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Mahmoud MS, Al-Aufi R, Al-Saidi A, Al-Samahi S, Al-Bulushi R, Rajan G, Abdelmouleh M, Jedidi I. Effect of compression molding of CaCO 3 powder on the kinetics of CO 2 capture towards sustainable CO 2 capture and sequestration cycle. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:110981-110994. [PMID: 37798519 DOI: 10.1007/s11356-023-30094-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 09/22/2023] [Indexed: 10/07/2023]
Abstract
Reducing CO2 emissions from industrial sectors and motor vehicles is currently receiving much attention. There are different strategies for CO2 capture, one of which is using calcium oxide (CaO). In our proposed carbon dioxide cycle, limestone is first calcined to get CaO, which is then used to capture CO2 by converting it to CaCO3. Next, the released CO2 could be converted to different organic matter by different sequestration techniques. For this purpose, CaCO3 discs have been prepared by compression molding to investigate the effect of sintering temperature on the mechanical and chemical properties of CaO carbonation reaction. The aim of this work is to fill the knowledge gap for the effect of the contact profile between CO2 gas and CaO disc, particularly the effect of reducing the void fraction of CaO on the rate of carbonation reaction. It was found that the flexural strength of the CaO discs was influenced by several factors, such as the calcination temperature, duration of calcination, and pressing pressure. The carbonation step indicated that both CO2 and H2O are reacting with CaO simultaneously and progressively, with the progressive reaction of H2O and CO2 being a favorable route. The carbonation process happens as a surface reaction-controlled process followed by a slower internal diffusion-controlled process. Additionally, a kinetic study of the competing reactions indicated that two factors are controlling the process: diffusion of gases through the pores and then the reaction rate. Furthermore, our data showed that the CO2 uptake rate was 1352.34 mg/g CaO, indicating that 566.34 mg of CO2 was adsorbed inside the pores of the CaO disc. Based on these results, we propose a new mechanism of the sequence of the competing reactions. In summary, the CaO discs revealed a significant removal of CO2 from stack gases, which will be suitable for removing CO2 from exhaust gases generated by industrial processes and other sources of emissions such as vehicles and ships.
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Affiliation(s)
- Mohamed S Mahmoud
- Department of Engineering, College of Engineering and Technology, University of Technology and Applied Sciences, Suhar, 311, Sultanate of Oman.
- Faculty of Engineering, Chemical Engineering Department, Minia University, El Minia, 61516, Egypt.
| | - Rahma Al-Aufi
- Department of Engineering, College of Engineering and Technology, University of Technology and Applied Sciences, Suhar, 311, Sultanate of Oman
| | - Awsaf Al-Saidi
- