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Liu Q, Li X, Wu M, Huang H, Chen Y. N 2O recovery from wastewater and flue gas via microbial denitrification: Processes and mechanisms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 946:174231. [PMID: 38917909 DOI: 10.1016/j.scitotenv.2024.174231] [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: 04/08/2024] [Revised: 06/06/2024] [Accepted: 06/21/2024] [Indexed: 06/27/2024]
Abstract
Nitrous oxide (N2O) is increasingly regarded as a significant greenhouse gas implicated in global warming and the depletion of the ozone layer, yet it is also recognized as a valuable resource. This paper comprehensively reviews innovative microbial denitrification techniques for recovering N2O from nitrogenous wastewater and flue gas. Critical analysis is carried out on cutting-edge processes such as the coupled aerobic-anoxic nitrous decomposition operation (CANDO) process, semi-artificial photosynthesis, and the selective utilization of microbial strains, as well as flue gas absorption coupled with heterotrophic/autotrophic denitrification. These processes are highlighted for their potential to facilitate denitrification and enhance the recovery rate of N2O. The review integrates feasible methods for process control and optimization, and presents the underlying mechanisms for N2O recovery through denitrification, primarily achieved by suppressing nitrous oxide reductase (Nos) activity and intensifying competition for electron donors. The paper concludes by recognizing the shortcomings in existing technologies and proposing future research directions, with an emphasis on prioritizing the collection and utilization of N2O while considering environmental sustainability and economic feasibility. Through this review, we aim to inspire interest in the recovery and utilization of N2O, as well as the development and application of related technologies.
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Affiliation(s)
- Qimeng Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Xinyi Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Meirou Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Haining Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China; The Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai, China.
| | - Yinguang Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
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2
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Li S, Peng X, Zheng D, Fan S, Li D. Improving the electrochemical characteristics and performance of a neutral all-iron flow battery by using the iron reduction bacteria. Bioelectrochemistry 2024; 157:108660. [PMID: 38301292 DOI: 10.1016/j.bioelechem.2024.108660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 01/22/2024] [Accepted: 01/24/2024] [Indexed: 02/03/2024]
Abstract
At present, the all-iron redox flow batteries (RFBs) have greater application potential due to high accessibility of electrolytes compared to traditional RFBs. Meanwhile, although electroactive bacteria can accelerate the electrons transfer, their potential to improve the performance of RFBs has been overlooked. Previously, we had confirmed that ferrous-oxidizing bacteria (FeOB) could enhance the performance of an all-iron RFB, therefore we conducted several batch experiments and chronopotentiometry experiments by using the ferric-reducing bacteria (FeRB) or mixed culture (FeOB and FeRB) to demonstrate whether they have the same or stronger effects on Fe3+-DTPA/Na4[Fe(CN)6] RFB. The results showed that the experimental reactors could achieve higher charging current density and initial cathodic potential during constant voltage charging process. The electrochemical impedance spectroscopy data and cyclic voltammetry curves demonstrated that the polarization impedance increased slower and reduction peak potential of experimental groups also emerged a positive shift compared to CK. According to chronopotentiometry experiments results, the microbes could function at maximum 0.3 M, 12 mA/cm2, and also improved the charging specific capacity. Combined the SEM pictures and microbial composition analysis, the main functional electroactive FeRB were Alcaligenes, Corynebacterium and Bacillus, which indicated to have important potential in improving the performance of RFBs.
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Affiliation(s)
- Sitao Li
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xinyuan Peng
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China; Collage of Life Sciences, Sichuan University, Chengdu 610041, China
| | - Decong Zheng
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Sen Fan
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China; Collage of Life Sciences, Sichuan University, Chengdu 610041, China
| | - Daping Li
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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3
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He H, Shi M, Yang X, Zhan J, Lin Y, Guo Z, Liao Z, Lai C, Ren X, Huang B, Pan X. Dissolved organic matter accelerates microbial degradation of 17 alpha-ethinylestradiol in the presence of iron mineral. J Environ Sci (China) 2024; 139:364-376. [PMID: 38105062 DOI: 10.1016/j.jes.2023.05.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 05/30/2023] [Accepted: 05/30/2023] [Indexed: 12/19/2023]
Abstract
Dissolved organic matter (DOM) and iron minerals widely existing in the natural aquatic environment can mediate the migration and transformation of organic pollutants. However, the mechanism of interaction between DOM and iron minerals in the microbial degradation of pollutants deserves further investigation. In this study, the mechanism of 17 alpha-ethinylestradiol (EE2) biodegradation mediated by humic acid (HA) and three kinds of iron minerals (goethite, magnetite, and pyrite) was investigated. The results found that HA and iron minerals significantly accelerated the biodegradation process of EE2, and the highest degradation efficiency of EE2 (48%) was observed in the HA-mediated microbial system with pyrite under aerobic conditions. Furthermore, it had been demonstrated that hydroxyl radicals (HO•) was the main active substance responsible for the microbial degradation of EE2. HO• is primarily generated through the reaction between hydrogen peroxide secreted by microorganisms and Fe(II), with aerobic conditions being more conducive. The presence of iron minerals and HA could change the microbial communities in the EE2 biodegradation system. These findings provide new information for exploring the migration and transformation of pollutants by microorganisms in iron-rich environments.
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Affiliation(s)
- Huan He
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Min Shi
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Xiaoxia Yang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Juhong Zhan
- Research Institute for Environmental Innovation (Suzhou) Tsinghua, Suzhou 215163, China.
| | - Yanting Lin
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Ziwei Guo
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Zhicheng Liao
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Chaochao Lai
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Xiaomin Ren
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Bin Huang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Kunming 650500, China.
| | - Xuejun Pan
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Kunming 650500, China
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Chen R, Li J, Wang J, Yang W, Shen S, Dong F. Continuous NO Upcycling into Ammonia Promoted by SO 2 in Flue Gas: Poison Can Be a Gift. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:12127-12134. [PMID: 37531586 DOI: 10.1021/acs.est.3c04192] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
Although ammonia (NH3) synthesis efficiency from the NO reduction reaction (NORR) is significantly promoted in recent years, one should note that NO is one of the major air pollutants in the flue gas. The limited NO conversion ratio is still the key challenge for the sustainable development of the NORR route, which potentially contributes more to contaminant emissions rather than its upcycling. Herein, we provide a simple but effective approach for continuous NO reduction into NH3, promoted by coexisting SO2 poison as a gift in the flue gas. It is significant to discover that SO2 plays a decisive role in elevating the capacity of NO absorption and reduction. A unique redox pair of SO2-NO is constructed, which contributes to the exceptionally high conversion ratio for both NO (97.59 ± 1.42%) and SO2 (99.24 ± 0.49%) in a continuous flow. The ultrahigh selectivity for both NO-to-NH3 upcycling (97.14 ± 0.55%) and SO2-to-SO42- purification (92.44 ± 0.71%) is achieved synchronously, demonstrating strong practicability for the value-added conversion of air contaminants. The molecular mechanism is revealed by comprehensive in situ technologies to identify the essential contribution of SO2 to NO upcycling. Besides, realistic practicality is realized by the efficient product recovery and resistance ability against various poisoning effects. The proposed strategy in this work not only achieves a milestone efficiency for NH3 synthesis from the NORR but also raises great concerns about contaminant resourcing in realistic conditions.
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Affiliation(s)
- Ruimin Chen
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, People's Republic of China
| | - Jieyuan Li
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, People's Republic of China
| | - Jielin Wang
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, People's Republic of China
| | - Weiping Yang
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, People's Republic of China
| | - Shujie Shen
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, People's Republic of China
| | - Fan Dong
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, People's Republic of China
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Li J, Wang J, Shen S, Chen R, Liu M, Dong F. Beyond Purification: Highly Efficient and Selective Conversion of NO into Ammonia by Coupling Continuous Absorption and Photoreduction under Ambient Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:5445-5452. [PMID: 36942694 DOI: 10.1021/acs.est.2c09669] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Although the selective catalytic reduction technology has been confirmed to be effective for nitrogen oxide (NOx) removal, green and sustainable NOx re-utilization under ambient conditions is still a great challenge. Herein, we develop an on-site system by coupling the continuous chemical absorption and photocatalytic reduction of NO in simulated flue gas (CNO = 500 ppm, GHSV = 18,000 h-1), which accomplishes an exceptional NO conversion into value-added ammonia with competitive conversion efficiency (89.05 ± 0.71%), ammonia production selectivity (95.58 ± 0.95%), and ammonia recovery efficiency (>90%) under ambient conditions. The anti-poisoning capacities, including the resistance against factors of H2O, SO2, and alkali/alkaline/heavy metals, are also achieved, which presents strong environmental practicability for treating NOx in flue gas. In addition, the critical roles of corresponding chemical absorption and catalytic reduction components are also revealed by in situ characterizations. The emerging strategy herein not only achieves a milestone efficiency for sustainable NO purification but also opens a new route for contaminant resourcing in the near future of carbon neutrality.
