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Bazrafshan E, Mohammadi L, Zarei AA, Mosafer J, Zafar MN, Dargahi A. Optimization of the photocatalytic degradation of phenol using superparamagnetic iron oxide (Fe 3O 4) nanoparticles in aqueous solutions. RSC Adv 2023; 13:25408-25424. [PMID: 37636498 PMCID: PMC10448231 DOI: 10.1039/d3ra03612j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 07/10/2023] [Indexed: 08/29/2023] Open
Abstract
The present work was carried out to remove phenol from aqueous medium using a photocatalytic process with superparamagnetic iron oxide nanoparticles (Fe3O4) called SPIONs. The photocatalytic process was optimized using a central composite design based on the response surface methodology. The effects of pH (3-7), UV/SPION nanoparticles ratio (1-3), contact time (30-90 minutes), and initial phenol concentration (20-80 mg L-1) on the photocatalytic process were investigated. The interaction of the process parameters and their optimal conditions were determined using CCD. The statistical data were analyzed using a one-way analysis of variance. We developed a quadratic model using a central composite design to indicate the photocatalyst impact on the decomposition of phenol. There was a close similarity between the empirical values gained for the phenol content and the predicted response values. Considering the design, optimum values of pH, phenol concentration, UV/SPION ratio, and contact time were determined to be 3, 80 mg L-1, 3, and 60 min, respectively; 94.9% of phenol was eliminated under the mentioned conditions. Since high values were obtained for the adjusted R2 (0.9786) and determination coefficient (R2 = 0.9875), the response surface methodology can describe the phenol removal by the use of the photocatalytic process. According to the one-way analysis of variance results, the quadratic model obtained by RSM is statistically significant for removing phenol. The recyclability of 92% after four consecutive cycles indicates the excellent stability of the photocatalyst for practical applications. Our research findings indicate that it is possible to employ response surface methodology as a helpful tool to optimize and modify process parameters for maximizing phenol removal from aqueous solutions and photocatalytic processes using SPIONs.
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Affiliation(s)
- Edris Bazrafshan
- Health Sciences Research Center, Torbat Heydariyeh University of Medical Sciences Torbat Heydariyeh 33787 95196 Iran
- Department of Environmental Health Engineering, Torbat Heydariyeh University of Medical Sciences Torbat Heydariyeh 33787 95196 Iran
| | - Leili Mohammadi
- Infectious Diseases and Tropical Medicine Research Center, Research Institute of Cellular and Molecular Sciences in Infectious Diseases, Zahedan University of Medical Sciences Zahedan 98167-43463 Iran
| | - Amin Allah Zarei
- Health Sciences Research Center, Torbat Heydariyeh University of Medical Sciences Torbat Heydariyeh 33787 95196 Iran
- Department of Environmental Health Engineering, Torbat Heydariyeh University of Medical Sciences Torbat Heydariyeh 33787 95196 Iran
| | - Jafar Mosafer
- Department of Environmental Health Engineering, Torbat Heydariyeh University of Medical Sciences Torbat Heydariyeh 33787 95196 Iran
- Research Center of Advanced Technologies in Medicine, Torbat Heydariyeh University of Medical Sciences Torbat Heydariyeh Iran
| | | | - Abdollah Dargahi
- Department of Environmental Health Engineering, Khalkhal University of Medical Sciences Khalkhal Iran
- Social Determinants of Health Research Center, Ardabil University of Medical Sciences Ardabil Iran
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Ichipi EO, Tichapondwa SM, Chirwa EM. Plasmonic effect and bandgap tailoring of Ag/Ag2S doped on ZnO nanocomposites for enhanced visible-light photocatalysis. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Lu Z, Xu Y, Akbari MZ, Liang C, Peng L. Insight into integration of photocatalytic and microbial wastewater treatment technologies for recalcitrant organic pollutants: From sequential to simultaneous reactions. CHEMOSPHERE 2022; 295:133952. [PMID: 35167831 DOI: 10.1016/j.chemosphere.2022.133952] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 02/09/2022] [Accepted: 02/09/2022] [Indexed: 06/14/2023]
Abstract
The more and more stringent environmental standards for recalcitrant organic pollutants pushed forward the development of integration of photocatalytic and microbial wastewater treatment technologies. The past studies proposed mainly two typical integration ways: a) Independent sequence of photocatalysis and biodegradation (ISPB) conducting the sequential reactions; b) Intimate coupling of photocatalysis and biodegradation (ICPB) conducting the simultaneous reactions. Although ICPB has received more attraction recently due to its novelty, ISPB gives an edge in certain cases. The article reviews the state-of-the-art ISPB and ICPB studies to comprehensively compare the two systems. The strengths and weaknesses of ISPB and ICPB regarding the treatment efficiency, cost, toxicity endurance and flexibility are contradistinguished. The reactor set-ups, photocatalysts, microbial characteristics of ISPB and ICPB are summarized. The applications for different kinds of recalcitrant compounds are elaborated to give a holistic view of the removal efficiencies and transformation pathways by the two technologies. Currently, in-depth understandings about the interference among mixed pollutants, co-existing components and key parameters in realistic wastewater are urgently needed. The long-term and large-scale application cases of the integration technologies are still rare. Overall, we conclude that both ISPB and ICPB technologies are reaching maturity while challenges still exist for two systems especially regarding the reliability, economy and generalization for realistic wastewater treatment plants. Future research should not only manage to reduce the cost and energy consumption by upgrading reactors and developing novel catalysts, but also attach importance to the cocktail effects of wastewater during the sequential or simultaneous photocatalysis and biodegradation.
