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Wang T, Zhang J, Song Y, Liu Z, Ding H, Zhao C, Wang P. Role of micro-size zero valence iron as particle electrodes in a three-dimensional heterogeneous electro-ozonation process for nitrobenzene degradation. CHEMOSPHERE 2021; 276:130264. [PMID: 34088105 DOI: 10.1016/j.chemosphere.2021.130264] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/07/2021] [Accepted: 03/11/2021] [Indexed: 06/12/2023]
Abstract
A novel water treatment process (designated E-Fe0-O3 process) was constructed by combining electrolysis, micro-size zero valence iron (Fe0) and ozone in this study. Compared with other control processes, the combined process demonstrated a remarkable synergy, and it could obtain 90.5% of NB removal within 20 min. As for the mineralization experiment, the TOC removal efficiency for NB within 120 min was higher in the E-Fe0-O3 process, while the energy consumption was lower than the traditional E-O3 and E-Fe0 process. Interestingly, hydroxyl radicals (OH) acted as a key role for NB removal, and the concentration of OH in different processes were compared. Further study indicated OH, direct anode oxidation, direct ozonation, and zero valence iron catalysis were all responsible for nitrobenzene removal. Besides, the durability of Fe0 in the E-Fe0-O3 process was systematically evaluated by reusing Fe0 10 times. Notably, the electric field could protect micro-size zero valence iron from passivation for catalytic ozonation after the long-term reaction. Finally, other ozone-refractory organics pollutants were also investigated in the E-Fe0-O3 process, and the influence of various water matrices on NB removal was discussed. All results demonstrated that the E-Fe0-O3 process was an efficient method to remove refractory organic pollutants in various natural waters.
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Affiliation(s)
- Tuo Wang
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, People's Republic of China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University, Chongqing, 400045, People's Republic of China
| | - Jian Zhang
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, People's Republic of China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University, Chongqing, 400045, People's Republic of China; Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, 832003, People's Republic of China
| | - Yunqian Song
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, People's Republic of China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University, Chongqing, 400045, People's Republic of China
| | - Zhen Liu
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, People's Republic of China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University, Chongqing, 400045, People's Republic of China
| | - Haojie Ding
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, People's Republic of China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University, Chongqing, 400045, People's Republic of China
| | - Chun Zhao
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, People's Republic of China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University, Chongqing, 400045, People's Republic of China; Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, 832003, People's Republic of China.
| | - Pu Wang
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, People's Republic of China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Chongqing University, Chongqing, 400045, People's Republic of China.
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Olmez-Hanci T, Dogruel S, Emek ADA, Yılmazer CE, Çınar S, Kiraz O, Citil E, Orhon AK, Siltu E, Gucver SM, Ozgun OK, Tanik A, Yetis U. Performance of ozone and peroxone on the removal of endocrine disrupting chemicals (EDCs) coupled with cost analysis. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 82:640-650. [PMID: 32970617 DOI: 10.2166/wst.2020.339] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Micropollutants such as endocrine disruptors are one of the most important groups of chemicals polluting water resources. Conventional treatment systems may not be effective for the removal of endocrine disrupting chemicals (EDCs), and the fate of these chemicals should be carefully monitored in the effluent of wastewater treatment plants (WWTPs). Additional treatment methods such as advanced oxidation processes can be used for the removal of endocrine disruptors. This study presents the existence of endocrine disruptors in 4 different effluents: (i) municipal WWTP effluent, (ii) textile industry WWTP effluent, (iii) organized industrial zone (OIZ) WWTP effluent and (iv) pharmaceutical industry discharge and also presents their removal efficiencies by ozonation and peroxone oxidation. A broad spectrum of removal efficiencies was observed for the EDCs present in the samples since the oxidation efficiency of wastewaters containing EDCs mainly depends on the wastewater matrix and on the type of the EDCs. Ozonation was found to be a lower-cost option than peroxone oxidation at the investigated conditions.