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Affiliation(s)
- Jieyuan Li
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Jielin Wang
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Shujie Shen
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Ruimin Chen
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Min Liu
- Hunan Joint International Research Center for Carbon Dioxide Resource Utilization, State Key Laboratory of Powder Metallurgy, School of Physical and Electronics, Central South University, Changsha 410083, China
| | - Fan Dong
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
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Wang Y, Gong Z, Xu X, Chen P, Zhao T, Hu W, Xu M, Li J, Huang S. Effects of various COD/NO ratios on NOx removal performance and microbial communities in a BTF-ABR integrated system. CHEMOSPHERE 2023; 321:138121. [PMID: 36775032 DOI: 10.1016/j.chemosphere.2023.138121] [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: 12/10/2022] [Revised: 02/05/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
In this study, we investigated the removal performance of NOx and stability of the biotrickling filter-anaerobic baffled reactor (BTF-ABR) integrated system at various chemical oxygen demand (COD)/NO ratios (12.18, 6.71, and 4.63 in stages 1, 2, and 3, respectively) under 3.5% O2 and 50 ± 0.5 °C conditions for the first time. The results showed that the maximum elimination capacity of NOx was 4.46, 8.16, and 11.58 g/(m3·h) in stages 1, 2, and 3, respectively. The minimum operating cost in terms of glucose was 4.79 g of glucose/g of NO. However, a COD/NO ratio of 12.18 resulted in a wastage of carbon sources, while a COD/NO ratio of 4.63 led to about 20 mg/m3 N2O emission at the end of the study. Highly bacteria diversity and positive co-occurrence networks at the COD/NO ratio of 6.71 were the main reasons for no intermediate accumulation or N2O emission. Analysis of real-time polymerase chain reaction (PCR) indicated that nirS and norB were more sensitive to the changes in the COD/NO ratios than other denitrifying genes, and the denitrifiers with nirS filled more ecological niches as the NOx increased. Furthermore, although the decrease in COD/NO ratio significantly impacted the microbial community structure, the NOx RE was stabilized at over 90% because the micro-aerobic environment produced by ABR combined highly diverse microbes and functions in BTF, as well as the coordinated expression of denitrifying genes. Achieving efficient, stable, and low-cost denitrification is feasible in this BTF-ABR integrated system.
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Affiliation(s)
- Yanling Wang
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China; School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, China.
| | - Zerui Gong
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, China.
| | - Xinyue Xu
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, China.
| | - Pengfei Chen
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, China.
| | - Tianyu Zhao
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, China.
| | - Wenzhe Hu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China.
| | - Meiying Xu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China.
| | - Jianjun Li
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China; School of Life Sciences and Engineering, Foshan University, Foshan, 528225, China.
| | - Shaobin Huang
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, China.
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Cubides D, Guimerà X, Jubany I, Gamisans X. A review: Biological technologies for nitrogen monoxide abatement. CHEMOSPHERE 2023; 311:137147. [PMID: 36347354 DOI: 10.1016/j.chemosphere.2022.137147] [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: 05/30/2022] [Revised: 10/18/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
Nitrogen oxides (NOx), including nitrogen monoxide (NO) and nitrogen dioxide (NO2), are among the most important global atmospheric pollutants because they have a negative impact on human respiratory health, animals, and the environment through the greenhouse effect and ozone layer destruction. NOx compounds are predominantly generated by anthropogenic activities, which involve combustion processes such as energy production, transportation, and industrial activities. The most widely used alternatives for NOx abatement on an industrial scale are selective catalytic and non-catalytic reductions; however, these alternatives have high costs when treating large air flows with low pollutant concentrations, and most of these methods generate residues that require further treatment. Therefore, biotechnologies that are normally used for wastewater treatment (based on nitrification, denitrification, anammox, microalgae, and combinations of these) are being investigated for flue gas treatment. Most of such investigations have focused on chemical absorption and biological reduction (CABR) systems using different equipment configurations, such as biofilters, rotating reactors, or membrane reactors. This review summarizes the current state of these biotechnologies available for NOx treatment, discusses and compares the use of different microorganisms, and analyzes the experimental performance of bioreactors used for NOx emission control, both at the laboratory scale and in industrial settings, to provide an overview of proven technical solutions and biotechnologies for NOx treatment. Additionally, a comparative assessment of the advantages and disadvantages is performed, and special challenges for biological technologies for NO abatement are presented.
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Affiliation(s)
- David Cubides
- Department of Mining, Industrial and ICT Engineering (EMIT), Biological Treatment of Gaseous Pollutants and Odours Group (BIOGAP), Manresa School of Engineering (EPSEM), Universitat Politècnica de Catalunya (UPC), Av. Bases de Manresa 61-73, 08242 Manresa, Spain; Eurecat, Centre Tecnològic de Catalunya, Sustainability Area, Plaça de la Ciència, 2, Manresa 08242, Spain
| | - Xavier Guimerà
- Department of Mining, Industrial and ICT Engineering (EMIT), Biological Treatment of Gaseous Pollutants and Odours Group (BIOGAP), Manresa School of Engineering (EPSEM), Universitat Politècnica de Catalunya (UPC), Av. Bases de Manresa 61-73, 08242 Manresa, Spain.
| | - Irene Jubany
- Eurecat, Centre Tecnològic de Catalunya, Sustainability Area, Plaça de la Ciència, 2, Manresa 08242, Spain
| | - Xavier Gamisans
- Department of Mining, Industrial and ICT Engineering (EMIT), Biological Treatment of Gaseous Pollutants and Odours Group (BIOGAP), Manresa School of Engineering (EPSEM), Universitat Politècnica de Catalunya (UPC), Av. Bases de Manresa 61-73, 08242 Manresa, Spain
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Du T, Ren L, Zhang Y, Cui M, Chao Y, Ge Y, Liu N, An Y, Meng C. Removal of nitrogen oxides under visible light irradiation by copper phthalocyanine/MOR zeolite composite. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128587] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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Xu XJ, Wu YN, Xiao QY, Xie P, Ren NQ, Yuan YX, Lee DJ, Chen C. Simultaneous removal of NO X and SO 2 from flue gas in an integrated FGD-CABR system by sulfur cycling-mediated Fe(II)EDTA regeneration. ENVIRONMENTAL RESEARCH 2022; 205:112541. [PMID: 34915032 DOI: 10.1016/j.envres.2021.112541] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/29/2021] [Accepted: 12/05/2021] [Indexed: 06/14/2023]
Abstract
Chemical absorption-biological reduction (CABR) process is an attractive method for NOX removal and Fe(II)EDTA regeneration is important to sustain high NOX removal. In this study a sustainable and eco-friendly sulfur cycling-mediated Fe(II)EDTA regeneration method was incorporated in the integrated biological flue gas desulfurization (FGD)-CABR system. Here, we investigated the NOX and SO2 removal efficiency of the system under three different flue gas flows (100 mL/min, 500 mL/min, and 1000 mL/min) and evaluated the feasibility of chemical Fe(III)EDTA reduction by sulfide in series of batch tests. Our results showed that complete SO2 removal was achieved at all the tested scenarios with sulfide, thiosulfate and S0 accumulation in the solution. Meanwhile, the total removal efficiency of NOX achieved ∼100% in the system, of which 3.2%-23.3% was removed in spray scrubber and 76.7%-96.5% in EGSB reactor along with no N2O emission. The optimal pH and S2-/Fe(III)EDTA for Fe(II)EDTA regeneration and S0 recovery was 8.0 and 1:2. The microbial community analysis results showed that the cooperation of heterotrophic denitrifier (Saprospiraceae_uncultured and Dechloromonas) and iron-reducing bacteria (Klebsiella and Petrimonas) in EGSB reactor and sulfide-oxidizing, nitrate-reducing bacteria (Azoarcus and Pseudarcobacter) in spray scrubber contributed to the efficient removal of NOX in flue gas.
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Affiliation(s)
- Xi-Jun Xu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Yi-Ning Wu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China.
| | - Qing-Yang Xiao
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Peng Xie
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Yi-Xing Yuan
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei, 106, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, 106, Taiwan
| | - Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China.
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10
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Wu L, Wang LK, Wei W, Ni BJ. Autotrophic denitrification of NO for effectively recovering N 2O through using thiosulfate as sole electron donor. BIORESOURCE TECHNOLOGY 2022; 347:126681. [PMID: 34999195 DOI: 10.1016/j.biortech.2022.126681] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/29/2021] [Accepted: 01/01/2022] [Indexed: 06/14/2023]
Abstract
To reclaim nitrous oxide (N2O) as an energy resource economically, this study developed an autotrophic denitrification-based system with thiosulfate (S2O32-) and nitric oxide (NO) as electron donor and acceptor, respectively. NO from flue gases is absorbed on Fe(II)EDTA to overcome its low solubility in liquid phase by forming Fe(II)EDTA-NO. Short-term batch tests and long-term continuous experiments were conducted to investigate the N2O production profile and NO conversion efficiency from thiosulfate-based denitrification under varied Fe (II)EDTA-NO conditions (5-20 mM). Up to 39% of NO was converted to gaseous N2O at 20 mM Fe(II)EDTA-NO amid batch test due to the inhibition of key enzymatic activities by NO and the acidic conditions following thiosulfate oxidation. Higher Fe(II)EDTA-NO levels induced lower enzymatic activities with N2OR being suppressed harder than NOR. Microbial diversity was reduced in the continuous thiosulfate-driven Fe(II)EDTA-NO-based denitrification system. NO-resistant bacteria and sulfide-tolerant denitrifiers were enriched, facilitating NO conversion to N2O thereafter.
