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Liu X, Peng X, Wang A, Yang C, Cheng Y, Wang J, Wu Y, Ju C. Preparation of TiO2/CX composite photoanode and its breathing-like mode photoelectrocatalytic degradation of solubilized PHE in soil washing effluent. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
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2
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Mohadesi M, Gouran A, Seifi K. Removal of ibuprofen from synthetic wastewater using photocatalytic method in the presence of FeO photocatalyst supported on modified Iranian clinoptilolite. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:34338-34348. [PMID: 35038093 DOI: 10.1007/s11356-021-18153-3] [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: 06/11/2021] [Accepted: 12/13/2021] [Indexed: 06/14/2023]
Abstract
This study investigated the removal of an organic drug called ibuprofen from the wastewater containing this drug. Iron oxide supported on modified Iranian clinoptilolite was used as the photocatalyst in the presence of the light of a solar lamp. XRD, SEM, EDAX, and FT-IR analyses were performed to detect the prepared photocatalyst. The results of photocatalytic identification analyses proved the suitable loading of iron oxide supported on modified Iranian clinoptilolite. This study investigated the effect of initial concentration of ibuprofen (5-25 mg/L), photocatalyst concentration (100-300 mg/L), and process time (10-240 min) on the removal from ibuprofen from wastewater containing this drug. The experiments were performed in a setup in the presence of a solar lamp with a flux of 300 W/m2. The results indicated that with the initial ibuprofen concentration of 25 mg/L, photocatalyst concentration of 300 mg/L, and time of 210 min, the highest percentage of ibuprofen removal and ibuprofen adsorbed on the catalyst were 99.80% and 83.17 mg/g, respectively. Kinetic modeling was then performed using the Langmuir-Hinshelwood model, and a quasi-first-order kinetic model showed a good agreement with the results obtained. Finally, the recovery of the photocatalyst was investigated, and the results showed that under optimal conditions about 91% of ibuprofen was removed after five re-uses of the photocatalyst.
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Affiliation(s)
- Majid Mohadesi
- Department of Chemical Engineering, Faculty of Engineering, Kermanshah University of Technology, Kermanshah, Iran.
| | - Ashkan Gouran
- Department of Chemical Engineering, Faculty of Engineering, Kermanshah University of Technology, Kermanshah, Iran
| | - Kiarash Seifi
- Department of Chemical Engineering, Faculty of Engineering, Kermanshah University of Technology, Kermanshah, Iran
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3
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Trellu C, Pechaud Y, Oturan N, Mousset E, van Hullebusch ED, Huguenot D, Oturan MA. Remediation of soils contaminated by hydrophobic organic compounds: How to recover extracting agents from soil washing solutions? JOURNAL OF HAZARDOUS MATERIALS 2021; 404:124137. [PMID: 33049627 DOI: 10.1016/j.jhazmat.2020.124137] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 09/07/2020] [Accepted: 09/27/2020] [Indexed: 06/11/2023]
Abstract
A lot of soil (particularly, former industrial and military sites) has been contaminated by various highly toxic contaminants such as petroleum hydrocarbons, polycyclic aromatic hydrocarbons (PAHs), polychlorobiphenyls (PCBs) or chlorinated solvents. Soil remediation is now required for their promotion into new industrial or real estate activities. Therefore, the soil washing (SW) process enhanced by the use of extracting agents (EAs) such as surfactants or cyclodextrins (CDs) has been developed for the removal of hydrophobic organic compounds (HOCs) from contaminated soils. The use of extracting agents allows improving the transfer of HOCs from the soil-sorbed fraction to the washing solution. However, using large amount of extracting agents is also a critical drawback for cost-effectiveness of the SW process. The aim of this review is to examine how extracting agents might be recovered from SW solutions for reuse. Various separation processes are able to recover large amounts of extracting agents according to the physicochemical characteristics of target pollutants and extracting agents. However, an additional treatment step is required for the degradation of recovered pollutants. SW solutions may also undergo degradation processes such as advanced oxidation processes (AOPs) with in situ production of oxidants. Partial recovery of extracting agents can be achieved according to operating conditions and reaction kinetics between organic compounds and oxidant species. The suitability of each process is discussed according to the various physicochemical characteristics of SW solutions. A particular attention is paid to the anodic oxidation process, which allows either a selective degradation of the target pollutants or a complete removal of the organic load depending on the operating conditions.
