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Khan SA, Jain M, Pant KK, Ziora ZM, Blaskovich MAT. Photocatalytic degradation of parabens: A comprehensive meta-analysis investigating the environmental remediation potential of emerging pollutant. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 920:171020. [PMID: 38369133 DOI: 10.1016/j.scitotenv.2024.171020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 02/12/2024] [Accepted: 02/14/2024] [Indexed: 02/20/2024]
Abstract
The increasing prevalence of paraben compounds in the environment has given rise to concerns regarding their detrimental impacts on both ecosystems and human health. Over the past few decades, photocatalytic reactions have drawn significant attention as a method to accelerate the otherwise slow degradation of these pollutants. The current study aims to evaluate the current efficacy of the photocatalytic method for degrading parabens in aqueous solutions. An extensive literature review and bibliometric analysis were conducted to identify key research trends and influential areas in the field of photocatalytic paraben degradation. Studies were screened based on the predetermined inclusion and exclusion criteria, which led to 13 studies that were identified as being appropriate for the meta-analysis using the random effects model. Furthermore, experimental parameters such as pH, paraben initial concentration, catalyst dosage, light intensity, and contact time have been reported to have key impacts on the performance of the photocatalytic degradation process. A comprehensive quantitative assessment of these parameters was carried out in this work. Overall, photocatalytic techniques could eliminate parabens with an average degradation efficiency of >80 %. The findings of the Egger's test and the Begg's test were statistically not significant suggesting potential publication bias was not observed. This review provides a holistic understanding of the photocatalytic degradation of parabens and is anticipated to encourage more widespread adoption of photocatalytic procedures as a suitable method for the elimination of parabens from aqueous solutions, opening new avenues for future research in this direction.
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Affiliation(s)
- Sadaf Aiman Khan
- The University of Queensland - Indian Institute of Technology Delhi Academy of Research (UQIDAR), India; Department of Chemical Engineering, Indian Institute of Technology (IIT) Delhi, New Delhi, India; Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Marut Jain
- The University of Queensland - Indian Institute of Technology Delhi Academy of Research (UQIDAR), India; Department of Chemical Engineering, Indian Institute of Technology (IIT) Delhi, New Delhi, India; Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Kamal Kishore Pant
- The University of Queensland - Indian Institute of Technology Delhi Academy of Research (UQIDAR), India; Department of Chemical Engineering, Indian Institute of Technology (IIT) Delhi, New Delhi, India.
| | - Zyta Maria Ziora
- The University of Queensland - Indian Institute of Technology Delhi Academy of Research (UQIDAR), India; Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Mark A T Blaskovich
- The University of Queensland - Indian Institute of Technology Delhi Academy of Research (UQIDAR), India; Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD 4072, Australia
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Shah SWH, Hameed F, Ali Z, Muntha ST, Bibi I. Degradation of cosmetic ingredient methylparaben by zinc oxide nanoparticles, aided by sonication, light or a combination of sonication and light. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2022. [DOI: 10.1080/16583655.2022.2131992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Syed W. H. Shah
- Department of Chemistry, Hazara University, Mansehra, Pakistan
| | - Fateeha Hameed
- Department of Chemistry, Hazara University, Mansehra, Pakistan
| | - Zarshad Ali
- Department of Chemistry, Hazara University, Mansehra, Pakistan
| | | | - Iram Bibi
- Department of Chemistry, Hazara University, Mansehra, Pakistan
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Cifre-Herrando M, Roselló-Márquez G, García-García DM, García-Antón J. Degradation of Methylparaben Using Optimal WO 3 Nanostructures: Influence of the Annealing Conditions and Complexing Agent. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4286. [PMID: 36500910 PMCID: PMC9740506 DOI: 10.3390/nano12234286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 11/28/2022] [Accepted: 11/30/2022] [Indexed: 06/17/2023]
Abstract
In this work, WO3 nanostructures were synthesized with different complexing agents (0.05 M H2O2 and 0.1 M citric acid) and annealing conditions (400 °C, 500 °C and 600 °C) to obtain optimal WO3 nanostructures to use them as a photoanode in the photoelectrochemical (PEC) degradation of an endocrine disruptor chemical. These nanostructures were studied morphologically by a field emission scanning electron microscope. X-ray photoelectron spectroscopy was performed to provide information of the electronic states of the nanostructures. The crystallinity of the samples was observed by a confocal Raman laser microscope and X-ray diffraction. Furthermore, photoelectrochemical measurements (photostability, photoelectrochemical impedance spectroscopy, Mott-Schottky and water-splitting test) were also performed using a solar simulator with AM 1.5 conditions at 100 mW·cm-2. Once the optimal nanostructure was obtained (citric acid 0.01 M at an annealing temperature of 600 °C), the PEC degradation of methylparaben (CO 10 ppm) was carried out. It was followed by ultra-high-performance liquid chromatography and mass spectrometry, which allowed to obtain the concentration of the contaminant during degradation and the identification of degradation intermediates. The optimized nanostructure was proved to be an efficient photocatalyst since the degradation of methylparaben was performed in less than 4 h and the kinetic coefficient of degradation was 0.02 min-1.