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Affiliation(s)
- Lan Wu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Li-Kun Wang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | - Wei Wei
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Bing-Jie Ni
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia.
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Wang Y, Li J, Huang S, Huang X, Hu W, Pu J, Xu M. Evaluation of NOx removal from flue gas and Fe(II)EDTA regeneration using a novel BTF-ABR integrated system. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125741. [PMID: 34088200 DOI: 10.1016/j.jhazmat.2021.125741] [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: 12/29/2020] [Revised: 03/22/2021] [Accepted: 03/22/2021] [Indexed: 06/12/2023]
Abstract
A promising process is under development for the removal of NOx and regeneration of Fe(II)EDTA in a novel biotrickling filter-anaerobic baffled reactor (BTF-ABR) integrated system at 50 ± 0.5 ℃. In this work, we investigated the NOx removal capacity of a BTF under different O2 concentrations (7.0 vol%, 5.25 vol% and 3.5 vol%), and tested the effect of an ABR on NOx removal and regeneration of Fe(II)EDTA. The results showed that the NOx removal capacity was significantly increased with the O2 concentration reduced from 7.0% to 3.5%. The microoxygen environment produced by the BTF-ABR integrated system was more conducive to the removal of NOx and regeneration of Fe(II)EDTA compared with that in the BTF. Real-time polymerase chain reaction (PCR) analysis showed that the coordinated expression of denitrification genes was the major reason for no N2O emission, along with no nitrate and nitrite accumulation. The 16S rRNA gene amplicon sequencing analysis showed that the cooperation of denitrifying bacteria (Klebsiella, Petrimonas, Rhodococcus and Ochrobactium) and iron-reducing bacteria (Klebsiella, Geobacter and Petrimonas) in the system was the key to the stable and efficient removal of NOx and the regeneration of Fe(II)EDTA simultaneously.
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Affiliation(s)
- Yanling Wang
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510006, PR China.
| | - Jianjun Li
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510006, PR China.
| | - Shaobin Huang
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China.
| | - Xingzhu Huang
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510006, PR China.
| | - Wenzhe Hu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510006, PR China.
| | - Jia Pu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510006, PR China.
| | - Meiying Xu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510006, PR China.
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12
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Yang J, Liu S, Fu Q, Li-Chao N, Chen L. Hydrochloric Acid‐Assisted Regeneration of Cobalt Ethylenediamine for NO
x
Remediation in Flue Gas. Chem Eng Technol 2021. [DOI: 10.1002/ceat.202100129] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jie Yang
- Chengdu University of Information Technology College of Resources and Environment 610225 Chengdu Sichuan China
| | - Shengyu Liu
- Chengdu University of Information Technology College of Resources and Environment 610225 Chengdu Sichuan China
| | - Qianwen Fu
- Chengdu University of Information Technology College of Resources and Environment 610225 Chengdu Sichuan China
| | - Nengzi Li-Chao
- Xichang University Academy of Economics and Environmental Sciences 615013 Xichang Sichuan China
| | - Li Chen
- Chengdu University of Information Technology College of Resources and Environment 610225 Chengdu Sichuan China
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13
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Yang JR, Wang Y, Chen H, Ren RP, Lv YK. A new approach for the effective removal of NO x from flue gas by using an integrated system of oxidation-absorption-biological reduction. JOURNAL OF HAZARDOUS MATERIALS 2021; 404:124109. [PMID: 33049641 DOI: 10.1016/j.jhazmat.2020.124109] [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: 07/16/2020] [Revised: 09/03/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
A new process of NOx removal from flue gas, using an integrated system of oxidation-absorption-biological reduction (OABR), is introduced. The experimental results show that increasing the NOx oxidation ratio in flue gas can effectively improve the NOx removal efficiency of the OABR system. The NOx removal efficiency could reach 98.8% with 0.02 M NaHCO3 as the chemical absorbent and under the condition of the optimal NOx oxidation ratio of 50%. During stable operation, the OABR system could maintain a high NOx removal efficiency (above 94%) under the following conditions: 1-8 vol% (104-8 × 104 ppmv) O2, 200-800 ppmv NOx, 0.5-1.5 L/min gas flow rate and 100-800 ppmv SO2. The nitrogen equilibrium results showed that about 59% of the nitrogen in the inlet NOx were transformed to N2 through microbial denitrification, 37% of the nitrogen were converted to biological nitrogen for microbial growth, and only 1.1% of the nitrogen remained in the liquid phase. This new approach has an excellent NOx removal performance and great potential for industrial application.
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Affiliation(s)
- Jing-Rui Yang
- Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Ying Wang
- Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Hu Chen
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Rui-Peng Ren
- Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Yong-Kang Lv
- Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China.
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14
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Liu N, Li YY, Ouyang DJ, Guo R, Chen R, Li W, Li JX, Zhao JH. Study on NO x removal from simulated flue gas by an electrobiofilm reactor: EDTA-ferrous regeneration and biological kinetics mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:2860-2870. [PMID: 32894445 DOI: 10.1007/s11356-020-10617-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
The regeneration of EDTA-FeII is a key step in electrobiofilm reduction-integrated systems for NOx removal from industrial boiler flue gas. The current and carbon sources are proposed to be the two crucial electron donors for EDTA-FeII regeneration. These parameters strongly influence the reactivity of EDTA-FeII-generated products in the system. Therefore, their effects on EDTA-FeII-NO and EDTA-FeIII reduction and the EDTA-FeII generation mechanism were studied. The results showed that the electrobiofilm method has obvious advantages over biological or electrochemical methods used alone for EDTA-FeII regeneration. Under the optimal conditions at a current of 22.9A m-3 net cathode chamber, the rate of EDTA-FeII regeneration reached 98.35%. The glucose concentration is the primary factor influencing the reduction of both EDTA-FeII-NO and EDTA-FeIII, while the current significantly promotes both processes. Comparison of the Km values of the two substrates indicated that microbial activity was crucial to the reduction of EDTA-FeII-NO, but the biological reduction of EDTA-FeIII had a competitive influence on EDTA-FeII-NO reduction, which limited the abundance and effectiveness of the bacteria responsible for EDTA-FeII-NO reduction in the electrobiofilm system.
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Affiliation(s)
- Nan Liu
- China Key Laboratory of Light Industry Pollution Control and Recycling, Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Ying-Ying Li
- China Key Laboratory of Light Industry Pollution Control and Recycling, Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Du-Juan Ouyang
- China Key Laboratory of Light Industry Pollution Control and Recycling, Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Rui Guo
- Solid Waste and Chemicals Management Center, Ministry of Ecology and Environment of the People's Republic of China, Beijing, 100029, People's Republic of China
| | - Run Chen
- China Key Laboratory of Light Industry Pollution Control and Recycling, Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Wei Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, Hangzhou, 310027, People's Republic of China.
| | - Ji-Xiang Li
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, People's Republic of China.
- University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
| | - Ji-Hong Zhao
- Henan Radio & Television University, Zhengzhou, 450001, People's Republic of China
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15
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He F, Zhu X, Chen X, Ding J. Performance, optimization, and mechanism of nitric oxide removal by thiourea dioxide/FeIIEDTA reaction systems. Chin J Chem Eng 2020. [DOI: 10.1016/j.cjche.2020.06.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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16
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He F, Zhu X, Chen X, Ding J. Evaluation of Fe
II
EDTA‐NO reduction by thiourea dioxide in NO removal with Fe
II
EDTA. ASIA-PAC J CHEM ENG 2019. [DOI: 10.1002/apj.2397] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Feiqiang He
- State Key Laboratory for Nuclear Resources and Environment, School of Chemistry, Biology and Materials ScienceEast China University of Technology Nanchang China
| | - Xinyu Zhu
- State Key Laboratory for Nuclear Resources and Environment, School of Chemistry, Biology and Materials ScienceEast China University of Technology Nanchang China
| | - Xianchun Chen
- State Key Laboratory for Nuclear Resources and Environment, School of Chemistry, Biology and Materials ScienceEast China University of Technology Nanchang China
| | - Jianhua Ding
- State Key Laboratory for Nuclear Resources and Environment, School of Chemistry, Biology and Materials ScienceEast China University of Technology Nanchang China
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17
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Chen J, He J, Wang X, Hrynsphan D, Wu J, Chen J, Yao J. Reduction of Fe II(EDTA)-NO by Mn powder in wet flue gas denitrification technology: stoichiometry, kinetics, and thermodynamics. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:36933-36941. [PMID: 31745767 DOI: 10.1007/s11356-019-06901-5] [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] [Received: 08/16/2019] [Accepted: 10/28/2019] [Indexed: 06/10/2023]
Abstract
Conversion of FeII(EDTA)-NO or FeIII(EDTA) into FeII(EDTA) is a key process in a wet flue gas denitrification technology with FeII(EDTA) solution. In this work, the stoichiometry, kinetics, and thermodynamics of FeII(EDTA)-NO reduction by Mn powder were investigated. We first studied the FeII(EDTA)-NO reduction and product distribution to speculate a possible stoichiometry of FeII(EDTA)-NO reduction by Mn powder. Then, the effects of major influencing factors, such as pH value, temperature, and Mn concentration, were studied. The pseudo-second-order model was established to describe the FeII(EDTA)-NO reduction. Simultaneously, according to Arrhenius and Eyring-Polanyi equations, the reaction activation energy (Ea), enthalpy of activation (∆H‡), and entropy of activation (∆S‡) were calculated as 23.68 kJ/mol, 21.148 kJ/mol, and - 149.728 J/(k mol), respectively. Additionally, simultaneous reduction of FeIII(EDTA) and FeII(EDTA)-NO was investigated to better study the mechanism of FeII(EDTA) regeneration, suggesting that there was a competition between the two reduction processes. Finally, a simple schematic mechanism of NO absorption by FeII(EDTA) combined with regeneration of manganese ion and ammonium was proposed. These fundamental researches could offer a valuable guidance for wet flue gas denitrification technology with FeII(EDTA) solution.