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Affiliation(s)
- T Olmez-Hanci
- Civil Engineering Faculty, Environmental Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey E-mail:
| | - S Dogruel
- Civil Engineering Faculty, Environmental Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey E-mail:
| | - A D Allar Emek
- ITUNOVA Technology Inc., Istanbul Technical University, Ayazaga Campus, 34469, Maslak, Istanbul, Turkey
| | - C Eropak Yılmazer
- ITUNOVA Technology Inc., Istanbul Technical University, Ayazaga Campus, 34469, Maslak, Istanbul, Turkey
| | - S Çınar
- ITUNOVA Technology Inc., Istanbul Technical University, Ayazaga Campus, 34469, Maslak, Istanbul, Turkey
| | - O Kiraz
- ITUNOVA Technology Inc., Istanbul Technical University, Ayazaga Campus, 34469, Maslak, Istanbul, Turkey
| | - E Citil
- ITUNOVA Technology Inc., Istanbul Technical University, Ayazaga Campus, 34469, Maslak, Istanbul, Turkey
| | - A Koc Orhon
- General Directorate of Water Management, Republic of Turkey Ministry of Agriculture and Forestry, 06560, Yenimahalle, Ankara, Turkey
| | - E Siltu
- General Directorate of Water Management, Republic of Turkey Ministry of Agriculture and Forestry, 06560, Yenimahalle, Ankara, Turkey
| | - S M Gucver
- General Directorate of Water Management, Republic of Turkey Ministry of Agriculture and Forestry, 06560, Yenimahalle, Ankara, Turkey
| | - O Karahan Ozgun
- Civil Engineering Faculty, Environmental Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey E-mail:
| | - A Tanik
- Civil Engineering Faculty, Environmental Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey E-mail:
| | - U Yetis
- Environmental Engineering Department, Middle East Technical University, 06800 Çankaya, Ankara, Turkey
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Li H, Zhou B. Degradation of atrazine by catalytic ozonation in the presence of iron scraps: performance, transformation pathway, and acute toxicity. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2019; 54:432-440. [PMID: 30821587 DOI: 10.1080/03601234.2019.1574175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Degradation of atrazine by catalytic ozonation in the presence of iron scraps (ZVI/O3) was carried out. The key operational parameters (i.e., initial pH, ZVI dosage, and ozone dosage) were optimized by the batch experiments, respectively. This ZVI/O3 system exhibited much higher degradation efficiency of atrazine than the single ozonation, ZVI, and traditional ZVI/O2 systems. The result shows that the pseudo-first-order constant (0.0927 min-1) and TOC removal rate (86.6%) obtained by the ZVI/O3 process were much higher than those of the three control experiments. In addition, X-ray diffraction (XRD) analysis indicates that slight of γ-FeOOH and Fe2O3 were formed on the surface of iron scrap after ZVI/O3 treatment. These corrosion products exhibit high catalytic ability for ozone decomposition, which could generate more hydroxyl radical (HO•) to degrade atrazine. Six transformation intermediates were identified by liquid chromatography-mass spectrometry (LC-MS) analysis in ZVI/O3 system, and the degradation pathway of atrazine was proposed. Toxicity tests based on the inhibition of the luminescence emitted by Photobacterium phosphoreum and Vibrio fischeri indicate the detoxification of atrazine by ZVI/O3 system. Finally, reused experiments indicate the approving recyclability of iron scraps. Consequently, the ZVI/O3 system could be as an effective and promising technology for pesticide wastewater treatment.
