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Salimi M, Esrafili A, Gholami M, Jonidi Jafari A, Rezaei Kalantary R, Farzadkia M, Kermani M, Sobhi HR. Contaminants of emerging concern: a review of new approach in AOP technologies. ENVIRONMENTAL MONITORING AND ASSESSMENT 2017; 189:414. [PMID: 28741247 DOI: 10.1007/s10661-017-6097-x] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 06/23/2017] [Indexed: 05/06/2023]
Abstract
The presence of contaminants of emerging concern (CECs) such as pharmaceuticals and personal care products (PPCPs), endocrine-disrupting compounds (EDCs), flame retardants (FRs), pesticides, and artificial sweeteners (ASWs) in the aquatic environments remains a major challenge to the environment and human health. In this review, the classification and occurrence of emerging contaminants in aquatic environments were discussed in detail. It is well documented that CECs are susceptible to poor removal during the conventional wastewater treatment plants, which introduce them back to the environment ranging from nanogram per liter (e.g., carbamazepine) up to milligram per liter (e.g., acesulfame) concentration level. Meanwhile, a deep insight into the application of advanced oxidation processes (AOPs) on mitigation of the CECs from aquatic environment was presented. In this regard, the utilization of various treatment technologies based on AOPs including ozonation, Fenton processes, sonochemical, and TiO2 heterogeneous photocatalysis was reviewed. Additionally, some innovations (e.g., visible light heterogeneous photocatalysis, electro-Fenton) concerning the AOPs and the combined utilization of AOPs (e.g., sono-Fenton) were documented.
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Affiliation(s)
- Maryam Salimi
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Ali Esrafili
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
| | - Mitra Gholami
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Ahmad Jonidi Jafari
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Roshanak Rezaei Kalantary
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Mahdi Farzadkia
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Majid Kermani
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
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52
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Wang J, Sun Y, Jiang H, Feng J. Removal of caffeine from water by combining dielectric barrier discharge (DBD) plasma with goethite. JOURNAL OF SAUDI CHEMICAL SOCIETY 2017. [DOI: 10.1016/j.jscs.2016.08.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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53
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Urbano VR, Peres MS, Maniero MG, Guimarães JR. Abatement and toxicity reduction of antimicrobials by UV/H 2O 2 process. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 193:439-447. [PMID: 28242114 DOI: 10.1016/j.jenvman.2017.02.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 02/08/2017] [Accepted: 02/12/2017] [Indexed: 06/06/2023]
Abstract
Antimicrobials are continuously detected in environmental waters and their removal is important to avoid health and microorganisms damage. In this work, the peroxidation assisted by ultraviolet radiation (UV/H2O2) was studied to verify if the process was able to degrade sulfaquinoxaline and ofloxacin antimicrobials and to remove the toxicity and the antimicrobial activity of the solution. This process was effective on degradation of the antimicrobials, despite the antimicrobial activity removal, the toxicity of the solution increased throughout the reaction time.
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Affiliation(s)
- Vanessa Ribeiro Urbano
- School of Civil Engineering, Architecture and Urban Design, University of Campinas, P.O. Box 6143, CEP 13083-889, Campinas, Brazil
| | - Marcela Souza Peres
- School of Civil Engineering, Architecture and Urban Design, University of Campinas, P.O. Box 6143, CEP 13083-889, Campinas, Brazil
| | - Milena Guedes Maniero
- School of Civil Engineering, Architecture and Urban Design, University of Campinas, P.O. Box 6143, CEP 13083-889, Campinas, Brazil
| | - José Roberto Guimarães
- School of Civil Engineering, Architecture and Urban Design, University of Campinas, P.O. Box 6143, CEP 13083-889, Campinas, Brazil.
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54
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Bianco Prevot A, Baino F, Fabbri D, Franzoso F, Magnacca G, Nisticò R, Arques A. Urban biowaste-derived sensitizing materials for caffeine photodegradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:12599-12607. [PMID: 27696166 DOI: 10.1007/s11356-016-7763-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 09/21/2016] [Indexed: 06/06/2023]
Abstract
Caffeine-photosensitized degradation has been studied in the presence of bio-based materials derived from urban biowaste after aerobic aging. A peculiar fraction (namely bio-based substances (BBSs)), soluble in all the pH range, has been used as photosensitizing agent. Several caffeine photodegradation tests have been performed, and positive results have been obtained in the presence of BBSs and H2O2, without and with additional Fe(II) (photo-Fenton-like process). Moreover, hybrid magnetite-BBS nanoparticles have been synthesized and characterized, in order to improve the sensitizer recovery and reuse after the caffeine degradation. In the presence of such nanoparticles and H2O2 and Fe(II), the complete caffeine degradation has been attained in very short time. Both homogeneous and heterogeneous processes were run at pH = 5, milder condition compared to the classic photo-Fenton process.