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Affiliation(s)
- Jun Chen
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou, 310015, China
| | - Jinjia He
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Xiaoping Wang
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Dzmitry Hrynsphan
- Research Institute of Physical and Chemical Problems, Belarusian State University, 220030, Minsk, Belarus
| | - Jiali Wu
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Jianmeng Chen
- College of Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Jiachao Yao
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou, 310015, China.
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18
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Guo T, Zhang C, Zhao J, Ma C, Li S, Li W. Evaluation of polypyrrole-modified bioelectrodes in a chemical absorption-bioelectrochemical reduction integrated system for NO removal. Sci Rep 2019; 9:13030. [PMID: 31506560 PMCID: PMC6737099 DOI: 10.1038/s41598-019-49610-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 08/28/2019] [Indexed: 11/09/2022] Open
Abstract
A Chemical absorption-bioelectrochemical reduction (CABER) system is based on Chemical absorption-biological reduction (CABR) system, which aims at NO removal and has been studied in many of our previous works. In this paper, we applied polypyrrole (PPy) on the electrode of bioelectrochemical reactor (BER) of CABER system, which induced a much higher current density in the cyclic voltammetry (CV) curve for the electrode itself and better NO removal rate in the system. In addition, a Microbial Electrolysis Cell (MEC) is constructed to study its strengthening mechanism. Results shows that PPy-MEC has a greater Faraday efficiency and higher reduction rate of Fe(III)EDTA and Fe(II)EDTA-NO in the solution when compared to original Carbon MEC, which confirms the advantage of PPy-modified electrode(s) in the CABER system. The results of this study are reported for illustration of potential of CABER technology and design of low-cost high-efficiency NOx control equipment in the future.
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Affiliation(s)
- Tianjiao Guo
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
| | - Chunyan Zhang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
| | - Jingkai Zhao
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China
| | - Cunhao Ma
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
| | - Sujing Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
| | - Wei Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China.
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19
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Sharif HMA, Cheng HY, Haider MR, Khan K, Yang L, Wang AJ. NO Removal with Efficient Recovery of N 2O by Using Recyclable Fe 3O 4@EDTA@Fe(II) Complex: A Novel Approach toward Resource Recovery from Flue Gas. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:1004-1013. [PMID: 30525505 DOI: 10.1021/acs.est.8b03934] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Traditional technologies for handling nitrogen oxides (NO x) from flue gas commonly entail the formation of harmless nitrogen gas (N2), while less effort has been made to recover the N-containing chemicals produced. In this work, we developed a novel nanomagnetic adsorbent, Fe3O4@EDTA@Fe(II) (MEFe(II)), for NO removal. The NO adsorbed by MEFe(II) was then selectively converted to N2O, a valuable compound in many industries, by using sulfite (a product from desulfurization in flue gas treatment) as the reductant for the regeneration of MEFe(II). Because of the magnetic and solid properties of MEFe(II), the processes of NO adsorption and N2O recovery can be readily carried out under their optimal pH conditions in separate systems. In addition, the produced N2O is easily handled without unwanted release to the atmosphere. At the optimal pH (7.5 and 8.0 for NO adsorption and N2O recovery, respectively), the maximum NO adsorption capacity of MEFe(II) was measured as 0.303 ± 0.037 mmol·g-1, over 90% of which was converted to N2O during the recovery process. Moreover, MEFe(II) exhibited good five consecutive cycles. All of above reactions were performed at room temperature. These findings indicate MEFe(II) may hold great potential for application to NO removal from flue gas with the benefits of resource recovery, decreased chemical use, and low energy consumption.
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Affiliation(s)
- Hafiz Muhammad Adeel Sharif
- Key Laboratory of Environmental Biotechnology , Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing , 100085 , PR China
- University of Chinese Academy of Sciences , Beijing , 100049 , China
| | - Hao-Yi Cheng
- University of Chinese Academy of Sciences , Beijing , 100049 , China
| | - Muhammad Rizwan Haider
- Key Laboratory of Environmental Biotechnology , Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing , 100085 , PR China
- University of Chinese Academy of Sciences , Beijing , 100049 , China
| | - Kifayatullah Khan
- State Key Laboratory of Urban and Regional Ecology , Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085 , China
- Department of Environmental and Conservation Sciences , University of Swat , Swat 19130 , Pakistan
| | - Lihui Yang
- Key Laboratory of Environmental Biotechnology , Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing , 100085 , PR China
- University of Chinese Academy of Sciences , Beijing , 100049 , China
| | - Ai-Jie Wang
- University of Chinese Academy of Sciences , Beijing , 100049 , China
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20
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Zhu X, He F, Xia M, Liu H, Ding J. Evaluation of Fe(iii)EDTA reduction with ascorbic acid in a wet denitrification system. RSC Adv 2019; 9:24386-24393. [PMID: 35527871 PMCID: PMC9069671 DOI: 10.1039/c9ra02678a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 07/04/2019] [Indexed: 11/21/2022] Open
Abstract
The reduction of Fe(iii)EDTA to Fe(ii)EDTA is the core process in a wet flue gas system with simultaneous desulfurization and denitrification. Herein, at first, the reductant ascorbic acid (VC) was used for reducing Fe(iii)EDTA. The feasibility of Fe(iii)EDTA reduction with ascorbic acid was investigated at different Fe(iii)EDTA concentrations, various pH values, diverse temperatures, and different molar ratios of VC to Fe(iii)EDTA. The results showed that the Fe(ii)EDTA concentration increased with an increase in the initial Fe(iii)EDTA concentration. Furthermore, the reduction efficiency increased as the mole ratio of VC to Fe(iii)EDTA was increased, and all the Fe(iii)EDTA reduction efficiencies were close to 100% when the mole ratio was more than 0.5. On the other hand, an alkaline environment did not favor the conversion of Fe(iii)EDTA by VC. The Fe(iii)EDTA conversion slightly increased as the temperature was increased. Moreover, compared with other reduction systems, ascorbic acid (VC) was found to be more powerful in reducing Fe(iii)EDTA, especially in air. In addition, VC only exhibited powerful ability in the conversion of Fe(iii)EDTA to Fe(ii)EDTA and hardly reduced Fe(ii)EDTA–NO. Finally, the stoichiometry of Fe(iii)EDTA reduction by ascorbic acid was derived. Thus, our study would offer a bridge between foundational research and industrial denitration using the combination of Fe(ii)EDTA and VC. Color change during Fe(iii)EDTA reduction by VC ((A) Fe(iii)EDTA color; (B) color of Fe(iii)EDTA solution after reduction by VC; (C) Fe(ii)EDTA-NO color; (D) color of Fe(ii)EDTA-NO solution after reduction by VC).![]()
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Affiliation(s)
- Xinyu Zhu
- State Key Laboratory for Nuclear Resources and Environment
- School of Chemistry
- Biology and Materials Science
- East China University of Technology
- Nanchang 330013
| | - Feiqiang He
- State Key Laboratory for Nuclear Resources and Environment
- School of Chemistry
- Biology and Materials Science
- East China University of Technology
- Nanchang 330013
| | - Meng Xia
- State Key Laboratory for Nuclear Resources and Environment
- School of Chemistry
- Biology and Materials Science
- East China University of Technology
- Nanchang 330013
| | - Honggen Liu
- State Key Laboratory for Nuclear Resources and Environment
- School of Chemistry
- Biology and Materials Science
- East China University of Technology
- Nanchang 330013
| | - Jianhua Ding
- State Key Laboratory for Nuclear Resources and Environment
- School of Chemistry
- Biology and Materials Science
- East China University of Technology
- Nanchang 330013
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21
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Zhao J, Zhang C, Sun C, Li W, Zhang S, Li S, Zhang D. Electron transfer mechanism of biocathode in a bioelectrochemical system coupled with chemical absorption for NO removal. BIORESOURCE TECHNOLOGY 2018; 254:16-22. [PMID: 29413918 DOI: 10.1016/j.biortech.2018.01.066] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 01/10/2018] [Accepted: 01/15/2018] [Indexed: 06/08/2023]
Abstract
A biocathode with the function of Fe(III)EDTA and Fe(II)EDTA-NO reduction was applied in a microbial electrolysis cell coupled with chemical absorption for NO removal from flue gas. As the mediated electron transfer was excluded by the same electrochemical characterizations of the biocathodes before and after a 48 h continuous operation, the profiles of reduction experiments indicated that direct electron transfer was the main mechanism of Fe(III)EDTA reduction, while Fe(III)EDTA-NO was mainly reduced via Fe(II)-assisted autotrophic denitrification. The microscopy of the biocathode confirmed the existence of pili, which was supposed to be bacterial nanowires for electron transfer. The analysis of microbial community revealed that iron-reducing bacteria, including Escherichia coli, had the possibility of electron uptake from electrode via physical contact. These results first time gave us in-depth understanding of the electron transfer in the multifunctional biocathode and mechanism for further enhancement of the bioreduction processes.