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Mild Fenton Processes for the Removal of Preservatives: Interfering Effect of Methylisothiazolinone (MIT) on Paraben Degradation. Catalysts 2022. [DOI: 10.3390/catal12111390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The degradation of various preservatives used in the cosmetics industry, including five parabens and their most employed substitute, methylisothiazolinone (MIT), was investigated. A mild photo-Fenton process was applied using low iron concentrations (5 mg/L) at a pH of five, instead of the traditional acidic value of three. At these conditions, the paraben degradation was very low after one hour of reaction and it was necessary to present humic-like substances (HLS) acting as iron chelators to improve the process. Values obtained when MIT was treated were very low, also in the presence of HLS, indicating that their complexing effect was not acting properly. When MIT was added to the mixture of parabens an inhibitory effect was found in the presence of HLS. A possible complex between iron and MIT was suggested and the studies of hydrogen peroxide consumption and Job’s plot technique confirmed this hypothesis. Evidence of the formation of this inactive complex, so far never reported, will be essential in future work when dealing with this compound using Fenton processes. Furthermore, this fact points out the importance of using mixtures of model contaminants instead of a single one or a group of the same family, since their ability to form active or inactive complexes with iron can strongly change the behavior of the whole system.
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Alegbeleye O, Daramola OB, Adetunji AT, Ore OT, Ayantunji YJ, Omole RK, Ajagbe D, Adekoya SO. Efficient removal of antibiotics from water resources is a public health priority: a critical assessment of the efficacy of some remediation strategies for antibiotics in water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:56948-57020. [PMID: 35716301 DOI: 10.1007/s11356-022-21252-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Accepted: 05/30/2022] [Indexed: 05/27/2023]
Abstract
This review discusses the fundamental principles and mechanism of antibiotic removal from water of some commonly applied treatment techniques including chlorination, ozonation, UV-irradiation, Fenton processes, photocatalysis, electrochemical-oxidation, plasma, biochar, anaerobicdigestion, activated carbon and nanomaterials. Some experimental shortfalls identified by researchers such as certain characteristics of degradation agent applied and the strategies explored to override the identified limitations are briefly discussed. Depending on interactions of a range of factors including the type of antibiotic compound, operational parameters applied such as pH, temperature and treatment time, among other factors, all reviewed techniques can eliminate or reduce the levels of antibiotic compounds in water to varying extents. Some of the reviewed techniques such as anaerobic digestion generally require longer treatment times (up to 360, 193 and 170 days, according to some studies), while others such as photocatalysis achieved degradation within short contact time (within a minimum of 30, but up to 60, 240, 300 and 1880 minutes, in some cases). For some treatment techniques such as ozonation and Fenton, it is apparent that subjecting compounds to longer treatment times may improve elimination efficiency, whereas for some other techniques such as nanotechnology, application of longer treatment time generally meant comparatively minimal elimination efficiency. Based on the findings of experimental studies summarized, it is apparent that operational parameters such as pH and treatment time, while critical, do not exert sole or primary influence on the elimination percentage(s) achieved. Elimination efficiency achieved rather seems to be due more to the force of a combination of several factors.