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Affiliation(s)
- Zhikun Lu
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China
| | - Yifeng Xu
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China
| | - Mohammad Zahir Akbari
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China
| | - Chuanzhou Liang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China.
| | - Lai Peng
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China.
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Water Purification of Classical and Emerging Organic Pollutants: An Extensive Review. CHEMENGINEERING 2021. [DOI: 10.3390/chemengineering5030047] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The main techniques used for organic pollutant removal from water are adsorption, reductive and oxidative processes, phytoremediation, bioremediation, separation by membranes and liquid–liquid extraction. In this review, strengths and weaknesses of the different purification techniques are discussed, with particular attention to the newest results published in the scientific literature. This study highlighted that adsorption is the most frequently used method for water purification, since it can balance high organic pollutants removal efficiency, it has the possibility to treat a large quantity of water in semi-continuous way and has acceptable costs.
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Wang R, Du L, Gao W, Li J, Tsona NT, Zhang X, Hu X, Wang W, Liu H. Enhanced photocatalytic performance of PdO-loaded heterostructured nanobelts to degrade phenol. CHEMOSPHERE 2021; 276:130266. [PMID: 34088107 DOI: 10.1016/j.chemosphere.2021.130266] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 01/28/2021] [Accepted: 03/10/2021] [Indexed: 06/12/2023]
Abstract
Heterostructured catalysts play a significant role in the photodegradation of pollutants in wastewater. Combining the large surface of nanobelts with the high photocatalytic property of titanium dioxide (TiO2) nanoparticles is a promising method for preparing photocatalysts, which have an advanced photocatalytic activity and are easy to precipitate. In this work, titanium dioxide nanobelts (NB) and acid corroded titanium dioxide nanobelts (C-NB) were synthesized via a hydrothermal process under alkaline conditions. Their surfaces were then loaded with palladium oxide (PdO) nanoparticles to prepare heterostructured photocatalysts (PdO-NB and PdO-C-NB) by a well-designed chemical precipitation method. The photodegradation efficiencies of the four catalysts for phenol, as well as for methyl orange, were tested and the order of degradation efficiency was found to be PdO-C-NB > PdO-NB > C-NB > NB. A degradation efficiency of 61% for phenol was achieved within 90 min using PdO-C-NB, which was nearly twice as much as using NB. The enhanced photocatalytic property of PdO-C-NB was due to the large specific surface area, abundant photocatalytic active sites and the low recombination rate of electron-hole pairs. Therefore, the degradation of phenol and methyl orange was speeded up considerably. Considering the high catalytic activity of PdO-C-NB, the heterostructure catalyst is of great significance to the degradation of organic wastewater, and has an important impact on our ecological environment and human health.
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Affiliation(s)
- Ruixue Wang
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Lin Du
- Environment Research Institute, Shandong University, Qingdao, 266237, China.
| | - Wenqiang Gao
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Jianlong Li
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Narcisse T Tsona
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Xiaofei Zhang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Xinming Hu
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Wenxing Wang
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Hong Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China.
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Okcu GD, Okten HE, Yalcuk A. A hybrid process for 2,4-dichlorophenoxy acetic acid herbicidal treatment and its microbial identification by MALDI-TOF mass spectrometry. ENVIRONMENTAL TECHNOLOGY 2020; 41:764-776. [PMID: 30092741 DOI: 10.1080/09593330.2018.1510433] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 08/05/2018] [Indexed: 06/08/2023]
Abstract
The feasibility of coupling photocatalysis and a biological treatment to remove a herbicide - 2,4-dichlorophenoxy acetic acid (2,4-D) - from pure water was examined using batch experiments following three protocols: aerated (A-BR) and non-aerated biodegradation (NA-BR) alone, and intimately combined photodegradation and biodegradation (P-B). In view of a subsequent biological treatment, 15 and 180 min irradiation times were chosen in accordance with spectrophotometric and LC-MS/MS results that indicated the decrease in the COD/TOC ratio during photocatalysis. Pre-treatment led to a quick decrease in concentration of 2,4-D and COD during the biological process: a 78.79 ± 0.30% COD removal and 38.23 ± 3.12% 2,4-D elimination was measured after 5760 min in A-BR, and 80.89 ± 0.81% COD and 81.36 ± 1.37% 2,4-D removal was achieved after 2880 min in P-B. For species identification using matrix-assisted laser desorption/ionization (MALDI)-time of flight (TOF)-TOF/MS equipment, Aeromonas eucrenophila, Stenotrophomonas acidaminiphila, Ralstonia pickettii, Sphingobacterium multivorum and Acinetobacter towneri were identified with high accuracy, and they play important roles in the degradation of 2,4-D.
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Affiliation(s)
- Gamze Dogdu Okcu
- Department of Environmental Engineering, Abant Izzet Baysal University, Bolu, Turkey
| | - Hatice Eser Okten
- Department of Environmental Engineering, Izmir Institute of Technology, Urla, Izmir, Turkey
| | - Arda Yalcuk
- Department of Environmental Engineering, Abant Izzet Baysal University, Bolu, Turkey
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Thirugnanasambandham K, Ganesamoorthy R. Dual Treatment of Milk Processing Industry Wastewater Using Electro Fenton Process Followed by Anaerobic Treatment. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2019. [DOI: 10.1515/ijcre-2019-0074] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Milk processing industry produced in large amounts wastewater with high pH, temperature and toxic matters. These effluents can exhibit serious environmental problems and public health concerns if improperly disposed. In this present study, an attempt has been made to investigate the efficiency of combined treatment for milk processing industry wastewater. Advanced oxidation process used as primary treatment where as biological process is applied as post treatment to degrade the toxic matters. Parameters affecting the combined process on the percentage removal of turbidity and chemical oxygen (COD) demand were studied in detail. Under the optimum conditions, 93 % of turbidity and 97 % of COD were removed. These results indicated that the proposed technique could be used to degrade the maximum turbidity and chemical oxygen demand from milk processing industry wastewater.