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Affiliation(s)
- Jingkai Zhao
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, Hangzhou 310027, China
| | - Chunyan Zhang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, Hangzhou 310027, China
| | - Cheng Sun
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, Hangzhou 310027, China
| | - Wei Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, Hangzhou 310027, China.
| | - Shihan Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Sujing Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, Hangzhou 310027, China
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22
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Yuan Q, Kong XT, Hou GL, Jiang L, Wang XB. Photoelectron spectroscopic and computational studies of [EDTA·M(iii)]− complexes (M = H3, Al, Sc, V–Co). Phys Chem Chem Phys 2018; 20:19458-19469. [DOI: 10.1039/c8cp01548a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoelectron spectroscopic and computational studies of [EDTA·M(iii)]− complexes reveal their redox chemistry and specific metal bindings.
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Affiliation(s)
- Qinqin Yuan
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Xiang-Tao Kong
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Gao-Lei Hou
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Ling Jiang
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Xue-Bin Wang
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
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23
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Delforno TP, Okada DY, Faria CV, Varesche MBA. Evaluation of anionic surfactant removal in anaerobic reactor with Fe(III) supplementation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 183:687-693. [PMID: 27639303 DOI: 10.1016/j.jenvman.2016.09.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Revised: 09/05/2016] [Accepted: 09/07/2016] [Indexed: 06/06/2023]
Abstract
The objective of this study was to evaluate the removal of linear alkylbenzene sulfonate (LAS) associated with Fe(III) supplementation using an expanded granular sludge bed (EGSB) reactor. The reactor was inoculated with a granular sludge and fed with synthetic wastewater containing a specific LAS load rate (SLLR) of 1.5 mg gVS-1 d-1 (∼16.4 mgLAS L-1 influent) and supplied with 7276 μMol L-1 of Fe(III). The biomasses from the inoculum and at the end of the EGSB-Fe operation (127 days) were characterized using 16S rRNA Ion Tag sequencing. An increase of 20% in the removal efficiency was observed compared to reactors without Fe(III) supplementation that was reported in the literature, and the LAS removal was approximately 84%. The Fe(III) reduction was dissimilatory (the total iron concentration in the influent and effluent were similar) and reached approximately 64%. The higher Fe(III) reduction and LAS removal were corroborated by the enrichment of genera, such as Shewanella (only EGSB-Fe - 0.5%) and Geobacter (1% - inoculum; 18% - EGSB-Fe). Furthermore, the enrichment of genera that degrade LAS and/or aromatic compounds (3.8% - inoculum; 29.6% - EGSB-Fe of relative abundance) was observed for a total of 20 different genera.
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Affiliation(s)
- T P Delforno
- Microbial Resources Division, Research Center for Chemistry, Biology and Agriculture (CPQBA), Campinas University - UNICAMP, CP 6171, Campinas, SP, CEP 13081-970, Brazil.
| | - D Y Okada
- University of Campinas (UNICAMP), School of Technology, Division of Technology in Environment Sanitation, Limeira, SP, CEP 13484-332, Brazil.
| | - C V Faria
- Laboratory of Biological Processes, Department of Hydraulics and Sanitation, Engineering School of São Carlos - University of São Paulo (EESC - USP) Campus II, São Carlos, SP, CEP 13563-120, Brazil.
| | - M B A Varesche
- Laboratory of Biological Processes, Department of Hydraulics and Sanitation, Engineering School of São Carlos - University of São Paulo (EESC - USP) Campus II, São Carlos, SP, CEP 13563-120, Brazil.
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24
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Aru L, Qian Z, Gao Y, Shao L, Wang JX, Chen JF. Removal of nitric oxide in a microporous tube-in-tube microchannel reactor by ferrous chelate solution. CAN J CHEM ENG 2016. [DOI: 10.1002/cjce.22604] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- La Aru
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 P. R. China
| | - Zhi Qian
- College of Resources and Environment; University of the Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Yi Gao
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 P. R. China
| | - Lei Shao
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 P. R. China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology; Beijing University of Chemical Technology; Beijing, 100029 P. R. China
| | - Jie-Xin Wang
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 P. R. China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology; Beijing University of Chemical Technology; Beijing, 100029 P. R. China
| | - Jian-Feng Chen
- State Key Laboratory of Organic-Inorganic Composites; Beijing University of Chemical Technology; Beijing 100029 P. R. China
- Research Center of the Ministry of Education for High Gravity Engineering and Technology; Beijing University of Chemical Technology; Beijing, 100029 P. R. China
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25
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Zhao J, Xia Y, Li M, Li S, Li W, Zhang S. A Biophysicochemical Model for NO Removal by the Chemical Absorption-Biological Reduction Integrated Process. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:8705-8712. [PMID: 27442232 DOI: 10.1021/acs.est.6b01414] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The chemical absorption-biological reduction (CABR) integrated process is regarded as a promising technology for NOx removal from flue gas. To advance the scale-up of the CABR process, a mathematic model based on mass transfer with reaction in the gas, liquid, and biofilm was developed to simulate and predict the NOx removal by the CABR system in a biotrickling filter. The developed model was validated by the experimental results and subsequently was used to predict the system performance under different operating conditions, such as NO and O2 concentration and gas and liquid flow rate. NO distribution in the gas phase along the biotrickling filter was also modeled and predicted. On the basis of the modeling results, the liquid flow rate and total iron concentration were optimized to achieve >90% NO removal efficiency. Furthermore, sensitivity analysis of the model revealed that the performance of the CABR process was controlled by the bioreduction activity of Fe(III)EDTA. This work will provide the guideline for the design and operation of the CABR process in the industrial application.
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Affiliation(s)
- Jingkai Zhao
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University , Yuquan Campus, Hangzhou 310027, China
| | - Yinfeng Xia
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University , Yuquan Campus, Hangzhou 310027, China
| | - Meifang Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University , Yuquan Campus, Hangzhou 310027, China
| | - Sujing Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University , Yuquan Campus, Hangzhou 310027, China
| | - Wei Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University , Yuquan Campus, Hangzhou 310027, China
| | - Shihan Zhang
- College of Environment, Zhejiang University of Technology , Hangzhou 310032, China
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Wang X, Xu X, Liu S, Zhang Y, Zhao C, Yang F. Combination of complex adsorption and anammox for nitric oxide removal. JOURNAL OF HAZARDOUS MATERIALS 2016; 312:175-183. [PMID: 27037471 DOI: 10.1016/j.jhazmat.2016.03.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Revised: 02/27/2016] [Accepted: 03/14/2016] [Indexed: 06/05/2023]
Abstract
High-efficiency Fe(II)EDTA (approximately 80%) was selected to remove nitric oxide (NO) in a complex adsorption process; subsequently, this Fe(II)EDTA was combined with the anammox process to eliminate the NO in flue gas. The Fe(II)EDTA-NO solution negatively affected the conventional nitrite-dependent anammox bacteria when the solution concentration exceeded 0.5mM. Fe(II)EDTA-NO-cultivated anammox bacteria removed the ammonium coupled to complex NO reduction (≤3.5mM). The batch test results demonstrated that NH4(+) was eliminated through Fe(II)EDTA-NO reduction via anammox. The removal of complex NO and NH4(+) exhibited high relativity relevance, and the Fe(II)EDTA-NO/NH4(+) molar ratio was approximately 0.97. The complex NO-dependent process generates lesser nitrate than that generated by conventional anammox. Moreover, Candidatus Kuenenia stuttgartiensitiensis became the dominant anammox bacterial community when the biomass is cultivated using the inoculated bacteria, and the proportion of the former increased to 90% from the initial 38% for ribosomal intergenic spacer analysis and library construction.