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Affiliation(s)
- Oluwadara Alegbeleye
- Department of Food Science and Nutrition, University of Campinas (UNICAMP), Rua Monteiro Lobato, 80, Campinas, SP, 13083-862, Brazil.
| | | | - Adewole Tomiwa Adetunji
- Department of Agriculture, Faculty of Applied Sciences, Cape Peninsula University of Technology, Wellington, Western Cape, 7654, South Africa
| | - Odunayo T Ore
- Department of Chemistry, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Yemisi Juliet Ayantunji
- Department of Microbiology, Obafemi Awolowo University, Ile-Ife, Nigeria
- Advanced Space Technology Applications Laboratory, Cooperative Information Network, National Space Research and Development Agency, Ile-Ife, P.M.B. 022, Nigeria
| | - Richard Kolade Omole
- Department of Microbiology, Obafemi Awolowo University, Ile-Ife, Nigeria
- Microbiology Unit, Department of Applied Sciences, Osun State College of Technology, Esa-Oke, Nigeria
| | - Damilare Ajagbe
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Oklahoma, USA
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González-Burciaga LA, Núñez-Núñez CM, Proal-Nájera JB. Challenges of TiO 2 heterogeneous photocatalysis on cytostatic compounds degradation: state of the art. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:42251-42274. [PMID: 34741739 DOI: 10.1007/s11356-021-17241-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 10/23/2021] [Indexed: 06/13/2023]
Abstract
The following work provides a perspective on the degradation of cytostatic pollutants through TiO2 heterogeneous photocatalysis. Cytostatic drugs are emerging pollutants used for cancer treatment found in hospital and domestic wastewater. Small amounts of cytostatic pollutants may pose severe health problems in human beings, animals, and plants after prolonged contact. This research presents a general review of some water treatment methods, such as aerobic activated sludge, enzymatic degradation, nanofiltration and chlorination, that have been used for the degradation or elimination of cytostatic drugs in wastewater. In recent years, photocatalysis has become important to solve this problem; these advanced oxidation process uses pure and modified TiO2 to degrade cytostatic contaminants and convert them into non-harmful substances or to eliminate them completely. This work contains a comprehensive review of the heterogeneous photocatalysis process and mechanism, and its application on the removal of cytostatic pollutants. Even if research on the topic is still scarce, this literature review provides interesting highlights on the scope of the research field, and the path such research could follow.
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Affiliation(s)
- Luis A González-Burciaga
- Instituto Politécnico Nacional, CIIDIR-Unidad Durango, Calle Sigma 119, Fracc. 20 de Noviembre II, Durango, 34220, México
| | - Cynthia M Núñez-Núñez
- Universidad Politécnica de Durango, Carretera Durango-México km 9.5, Col. Dolores Hidalgo, Durango, 34300, México
| | - José B Proal-Nájera
- Instituto Politécnico Nacional, CIIDIR-Unidad Durango, Calle Sigma 119, Fracc. 20 de Noviembre II, Durango, 34220, México.
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Peñas-Garzón M, Sampaio MJ, Wang YL, Bedia J, Rodriguez JJ, Belver C, Silva CG, Faria JL. Solar photocatalytic degradation of parabens using UiO-66-NH2. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.120467] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Álvarez MA, Ruidíaz-Martínez M, Rivera-Utrilla J, Sánchez-Polo M, López-Ramón MV. Effect of operational parameters on photocatalytic degradation of ethylparaben using rGO/TiO 2 composite under UV radiation. ENVIRONMENTAL RESEARCH 2021; 200:111750. [PMID: 34303683 DOI: 10.1016/j.envres.2021.111750] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/20/2021] [Accepted: 07/20/2021] [Indexed: 06/13/2023]
Abstract
The objective of this study was to analyze the influence of different operational variables (catalyst loading, initial EtP concentration, medium pH, the presence of anions and radical scavengers) on the performance of ethylparaben (EtP) photodegradation catalyzed with an rGO/TiO2 composite. EtP was selected for study after analyzing the effect of paraben chain length on its catalytic photodegradation, finding that the photodegradation rate constant values of methyl-, ethyl-, and butyl-paraben are 0.050, 0.096, and 0.136 min-1, respectively. This indicates that the photodegradation rate constant of parabens is higher with longer alkyl chain, which augments its oxidation capacity. The percentage removal of EtP at 40 min increases from 66.3 to 98.6 % when the composite dose rises from 100 to 700 mg/L; however, an additional increase in the composite dose to 1000 mg/L does not substantively improve the photodegradation rate or percentage EtP removal (98.9 %). A rise in the initial EtP concentration from 15 to 100 mg/L reduces the percentage of degradation from 100 to 76.4 %. The percentage EtP degradation is lower with higher solution pH. The presence of HCO3- or Cl- anions in the medium reduces the degradation performance. Results obtained using positive hole and hydroxyl radical scavengers demonstrate that positive holes play an important role in EtP degradation. No degradation product evidences toxicity against the cultured human embryonic kidney cell line HEK-293.