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Affiliation(s)
- A Bianco Prevot
- Dipartimento di Chimica, Università degli Studi di Torino, Torino, Italy.
| | - F Baino
- Dipartimento di Chimica, Università degli Studi di Torino, Torino, Italy
| | - D Fabbri
- Dipartimento di Chimica, Università degli Studi di Torino, Torino, Italy
| | - F Franzoso
- Dipartimento di Chimica, Università degli Studi di Torino, Torino, Italy
| | - G Magnacca
- Dipartimento di Chimica, Università degli Studi di Torino, Torino, Italy
- NIS Centre, Via Giuria 7, Torino, Italy
| | - R Nisticò
- Dipartimento di Chimica, Università degli Studi di Torino, Torino, Italy
| | - A Arques
- Dpto de Ingeniería Textil y Papelera, Universitat Politècnica de València, Plaza Ferrándiz y Carbonell s/n, Alcoy, Spain
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55
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Souza BM, Marinho BA, Moreira FC, Dezotti MWC, Boaventura RAR, Vilar VJP. Photo-Fenton oxidation of 3-amino-5-methylisoxazole: a by-product from biological breakdown of some pharmaceutical compounds. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:6195-6204. [PMID: 26555882 DOI: 10.1007/s11356-015-5690-1] [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: 09/04/2015] [Accepted: 10/23/2015] [Indexed: 06/05/2023]
Abstract
The present study aims to assess the removal of 3-amino-5-methylisoxazole (AMI), a recalcitrant by-product resulting from the biological breakdown of some pharmaceuticals, applying a solar photo-Fenton process assisted by ferrioxalate complexes (SPFF) (Fe3+/H2O2/oxalic acid/UVA-Vis) and classical solar photo-Fenton process (SPF) (Fe2+/H2O2/UVA-Vis). The oxidation ability of SPFF was evaluated at different iron/oxalate molar ratios (1:3, 1:6, and 1:9, with [total iron] = 3.58 × 10-2 mM and [oxalic acid] = 1.07 × 10-1, 2.14 × 10-1 and 3.22 × 10-1 mM, respectively) and pH values (3.5-6.5), using low iron contents (2.0 mg Fe3+ L-1). Additionally, the use of other organic ligands such as citrate and ethylenediamine-N,N'-disuccinic acid (EDDS) was tested. The oxidation power of the classical SPF was assessed at different pH values (2.8-4.0) using 2.0 mg Fe2+ per liter. Furthermore, the effect of AMI concentration (2-20 mg L-1), presence of inorganic ions (Cl-, SO42-, NO3-, HCO3-, NH4+), and radical scavengers (sodium azide and D-mannitol) on the SPF method at pH 3.5 was also assessed. Experiments were done using a lab-scale photoreactor with a compound parabolic collector (CPC) under simulated solar radiation. A pilot-scale assay was conducted using the best operation conditions. While at near neutral pH, an iron/oxalate molar ratio of 1:9 led to the removal of 72 % of AMI after 90 min of SPFF, at pH 3.5, an iron/oxalate molar ratio of 1:3 was enough to achieve complete AMI degradation (below the detection limit) after 30 min of reaction. The SPF process at pH 3.5 underwent a slower AMI degradation, reaching total AMI degradation after 40 min of reaction. The scale up of SPF process showed a good reproducibility. Oxalic and oxamic acids were identified as the main low-molecular-weight carboxylic acids detected during the pilot-scale SPF reaction. Graphical abstract ᅟ.
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Affiliation(s)
- Bianca M Souza
- LSRE-Laboratory of Separation and Reaction Engineering-Associate Laboratory LSRE/LCM, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
- Chemical Engineering Program-COPPE, Federal University of Rio de Janeiro, P.O. Box 68502, 21941-972, Rio de Janeiro, RJ, Brazil
| | - Belisa A Marinho
- LSRE-Laboratory of Separation and Reaction Engineering-Associate Laboratory LSRE/LCM, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Francisca C Moreira
- LSRE-Laboratory of Separation and Reaction Engineering-Associate Laboratory LSRE/LCM, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Márcia W C Dezotti
- Chemical Engineering Program-COPPE, Federal University of Rio de Janeiro, P.O. Box 68502, 21941-972, Rio de Janeiro, RJ, Brazil
| | - Rui A R Boaventura
- LSRE-Laboratory of Separation and Reaction Engineering-Associate Laboratory LSRE/LCM, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Vítor J P Vilar
- LSRE-Laboratory of Separation and Reaction Engineering-Associate Laboratory LSRE/LCM, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.