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Affiliation(s)
- Xiaojing Wang
- MOE, Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
| | - Xiaochen Xu
- MOE, Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian, China.
| | - Sitong Liu
- Key Laboratory of Water and Sediment Sciences, Ministry of Education of China, No. 5, Yiheyuan Road, Beijing, China
| | - Yun Zhang
- MOE, Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
| | - Chuanqi Zhao
- MOE, Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
| | - Fenglin Yang
- MOE, Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
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27
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Xia Y, Zhao J, Li M, Zhang S, Li S, Li W. Bioelectrochemical Reduction of Fe(II)EDTA-NO in a Biofilm Electrode Reactor: Performance, Mechanism, and Kinetics. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:3846-3851. [PMID: 26900881 DOI: 10.1021/acs.est.5b05861] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A biofilm electrode reactor (BER) is proposed to effectively regenerate Fe(II)EDTA, a solvent for NOx removal from flue gas, from Fe(II)EDTA-NO, a spent solution. In this study, the performance, mechanism, and kinetics of the bioelectrochemical reduction of Fe(II)EDTA-NO were investigated. The pathways of Fe(II)EDTA-NO reduction were investigated via determination of nitrogen element balance in the BER and an abiotic electrode reactor. The experimental results indicate that the chelated NO (Fe(II)EDTA-NO) is reduced to N2 with N2O as an intermediate. However, the oxidation of NO occurred in the absence of Fe(II)EDTA in abiotic reactors. Furthermore, the accumulation of N2O was suppressed with the help of electricity. The preponderant electron donor for reduction of Fe(II)EDTA-NO was also confirmed via analysis of the electron conservation. About 87% of Fe(II)EDTA-NO was reduced using Fe(II)EDTA as the electron donor in the presence of both glucose and cathode electrons while the cathode electrons were utilized for the reduction of Fe(III)EDTA to Fe(II)EDTA. Michaelis-Menten kinetic constants of bioelectrochemical reduction of Fe(II)EDTA-NO were also calculated. The maximum reduction rate of Fe(II)EDTA-NO was 13.04 mol m(-3) h(-1), which is 50% higher than that in a conventional biofilter.
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Affiliation(s)
- Yinfeng Xia
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus) , Hangzhou, 310027, China
- Institute of Environmental Engineering, Zhejiang University (Zijingang Campus) , Hangzhou, 310058, China
| | - Jingkai Zhao
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus) , Hangzhou, 310027, China
| | - Meifang Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus) , Hangzhou, 310027, China
| | - Shihan Zhang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus) , Hangzhou, 310027, China
| | - Sujing Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus) , Hangzhou, 310027, China
| | - Wei Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus) , Hangzhou, 310027, China
- Institute of Environmental Engineering, Zhejiang University (Zijingang Campus) , Hangzhou, 310058, China
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Li W, Zhao J, Zhang L, Xia Y, Liu N, Li S, Zhang S. Pathway of FeEDTA transformation and its impact on performance of NOx removal in a chemical absorption-biological reduction integrated process. Sci Rep 2016; 6:18876. [PMID: 26743930 PMCID: PMC4705534 DOI: 10.1038/srep18876] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 11/30/2015] [Indexed: 11/09/2022] Open
Abstract
A novel chemical absorption-biological reduction (CABR) integrated process, employing ferrous ethylenediaminetetraacetate (Fe(II)EDTA) as a solvent, is deemed as a potential option for NOx removal from the flue gas. Previous work showed that the Fe(II)EDTA concentration was critical for the NOx removal in the CABR process. In this work, the pathway of FeEDTA (Fe(III)/Fe(II)-EDTA) transformation was investigated to assess its impact on the NOx removal in a biofilter. Experimental results revealed that the FeEDTA transformation involved iron precipitation and EDTA degradation. X-ray photoelectron spectroscopy analysis confirmed the iron was precipitated in the form of Fe(OH)3. The iron mass balance analysis showed 44.2% of the added iron was precipitated. The EDTA degradation facilitated the iron precipitation. Besides chemical oxidation, EDTA biodegradation occurred in the biofilter. The addition of extra EDTA helped recover the iron from the precipitation. The transformation of FeEDTA did not retard the NO removal. In addition, EDTA rather than the iron concentration determined the NO removal efficiency.
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Affiliation(s)
- Wei Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China.,Institute of Environmental Engineering, Zhejiang University (Zijingang Campus), Hangzhou, 310058, China
| | - Jingkai Zhao
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
| | - Lei Zhang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China.,Zhejiang Industrial Environmental Protection Design &Research Institute Co., Ltd., Hangzhou, 310035, China
| | - Yinfeng Xia
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China.,Institute of Environmental Engineering, Zhejiang University (Zijingang Campus), Hangzhou, 310058, China
| | - Nan Liu
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
| | - Sujing Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
| | - Shihan Zhang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
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He F, Deng X, Chen M. Kinetics of FeIIIEDTA complex reduction with iron powder under aerobic conditions. RSC Adv 2016. [DOI: 10.1039/c6ra05222c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The kinetic model of FeIIIEDTA complex reduction with iron powder under aerobic condition is deduced and validated. It was .
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Affiliation(s)
- Feiqiang He
- Department of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- PR China
| | - Xianhe Deng
- Department of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- PR China
| | - Min Chen
- Department of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- PR China
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30
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Zhou Z, Lin T, Jing G, Lv B, Liu Y. High-efficiency removal of NO x by a novel integrated chemical absorption and two-stage bioreduction process using magnetically stabilized fluidized bed reactors. Sci China Chem 2015. [DOI: 10.1007/s11426-015-5413-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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31
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Re-acclimation performance and microbial characteristics of a thermophilic biofilter for NOx removal from flue gas. Appl Microbiol Biotechnol 2015; 99:6879-87. [PMID: 25900192 DOI: 10.1007/s00253-015-6585-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 03/22/2015] [Accepted: 03/25/2015] [Indexed: 10/23/2022]
Abstract
Currently, a novel chemical absorption-biological reduction (CABR) integrated process, employing Fe(II)EDTA as a solvent, is being under development to reduce the cost of NOx removal from flue gas. In this work, the NO removal profile, re-acclimation performance, and microbial characteristics in a thermophilic biofilter were investigated at the conditions typical to CABR process. The biofilter comprised of four layers of packing material with a surface area of 1200 m(2) m(-3). Experimental results revealed that the biofilter could remove 95 % of the fed NO at typical flue gas conditions. As the gas residence time varied from 90 to 15 s, the NO removal efficiency decreased from 100 to 56.5 % due to the NO mass transfer limitation. The longer period of the biofilter shutdown required more time for its re-acclimation. For example, after 8-day shutdown, the biofilter was re-acclimated in 32 h. Denaturing gradient gel electrophoresis analysis of PCR-amplified product showed that Pseudomonas, a group of denitrifier, was dominant in the biofilter. Because the Pseudomonas was abundant at the bottom layer of packed-bed, the bottom layer contributed to 60-70 % of the total NO removal. In addition, Pseudomonas gradually faded away along the gas flow path from the bottom to the top of biofilter, resulting in a significant decrease in NO removal at the other three packed-bed layers. These observed results will provide the process engineering and scale-up data with respect to the biofilter operations to help advance the CABR process to pilot-scale testing.
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32
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Li W, Xia Y, Zhao J, Liu N, Li S, Zhang S. Generation, utilization, and transformation of cathode electrons for bioreduction of Fe(III)EDTA in a biofilm electrode reactor related to NOx removal from flue gas. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:4530-4535. [PMID: 25799265 DOI: 10.1021/es5058488] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A chemical absorption-biological reduction (CABR) integrated system, which employs iron chelate as a solvent, is under development for NOx removal from flue gas. Biofilm electrode reactor (BER) is deemed as a promising bioreactor to regenerate the iron chelate. Although it has been proved that BER can significantly enhance the bioreduction of Fe(III)EDTA, the bioelectrochemistry mechanism involved in the bioreduction of Fe(III)EDTA remains unknown. This work aims to explore this mechanism via the analysis of the generation, utilization, and transformation of cathode electrons in the BER. The results indicate that the generation of cathode electrons follows Faraday's law. The generated cathode electrons were used to produce H2 and directly reduce Fe(III)EDTA in the BER. Meanwhile, the produced H2 served as an electron donor for bioreduction of Fe(III)EDTA. The excess H2 product was transformed to simple organics, e.g., methanol by the hydrogen autotrophy of Pseudomonas under the inorganic and anaerobic conditions. Overall, this work revealed that the reduction of Fe(III)EDTA in the BER was enhanced by both direct electrochemical reduction and indirect bioreduction using H2 as an intermediate. It is also interesting that the excess H2 product was transformed to methanol for microbial metabolism and energy storage in the BER.