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Affiliation(s)
- Clément Trellu
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France.
| | - Yoan Pechaud
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France
| | - Nihal Oturan
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France
| | - Emmanuel Mousset
- Laboratoire Réactions et Génie des Procédés, Université de Lorraine, CNRS, LRGP, F-54000 Nancy, France
| | - Eric D van Hullebusch
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France
| | - David Huguenot
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France
| | - Mehmet A Oturan
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France.
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4
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Wang A, Peng X, Shi N, Lu X, Yang C, He P, Wu Y. Study on the preparation of the hierarchical porous CX-TiO 2 composites and their selective degradation of PHE solubilized in soil washing eluent. CHEMOSPHERE 2020; 260:127588. [PMID: 32683010 DOI: 10.1016/j.chemosphere.2020.127588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 06/26/2020] [Accepted: 07/01/2020] [Indexed: 06/11/2023]
Abstract
A series of CX-TiO2(Carbon Xerogel- TiO2) composites with a hierarchical porous structure were obtained through the sol-gel method followed by drying and carbonization, and have been applied to treating solubilizing wastewater containing a high concentration of phenanthrene (PHE). The characterizations demonstrated that the CX-TiO2 exhibits a hierarchical porous structure, with particles of carbon and P25 being uniformly in the matrix. Removal efficiency of CX-TiO2 on PHE in soil washing eluent (SWE) were evaluated under ultraviolet (UV) irradiation or dark condition, and P25 was employed as the reference. The results revealed that CX-TiO2(0.2) had the best removal effect on PHE, with the efficiency as high as 97.8% under UV illumination within 15 h. It demonstrated that in the process of PHE removal by CX-TiO2 whether it was under UV illumination or not, the adsorption plays a dominant role in the early stage. The kinetic behavior of PHE adsorption was fitted using the pseudo-first-order and pseudo-second-order, and Langmuir model and Freundlich models were applied to describe the PHE adsorption isotherms. The results indicating that it was a chemical adsorption process, which was influenced by the interaction between PHE and CX-TiO2, and PHE is adsorbed on the interface of CX-TiO2(0.2) in a single layer form, instead of agglomerating in the admicelle. A possible mechanism of removal of solubilized PHE in SWE was speculated, in which both hierarchical porous structure and appropriate micropores size of CX-TiO2 were indispensable to the selective adsorption and degradation of PHE. Recycling performance certificated that the selective removal efficiency of PHE could still reach 82.09% after five recycles. Thus the excellent performance testified that the CX-TiO2 have great potential in treating SWE containing solubilized PAHs.
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Affiliation(s)
- Aijing Wang
- College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, No. 29 13th Avenue, Economic and Technologic Development Zone, Tianjin, 300457, PR China.
| | - Xiao Peng
- College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, No. 29 13th Avenue, Economic and Technologic Development Zone, Tianjin, 300457, PR China.
| | - Ning Shi
- College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, No. 29 13th Avenue, Economic and Technologic Development Zone, Tianjin, 300457, PR China.
| | - Xiaohui Lu
- College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, No. 29 13th Avenue, Economic and Technologic Development Zone, Tianjin, 300457, PR China.
| | - Chunlei Yang
- College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, No. 29 13th Avenue, Economic and Technologic Development Zone, Tianjin, 300457, PR China.
| | - Ping He
- College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, No. 29 13th Avenue, Economic and Technologic Development Zone, Tianjin, 300457, PR China.
| | - Yan Wu
- College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, No. 29 13th Avenue, Economic and Technologic Development Zone, Tianjin, 300457, PR China.
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5
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Long M, Ilhan ZE, Xia S, Zhou C, Rittmann BE. Complete dechlorination and mineralization of pentachlorophenol (PCP) in a hydrogen-based membrane biofilm reactor (MBfR). WATER RESEARCH 2018; 144:134-144. [PMID: 30025265 DOI: 10.1016/j.watres.2018.06.071] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 06/29/2018] [Accepted: 06/29/2018] [Indexed: 06/08/2023]
Abstract
Complete biodegradation and mineralization of pentachlorophenol (PCP), a priority pollutant in water, is challenging for water treatment. In this study, a hydrogen (H2)-based membrane biofilm reactor (MBfR) was applied to treat PCP, along with nitrate and sulfate, which often coexist in contaminated groundwater. Throughout 120-days of continuous operation, almost 100% of up to 10 mg/L PCP was removed with minimal intermediate accumulation and in parallel with complete denitrification of 20 mg-N/L nitrate. PCP initially was reductively dechlorinated to phenol, which was then mineralized to CO2 through pathways that began with aerobic activation via monooxygenation by Xanthobacter and anaerobic activation via carboxylation by Azospira and Thauera. Sulfur cycling induced by SO42- reduction affected the microbial community: The dominant bacteria became sulfate-reducers Desulfomicrobium, sulfur-oxidizers Sulfuritalea and Flavobacterium. This study provides insights and a promising technology for bioremediation of water contaminated with PCP, nitrate, and sulfate.