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8
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Combined biological and advanced oxidation process for decolorization of textile dyes. SN APPLIED SCIENCES 2018. [DOI: 10.1007/s42452-018-0111-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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9
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Geng Y, Deng Y, Chen F, Jin H, Hou T, Tao K. Isopropanol biodegradation by immobilized Paracoccus denitrificans in a three-phase fluidized bed reactor. Prep Biochem Biotechnol 2018; 46:747-754. [PMID: 26716611 DOI: 10.1080/10826068.2015.1135446] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
A three-phase bed bioreactor including a mix of immobilized microbes was used to degrade isopropanol (IPA). The immobilization method was studied and cells immobilized with calcium alginate, polyvinyl alcohol, activated carbon, and SiO2 were demonstrated to be the best immobilization method for the degradation of 90% of 2 g/L IPA in just 4 days, 1 day earlier than with free cells. Acetone was monitored as an indicator of microbial IPA utilization as the major intermediate of aerobic IPA biodegradation. The bioreactor was operated at hydraulic retention time (HRT) values of 32, 24, 16, 12, and 10 hr, which correspond to membrane fluxes of 0.03, 0.04, 0.06, 0.08, and 0.10 L/m2/hr, respectively. The chemical oxygen demand (COD) removal efficiencies were maintained at 98.0, 97.8, 89.1, 80.6, and 71.1% at a HRT of 32, 24, 16, 12, and 10 hr, respectively, while the IPA degradations were 98.6, 98.3, 90.3, 81.6, and 73.3%, respectively. With a comprehensive consideration of COD removal and economy, the optimal HRT was 24 hr. The results demonstrate the potential of immobilized mixed bacterial consortium in a three-phase fluidized bed reactor system for the aerobic treatment of wastewater containing IPA.
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Affiliation(s)
- Yucong Geng
- a Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education , College of Life Sciences, Sichuan University , Chengdu , China
| | - Yuanjie Deng
- a Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education , College of Life Sciences, Sichuan University , Chengdu , China
| | - Feilong Chen
- a Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education , College of Life Sciences, Sichuan University , Chengdu , China
| | - Hong Jin
- a Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education , College of Life Sciences, Sichuan University , Chengdu , China
| | - Taiping Hou
- a Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education , College of Life Sciences, Sichuan University , Chengdu , China
| | - Ke Tao
- a Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education , College of Life Sciences, Sichuan University , Chengdu , China
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10
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Wu M, Deng J, Li J, Li Y, Li J, Xu H. Simultaneous biological-photocatalytic treatment with strain CDS-8 and TiO 2 for chlorothalonil removal from liquid and soil. JOURNAL OF HAZARDOUS MATERIALS 2016; 320:612-619. [PMID: 27501883 DOI: 10.1016/j.jhazmat.2016.07.063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 07/24/2016] [Accepted: 07/25/2016] [Indexed: 06/06/2023]
Abstract
In this study, a novel chlorothalonil (CTN) degrading bacterial strain CDS-8, identified as Pseudomonas sp., was combined with photocatalyst titanium dioxide (TiO2) for the CTN degradation in liquid and soil. After 7day incubation, 90.73% of CTN was removed from mineral salt medium (MSM) by CDS-8 with the optimal condition at pH 7.0 and 30°C. Single biodegradation or photocatalytic degradation could not degrade CTN completely, and many toxic and persistent intermediate metabolites remained. However, simultaneous biological-photocatalytic treatments could markedly remove CTN and reduce the chemical oxygen demand (COD) which could not be removed by single biodegradation or photocatalytic degradation. In MSM, treatment with CDS-8/40mgL-1 TiO2 showed the highest COD removal rate (84.10%). Furthermore, combined CDS-8/TiO2 treatments could effectively degrade CTN in soil. In treatments with CDS-8/20mgkg-1 TiO2 of soil, the maximum CTN removal rate reached 97.55% in turned soils. However, with CDS-8/40mgkg-1 TiO2 of soil, the maximum CTN removal rate (94.94%) was found in static soil. In general, the combined biological-photocatalytic treatments provided a promising alternative candidate for the remediation of CTN-contaminated sites.
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Affiliation(s)
- Minghui Wu
- Key Laboratory of Bio-resources and Eco-environment (Ministry of Education), College of Life Science, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Jing Deng
- Sichuan Tourism University, Chengdu, Sichuan, 610000, China
| | - Junjie Li
- Key Laboratory of Bio-resources and Eco-environment (Ministry of Education), College of Life Science, Sichuan University, Chengdu, Sichuan, 610064, China
| | | | - Jinze Li
- Key Laboratory of Bio-resources and Eco-environment (Ministry of Education), College of Life Science, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Heng Xu
- Key Laboratory of Bio-resources and Eco-environment (Ministry of Education), College of Life Science, Sichuan University, Chengdu, Sichuan, 610064, China.
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Kuppusamy S, Palanisami T, Megharaj M, Venkateswarlu K, Naidu R. Ex-Situ Remediation Technologies for Environmental Pollutants: A Critical Perspective. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2016; 236:117-192. [PMID: 26423074 DOI: 10.1007/978-3-319-20013-2_2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Pollution and the global health impacts from toxic environmental pollutants are presently of great concern. At present, more than 100 million people are at risk from exposure to a plethora of toxic organic and inorganic pollutants. This review is an exploration of the ex-situ technologies for cleaning-up the contaminated soil, groundwater and air emissions, highlighting their principles, advantages, deficiencies and the knowledge gaps. Challenges and strategies for removing different types of contaminants, mainly heavy metals and priority organic pollutants, are also described.