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56
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Čizmić M, Ljubas D, Ćurković L, Škorić I, Babić S. Kinetics and degradation pathways of photolytic and photocatalytic oxidation of the anthelmintic drug praziquantel. JOURNAL OF HAZARDOUS MATERIALS 2017; 323:500-512. [PMID: 27174626 DOI: 10.1016/j.jhazmat.2016.04.065] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 04/13/2016] [Accepted: 04/26/2016] [Indexed: 06/05/2023]
Abstract
In this study, an anthelmintic drug, praziquantel(PZQ), was degraded using the direct photolysis, photocatalysis, and oxidation processes including UV radiation, TiO2 film, and hydrogen peroxide. The photolytic degradation with predominant wavelengths of 185/254nm (UV-C) proved to be more efficient with a half-life of 3.13min compared to the radiation of 365nm (UV-A) where the degradation did not occur. In order to enhance the rate of PZQ photolytic degradation, H2O2 was added, which resulted in two to three times higher degradation rates. In the photocatalytic degradation, TiO2 film was used as catalyst. The degradation was ten times faster in the photocatalytic experiments where UV-C light (k=0.2390min-1) was used than in those with UV-A (k=0.0201min-1). Comparing the results from all performed experiments it can be concluded that the UV-C/TiO2/H2O2 process yielded the highest degradation rate and complete degradation of PZQ was obtained in less than 7min. The degradation of PZQ followed the first order kinetics in all the experiments. The photo degradation was inhibited in the presence of methanol. The degradation pathways and the structural formulae of five degradation products (m/z 273, 269, 189, 147, 132) were proposed based on the liquid chromatography tandem mass spectrometry analysis.
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Affiliation(s)
- Mirta Čizmić
- Department of Analytical Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Croatia.
| | - Davor Ljubas
- Department of Energy, Power Engineering and Environment, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Croatia.
| | - Lidija Ćurković
- Department of Materials, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Croatia
| | - Irena Škorić
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Croatia
| | - Sandra Babić
- Department of Analytical Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Croatia
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57
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de la Obra I, Esteban García B, García Sánchez JL, Casas López JL, Sánchez Pérez JA. Low cost UVA-LED as a radiation source for the photo-Fenton process: a new approach for micropollutant removal from urban wastewater. Photochem Photobiol Sci 2017; 16:72-78. [DOI: 10.1039/c6pp00245e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A UVA-LED driven photo-Fenton process is shown as a feasible technology for micropollutant removal. The photoreactor design, which strongly depends on the energy efficiency and LED wavelength, needs to be carried out using parameters such as Electrical-Energy-per-Order (EEO).
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Affiliation(s)
- I. de la Obra
- Solar Energy Research Centre CIESOL
- Almería
- Spain
- Chemical Engineering Department
- University of Almería
| | - B. Esteban García
- Solar Energy Research Centre CIESOL
- Almería
- Spain
- Chemical Engineering Department
- University of Almería
| | - J. L. García Sánchez
- Solar Energy Research Centre CIESOL
- Almería
- Spain
- Chemical Engineering Department
- University of Almería
| | - J. L. Casas López
- Solar Energy Research Centre CIESOL
- Almería
- Spain
- Chemical Engineering Department
- University of Almería
| | - J. A. Sánchez Pérez
- Solar Energy Research Centre CIESOL
- Almería
- Spain
- Chemical Engineering Department
- University of Almería
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58
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Laohaprapanon S, Vanderlipe AD, Doma Jr BT, You SJ. Self-cleaning and antifouling properties of plasma-grafted poly(vinylidene fluoride) membrane coated with ZnO for water treatment. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2016.10.019] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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59
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Barbosa MO, Moreira NFF, Ribeiro AR, Pereira MFR, Silva AMT. Occurrence and removal of organic micropollutants: An overview of the watch list of EU Decision 2015/495. WATER RESEARCH 2016; 94:257-279. [PMID: 26967909 DOI: 10.1016/j.watres.2016.02.047] [Citation(s) in RCA: 408] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Revised: 02/18/2016] [Accepted: 02/19/2016] [Indexed: 05/18/2023]
Abstract
Although there are no legal discharge limits for micropollutants into the environment, some regulations have been published in the last few years. Recently, a watch list of substances for European Union-wide monitoring was reported in the Decision 2015/495/EU of 20 March 2015. Besides the substances previously recommended to be included by the Directive 39/2013/EU, namely two pharmaceuticals (diclofenac and the synthetic hormone 17-alpha-ethinylestradiol (EE2)) and a natural hormone (17-beta-estradiol (E2)), the first watch list of 10 substances/groups of substances also refers three macrolide antibiotics (azithromycin, clarithromycin and erythromycin), other natural hormone (estrone (E1)), some pesticides (methiocarb, oxadiazon, imidacloprid, thiacloprid, thiamethoxam, clothianidin, acetamiprid and triallate), a UV filter (2-ethylhexyl-4-methoxycinnamate) and an antioxidant (2,6-di-tert-butyl-4-methylphenol) commonly used as food additive. Since little is known about the removal of most of the substances included in the Decision 2015/495/EU, particularly regarding realistic concentrations in aqueous environmental samples, this review aims to: (i) overview the European policy in the water field; (ii) briefly describe the most commonly used conventional and advanced treatment processes to remove micropollutants; (iii) summarize the relevant data published in the last decade, regarding occurrence and removal in aqueous matrices of the 10 substances/groups of substances that were recently included in the first watch list for European Union monitoring (Decision 2015/495/EU); and (iv) highlight the lack of reports concerning some substances of the watch list, the study of un-spiked aquatic matrices and the assessment of transformation by-products.