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Affiliation(s)
- Miguel A Álvarez
- Department of Inorganic and Organic Chemistry, Faculty of Experimental Science, University of Jaén, 23071, Jaén, Spain
| | - M Ruidíaz-Martínez
- Facultad de Ciencias, Universidad de Ciencias Aplicadas y Ambientales U.D.C.A., Bogotá, 111166, Colombia
| | - José Rivera-Utrilla
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain
| | - Manuel Sánchez-Polo
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain
| | - M Victoria López-Ramón
- Department of Inorganic and Organic Chemistry, Faculty of Experimental Science, University of Jaén, 23071, Jaén, Spain.
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9
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Fernandes RA, Sampaio MJ, Dražić G, Faria JL, Silva CG. Efficient removal of parabens from real water matrices by a metal-free carbon nitride photocatalyst. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 716:135346. [PMID: 31843308 DOI: 10.1016/j.scitotenv.2019.135346] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 10/31/2019] [Accepted: 11/01/2019] [Indexed: 06/10/2023]
Abstract
Metal-free graphite-like carbon nitride (GCN-500) was obtained by thermal post-treatment of bulk polymeric carbon nitride at 500 °C. The catalyst was thoroughly characterized by morphological, optical and textural analysis techniques. The efficiency of GCN-500 was evaluated under visible (λexc = 417 nm) LED excitation for the photocatalytic degradation of methyl-, ethyl- and propyl-paraben in different water matrices either isolated or in a mixture of the three compounds. The GCN-500 proved to be more efficient than the benchmark TiO2 P25, with complete conversion of the individual parabens within 20 min of irradiation, contrasting with 120 min needed for total degradation using TiO2. Experiments in the presence of selected scavengers confirmed the high importance of superoxide radicals in the photocatalytic oxidation of parabens using GCN-500. The effect of the nature of the aqueous matrix in the kinetics of the photocatalytic process was assessed using ultrapure, tap and river waters spiked with a mixture of the three parabens. Although still very efficient, the complexity of the real water samples turned the degradation process slower due to the presence of other components such as ions and dissolved organic matter. GCN-500 proved to be stable in a continuous-flow system using GCN-500 coated glass rings (GCN-500-GR) to remove MP, EP and PP from real water matrices.
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Affiliation(s)
- Raquel A Fernandes
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal
| | - Maria J Sampaio
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal
| | - Goran Dražić
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, Ljubljana, Slovenia
| | - Joaquim L Faria
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal
| | - Cláudia G Silva
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal.
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Improved performance of titanate nanostructures for manganese adsorption and posterior pollutants photocatalytic degradation. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.04.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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11
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Vela N, Calín M, Yáñez-Gascón MJ, Garrido I, Pérez-Lucas G, Fenoll J, Navarro S. Photocatalytic oxidation of six endocrine disruptor chemicals in wastewater using ZnO at pilot plant scale under natural sunlight. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:34995-35007. [PMID: 29558788 DOI: 10.1007/s11356-018-1716-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 03/09/2018] [Indexed: 06/08/2023]
Abstract
Endocrine disruptors (EDs) are xenobiotics that interfere with the synthesis, secretion, transport, binding, action, and elimination of the natural hormones. In this paper, the photodegradation of six EDs in municipal wastewater treatment plant effluents at pilot plant scale is reported. The EDs were bisphenol A, bisphenol B, diamyl phthalate, butyl benzylphthalate, methyl p-hydroxybenzoate, and ethyl 4-hydroxybenzoate. ZnO as photocatalyst in tandem with Na2S2O8 as electron acceptor under natural sunlight were used. The process was previously optimized under laboratory conditions through a photoreactor under artificial UVA irradiation studying the role of some key operating parameters (catalyst loading, effect of electron acceptor, and pH). Results carried out at pilot plant scale show that addition of ZnO in tandem with Na2S2O8 strongly enhances degradation rates compared with photolytic test. At the end of the irradiation time (240 min), the remaining amounts of EDs ranged from 24% (butyl benzylphthalate) to 0% (< LOQ bisphenol B). The degradation rates were in the order: bisphenols > parabens > phthalates. After the photoperiod, 83% of the initial dissolved organic carbon was removed and toxicity decreased to acceptable values (11% inhibition to Vibrio fisheri). The photodegradation process was found to follow pseudo-first-order kinetic model with DT50 ranging from 5 min (bisphenol B) to 102 min (butyl benzylphthalate). Thereby, photocatalytic oxidation using ZnO is an area of environmental interest for the treatment of polluted water, particularly relevant for Mediterranean countries, where solar irradiation is highly available.