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Affiliation(s)
- Saranya Kuppusamy
- CERAR-Centre for Environmental Risk Assessment and Remediation, University of South Australia, Mawson Lakes, SA, 5095, Australia
- CRC CARE-Cooperative Research Centre for Contamination Assessment and Remediation of Environment, 486, Salisbury South, SA, 5106, Australia
| | - Thavamani Palanisami
- CRC CARE-Cooperative Research Centre for Contamination Assessment and Remediation of Environment, 486, Salisbury South, SA, 5106, Australia
- GIER- Global Institute for Environmental Research, Faculty of Science and Information Technology, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Mallavarapu Megharaj
- CRC CARE-Cooperative Research Centre for Contamination Assessment and Remediation of Environment, 486, Salisbury South, SA, 5106, Australia.
- GIER- Global Institute for Environmental Research, Faculty of Science and Information Technology, The University of Newcastle, Callaghan, NSW, 2308, Australia.
| | - Kadiyala Venkateswarlu
- Formerly Department of Microbiology, Sri Krishnadevaraya University, Anantapur, 515055, India
| | - Ravi Naidu
- CRC CARE-Cooperative Research Centre for Contamination Assessment and Remediation of Environment, 486, Salisbury South, SA, 5106, Australia
- GIER- Global Institute for Environmental Research, Faculty of Science and Information Technology, The University of Newcastle, Callaghan, NSW, 2308, Australia
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Xu N, Takei T, Miura A, Kumada N, Katsumata KI, Matsushita N, Okada K. Study on the Effect of Pt Intercalation into Layered Niobate Perovskite for Photocatalytic Behavior. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:7660-7665. [PMID: 26084377 DOI: 10.1021/acs.langmuir.5b01958] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A novel photocatalyst consisting of an intercalated perovskite H(1-2x)Pt(x)LaNb2O7 was fabricated by ion exchange. Synchrotron X-ray diffraction and X-ray photoelectron spectroscopy results confirmed that Pt(2+) exists within the interlayer space of the layered perovskite. H(1-2x)Pt(x)LaNb2O7 composed of layered niobate perovskite and intercalated Pt(2+) completely degraded a 20 ppm phenol solution in 3 h under irradiation by Xe light, which exhibits photocatalytic activity superior to those of RbLaNb2O7, Pt-deposited RbLaNb2O7, and HLaNb2O7. From first-principles density functional theory simulation, high photocatalytic activity of H(1-2x)Pt(x)LaNb2O7 is attributed to the emergence of a new O 2p-Pt 5d hybridized band on top of the valence band.
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Affiliation(s)
- Nan Xu
- †Center for Crystal Science and Technology, University of Yamanashi, 7-32 Miyamae, Kofu, Yamanashi 400-8511, Japan
| | - Takahiro Takei
- †Center for Crystal Science and Technology, University of Yamanashi, 7-32 Miyamae, Kofu, Yamanashi 400-8511, Japan
| | - Akira Miura
- ‡Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Nobuhiro Kumada
- †Center for Crystal Science and Technology, University of Yamanashi, 7-32 Miyamae, Kofu, Yamanashi 400-8511, Japan
| | - Ken-ichi Katsumata
- §Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama, Kanagawa 226-8503, Japan
| | - Nobuhiro Matsushita
- §Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama, Kanagawa 226-8503, Japan
| | - Kiyoshi Okada
- §Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama, Kanagawa 226-8503, Japan
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Zhou D, Xu Z, Dong S, Huo M, Dong S, Tian X, Cui B, Xiong H, Li T, Ma D. Intimate Coupling of Photocatalysis and Biodegradation for Degrading Phenol Using Different Light Types: Visible Light vs UV Light. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:7776-7783. [PMID: 26076382 DOI: 10.1021/acs.est.5b00989] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Intimate coupling of photocatalysis and biodegradation (ICPB) technology is attractive for phenolic wastewater treatment, but has only been investigated using UV light (called UPCB). We examined the intimate coupling of visible-light-induced photocatalysis and biodegradation (VPCB) for the first time. Our catalyst was prepared doping both of Er(3+) and YAlO3 into TiO2 which were supported on macroporous carriers. The macroporous carriers was used to support for the biofilms as well. 99.8% removal efficiency of phenol was achieved in the VPCB, and this was 32.6% higher than that in the UPCB. Mineralization capability of UPCB was even worse, due to less adsorbable intermediates and cell lysis induced soluble microbial products release. The lower phenol degradation in the UPCB was due to the serious detachment of the biofilms, and then the microbes responsible for phenol degradation were insufficient due to disinfection by UV irradiation. In contrast, microbial communities in the carriers were well protected under visible light irradiation and extracellular polymeric substances secretion was enhanced. Thus, we found that the photocatalytic reaction and biodegradation were intimately coupled in the VPCB, resulting in 64.0% removal of dissolved organic carbon. Therefore, we found visible light has some advantages over UV light in the ICPB technology.