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Affiliation(s)
- Marta O Barbosa
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Nuno F F Moreira
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Ana R Ribeiro
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Manuel F R Pereira
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Adrián M T Silva
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
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60
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Cesaro A, Belgiorno V. Removal of Endocrine Disruptors from Urban Wastewater by Advanced Oxidation Processes (AOPs): A Review. ACTA ACUST UNITED AC 2016. [DOI: 10.2174/1874070701610010151] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Over the last years the growing presence of endocrine disrupting compounds in the environment has been regarded as a serious sanitary issue. The more and more frequent detection of these compounds in the effluents of wastewater treatment plants poses the risk associated to their persistence into the aquatic systems as well as to their adverse effects on both public health and environment.
As conventional systems do not allow their efficient removal, great attention has been raised towards their possible treatment by Advanced Oxidation Processes (AOPs). They rely on the action of hydroxyl radicals, which are highly reactive species, able to oxidize recalcitrant and non-biodegradable pollutants.
AOPs can either provide contaminant partial degradation or their complete removal. As their effectiveness has been proved for a wide spectrum of both organic and inorganic pollutants, they are considered a suitable option for the treatment of contaminated aqueous media, especially when combined with conventional biological processes.
This paper aims at reviewing main AOPs for the removal of endocrine disruptors, in order to highlight the most important features of different technologies, thus providing their comparative assessment. To this end, a brief overview of the most frequently detected endocrine disruptor compounds was also discussed, in order to clarify their fate into the environment as well as the contamination pathways of greatest concern for human health.
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61
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Lyu S, Chen W, Zhang W, Fan Y, Jiao W. Wastewater reclamation and reuse in China: Opportunities and challenges. J Environ Sci (China) 2016; 39:86-96. [PMID: 26899648 DOI: 10.1016/j.jes.2015.11.012] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 11/26/2015] [Accepted: 11/27/2015] [Indexed: 06/05/2023]
Abstract
The growing water stress both in terms of water scarcity and quality deterioration promotes the development of reclaimed water as a new water resource use. This paper reviewed wastewater reuse practices in China, and the opportunities and challenges of expanding reclaimed water use were analyzed. Rapid urbanization with the increasing of water demand and wastewater discharge provides an opportunity for wastewater reuse. The vast amount of wastewater discharge and low reclaimed water production mean that wastewater reuse still has a great potential in China. Many environmental and economic benefits and successful reclamation technologies also provide opportunities for wastewater reuse. In addition, the overall strategy in China is also encouraging for wastewater reuse. In the beginning stage of wastewater reclamation and reuse, there are many significant challenges to expand wastewater reuse in China including slow pace in adopting urban wastewater reuse programs, the establishment of integrated water resources management framework and guidelines for wastewater reuse programs, incoherent water quality requirements, the limited commercial development of reclaimed water and the strengthening of public awareness and cooperation among stakeholders.
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Affiliation(s)
- Sidan Lyu
- State Key Laboratory for Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Weiping Chen
- State Key Laboratory for Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Weiling Zhang
- State Key Laboratory for Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yupeng Fan
- State Key Laboratory for Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Wentao Jiao
- State Key Laboratory for Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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62
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Fenoll J, Garrido I, Hellín P, Flores P, Navarro S. Photodegradation of neonicotinoid insecticides in water by semiconductor oxides. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:15055-15066. [PMID: 26002372 DOI: 10.1007/s11356-015-4721-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 05/13/2015] [Indexed: 06/04/2023]
Abstract
The photocatalytic degradation of three neonicotinoid insecticides (NIs), thiamethoxam (TH), imidacloprid (IM) and acetamiprid (AC), in pure water has been studied using zinc oxide (ZnO) and titanium dioxide (TiO2) as photocatalysts under natural sunlight and artificial light irradiation. Photocatalytic experiments showed that the addition of these chalcogenide oxides in tandem with the electron acceptor (Na2S2O8) strongly enhances the degradation rate of these compounds in comparison with those carried out with ZnO and TiO2 alone and photolytic tests. Comparison of catalysts showed that ZnO is the most efficient for the removal of such insecticides in optimal conditions and at constant volumetric rate of photon absorption. Thus, the complete disappearance of all the studied compounds was achieved after 10 and 30 min of artificial light irradiation, in the ZnO/Na2S2O8 and TiO2/Na2S2O8 systems, respectively. The highest degradation rate was noticed for IM, while the lowest rate constant was obtained for AC under artificial light irradiation. In addition, solar irradiation was more efficient compared to artificial light for the removal of these insecticides from water. The main photocatalytic intermediates detected during the degradation of NIs were identified.