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Affiliation(s)
- Nuria Vela
- Applied Technology Group to Environmental Health, Faculty of Health Science, Catholic University of Murcia, Campus de Los Jerónimos, s/n. Guadalupe, 30107, Murcia, Spain.
| | - May Calín
- Applied Technology Group to Environmental Health, Faculty of Health Science, Catholic University of Murcia, Campus de Los Jerónimos, s/n. Guadalupe, 30107, Murcia, Spain
| | - María J Yáñez-Gascón
- Applied Technology Group to Environmental Health, Faculty of Health Science, Catholic University of Murcia, Campus de Los Jerónimos, s/n. Guadalupe, 30107, Murcia, Spain
| | - Isabel Garrido
- Sustainability and Quality Group of Fruit and Vegetable Products, Murcia Institut of Agri-Food Research and Development, C/ Mayor s/n. La Alberca, 30150, Murcia, Spain
| | - Gabriel Pérez-Lucas
- Department of Agricultural Chemistry, Geology and Pedology, Faculty of Chemistry, University of Murcia, Campus Universitario de Espinardo, 30100, Murcia, Spain
| | - José Fenoll
- Sustainability and Quality Group of Fruit and Vegetable Products, Murcia Institut of Agri-Food Research and Development, C/ Mayor s/n. La Alberca, 30150, Murcia, Spain
| | - Simón Navarro
- Department of Agricultural Chemistry, Geology and Pedology, Faculty of Chemistry, University of Murcia, Campus Universitario de Espinardo, 30100, Murcia, Spain
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Kotzamanidi S, Frontistis Z, Binas V, Kiriakidis G, Mantzavinos D. Solar photocatalytic degradation of propyl paraben in Al-doped TiO2 suspensions. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.12.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Triclosan degradation by heterogeneous photocatalysis using ZnO immobilized in biopolymer as catalyst. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.05.014] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Castro I, Byzynski G, Dawson M, Ribeiro C. Charge transfer mechanism of WO 3 /TiO 2 heterostructure for photoelectrochemical water splitting. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.02.024] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Song C, Hu H, Ao H, Wu Y, Wu C. Removal of parabens and their chlorinated by-products by periphyton: influence of light and temperature. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:5566-5575. [PMID: 28032288 DOI: 10.1007/s11356-016-8301-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 12/19/2016] [Indexed: 06/06/2023]
Abstract
The extensive use of parabens as preservatives in food and pharmaceuticals and personal care products results in frequent detection of their residuals in aquatic environment. In this work, the adsorption and removal of four parabens (methyl-, ethyl-, propyl-, and butyl-paraben) and two chlorinated methyl-parabens (CMPs) by periphyton were studied. Characteristics of the periphyton were identified to explore the possible relationship between paraben removal and periphyton properties. Results showed that linear adsorption coefficients (K d) vary from 554.4 to 808.6 L kg-1 for the adsorption parabens and CMPs to autoclaved periphyton. The adsorption strength is positively related to the hydrophobicity of these compounds. Removal of parabens from water by periphyton was efficient with half-life (t 1/2) values estimated using first-order kinetic model ranging from 0.49 to 3.29 days, but CMPs were more persistent with t 1/2 ranging from 1.15 to 25.57 days, and t 1/2 increased with the chlorination degree. Higher incubation temperature accelerated the removal of all tested compounds, while a better removal of CMPs was observed in dark condition. Analysis of periphyton properties suggests that bacteria played a more important role in the removal of CMPs, but no specific relationship between periphyton properties and paraben removal ability can be established.
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Affiliation(s)
- Chaofeng Song
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road No. 7, Wuhan, 430072, People's Republic of China
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China
| | - Hongjuan Hu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road No. 7, Wuhan, 430072, People's Republic of China
| | - Hongyi Ao
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road No. 7, Wuhan, 430072, People's Republic of China
| | - Yonghong Wu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Chenxi Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road No. 7, Wuhan, 430072, People's Republic of China.
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