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Affiliation(s)
- Wei Li
- †Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
- ‡Institute of Environmental Engineering, Zhejiang University (Zijingang Campus), Hangzhou, 310058, China
| | - Yinfeng Xia
- †Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
- ‡Institute of Environmental Engineering, Zhejiang University (Zijingang Campus), Hangzhou, 310058, China
| | - Jingkai Zhao
- †Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
| | - Nan Liu
- †Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
| | - Sujing Li
- †Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
| | - Shihan Zhang
- †Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University (Yuquan Campus), Hangzhou, 310027, China
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33
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Fe(II)EDTA-NO reduction by a newly isolated thermophilic Anoxybacillus sp. HA from a rotating drum biofilter for NOx removal. J Microbiol Methods 2015; 109:129-33. [DOI: 10.1016/j.mimet.2014.12.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 12/19/2014] [Accepted: 12/19/2014] [Indexed: 11/22/2022]
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34
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Treatment of ferrous-NTA-based NO x scrubber solution by an up-flow anaerobic packed bed bioreactor. Appl Microbiol Biotechnol 2015; 99:5281-93. [DOI: 10.1007/s00253-014-6372-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 12/24/2014] [Accepted: 12/28/2014] [Indexed: 10/24/2022]
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35
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Zhou ZM, Wang XY, Lin TM, Jing GH. Reduction of ethylenediaminetetraacetic acid iron(III) by Klebsiella sp. FD-3 immobilized on iron(II, III) oxide poly (styrene-glycidyl methacrylate) magnetic porous microspheres: effects of inorganic compounds and kinetic study of effective diffusion in porous media. BIORESOURCE TECHNOLOGY 2014; 172:1-7. [PMID: 25216123 DOI: 10.1016/j.biortech.2014.08.110] [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: 06/16/2014] [Revised: 08/24/2014] [Accepted: 08/25/2014] [Indexed: 06/03/2023]
Abstract
Fe3O4 poly (styrene-glycidyl methacrylate) magnetic porous microspheres (MPPMs) were introduced to immobilize Klebsiella sp. FD-3, an iron-reducing bacterium applied to reduce Fe(III)EDTA. The effects of potential inhibitors (S(2-), SO3(2-), NO3(-), NO2(-) and Fe(II)EDTA-NO) on Fe(III)EDTA reduction were investigated. S(2-) reacted with Fe(III)EDTA as an electron-shuttling compound and enhanced the reduction. But Fe(III)EDTA reduction was inhibited by SO3(2-) and Fe(II)EDTA-NO due to their toxic to microorganisms. Low concentrations of NO3(-) and NO2(-) accelerated Fe(III)EDTA reduction, but high concentrations inhibited the reduction, whether by free or immobilized FD-3. The immobilized FD-3 performed better than freely-suspended style. The substrate mass transfer and diffusion kinetics in the porous microspheres were calculated. The value of Thiele modulus and effectiveness factors showed that the intraparticle diffusion was fairly small and neglected in this carrier. Fe(III)EDTA reduction fitted first-order model at low Fe(III)EDTA concentration, and changed to zero-order model at high concentrations.
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Affiliation(s)
- Zuo-Ming Zhou
- Department of Environmental Science & Engineering, Huaqiao University, Xiamen 361021, China
| | - Xiao-Yan Wang
- Department of Environmental Science & Engineering, Huaqiao University, Xiamen 361021, China
| | - Tian-Ming Lin
- Department of Environmental Science & Engineering, Huaqiao University, Xiamen 361021, China
| | - Guo-Hua Jing
- Department of Environmental Science & Engineering, Huaqiao University, Xiamen 361021, China.
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Current advances of integrated processes combining chemical absorption and biological reduction for NO x removal from flue gas. Appl Microbiol Biotechnol 2014; 98:8497-512. [PMID: 25149446 DOI: 10.1007/s00253-014-6016-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 08/04/2014] [Accepted: 08/06/2014] [Indexed: 01/09/2023]
Abstract
Anthropogenic nitrogen oxides (NO x ) emitted from the fossil-fuel-fired power plants cause adverse environmental issues such as acid rain, urban ozone smoke, and photochemical smog. A novel chemical absorption-biological reduction (CABR) integrated process under development is regarded as a promising alternative to the conventional selective catalytic reduction processes for NO x removal from the flue gas because it is economic and environmentally friendly. CABR process employs ferrous ethylenediaminetetraacetate [Fe(II)EDTA] as a solvent to absorb the NO x following microbial denitrification of NO x to harmless nitrogen gas. Meanwhile, the absorbent Fe(II)EDTA is biologically regenerated to sustain the adequate NO x removal. Compared with conventional denitrification process, CABR not only enhances the mass transfer of NO from gas to liquid phase but also minimize the impact of oxygen on the microorganisms. This review provides the current advances of the development of the CABR process for NO x removal from the flue gas.
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Durmazpinar S, Ilhan N, Demir G, Insel G, Dizge N, Ergenekon P, Erhan E, Keskinler B. Biological NOx removal by denitrification process in a jet-loop bioreactor: system performance and model development. ENVIRONMENTAL TECHNOLOGY 2014; 35:1358-1366. [PMID: 24701934 DOI: 10.1080/09593330.2013.868529] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nitrogen monoxide (NO) and nitrogen dioxide referred as NOx are one of the most important air pollutants in the atmosphere. Biological NOx removal technologies have been developing to reach a cost-effective control method for upcoming stringent NOx emission standards. The BioDeNOx system was seen as a promising biological NOx control technology which is composed of two reactors, one for absorbing of NO in an aqueous Fe(II)EDTA2- solution and the other for subsequent reduction to N2 gas in a biological reactor by the denitrification process. In this study, instead of two discrete reactors, only one jet-loop bioreactor (JLBR) was utilized as both absorption and denitrification unit and no chelate-forming chemicals were added. In other words, the advantage of better mass transfer conditions of jet bioreactor was used instead of Fe(II)EDTA2-. The process was named as Jet-BioDeNOx. The JLBR was operated for the removal of NOx from air streams containing 500-3000 ppm NOx and the results showed that the removal efficiency was between 81% and 94%. The air to liquid flow ratio (Q(G)/Q(RAS)) varied in the range of 0.07-0.12. Mathematical modelling of the system demonstrated that the removal efficiency strongly depends on this ratio. The high mass transfer conditions prevailed in the reactor provided a competitive advantage on removing NO gas without any requirement of chelating chemicals.
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38
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Evaluation of Fe(III)EDTA and Fe(II)EDTA-NO reduction in a NO x scrubber solution by magnetic Fe3O4-chitosan microspheres immobilized microorganisms. BIOTECHNOL BIOPROC E 2014. [DOI: 10.1007/s12257-013-0207-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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39
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Xia YF, Lu BH, Liu N, Chen QL, Li SJ, Li W. NOx removal in chemical absorption-biological reduction integrated system: process rate and rate-limiting step. BIORESOURCE TECHNOLOGY 2013; 149:184-190. [PMID: 24099974 DOI: 10.1016/j.biortech.2013.09.056] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2013] [Revised: 09/08/2013] [Accepted: 09/12/2013] [Indexed: 06/02/2023]
Abstract
Biological reduction of Fe(III)EDTA is considered as the key step that limits the removal efficiency of the chemical absorption-biological reduction integrated system. In this study, the process rates of each reaction step under typical conditions (T=50°C, C FeII(EDTA)=1-5 mmol/L, CNO=0-500 ppm, CO2=1-10%, pH=7) were determined. Relevant kinetic constants including rate constants of absorption part and Michaelis-Menten kinetic constants of regeneration part were also obtained. On this basis, the theoretical process rates of each reaction step were predicted and compared in a steady state. The results confirmed that the removal rate of NO in this system is limited by the biological reduction of Fe(III)EDTA. Moreover, it indicated that increasing the concentration of total iron appropriately could enhance the bioreduction of Fe(III)EDTA.
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Affiliation(s)
- Yin-Feng Xia
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, Department of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, Hangzhou 310027, China; Institute of Environmental Engineering, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
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Wang L, Wang F, Li P, Zhang L. Ferrous–tetrapolyphosphate complex induced dioxygen activation for toxic organic pollutants degradation. Sep Purif Technol 2013. [DOI: 10.1016/j.seppur.2013.10.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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41
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42
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43
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Zhou Z, Jing G, Zheng X. Reduction of Fe(III)EDTA by Klebsiella sp. strain FD-3 in NOx scrubber solutions. BIORESOURCE TECHNOLOGY 2013; 132:210-216. [PMID: 23411450 DOI: 10.1016/j.biortech.2013.01.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 01/01/2013] [Accepted: 01/05/2013] [Indexed: 06/01/2023]
Abstract
Biological reduction of Fe(III) to Fe(II) is a key step in nitrogen oxides (NOx) removal by the integrated chemical absorption-biological reduction method, which determines the concentration of Fe(II) in the scrubbing liquid. A new Fe(III)EDTA reduction strain, named as FD-3, was isolated from mixed cultures used in the integrated NOx removal process and identified as Klebsiella sp. by 16S rDNA sequence analysis. The reduction abilities of FD-3 and the influence of nitrogen-containing compounds (Fe(II)EDTA-NO, NO3(-) and NO2(-)) and sulfur-containing compounds (SO4(2-), SO3(2-)) on the Fe(III)EDTA reduction were investigated. The results indicated that strain FD-3 could reduce Fe(III)EDTA efficiently. NO3(-), NO2(-) and Fe(II)EDTA-NO inhibit the reduction of Fe(III)EDTA and could also serve as electron acceptor for strain FD-3. SO3(2-) inhibited Fe(III)EDTA reduction while SO4(2-) had no obviously effect on Fe(III)EDTA reduction. The relationship between cell growth and Fe(III)EDTA reduction could be described by the models based on Logistic equation.
