced oxidation

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16

Park, Jeong-Ann, Hye-Lim Nam, Jae-Woo Choi, Junsoo Ha, and Sang-Hyup Lee. "Oxidation of geosmin and 2-methylisoborneol by the photo-Fenton process: Kinetics, degradation intermediates, and the removal of microcystin-LR and trihalomethane from Nak-Dong River water, South Korea." Chemical Engineering Journal 313 (April 2017): 345–54. http://dx.doi.org/10.1016/j.cej.2016.12.086.

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17

de Almeida, Lariana Negrão Beraldo, Tatiana Gulminie Josué, Michel Zampieri Fidelis, et al. "Process Comparison for Caffeine Degradation: Fenton, Photo-Fenton, UV/H2O2 and UV/Fe3+." Water, Air, & Soil Pollution 232, no. 4 (2021). http://dx.doi.org/10.1007/s11270-021-05115-1.

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18

Zaror, C. A., C. Segura, H. Mansilla, M. A. Mondaca, and P. González. "Detoxification of Waste Water Contaminated with Imidacloprid using Homogeneous and Heterogeneous Photo-Fenton Processes." Water Practice and Technology 4, no. 1 (2009). http://dx.doi.org/10.2166/wpt.2009.010.

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This paper presents experimental results on the removal of Imidacloprid from waste water using homogeneous and heterogeneous photo-Fenton processes. Experiments were conducted in a 2 L photo reactor, initial concentrations in the range 10 - 40 mg L-1 Fe(II) and 100 - 450 mg L-1 H2O2; 30 - 150 min processing times. Initial H2O2 concentration determined the extent of the oxidation process, whereas iron concentration played a key role in the process kinetics. Homogeneous photo-Fenton showed a fast initial reaction leading to 50% Imidacloprid degradation after less than 1 min treatment, followed b

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19

Villota, Natalia, Irene Coralli, and Jose M. Lomas. "Changes of dissolved oxygen in aqueous solutions of caffeine oxidized by photo-Fenton reagent." Environmental Technology, July 10, 2019, 1–9. http://dx.doi.org/10.1080/09593330.2019.1639830.

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20

Martínez-Pachón, Diana, Efraím A. Serna-Galvis, María Ibañez, et al. "Treatment of two sartan antihypertensives in water by photo-electro-Fenton using BDD anodes: Degradation kinetics, theoretical analyses, primary transformations and matrix effects." Chemosphere, December 2020, 129491. http://dx.doi.org/10.1016/j.chemosphere.2020.129491.

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21

Koprivanac, Natalija, and Dinko Vujevic. "Degradation of an Azo Dye by Fenton Type Processes Assisted with UV Irradiation." International Journal of Chemical Reactor Engineering 5, no. 1 (2007). http://dx.doi.org/10.2202/1542-6580.1462.

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Organic synthetic dyes are widely produced and used today. Significant losses of organic and inorganic content occurs during the manufacturing and application of dyes and its discharge in the effluent presents a threat to the eco-systems due to general toxicity and resistance to destruction by biological treatment methods. Particularly azo dyes are of special environmental concern due to their degradation products such as aromatic amines, which are considered highly carcinogenic. So, dyes have to be removed from coloured wastewater before discharge. However, traditional treatment methods (adso

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22

Thanh Huyen, Le, Dao Sy Duc, Nguyen Xuan Hoan, Nguyen Huu Tho, and Nguyen Xuan Viet. "Synthesis of Fe3O4-Reduced Graphene Oxide Modified Tissue-Paper and Application in the Treatment of Methylene Blue." VNU Journal of Science: Natural Sciences and Technology 35, no. 3 (2019). http://dx.doi.org/10.25073/2588-1140/vnunst.4883.

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Graphene-based composites have received a great deal of attention in recent year because the presence of graphene can enhance the conductivity, strength of bulk materials and help create composites with superior qualities. Moreover, the incorporation of metal oxide nanoparticles such as Fe3O4 can improve the catalytic efficiency of composite material. In this work, we have synthesized a composite material with the combination of reduced graphene oxide (rGO), and Fe3O4 modified tissue-paper (mGO-PP) via a simple hydrothermal method, which improved the removal efficiency of the of methylene blue

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