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Affiliation(s)
- Min Long
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Biodesign Swette Center for Environmental Biotechnology, Arizona State University, USA
| | - Zehra Esra Ilhan
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, USA
| | - Siqing Xia
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
| | - Chen Zhou
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, USA.
| | - Bruce E Rittmann
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, USA
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6
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Shojaie A, Fattahi M, Jorfi S, Ghasemi B. Synthesis and evaluations of Fe3O4–TiO2–Ag nanocomposites for photocatalytic degradation of 4-chlorophenol (4-CP): effect of Ag and Fe compositions. INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY 2018. [DOI: 10.1007/s40090-018-0145-4] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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7
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Tomašević A, Mijin D, Marinković A, Radišić M, Prlainović N, Đurović-Pejčev R, Gašić S. The photocatalytic degradation of carbofuran and Furadan 35-ST: the influence of inert ingredients. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:13808-13822. [PMID: 28405924 DOI: 10.1007/s11356-017-8949-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 03/27/2017] [Indexed: 06/07/2023]
Abstract
A comparative study on photocatalytic degradation of the pesticide carbofuran and its commercial product Furadan 35-ST in an aqueous suspension of ZnO, irradiated by long-wave light (315-400 nm), is presented in this study. In order to assess the effects of inert ingredients present in the commercial product Furadan 35-ST, non-competitive and competitive adsorption and kinetic studies of carbofuran degradation processes were conducted. A higher photochemical degradation rate was found for pure carbofuran in comparison to a two-component system, carbofuran and single addition of ingredients at appropriate concentrations, and the commercial product Furadan 35-ST. The overall effect of inert ingredients was evaluated from a competitive study using the model system of Furadan 35-ST. The results of a mineralization study, obtained by ion chromatography (IC) and total organic carbon (TOC) analyses, revealed the formation of acetate, oxalate, and formate ions. Photodegradation products of carbofuran, three of them detected for the first time, were identified based on high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) and gas chromatography-mass spectrometry (GC-MS) results, and their photodegradation pathways were proposed.
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Affiliation(s)
- Anđelka Tomašević
- Institute of Pesticides and Environmental Protection, Banatska 31b, P.O. Box 163, Zemun, Belgrade, 11080, Serbia
| | - Dušan Mijin
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, P.O. Box 3503, Belgrade, 11120, Serbia
| | - Aleksandar Marinković
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, P.O. Box 3503, Belgrade, 11120, Serbia
| | - Marina Radišić
- Innovation Center, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade, 11120, Serbia
| | - Nevena Prlainović
- Innovation Center, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade, 11120, Serbia.
| | - Rada Đurović-Pejčev
- Institute of Pesticides and Environmental Protection, Banatska 31b, P.O. Box 163, Zemun, Belgrade, 11080, Serbia
| | - Slavica Gašić
- Institute of Pesticides and Environmental Protection, Banatska 31b, P.O. Box 163, Zemun, Belgrade, 11080, Serbia
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8
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He X, Zhang Y, Shen M, Tian Y, Zheng K, Zeng G. Vermicompost as a natural adsorbent: evaluation of simultaneous metals (Pb, Cd) and tetracycline adsorption by sewage sludge-derived vermicompost. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:8375-8384. [PMID: 28181084 DOI: 10.1007/s11356-017-8529-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 01/30/2017] [Indexed: 06/06/2023]
Abstract
The simultaneous adsorption of heavy metals (Pb, Cd) and organic pollutant (tetracycline (TC)) by a sewage sludge-derived vermicompost was investigated. The maximal adsorption capacity for Pb, Cd, and TC in a single adsorptive system calculated from Langmuir equation was 12.80, 85.20, and 42.94 mg L-1, while for mixed substances, the adsorption amount was 2.99, 13.46, and 20.89 mg L-1, respectively. The adsorption kinetics fitted well to the pseudo-second-order model, implying chemical interaction between adsorbates and functional groups, such as -COOH, -OH, -NH, and -CO, as well as the formation of organo-metal complexes. Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) specific surface area measurement were adopted to gain insight into the structural changes and a better understanding of the adsorption mechanism. The sewage sludge-derived vermicompost can be a low cost and environmental benign eco-material for high efficient wastewater remediation.