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Affiliation(s)
- José Fenoll
- Departamento de Calidad y Garantía Alimentaria, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), C/ Mayor s/n. La Alberca, 30150, Murcia, Spain.
| | - Isabel Garrido
- Departamento de Calidad y Garantía Alimentaria, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), C/ Mayor s/n. La Alberca, 30150, Murcia, Spain
| | - Pilar Hellín
- Departamento de Calidad y Garantía Alimentaria, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), C/ Mayor s/n. La Alberca, 30150, Murcia, Spain
| | - Pilar Flores
- Departamento de Calidad y Garantía Alimentaria, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), C/ Mayor s/n. La Alberca, 30150, Murcia, Spain
| | - Simón Navarro
- Departamento de Química Agrícola, Geología y Edafología, Facultad de Química, Universidad de Murcia, Campus Universitario de Espinardo, 30100, Murcia, Spain
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63
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Gomis J, Carlos L, Prevot AB, Teixeira A, Mora M, Amat A, Vicente R, Arques A. Bio-based substances from urban waste as auxiliaries for solar photo-Fenton treatment under mild conditions: Optimization of operational variables. Catal Today 2015. [DOI: 10.1016/j.cattod.2014.03.034] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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64
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UV and solar-based photocatalytic degradation of organic pollutants by nano-sized TiO2 grown on carbon nanotubes. Catal Today 2015. [DOI: 10.1016/j.cattod.2014.04.021] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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65
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Yu L, Wang D, Ye D. Solar photocatalytic ozonation of emerging contaminants detected in municipal wastewater treatment plant effluents by magnetic MWCNTs/TiO2 nanocomposites. RSC Adv 2015. [DOI: 10.1039/c5ra18752d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Magnetically separable catalysts with high solar photocatalytic ozonation activity were successfully synthesized.
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Affiliation(s)
- Lian Yu
- College of Environment and Energy
- South China University of Technology
- Guangzhou 510006
- China
| | - Dongsheng Wang
- State Key Laboratory of Environmental Aquatic Chemistry
- Research Center for Eco-Environmental Sciences
- Chinese Academy of Sciences
- Beijing 100085
- China
| | - Daiqi Ye
- College of Environment and Energy
- South China University of Technology
- Guangzhou 510006
- China
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66
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Van Doorslaer X, Dewulf J, Van Langenhove H, Demeestere K. Fluoroquinolone antibiotics: an emerging class of environmental micropollutants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 500-501:250-69. [PMID: 25226071 DOI: 10.1016/j.scitotenv.2014.08.075] [Citation(s) in RCA: 377] [Impact Index Per Article: 37.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 08/21/2014] [Accepted: 08/21/2014] [Indexed: 05/21/2023]
Abstract
The aim of this review paper is to provide a comprehensive overview of different chemical and environmental aspects concerning fluoroquinolone antibiotics as emerging contaminants. A literature survey has been performed based on 204 papers from 1998 to mid-2013, resulting in a dataset consisting out of 4100 data points related to physical-chemical properties, environmental occurrence, removal efficiencies, and ecotoxicological data. In a first part, an overview is given on relevant physical-chemical parameters to better understand the behavior of fluoroquinolones during wastewater treatment and in the environment. Secondly, the route of these antibiotics after their application in both human and veterinary surroundings is discussed. Thirdly, the occurrence of fluoroquinolone residues is discussed for different environmental matrices. The final part of this review provides a tentative risk assessment of fluoroquinolone compounds and their transformation products in surface waters by means of hazard quotients. Overall, this review shows that fluoroquinolone antibiotics have a wide spread use and that their behavior during wastewater treatment is complex with an incomplete removal. As a result, it is observed that these biorecalcitrant compounds are present in different environmental matrices at potentially hazardous concentrations for the aquatic environment. The latter calls for actions on both the consumption as well as the wastewater treatment aspect to diminish the discharge of these biological active compounds.
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Affiliation(s)
- Xander Van Doorslaer
- Research Group EnVOC, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Jo Dewulf
- Research Group EnVOC, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Herman Van Langenhove
- Research Group EnVOC, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Kristof Demeestere
- Research Group EnVOC, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
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67
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Ortega-Gómez E, Esteban García B, Ballesteros Martín MM, Fernández Ibáñez P, Sánchez Pérez JA. Inactivation of natural enteric bacteria in real municipal wastewater by solar photo-Fenton at neutral pH. WATER RESEARCH 2014; 63:316-324. [PMID: 25078303 DOI: 10.1016/j.watres.2014.05.034] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 05/13/2014] [Accepted: 05/19/2014] [Indexed: 06/03/2023]
Abstract
This study analyses the use of the solar photo-Fenton treatment in compound parabolic collector photo-reactors at neutral pH for the inactivation of wild enteric Escherichia coli and total coliform present in secondary effluents of a municipal wastewater treatment plant (SEWWTP). Control experiments were carried out to find out the individual effects of mechanical stress, pH, reactants concentration, and UVA radiation as well as the combined effects of UVA-Fe and UVA-H2O2. The synergistic germicidal effect of solar-UVA with 50 mg L(-1) of H2O2 led to complete disinfection (up to the detection limit) of total coliforms within 120 min. The disinfection process was accelerated by photo-Fenton, achieving total inactivation in 60 min reducing natural bicarbonate concentration found in the SEWWTP from 250 to 100 mg L(-1) did not give rise to a significant enhancement in bacterial inactivation. Additionally, the effect of hydrogen peroxide and iron dosage was evaluated. The best conditions were 50 mg L(-1) of H2O2 and 20 mg L(-1) of Fe(2+). Due to the variability of the SEWWTP during autumn and winter seasons, the inactivation kinetic constant varied between 0.07 ± 0.04 and 0.17 ± 0.04 min(-1). Moreover, the water treated by solar photo-Fenton fulfilled the microbiological quality requirement for wastewater reuse in irrigation as per the WHO guidelines and in particular for Spanish legislation.