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Affiliation(s)
- Dandan Zhou
- †Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
- ‡School of Environment, Northeast Normal University, Changchun 130117, China
| | - Zhengxue Xu
- †Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
| | - Shanshan Dong
- †Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
| | - Mingxin Huo
- ‡School of Environment, Northeast Normal University, Changchun 130117, China
| | - Shuangshi Dong
- †Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
- §State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, China
| | - Xiadi Tian
- †Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
| | - Bin Cui
- †Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
| | - Houfeng Xiong
- †Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
| | - Tingting Li
- †Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
| | - Dongmei Ma
- †Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
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Zangeneh H, Zinatizadeh A, Habibi M, Akia M, Hasnain Isa M. Photocatalytic oxidation of organic dyes and pollutants in wastewater using different modified titanium dioxides: A comparative review. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.10.043] [Citation(s) in RCA: 337] [Impact Index Per Article: 37.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Diya'uddeen BH, Rahim Pouran S, Abdul Aziz AR, Daud WMAW. Fenton oxidative treatment of petroleum refinery wastewater: process optimization and sludge characterization. RSC Adv 2015. [DOI: 10.1039/c5ra08079g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Good sedimentation and compaction properties of the Fenton generated sludge shows its easy handling.
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Affiliation(s)
- B. H. Diya'uddeen
- Department of Chemical Engineering
- Faculty of Engineering
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
| | - Shima Rahim Pouran
- Department of Chemical Engineering
- Faculty of Engineering
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
| | - A. R. Abdul Aziz
- Department of Chemical Engineering
- Faculty of Engineering
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
| | - W. M. A. W. Daud
- Department of Chemical Engineering
- Faculty of Engineering
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
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16
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Jafari N, Soudi MR, Kasra-Kermanshahi R. Biodegradation perspectives of azo dyes by yeasts. Microbiology (Reading) 2014. [DOI: 10.1134/s0026261714050130] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
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17
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Kiran S, Ali S, Asgher M. Degradation and mineralization of azo dye reactive blue 222 by sequential Photo-Fenton's oxidation followed by aerobic biological treatment using white rot fungi. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2013; 90:208-215. [PMID: 23272326 DOI: 10.1007/s00128-012-0888-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Accepted: 11/09/2012] [Indexed: 06/01/2023]
Abstract
A two stage sequential Photo-Fenton's oxidation followed by aerobic biological treatment using two white rot fungi P. ostreatus IBL-02 (PO) and P. chrysosporium IBL-03 (PC) was performed to check decolorization and to enhance mineralization of azo dye Reactive Blue 222 (RB222). In the first stage, selected dye was subjected to Photo-Fenton's oxidation with decolorization percentage ≈90 % which was further increased to 96.88 % and 95.23 % after aerobic treatment using two white rot fungi P. ostreatus IBL-02 (PO) and P. chrysosporium IBL-03 (PC), respectively. Mineralization efficiency was accessed by measuring the water quality assurance parameters like COD, TOC, TSS and Phenolics estimation. Reduction in COD, TOC, TSS and Phenolics were found to be 95.34 %, 90.11 %, 90.84 % and 92.22 %, respectively in two stage sequential processes. The degradation products were characterized by UV-visible and FTIR spectral techniques and their toxicity was measured. The results provide evidence that both fungal strains were able to oxidize and mineralize the selected azo dye into non-toxic metabolites.
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Affiliation(s)
- Shumaila Kiran
- Department of Applied Chemistry, Government College University, Faisalabad, 38000, Pakistan.
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18
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Jafari N, Kasra-Kermanshahi R, Soudi MR, Mahvi AH, Gharavi S. Degradation of a textile reactive azo dye by a combined biological-photocatalytic process: Candida tropicalis Jks2 -Tio2/Uv. IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2012; 9:33. [PMID: 23369285 PMCID: PMC3570398 DOI: 10.1186/1735-2746-9-33] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2012] [Accepted: 12/15/2012] [Indexed: 12/07/2022]
Abstract
In the present study, the decolorization and degradation of Reactive Black 5 (RB5) azo dye was investigated by biological, photocatalytic (UV/TiO2) and combined processes. Application of Candida tropicalis JKS2 in treatment of the synthetic medium containing RB5 indicated complete decolorization of the dye with 200 mg/L in less than 24 h. Degradation of the aromatic rings, resulting from the destruction of the dye, did not occur during the biological treatment. Mineralization of 50 mg/L RB5 solution was obtained after 80 min by photocatalytic process (in presence of 0.2 g/L TiO2). COD (chemical oxygen demand) was not detectable after complete decolorization of 50 mg/L RB5 solution. However, photocatalytic process was not effective in the removal of the dye at high concentrations (≥200 mg/L). With 200 mg/L concentration, 74.9% of decolorization was achieved after 4 h illumination under photocatalytic process and the absorbance peak in UV region (attributed to aromatic rings) was not completely removed. A two-step treatment process, namely, biological treatment by yeast followed by photocatalytic degradation, was also assessed. In the combined process (with 200 mg/L RB5), absorbance peak in UV region significantly disappeared after 2 h illumination and about 60% COD removal was achieved in the biological step. It is suggested that the combined process is more effective than the biological and photocatalytic treatments in the remediation of aromatic rings.
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Affiliation(s)
- Narjes Jafari
- Department of Biology, Faculty of Science, Alzahra University, Tehran, Iran.