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Affiliation(s)
- Xin He
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Yaxin Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China.
| | - Maocai Shen
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Ye Tian
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Kaixuan Zheng
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
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9
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Del Giacco T, Germani R, Saracino F, Stradiotto M. Counterion effect of cationic surfactants on the oxidative degradation of Alizarin Red-S photocatalysed by TiO2 in aqueous dispersion. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2016.10.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Anastasio P, Del Giacco T, Germani R, Spreti N, Tiecco M. Structure effects of amphiphilic and non-amphiphilic quaternary ammonium salts on photodegradation of Alizarin Red-S catalyzed by titanium dioxide. RSC Adv 2017. [DOI: 10.1039/c6ra25421g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The role of surfactants such as single- and double-tailed tetraalkylammonium bromide and various non-amphiphilic tetraalkylammonium salts was investigated on the TiO2photocatalyzed degradation of Alizarin Red-S under UV light irradiation.
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Affiliation(s)
- Paola Anastasio
- Dipartimento di Chimica
- Biologia e Biotecnologie
- Università di Perugia
- 06123 Perugia
- Italy
| | - Tiziana Del Giacco
- Dipartimento di Chimica
- Biologia e Biotecnologie
- Università di Perugia
- 06123 Perugia
- Italy
| | - Raimondo Germani
- Dipartimento di Chimica
- Biologia e Biotecnologie
- Università di Perugia
- 06123 Perugia
- Italy
| | - Nicoletta Spreti
- Dipartimento di Scienze Fisiche e Chimiche
- Università dell'Aquila
- 67100 L'Aquila
- Italy
| | - Matteo Tiecco
- Dipartimento di Chimica
- Biologia e Biotecnologie
- Università di Perugia
- 06123 Perugia
- Italy
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11
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Trellu C, Mousset E, Pechaud Y, Huguenot D, van Hullebusch ED, Esposito G, Oturan MA. Removal of hydrophobic organic pollutants from soil washing/flushing solutions: A critical review. JOURNAL OF HAZARDOUS MATERIALS 2016; 306:149-174. [PMID: 26707974 DOI: 10.1016/j.jhazmat.2015.12.008] [Citation(s) in RCA: 227] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 12/04/2015] [Accepted: 12/07/2015] [Indexed: 05/04/2023]
Abstract
The release of hydrophobic organoxenobiotics such as polycyclic aromatic hydrocarbons, petroleum hydrocarbons or polychlorobiphenyls results in long-term contamination of soils and groundwaters. This constitutes a common concern as these compounds have high potential toxicological impact. Therefore, the development of cost-effective processes with high pollutant removal efficiency is a major challenge for researchers and soil remediation companies. Soil washing (SW) and soil flushing (SF) processes enhanced by the use of extracting agents (surfactants, biosurfactants, cyclodextrins etc.) are conceivable and efficient approaches. However, this generates high strength effluents containing large amount of extracting agent. For the treatment of these SW/SF solutions, the goal is to remove target pollutants and to recover extracting agents for further SW/SF steps. Heterogeneous photocatalysis, technologies based on Fenton reaction chemistry (including homogeneous photocatalysis such as photo-Fenton), ozonation, electrochemical processes and biological treatments have been investigated. Main advantages and drawbacks as well as target pollutant removal mechanisms are reviewed and compared. Promising integrated treatments, particularly the use of a selective adsorption step of target pollutants and the combination of advanced oxidation processes with biological treatments, are also discussed.
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Affiliation(s)
- Clément Trellu
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, Marne-la-Vallée, 77454, France
| | - Emmanuel Mousset
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, Marne-la-Vallée, 77454, France
| | - Yoan Pechaud
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, Marne-la-Vallée, 77454, France
| | - David Huguenot
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, Marne-la-Vallée, 77454, France
| | - Eric D van Hullebusch
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, Marne-la-Vallée, 77454, France
| | - Giovanni Esposito
- University of Cassino and the Southern Lazio, Department of Civil and Mechanical Engineering, Via Di Biasio, 43, Cassino, 03043 FR, Italy
| | - Mehmet A Oturan
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, Marne-la-Vallée, 77454, France.