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Affiliation(s)
- E Ortega-Gómez
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; CIESOL, Joint Centre of the University of Almería-CIEMAT, 04120 Almería, Spain
| | - B Esteban García
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; CIESOL, Joint Centre of the University of Almería-CIEMAT, 04120 Almería, Spain
| | - M M Ballesteros Martín
- CIESOL, Joint Centre of the University of Almería-CIEMAT, 04120 Almería, Spain; Department of Molecular Biology and Biochemical Engineering, University of Pablo de Olavide, 41013 Sevilla, Spain
| | - P Fernández Ibáñez
- CIESOL, Joint Centre of the University of Almería-CIEMAT, 04120 Almería, Spain; Plataforma Solar de Almería, CIEMAT, 04200 Tabernas, Almería, Spain
| | - J A Sánchez Pérez
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; CIESOL, Joint Centre of the University of Almería-CIEMAT, 04120 Almería, Spain.
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68
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Li L, Wang L, Hu T, Zhang W, Zhang X, Chen X. Preparation of highly photocatalytic active CdS/TiO2 nanocomposites by combining chemical bath deposition and microwave-assisted hydrothermal synthesis. J SOLID STATE CHEM 2014. [DOI: 10.1016/j.jssc.2014.06.027] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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69
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Identification and monitoring of thiabendazole transformation products in water during Fenton degradation by LC-QTOF-MS. Anal Bioanal Chem 2014; 406:5323-37. [DOI: 10.1007/s00216-014-7942-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 05/21/2014] [Accepted: 06/03/2014] [Indexed: 10/25/2022]
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70
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Sánchez Peréz JA, Carra I, Sirtori C, Agüera A, Esteban B. Fate of thiabendazole through the treatment of a simulated agro-food industrial effluent by combined MBR/Fenton processes at μg/L scale. WATER RESEARCH 2014; 51:55-63. [PMID: 24388831 DOI: 10.1016/j.watres.2013.07.039] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 07/22/2013] [Accepted: 07/24/2013] [Indexed: 06/03/2023]
Abstract
This study has been carried out to assess the performance of a combined system consisting of a membrane bioreactor (MBR) followed by an advanced oxidation process (Fenton/Photo-Fenton) for removing the fungicide thiabendazole (TBZ) in a simulated agro-food industrial wastewater. Previous studies have shown the presence of TBZ in the effluent of an agro-food industry treated by activated sludge in a sequencing batch reactor (SBR), thus reinforcing the need for alternative treatments for removal. In this study, a simulated agro-food industry effluent was enriched with 100 μg L(-1) TBZ and treated by combined MBR/Fenton and MBR/solar photo-Fenton systems. Samples were directly injected into a highly sensitive liquid chromatography-triple quadrupole-linear ion trap-mass spectrometer (LC-QqLiT-MS/MS) analytical system to monitor the degradation of TBZ even at low concentration levels (ng L(-1)). Results showed that the biological treatment applied was not effective in TBZ degradation, which remained almost unaltered; although most dissolved organic matter was biodegraded effectively. Fenton and solar photo-Fenton, were assayed as tertiary treatments. The experiments were run without any pH adjustment by using an iron dosage strategy in the presence of excess hydrogen peroxide. Both treatments resulted in a total degradation of TBZ, obtaining more than 99% removal in both cases. To assure the total elimination of contaminants in the treated waters, transformation products (TPs) of TBZ generated during Fenton degradation experiments were identified and monitored by liquid chromatography-quadrupole time-of-flight mass spectrometry (LC-QTOF-MS/MS). Up to four TPs could be identified. Two of them corresponded to mono-hydroxylated derivatives, typically generated under hydroxyl radicals driven processes. The other two corresponded with the hydrolysis of the TBZ molecule to yield benzoimidazole and thiazole-4-carboxamidine. All of them were also degraded during the treatment.
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Affiliation(s)
- J A Sánchez Peréz
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; CIESOL, Joint Centre of the University of Almería-CIEMAT, 04120 Almería, Spain
| | - I Carra
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; CIESOL, Joint Centre of the University of Almería-CIEMAT, 04120 Almería, Spain
| | - C Sirtori
- Universidade Federal da Integração Latino-Americana (UNILA), PO Box 2044, CEP 85867-970 Foz do Iguaçu, PR, Brazil
| | - A Agüera
- CIESOL, Joint Centre of the University of Almería-CIEMAT, 04120 Almería, Spain; Department of Chemistry and Physics, University of Almería, 04120 Almería, Spain
| | - B Esteban
- Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; CIESOL, Joint Centre of the University of Almería-CIEMAT, 04120 Almería, Spain.