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19
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Herrera-Melián JA, Martín-Rodríguez AJ, Ortega-Méndez A, Araña J, Doña-Rodríguez JM, Pérez-Peña J. Degradation and detoxification of 4-nitrophenol by advanced oxidation technologies and bench-scale constructed wetlands. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2012; 105:53-60. [PMID: 22525833 DOI: 10.1016/j.jenvman.2012.03.044] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Revised: 03/07/2012] [Accepted: 03/21/2012] [Indexed: 05/31/2023]
Abstract
The degradation and detoxification towards the duckweed Lemna minor of 4-nitrophenol (4NP) was studied by means of bench-scale constructed wetlands (CWs), TiO(2)-photocatalysis and Fenton + photoFenton reactions. The main goal of this work was to compare the three treatment techniques to evaluate their possible combination for the efficient, low cost treatment of 4NP effluents. In CWs, adsorption on the substrate of 4NP was found to achieve 34-45%. Low concentrations (up to 100 ppm) of 4NP were successfully treated by CWs in 8-12 h. The microbial degradation of 4NP started after a lag phase which was longer with higher initial concentrations of the pollutant. The greatest degradation rate was found to occur at initial concentrations of 4NP between 60 and 90 ppm. Solar TiO(2)-photocatalysis was faster than the CWs. The greatest removals in terms of mass of 4NP removed after 6 h of irradiation were found to occur at 4NP concentrations of about 200 ppm. Fenton reaction provided complete 4NP degradation up to 500 ppm in only 30 min but TOC was removed by only about 40%. The resulting toxicities were below 20% for initial 4NP concentrations below 300 ppm. It was the Fenton + photoFenton combination (180 min in total) that provided TOC reductions up to 80% and negative L. minor growth inhibition for almost all the 4NP concentrations tested. The combination of solar TiO(2)-photocatalysis (6 h) with CWs (16 h) was able to completely treat and detoxify 4NP effluents with concentrations as high as 200 ppm of the organic.
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Affiliation(s)
- J A Herrera-Melián
- FEAM-C.I.D.I.A., Departamento de Química, Universidad de Las Palmas de Gran Canaria, Edificio de Ciencias Basicas, Campus de Tafira, Las Palmas de Gran Canaria, Spain.
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20
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2,4,6-trichlorophenol (TCP) photobiodegradation and its effect on community structure. Biodegradation 2012; 23:575-83. [DOI: 10.1007/s10532-012-9534-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Accepted: 01/02/2012] [Indexed: 11/27/2022]
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21
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Internal loop photobiodegradation reactor (ILPBR) for accelerated degradation of sulfamethoxazole (SMX). Appl Microbiol Biotechnol 2012; 94:527-35. [DOI: 10.1007/s00253-011-3742-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Revised: 11/02/2011] [Accepted: 11/16/2011] [Indexed: 11/26/2022]
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22
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Mungmart M, Kijsirichareonchai U, Tonanon N, Prechanont S, Panpranot J, Yamamoto T, Eiadua A, Sano N, Tanthapanichakoon W, Charinpanitkul T. Metal catalysts impregnated on porous media for aqueous phenol decomposition within three-phase fluidized-bed reactor. JOURNAL OF HAZARDOUS MATERIALS 2011; 185:606-612. [PMID: 20956059 DOI: 10.1016/j.jhazmat.2010.09.061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Revised: 08/26/2010] [Accepted: 09/17/2010] [Indexed: 05/30/2023]
Abstract
Performance of metal catalysts to decompose aqueous phenol was experimentally investigated. Comparison of the phenol decomposition rates within three-phase fluidized-bed reactors utilizing only O(3), TiO(2) deposited on silica beads, metal catalyst (Ni or Co) impregnated on mesoporous carbon beads, or O(3) in combination with each catalyst was thoroughly examined. It was found that the use of Co catalyst with the presence of O(3) led to the best removal condition which aqueous phenol was completely decomposed within 10 min (k = 0.1944 min(-1)). In contrast, the use of TiO(2) without O(3) resulted in the worst decomposition of phenol (k = 0.0066 min(-1)). Some intermediate products, such as hydroquinone and catechol, were also detected but their final concentrations were negligibly low.
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Affiliation(s)
- M Mungmart
- Faculty of Engineering, Center of Excellence in Particle Technology, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand
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23
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Xia S, Yan N, Zhu J, Zhang Y. Biofilm coupled with UV irradiation for phenol degradation and change of its community structure. Bioprocess Biosyst Eng 2011; 34:607-14. [PMID: 21234766 DOI: 10.1007/s00449-010-0509-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2010] [Accepted: 12/24/2010] [Indexed: 10/18/2022]
Abstract
The extensive use of phenol compounds and the inability to remove these compounds during wastewater treatment have resulted in the widespread occurrence of phenols in the natural environment. Phenols have been linked to serious risks to human and environmental health. Hence, the need to develop technologies that can effectively remove phenols from wastewater and source waters is a pressing challenge. In this study, light ceramic particles were immersed in activated sludge acclimated to degrade phenol, and microorganisms were allowed to attach to the particles surface to form biofilm. Then the ceramic particles with biofilm were moved into the photolytic circulating-bed biofilm reactor made of quartz glass, which was used for the degradation of phenol by three protocols: photolysis with UV light alone (P), biodegradation alone (B), and the two mechanisms operating simultaneously (photobiodegradation, P&B). The experimental results indicated that phenol removal rate was quickest by B experiment. However, P&B experiment gave more complete mineralization of phenol than that by other protocols. During P&B experiment, the microorganisms grown on porous ceramic carrier still kept the bioactivity degrading phenol, even under UV light irradiation. However, the dominant members of the bacterial community changed dramatically after the intimately coupled photobiodegradation, according to molecular biological analysis to the biofilm. Whereas Beijerinckia sp. was the dominant strain in the inoculum, it was replaced by Thauera sp. MZ1T that played a main role on degrading phenol during P&B experiment.