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Affiliation(s)
- Haishen Li
- a School of Architecture and Environment , Sichuan University , Chengdu , China
| | - Bo Zhou
- a School of Architecture and Environment , Sichuan University , Chengdu , China
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Wen C, Xu X, Fan Y, Xiao C, Ma C. Pretreatment of water-based seed coating wastewater by combined coagulation and sponge-iron-catalyzed ozonation technology. CHEMOSPHERE 2018; 206:238-247. [PMID: 29753286 DOI: 10.1016/j.chemosphere.2018.04.172] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 04/24/2018] [Accepted: 04/28/2018] [Indexed: 06/08/2023]
Abstract
Coagulation-sedimentation combined with sponge iron/ozone (CS-SFe/O3) technology was applied to pretreat water-based seed coating wastewater (WSCW) from pesticide manufacturing. Coagulation with polyferric sulfate at a dosage of 1.5 g L-1 and a pH of 8.0 was effective, with color and chemical oxygen demand (COD) removal rates of 96.8 and 83.4%, respectively. SFe/O3 treatment further reduced the organic content in the effluents, especially concerning the degradation of aromatic pollutants, as demonstrated via ultraviolet-visible spectrophotometry (UV-vis), excitation-emission matrix (EEM) fluorescence spectrometry, and gas chromatography-mass spectrometry (GC/MS) analyses. The residual color and COD values of the effluent were 581.0 times and 640.0 mg L-1, respectively, under optimal conditions (ozone concentration of 0.48 mg L-1, SFe dosage of 20.0 g L-1, initial pH of 9.0, and reaction time of 30 min). Organic pollutants were also degraded by the high amounts of HO, which may have been generated via the transformation of ozone into HO on the SFe's surface and in the solution. Meanwhile, the biochemical oxygen demand (BOD5)/COD ratio of the WSCW increased, which indicates that the biodegradability improved significantly. The amount of iron leached from SFe particles was 4.5 mg L-1, which shows that the SFe catalyst has good stability. The operating cost of the combined CS-SFe/O3 technology was estimated at approximately 2.79 USD t-1. The results of this study suggest that the application of the combined CS-SFe/O3 technology in WSCW pretreatment can be beneficial for removing suspended solids, degrading recalcitrant pollutants, and enhancing biodegradability for the subsequent bioprocessing treatment.
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Affiliation(s)
- Chen Wen
- School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China; State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, PR China
| | - Xiaoyi Xu
- School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Yunshuang Fan
- School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China; State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, PR China
| | - Changfa Xiao
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, PR China
| | - Cong Ma
- School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China; State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, PR China.
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Xiong Z, Lai B, Yang P. Enhancing the efficiency of zero valent iron by electrolysis: Performance and reaction mechanism. CHEMOSPHERE 2018; 194:189-199. [PMID: 29207351 DOI: 10.1016/j.chemosphere.2017.11.167] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 11/21/2017] [Accepted: 11/28/2017] [Indexed: 06/07/2023]
Abstract
Electrolysis was applied to enhance the efficiency of micron-size zero valent iron (mFe0) and thereby promote p-nitrophenol (PNP) removal. The rate of PNP removal by mFe0 with electrolysis was determined in cylindrical electrolysis reactor that employed annular aluminum plate cathode as a function of experimental factors, including initial pH, mFe0 dosage and current density. The rate constants of PNP removal by Ele-mFe0 were 1.72-144.50-fold greater than those by pristine mFe0 under various tested conditions. The electrolysis-induced improvement could be primarily ascribed to stimulated mFe0 corrosion, as evidenced by Fe2+ release. The application of electrolysis could extend the working pH range of mFe0 from 3.0 to 6.0 to 3.0-10.0 for PNP removal. Additionally, intermediates analysis and scavengers experiments unraveled the reduction capacity of mFe0 was accelerated in the presence of electrolysis instead of oxidation. Moreover, the electrolysis effect could also delay passivation of mFe0 under acidic condition, as evidenced by SEM-EDS, XRD, and XPS analysis after long-term operation. This is mainly due to increased electromigration meaning that iron corrosion products (iron hydroxides and oxides) are not primarily formed in the vicinity of the mFe0 or at its surface. In the presence of electrolysis, the effect of electric field significantly promoted the efficiency of electromigration, thereby enhanced mFe0 corrosion and eventually accelerated the PNP removal rates.
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Affiliation(s)
- Zhaokun Xiong
- Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Bo Lai
- Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China.
| | - Ping Yang
- Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China
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Li X, Chen W, Ma L, Wang H, Fan J. Industrial wastewater advanced treatment via catalytic ozonation with an Fe-based catalyst. CHEMOSPHERE 2018; 195:336-343. [PMID: 29272802 DOI: 10.1016/j.chemosphere.2017.12.080] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 12/11/2017] [Accepted: 12/12/2017] [Indexed: 06/07/2023]
Abstract
An Fe-based catalyst was used as a heterogeneous catalyst for the ozonation of industrial wastewater, and key operational parameters (pH and catalyst dosage) were studied. The results indicated that the Fe-based catalyst significantly improved the mineralization of organic pollutants in wastewater. TOC (total organic carbon) removal was high, at 78.7%, with a catalyst concentration of 200 g/L, but only 31.6% with ozonation alone. The Fe-based catalyst significantly promoted ozone decomposition by 70% in aqueous solution. Hydroxyl radicals (·OH) were confirmed to be existed directly via EPR (electron paramagnetic resonance) experiments, and ·OH were verified to account for about 34.4% of TOC removal with NaHCO3 as a radical scavenger. Through characterization by SEM-EDS (field emission scanning electron microscope with energy-dispersive spectrometer), XRD (X-ray powder diffraction) and XPS (X-ray photoelectron spectroscopy), it was deduced that FeOOH on the surface of the catalyst was the dominant contributor to the catalytic efficiency. The catalyst was certified as having good stability and excellent reusability based on 50 successive operations and could be used as a filler simultaneously. Thereby, it is a promising catalyst for practical industrial wastewater advanced treatment.
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Affiliation(s)
- Xufang Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Weiyu Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Luming Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
| | - Hongwu Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Jinhong Fan
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Nangjing University & Yancheng Academy of Environmental Protection Technology and Engineering, Yancheng, Jiangsu Province, 224000, China
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Xiong Z, Cao J, Yang D, Lai B, Yang P. Coagulation-flocculation as pre-treatment for micro-scale Fe/Cu/O 3 process (CF-mFe/Cu/O 3) treatment of the coating wastewater from automobile manufacturing. CHEMOSPHERE 2017; 166:343-351. [PMID: 27700998 DOI: 10.1016/j.chemosphere.2016.09.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 09/09/2016] [Accepted: 09/10/2016] [Indexed: 06/06/2023]
Abstract
A coagulation-flocculation as pre-treatment combined with mFe/Cu/O3 (CF-mFe/Cu/O3) process was developed to degrade the pollutants in automobile coating wastewater (ACW). In coagulation-flocculation (CF) process, high turbidity removal efficiency (97.1%) and low COD removal efficiency (10.5%) were obtained under the optimal conditions using Al2(SO4)3·18H2O and CaO. The effluent of CF process (ECF) was further disposed by mFe/Cu/O3 process, and its key operating parameters were optimized by batch experiments. Optimally, COD removal efficiency of ECF obtained by the mFe/Cu/O3 process (i.e., 87.6% after 30 min treatment) was much higher than those of mFe/Cu alone (8.3%), ozone alone (46.6%), and mFe/Cu/air (6.1%), which confirms the superiority of the mFe/Cu/O3 process. In addition, the analysis results of UV-vis, excitation-emission matrix (EEM) fluorescence spectra and GC/MS further confirm that the phenol pollutants of ECF had been effectively decomposed or transformed after CF-mFe/Cu/O3 process treatment. Meanwhile, B/C ratio of ACW increased from 0.19 to 0.56, which suggests the biodegradability was improved significantly. Finally, the operating cost of CF-mFe/Cu/O3 process was about 1.83 USD t-1 for ACW treatment. Therefore, the combined process is a promising treatment technology for the coating wastewater from automobile manufacturing.
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Affiliation(s)
- Zhaokun Xiong
- Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Jinyan Cao
- Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Dan Yang
- Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Bo Lai
- Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China.
| | - Ping Yang
- Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China
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