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Affiliation(s)
- Zuoming Zhou
- Department of Environmental Science & Engineering, Huaqiao University, Xiamen 361021, China.
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Wang X, Zhou Z, Jing G. Synthesis of Fe3O4 poly(styrene-glycidyl methacrylate) magnetic porous microspheres and application in the immobilization of Klebsiella sp. FD-3 to reduce Fe(III)EDTA in a NO(x) scrubbing solution. BIORESOURCE TECHNOLOGY 2013; 130:750-756. [PMID: 23334160 DOI: 10.1016/j.biortech.2012.12.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 11/28/2012] [Accepted: 12/01/2012] [Indexed: 06/01/2023]
Abstract
Magnetic poly(styrene-glycidyl methacrylate) porous microspheres (MPPM) with high magnetic contents were prepared by surfactant reverse micelles and emulsion polymerization of monomers, in which the well-dispersed Fe(3)O(4) nanoparticles were modified by polyethylene glycol (PEG) and oleic acid (OA) respectively. The characterizations showed that both of the OA-MPPM and the PEG-MPPM were ferromagnetic, however, the OA-MPPM was used to immobilize the bacteria for more advantages. Therefore, the effects of monomer ratio, surfactant, crosslinker and amount of Fe(3)O(4) on the structure, morphology and magnetic contents of the OA-MPPM were investigated. Then, the OA-MPPM was utilized to immobilize Klebsiella sp. FD-3, an iron-reducing bacterium for Fe(III)EDTA reduction applied in NO(x) removal. Compared with free bacteria, the immobilized FD-3 showed a better tolerance to the unbeneficial pH and temperature conditions.
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Affiliation(s)
- Xiaoyan Wang
- Department of Environmental Science & Engineering, Huaqiao University, Xiamen 361021, China
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Chandrashekhar B, Pai P, Morone A, Sahu N, Pandey RA. Reduction of NOx in Fe-EDTA and Fe-NTA solutions by an enriched bacterial population. BIORESOURCE TECHNOLOGY 2013; 130:644-651. [PMID: 23334022 DOI: 10.1016/j.biortech.2012.12.051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Revised: 12/07/2012] [Accepted: 12/08/2012] [Indexed: 06/01/2023]
Abstract
An enriched biomass was developed from municipal sewage sludge consisting of three dominant bacteria, representing the genera of Enterobacter, Citrobacter and Streptomyces. The biomass was used in a series of batch experiments in order to determine kinetic constants associated with biomass growth and NOx reduction in aqueous Ferrous EDTA/NTA solutions and Ferric EDTA/NTA solutions using ethanol as organic electron donor. The maximum specific reduction rates of NOx in Ferrous EDTA and Ferrous NTA solutions were 0.037 and 0.047mMolesL(-1)d(-1)mg(-1) biomass, respectively while in Ferric EDTA and Ferric NTA solutions were 0.022 and 0.024mMolesL(-1)d(-1)mg(-1) biomass, respectively. In case of Ferric EDTA/NTA solution, the kinetic constants associated with reduction of Ferric EDTA/NTA to Ferrous EDTA/NTA were also evaluated simultaneously. The maximum specific reduction rates of Ferric EDTA and Ferric NTA were 0.0021 and 0.0026mMolesL(-1)d(-1)mg(-1) biomass. The significance of these observations are presented and discussed in this paper.
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Affiliation(s)
- B Chandrashekhar
- Environmental Biotechnology Division, National Environmental Engineering Research Institute, Nehru Marg, Nagpur 440020, India
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Franke A, van Eldik R. Factors That Determine the Mechanism of NO Activation by Metal Complexes of Biological and Environmental Relevance. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201201111] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Zhou Y, Gao L, Xia YF, Li W. Enhanced reduction of Fe(II)EDTA-NO/Fe(III)EDTA in NO(x) scrubber solution using a three-dimensional biofilm-electrode reactor. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:12640-12647. [PMID: 23113866 DOI: 10.1021/es3025726] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A promising technique called chemical absorption-biological reduction (CABR) integrated approach has been developed recently for the nitrogen oxides (NO(x)) removal from flue gases. The major challenge for this approach is how to enhance the rate of the biological reduction step. To tackle the challenge, a three-dimensional biofilm-electrode reactor (3D-BER) was utilized. This reactor provides not only considerable amount of sites for biofilm, but also many electron donors for bioreduction. Factors affecting the performance of 3D-BER were optimized, including material of the third electrode (graphite), glucose concentration (1000 mg·L(-1)), and volume current density (30.53 A·m(-3) NCC). Experimental results clearly demonstrated that this method significantly promotes the bioreduction rate of Fe(II)EDTA-NO (0.313 mmol·L(-1)·h(-1)) and Fe(III)EDTA (0.564 mmol·L(-1)·h(-1)) simultaneously. Experiments on the mechanism showed that Fe(II)EDTA serves as the primary electron donor in the reduction of Fe(II)EDTA-NO, whereas the reduction of Fe(III)EDTA took advantage of both glucose and electrolysis-generated H(2) as electron donors. High concentration of Fe(II)EDTA-NO or Fe(III)EDTA interferes the bioreduction of the other one. The proposed methodology shows a promising prospect for NO(x) removal from flue gas.
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Affiliation(s)
- Ya Zhou
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, Zhejiang University (Yuquan Campus), Hangzhou 310027, China
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Regeneration of hexamminecobalt(II) under the catalysis of activated carbon modified with ZnCl2 solution. J IND ENG CHEM 2012. [DOI: 10.1016/j.jiec.2012.02.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Dong X, Zhang Y, Zhou J, Li N, Chen M. Reduction of Fe(III)EDTA in a NOx scrubber liquor by a denitrifying bacterium and the effects of inorganic sulfur compounds on this process. BIORESOURCE TECHNOLOGY 2012; 120:127-132. [PMID: 22784963 DOI: 10.1016/j.biortech.2012.06.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2012] [Revised: 06/03/2012] [Accepted: 06/05/2012] [Indexed: 06/01/2023]
Abstract
Biological reduction of Fe(III)EDTA is one of the key steps in nitrogen oxides removal in the integrated approach of metal chelate absorption combined with microbial reduction. Paracoccus denitrificans ZGL1 was used as a model bacterium to evaluate the process of Fe(III)EDTA reduction by such microorganisms that could carry out the simultaneous reduction of NO chelated by Fe(II)EDTA (Fe(II)EDTA-NO) and Fe(III)EDTA. Enzymes analysis indicated Fe(III)EDTA reductase of ZGL1 was located both in the membrane and cytoplasmic fractions. Glucose was identified as the most efficient electron donor for Fe(III)EDTA reduction. Better reduction performance was obtained with higher initial cell concentration corresponding to a specific reduction rate of 8.7 μmol h(-1) mg protein(-1). The presence of sulfate and thiosulfate had no influences on both cell growth and Fe(III)EDTA reduction. Fe(III)EDTA reduction rate and cell growth could be inhibited by addition of sulfite mainly due to its direct and indirect toxic effects.
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Affiliation(s)
- Xiyang Dong
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China
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Jing G, Zhou J, Zhou Z, Lin T. Reduction of Fe(III)EDTA(-) in a NO(x) scrubbing solution by magnetic Fe3O4-chitosan microspheres immobilized mixed culture of iron-reducing bacteria. BIORESOURCE TECHNOLOGY 2012; 108:169-175. [PMID: 22281145 DOI: 10.1016/j.biortech.2011.12.112] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2011] [Revised: 12/19/2011] [Accepted: 12/20/2011] [Indexed: 05/31/2023]
Abstract
Magnetic Fe(3)O(4)-chitosan microspheres were prepared by co-precipitating of Fe(2+) and Fe(3+) ions with NaOH in the presence of chitosan. The saturated magnetization of the resulting material was 20.0 emu/g. Then these magnetic microspheres were employed to immobilize iron-reducing bacteria to improve the biological reduction of Fe(III)EDTA(-), which was one of the key steps in nitrogen oxides (NO(x)) removal by the integrated chemical absorption-biological reduction process. The immobilized bacteria performed well on Fe(III)EDTA(-) reduction than free bacteria, even under unfavorable pH and temperatures. Furthermore, the effects of NO(2)(-), NO(3)(-), SO(3)(-), and S(2-), the potential inhibition compounds in the scrubber solution, on the reduction of Fe(III)EDTA(-) by the immobilized and free bacteria were also studied.
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Affiliation(s)
- Guohua Jing
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen 361021, China.
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