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71
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Arany E, Láng J, Somogyvári D, Láng O, Alapi T, Ilisz I, Gajda-Schrantz K, Dombi A, Kőhidai L, Hernádi K. Vacuum ultraviolet photolysis of diclofenac and the effects of its treated aqueous solutions on the proliferation and migratory responses of Tetrahymena pyriformis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 468-469:996-1006. [PMID: 24091123 DOI: 10.1016/j.scitotenv.2013.09.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 09/06/2013] [Accepted: 09/06/2013] [Indexed: 06/02/2023]
Abstract
The effects of dissolved O2, phosphate buffer and the initial concentration of diclofenac on the vacuum ultraviolet photolysis of this contaminant molecule were studied. Besides kinetic measurements, the irradiated, multicomponent samples were characterized via the proliferation and migratory responses (in sublethal concentrations) of the bioindicator eukaryotic ciliate Tetrahymena pyriformis. The results suggest that hydroxyl radicals, hydrogen atoms and hydroperoxyl radicals may all contribute to the degradation of diclofenac. The aromatic by-products of diclofenac were presumed to include a hydroxylated derivative, 1-(8-chlorocarbazolyl)acetic acid and 1-(8-hydroxycarbazolyl)acetic acid. The biological activity of photoexposed samples reflected the chemical transformation of diclofenac and was also dependent on the level of dissolved O2. The increase in toxicity of samples taken after different irradiation times did not exceed a factor of two. Our results suggest that the combination of vacuum ultraviolet photolysis with toxicity and chemotactic measurements can be a valuable method for the investigation of the elimination of micropollutants.
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Affiliation(s)
- Eszter Arany
- Research Group of Environmental Chemistry, Institute of Chemistry, University of Szeged, H-6720 Szeged, Rerrich Béla tér 1, Hungary
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72
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Indermuhle C, Martín de Vidales MJ, Sáez C, Robles J, Cañizares P, García-Reyes JF, Molina-Díaz A, Comninellis C, Rodrigo MA. Degradation of caffeine by conductive diamond electrochemical oxidation. CHEMOSPHERE 2013; 93:1720-1725. [PMID: 23769468 DOI: 10.1016/j.chemosphere.2013.05.047] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 05/19/2013] [Accepted: 05/21/2013] [Indexed: 06/02/2023]
Abstract
The use of Conductive-Diamond Electrochemical Oxidation (CDEO) and Sonoelectrochemical Oxidation (CDSEO) has been evaluated for the removal of caffeine of wastewater. Effects of initial concentration, current density and supporting electrolyte on the process efficiency are assessed. Results show that caffeine is very efficiently removed with CDEO and that depletion of caffeine has two stages depending on its concentration. At low concentrations, opposite to what it is expected in a mass-transfer controlled process, the efficiency increases with current density very significantly, suggesting a very important role of mediated oxidation processes on the removal of caffeine. In addition, the removal of caffeine is faster than TOC, indicating the formation of reaction intermediates. The number and relative abundance of them depend on the operating conditions and supporting electrolyte used. In chloride media, removal of caffeine is faster and more efficiently, although the occurrence of more intermediates takes place. CDSEO does not increase the efficiency of caffeine removal, but it affects to the formation of intermediates. A detailed characterization of intermediates by liquid chromatography time-of-flight mass spectrometry seems to indicate that the degradation of caffeine by CDEO follows an oxidation pathway similar to mechanism proposed by other advanced oxidation processes.
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Affiliation(s)
- Chloe Indermuhle
- Electrochemical Engineering Group, Chemical Engineering and Biochemistry Section, School of Basis Sciences, CHJ2 483, Station 6, CH-1015 Lausanne, Switzerland
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73
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Xiong P, Wang L, Sun X, Xu B, Wang X. Ternary Titania–Cobalt Ferrite–Polyaniline Nanocomposite: A Magnetically Recyclable Hybrid for Adsorption and Photodegradation of Dyes under Visible Light. Ind Eng Chem Res 2013. [DOI: 10.1021/ie400739e] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Pan Xiong
- Key Laboratory for Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Ministry
of Education, Nanjing 210094, China
- Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Lianjun Wang
- Key Laboratory of Jiangsu Province for Chemical Pollution Control
and Resources Reuse, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Xiaoqiang Sun
- Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Binhai, Xu
- Jiangsu Hehai Nanometer Science & Technology Co., Ltd, Taixing 225401, China
| | - Xin Wang
- Key Laboratory for Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Ministry
of Education, Nanjing 210094, China
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74
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Solar photo-Fenton optimization for the treatment of MWTP effluents containing emerging contaminants. Catal Today 2013. [DOI: 10.1016/j.cattod.2013.01.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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75
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De la Cruz N, Romero V, Dantas RF, Marco P, Bayarri B, Giménez J, Esplugas S. o-Nitrobenzaldehyde actinometry in the presence of suspended TiO2 for photocatalytic reactors. Catal Today 2013. [DOI: 10.1016/j.cattod.2012.08.035] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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76
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Marques RR, Sampaio MJ, Carrapiço PM, Silva CG, Morales-Torres S, Dražić G, Faria JL, Silva AM. Photocatalytic degradation of caffeine: Developing solutions for emerging pollutants. Catal Today 2013. [DOI: 10.1016/j.cattod.2012.10.008] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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77