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Affiliation(s)
- Siqing Xia
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, People's Republic of China
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24
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Suryaman D, Hasegawa K. Biological and photocatalytic treatment integrated with separation and reuse of titanium dioxide on the removal of chlorophenols in tap water. JOURNAL OF HAZARDOUS MATERIALS 2010; 183:490-496. [PMID: 20692763 DOI: 10.1016/j.jhazmat.2010.07.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2010] [Revised: 07/13/2010] [Accepted: 07/13/2010] [Indexed: 05/29/2023]
Abstract
We investigated biological, photocatalytic, and combination of biological and photocatalytic treatments in order to remove a mixture of 2-chlorophenol, 2,4-dichlorophenol, 2,4,5-trichlorophenol, and pentachlorophenol in tap water (total: 100 mg L(-1), each: 25 mg L(-1)). The removal of chlorinated phenols was conducted with a flow biological treatment and a circulative flow photocatalytic treatment under black light and sunlight irradiations integrated with titanium dioxide separation and reuse. The combined biological-photocatalytic treatment significantly shortened the degradation and mineralization time of both the biological treatment and the photocatalytic treatment. The removed chlorophenols per hour by the combined biological-photocatalytic treatment was 25.8 mg h(-1), whereas by the combined photocatalytic-biological treatment was 10.5 mg h(-1). After a large portion of biodegradable 2-chlorophenol and 2,4-dichlorophenol, and around half amount of slightly biodegradable 2,4,5-trichlorophenol were removed by the biological treatment, the remained three chlorophenols, biorecalcitrant pentachlorophenol, and biodegradation products were completely removed by the subsequent photocatalytic treatment. Since titanium dioxide particles in tap water spontaneously sedimented on standing after the photocatalytic treatment, the combined treatment can be operated by integrating with the titanium dioxide separation and reuse. The TiO(2) particles were recovered and reused at least three times without significantly decreasing the removal efficiency.
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Affiliation(s)
- Dhanus Suryaman
- Agency for the Assessment and Application of Technology, M.H. Thamrin No. 8, Jakarta 10340, Indonesia.
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25
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Photobiodegradation of phenol with ultraviolet irradiation of new ceramic biofilm carriers. Biodegradation 2010; 21:881-7. [DOI: 10.1007/s10532-010-9348-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2009] [Accepted: 03/07/2010] [Indexed: 10/19/2022]
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26
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Performance Evaluation of AOP/Biological Hybrid System for Treatment of Recalcitrant Organic Compounds. INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING 2010. [DOI: 10.1155/2010/590169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Process water from nuclear fuel recovery unit operations contains a variety of toxic organic compounds. The use of decontamination reagents such asCCl4together with phenolic tar results in wastewater with a high content of chlorophenols. In this study, the extent of dehalogenation of toxic aromatic compounds was evaluated using a photolytic advanced oxidation process (AOP) followed by biodegradation in the second stage. A hard-to-degrade toxic pollutant, 4-chlorophenol (4-CP), was used to represent a variety of recalcitrant aromatic pollutants in effluent from the nuclear industry. A UV-assisted AOP/bioreactor system demonstrated a great potential in treatment of nuclear process wastewater and this was indicated by high removal efficiency (>98%) under various 4-CP concentrations. Adding hydrogen peroxide (H2O2) as a liquid catalyst further improved biodegradation rate but the effect was limited by the scavenging ofOH•radicals under high concentrations ofH2O2.
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27
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Suryaman D, Hasegawa K, Kagaya S, Yoshimura T. Continuous flow photocatalytic treatment integrated with separation of titanium dioxide on the removal of phenol in tap water. JOURNAL OF HAZARDOUS MATERIALS 2009; 171:318-322. [PMID: 19570607 DOI: 10.1016/j.jhazmat.2009.06.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2008] [Revised: 05/23/2009] [Accepted: 06/02/2009] [Indexed: 05/28/2023]
Abstract
We studied the continuous flow photocatalytic treatment integrated with separation/reuse of titanium dioxide on the removal of phenol (20 mg l(-1)) in electrolytes containing tap water. A circulative flow tubular photoreactor and a separation tank were used, where inflow of phenol continuously flowed into a mixing tank (for titanium dioxide suspension) and treated water overflowed from the separation tank. Black light and sunlight were used by turns as the light source on the photocatalytic treatment. Photocatalytic removal of phenol was maximum at the circulative flow rate of 600 ml min(-1) and the transmittance of 0.3%. Integration of circulative photocatalytic treatment and titanium dioxide separation and continuous use of titanium dioxide could be performed effectively at low inflow of 10 ml min(-1). The titanium dioxide slurry sedimented spontaneously by standing was continuously used for at least 72 h without decreasing the efficiency of the photocatalytic treatment. The used titanium dioxide can be replaced with a fresh one by draw and fill method without interrupting the treatment.
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Affiliation(s)
- Dhanus Suryaman
- Agency for the Assessment and Application of Technology, Jakarta, Indonesia.
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28
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Suryaman D, Hasegawa K, Kagaya S, Yoshimura T. Continuous mineralization of concentrated phenol dissolved in an electrolyte-containing tap water by integrating biological-photocatalytic treatment with TiO2 separation: utilization of sunlight and reuse of TiO2. ENVIRONMENTAL TECHNOLOGY 2009; 30:215-224. [PMID: 19438053 DOI: 10.1080/09593330801983573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The continuous mineralization of concentrated phenol (200 mg l(-1)) in an electrolyte-containing tap water was investigated using a biological-photocatalytic treatment integrated with TiO2 separation. Black light and sunlight were used as the light source, and the reuse of TiO2 was also studied. The mineralization of phenol in tap water and the reuse of TiO2 were conducted in a flow system in which a bioreactor is combined with a narrow tube photoreactor operated under single pass and circulative flows, and the sedimented TiO2 is recycled. A high circulative flow rate prevented the TiO2 particles from coagulating due to the electrolytes in the tap water. A flow-circulation-flow operation mode using the integrated biological-photocatalytic-TiO2 separation system was the optimum for treating the concentrated phenol in the electrolyte-containing tap water without interrupting the inflow of the wastewater and the discharge of the treated water. The optimum mineralization (phenol: 0.6 mg l(-1) and total organic carbon: 6.5 mg l(-1)) was attained by recycling the biologically treated phenol solution (20.1 mg l(-1)) at the flow rate of 600 ml min(-1) under sunlight irradiation, while maintaining the inflow and the discharge rates at 15 ml min(-1). The TiO2 particles were spontaneously sedimented by coagulation in a separation tank during the operation and the TiO2 can be reused without reducing the efficiency of five repeated treatments.