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12
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Tang L, Wang J, Zeng G, Liu Y, Deng Y, Zhou Y, Tang J, Wang J, Guo Z. Enhanced photocatalytic degradation of norfloxacin in aqueous Bi2WO6 dispersions containing nonionic surfactant under visible light irradiation. JOURNAL OF HAZARDOUS MATERIALS 2016; 306:295-304. [PMID: 26774984 DOI: 10.1016/j.jhazmat.2015.12.044] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 12/02/2015] [Accepted: 12/22/2015] [Indexed: 05/15/2023]
Abstract
Photocatalytic degradation is an alternative method to remove pharmaceutical compounds in water, however it is hard to achieve efficient rate because of the poor solubility of pharmaceutical compounds in water. This study investigated the photodegradation of norfloxacin in a nonionic surfactant Triton-X100 (TX100)/Bi2WO6 dispersion under visible light irradiation (400-750nm). It was found that the degradation of poorly soluble NOF can be strongly enhanced with the addition of TX100. TX100 was adsorbed strongly on Bi2WO6 surface and accelerated NOF photodegradation at the critical micelle concentration (CMC=0.25mM). Higher TX100 concentration (>0.25mM) lowered the degradation rate. In the presence of TX100, the degradation rate reached the maximum value when the pH value was 8.06. FTIR analyses demonstrated that the adsorbed NOF on the catalyst was completely degraded after 2h irradiation. According to the intermediates identified by HPLC/MS/MS, three possible degradation pathways were proposed to include addition of hydroxyl radical to quinolone ring, elimination of piperazynilic ring in fluoroquinolone molecules, and replacement of F atoms on the aromatic ring by hydroxyl radicals.
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Affiliation(s)
- Lin Tang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Jiajia Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Yani Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yaocheng Deng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yaoyu Zhou
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Jing Tang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Jingjing Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Zhi Guo
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
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13
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Zhang Y, He X, Zeng G, Chen T, Zhou Z, Wang H, Lu W. Enhanced photodegradation of pentachlorophenol by single and mixed nonionic and anionic surfactants using graphene-TiO₂ as catalyst. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:18211-18220. [PMID: 26194233 DOI: 10.1007/s11356-015-4785-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 05/26/2015] [Indexed: 06/04/2023]
Abstract
The photodegradation of pentachlorophenol (PCP) in a surfactant-containing (single and mixed) complex system using graphene-TiO2 (GT) as catalyst was investigated. The objective was to better understand the behavior of surfactants in a GT catalysis system for its possible use in remediation technology of soil contaminated by hydrophobic organic compounds (HOCs). In a single-surfactant system, surfactant molecules aggregated on GT via hydrogen bonding and electrostatic force; nonideal mixing between nonionic and anionic surfactants rendered GT surface with mixed admicelles in a mixed surfactant system. Both effects helped incorporating PCP molecules into surfactant aggregates on catalyst surface. Hence, the targeted pollutants were rendered easily available to photo-yielded oxidative radicals, and photodegradation efficiency was significantly enhanced. Finally, real soil washing-photocatalysis trials proved that anionic-nonionic mixed surfactant soil washing coupled with graphene-TiO2 photocatalysis can be one promising technology for HOC-polluted soil remediation.
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Affiliation(s)
- Yaxin Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- School of Environment, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Xin He
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
| | - Tan Chen
- School of Environment, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Zeyu Zhou
- School of Environment, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Hongtao Wang
- School of Environment, Tsinghua University, Beijing, 100084, People's Republic of China.
| | - Wenjing Lu
- School of Environment, Tsinghua University, Beijing, 100084, People's Republic of China
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Enhanced photocatalytic activity of TiO2 by reduced graphene oxide in mineralization of Rhodamine B dye. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2015.04.026] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Zhang Y, Zhou Z, Chen T, Wang H, Lu W. Graphene TiO2 nanocomposites with high photocatalytic activity for the degradation of sodium pentachlorophenol. J Environ Sci (China) 2014; 26:2114-2122. [PMID: 25288556 DOI: 10.1016/j.jes.2014.08.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 03/26/2014] [Accepted: 03/28/2014] [Indexed: 06/03/2023]
Abstract
A series of graphene-TiO2 photocatalysts was synthesized by doping TiO2 with graphene oxide via hydrothermal treatment. The photocatalytic capability of the catalysts under ultraviolet irradiation was evaluated in terms of sodium pentachlorophenol (PCP-Na) decomposition and mineralization. The structural and physicochemical properties of these nanocomposites were characterized by X-ray diffraction, N2 adsorption-desorption, transmission electron microscopy, scanning electron microscopy, Ultraviolet-visible diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, electron paramagnetic resonance spectra, and Fourier-transform infrared spectroscopy. The graphene-TiO2 nanocomposites exhibited higher photocatalytic efficiency than commercial P25 for the degradation of PCP-Na, and 63.4% to 82.9% of the total organic carbon was fully mineralized. The improved photocatalytic activity may be attributed to the accelerated interfacial electron-transfer process and the significantly prolonged lifetime of electron-hole pairs imparted by graphene sheets in the nanocomposites. However, excessive graphene and the inhomogeneous aggregation of TiO2 nanoparticles may decrease photodegradation efficiency.