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Barndõk H, Peláez M, Han C, Platten WE, Campo P, Hermosilla D, Blanco A, Dionysiou DD. Photocatalytic degradation of contaminants of concern with composite NF-TiO2 films under visible and solar light. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:3582-3591. [PMID: 23436122 DOI: 10.1007/s11356-013-1550-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Accepted: 02/04/2013] [Indexed: 06/01/2023]
Abstract
This study reports the synthesis and characterization of composite nitrogen and fluorine co-doped titanium dioxide (NF-TiO(2)) for the removal of contaminants of concern in wastewater under visible and solar light. Monodisperse anatase TiO(2) nanoparticles of different sizes and Evonik P25 were assembled to immobilized NF-TiO(2) by direct incorporation into the sol-gel or by the layer-by-layer technique. The composite films were characterized with X-ray diffraction, high-resolution transmission electron microscopy, environmental scanning electron microscopy, and porosimetry analysis. The photocatalytic degradation of atrazine, carbamazepine, and caffeine was evaluated in a synthetic water solution and in an effluent from a hybrid biological concentrator reactor (BCR). Minor aggregation and improved distribution of monodisperse titania particles was obtained with NF-TiO(2)-monodisperse (10 and 50 nm) from the layer-by-layer technique than with NF-TiO(2) +monodisperse TiO(2) (300 nm) directly incorporated into the sol. The photocatalysts synthesized with the layer-by-layer method achieved significantly higher degradation rates in contrast with NF-TiO(2)-monodisperse titania (300 nm) and slightly faster values when compared with NF-TiO(2)-P25. Using NF-TiO(2) layer-by-layer with monodisperse TiO(2) (50 nm) under solar light irradiation, the respective degradation rates in synthetic water and BCR effluent were 14.6 and 9.5 × 10(-3) min(-1) for caffeine, 12.5 and 9.0 × 10(-3) min(-1) for carbamazepine, and 10.9 and 5.8 × 10(-3) min(-1) for atrazine. These results suggest that the layer-by-layer technique is a promising method for the synthesis of composite TiO(2)-based films compared to the direct addition of nanoparticles into the sol.
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Affiliation(s)
- H Barndõk
- Department of Chemical Engineering, Complutense University of Madrid, Avda. Complutense, s/n, 28040, Madrid, Spain.
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78
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Adsorption backup following light-emitting diode-irradiated photocatalytic unit for control of low-degraded toxic gaseous compounds. KOREAN J CHEM ENG 2012. [DOI: 10.1007/s11814-012-0167-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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79
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Alturki A, McDonald J, Khan SJ, Hai FI, Price WE, Nghiem LD. Performance of a novel osmotic membrane bioreactor (OMBR) system: flux stability and removal of trace organics. BIORESOURCE TECHNOLOGY 2012; 113:201-206. [PMID: 22342586 DOI: 10.1016/j.biortech.2012.01.082] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 01/16/2012] [Accepted: 01/17/2012] [Indexed: 05/31/2023]
Abstract
Results reported here highlight the potential and several challenges in the development of a novel osmotic membrane bioreactor (OMBR) process for the treatment of municipal wastewater. Following the initial gradual decline, a stable permeate flux value was obtained after approximately four days of continuous operation. There was evidence of continuous deterioration of biological activity of the OMBR system, possibly due to the build-up of salinity in the reactor. The removal of 25 out of 27 trace organic compounds with molecular weight higher than 266 g/mol was above 80% and was possibly governed by the interplay between physical separation of the FO membrane and biodegradation. In contrast, the removal efficiency values of the other 23 trace organic compounds with molecular weight less than 266 g/mol were very scattered. The removal efficiency of these low molecular weight compounds by OMBR treatment appears to depend mostly on biological degradation.
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Affiliation(s)
- Abdulhakeem Alturki
- Strategic Water Infrastructure Laboratory, School of Civil Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
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80
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Robertson PKJ, Robertson JMC, Bahnemann DW. Removal of microorganisms and their chemical metabolites from water using semiconductor photocatalysis. JOURNAL OF HAZARDOUS MATERIALS 2012; 211-212:161-171. [PMID: 22178373 DOI: 10.1016/j.jhazmat.2011.11.058] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Revised: 11/16/2011] [Accepted: 11/17/2011] [Indexed: 05/27/2023]
Abstract
Semiconductor photocatalysis has been applied to the remediation of an extensive range of chemical pollutants in water over the past 30 years. The application of this versatile technology for removal of micro-organisms and cyanotoxins has recently become an area that has also been the subject of extensive research particularly over the past decade. This paper considers recent research in the application of semiconductor photocatalysis for the treatment of water contaminated with pathogenic micro-organisms and cyanotoxins. The basic processes involved in photocatalysis are described and examples of recent research into the use of photocatalysis for the removal of a range of microorganisms are detailed. The paper concludes with a review of the key research on the application of this process for the removal of chemical metabolites generated from cyanobacteria.
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Affiliation(s)
- Peter K J Robertson
- IDeaS, Innovation, Design and Sustainability Research Institute, Robert Gordon University, Schoolhill, Aberdeen, AB10 1FR, UK.
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