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Affiliation(s)
- D Suryaman
- Department of Chemical and Biochemical Engineering, Faculty of Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
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29
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Ballesteros Martín MM, Sánchez Pérez JA, García Sánchez JL, Montes de Oca L, Casas López JL, Oller I, Malato Rodríguez S. Degradation of alachlor and pyrimethanil by combined photo-Fenton and biological oxidation. JOURNAL OF HAZARDOUS MATERIALS 2008; 155:342-9. [PMID: 18162295 DOI: 10.1016/j.jhazmat.2007.11.069] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2007] [Revised: 11/15/2007] [Accepted: 11/20/2007] [Indexed: 05/12/2023]
Abstract
Biodegradability of aqueous solutions of the herbicide alachlor and the fungicide pyrimethanil, partly treated by photo-Fenton, and the effect of photoreaction intermediates on growth and DOC removal kinetics of the bacteria Pseudomonas putida CECT 324 are demonstrated. Toxicity of 30-120 mg L(-1) alachlor and pyrimethanil has been assayed in P. putida. The biodegradability of photocatalytic intermediates found at different photo-treatment times was evaluated for each pesticide. At a selected time during batch-mode phototreatment, larger-scale biodegradation kinetics were analysed in a 12 L bubble column bioreactor. Both alachlor and pyrimethanil are non-toxic for P. putida CECT 324 at the test concentrations, but they are not biodegradable. A approximately 100 min photo-Fenton pre-treatment was enough to enhance biodegradability, the biological oxidation response being dependent on the pesticide tested. The different alachlor and pyrimethanil respiration and carbon uptake rates in pre-treated solutions are related to change in the growth kinetics of P. putida. Reproducible results have shown that P. putida could be a suitable microorganism for determining photo-Fenton pre-treatment time.
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MESH Headings
- Acetamides/chemistry
- Acetamides/metabolism
- Acetamides/radiation effects
- Acetamides/toxicity
- Biodegradation, Environmental
- Fungicides, Industrial/chemistry
- Fungicides, Industrial/metabolism
- Fungicides, Industrial/radiation effects
- Fungicides, Industrial/toxicity
- Herbicides/chemistry
- Herbicides/metabolism
- Herbicides/radiation effects
- Herbicides/toxicity
- Iron/chemistry
- Oxidation-Reduction
- Pseudomonas putida/drug effects
- Pseudomonas putida/growth & development
- Pseudomonas putida/metabolism
- Pyrimidines/chemistry
- Pyrimidines/metabolism
- Pyrimidines/radiation effects
- Pyrimidines/toxicity
- Ultraviolet Rays
- Waste Disposal, Fluid/methods
- Water Pollutants, Chemical/chemistry
- Water Pollutants, Chemical/metabolism
- Water Pollutants, Chemical/radiation effects
- Water Pollutants, Chemical/toxicity
- Water Purification/methods
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30
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Heterogeneous photocatalytic degradation of organic contaminants over titanium dioxide: A review of fundamentals, progress and problems. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2008. [DOI: 10.1016/j.jphotochemrev.2007.12.003] [Citation(s) in RCA: 2142] [Impact Index Per Article: 133.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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31
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Ballesteros Martín MM, Sánchez Pérez JA, Acién Fernández FG, Casas López JL, García-Ripoll AM, Arques A, Oller I, Malato Rodríguez S. Combined photo-Fenton and biological oxidation for pesticide degradation: effect of photo-treated intermediates on biodegradation kinetics. CHEMOSPHERE 2008; 70:1476-83. [PMID: 17904613 DOI: 10.1016/j.chemosphere.2007.08.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2007] [Revised: 08/14/2007] [Accepted: 08/16/2007] [Indexed: 05/17/2023]
Abstract
Biodegradability of a partially photo-oxidized pesticide mixture is demonstrated and the effect of photo-Fenton treatment time on growth and substrate consumption of the bacteria Pseudomonas putida CECT 324 is shown. Four commercial pesticides, laition, metasystox, sevnol and ultracid, usually employed in citric orchards in eastern Spain, were chosen for these experiments. The active ingredients are, respectively, dimethoate, oxydemeton-methyl, carbaryl and methidathion. Judging by biomass measurements, dissolved organic carbon measurements and biodegradation efficiency, it may be concluded that 90min<t(30W)<110min is the critical point for the photo-Fenton treatment. P. putida is sensitive to photo-produced intermediates giving rise to different kinetic behaviour: longer lag phases, slower growth rates and lower carbon uptake rates. Nonetheless, the percentage of carbon consumption was over 80%, pointing out the biodegradability of the mixture. Biodegradation efficiencies (E(f)) of the photo-reaction intermediates were around 60%, in small 50-ml cultures and in a 12-l bubble column bioreactor. But with the main difference that E(f) in the former took 120h and the same biodegradation was reached in less than 30h in the latter. Therefore, for qualitative results, experiments in flasks might be recommendable, but not for quantitative results for designing purposes.
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