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Affiliation(s)
- Yaxin Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; School of Environment, Tsinghua University, Beijing 100084, China.
| | - Zeyu Zhou
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Tan Chen
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Hongtao Wang
- School of Environment, Tsinghua University, Beijing 100084, China.
| | - Wenjing Lu
- School of Environment, Tsinghua University, Beijing 100084, China
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16
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Zhou Z, Zhang Y, Wang H, Chen T, Lu W. The comparative photodegradation activities of pentachlorophenol (PCP) and polychlorinated biphenyls (PCBs) using UV alone and TiO2-derived photocatalysts in methanol soil washing solution. PLoS One 2014; 9:e108765. [PMID: 25254664 PMCID: PMC4177926 DOI: 10.1371/journal.pone.0108765] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 08/26/2014] [Indexed: 11/19/2022] Open
Abstract
Photochemical treatment is increasingly being applied to remedy environmental problems. TiO2-derived catalysts are efficiently and widely used in photodegradation applications. The efficiency of various photochemical treatments, namely, the use of UV irradiation without catalyst or with TiO2/graphene-TiO2 photodegradation methods was determined by comparing the photodegadation of two main types of hydrophobic chlorinated aromatic pollutants, namely, pentachlorophenol (PCP) and polychlorinated biphenyls (PCBs). Results show that photodegradation in methanol solution under pure UV irradiation was more efficient than that with either one of the catalysts tested, contrary to previous results in which photodegradation rates were enhanced using TiO2-derived catalysts. The effects of various factors, such as UV light illumination, addition of methanol to the solution, catalyst dosage, and the pH of the reaction mixture, were examined. The degradation pathway was deduced. The photochemical treatment in methanol soil washing solution did not benefit from the use of the catalysts tested. Pure UV irradiation was sufficient for the dechlorination and degradation of the PCP and PCBs.
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Affiliation(s)
- Zeyu Zhou
- Department of Environmental Science and Engineering, Tsinghua University, Beijing, P.R. China
| | - Yaxin Zhang
- College of Environmental Science and Engineering, Hunan University, Hunan, P.R. China
| | - Hongtao Wang
- Department of Environmental Science and Engineering, Tsinghua University, Beijing, P.R. China
- * E-mail:
| | - Tan Chen
- Department of Environmental Science and Engineering, Tsinghua University, Beijing, P.R. China
| | - Wenjing Lu
- Department of Environmental Science and Engineering, Tsinghua University, Beijing, P.R. China
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Davezza M, Fabbri D, Pramauro E, Prevot AB. Photocatalytic degradation of chlorophenols in soil washing wastes containing Brij 35. Correlation between the degradation kinetics and the pollutants-micelle binding. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:3224-3231. [PMID: 23065604 DOI: 10.1007/s11356-012-1242-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Accepted: 10/01/2012] [Indexed: 06/01/2023]
Abstract
The photocatalytic degradations of 4-chlorophenol (CP), 4-chloro-2-methylphenol (CMP), 4-chloro-3,5-dimethylphenol (CDMP) and 4-chloro-2-isopropyl-5-methylphenol (CIMP) were investigated in water and in simulated soil washing wastes containing Brij 35 (polyoxyethylene(23)dodecyl ether) in the presence of TiO2 dispersions. A neat inhibition of substrate decomposition proportional to their growing hydrophobicity was observed in the washing wastes for CP, CMP and CDMP, whereas CIMP showed a different behaviour. The mineralization of the organic chlorine of CP and CIMP was relatively fast and complete, whereas it was much slower for CMP and CDMP. Micellar solubilization and substrate adsorption onto the semiconductor play opposite roles on the degradation kinetics, and a breakpoint between the corresponding induced effects was evidenced when the pollutants become completely bound to the micellar aggregates.
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Affiliation(s)
- M Davezza
- Dipartimento di Chimica, Università di Torino, 10125 Turin, Italy
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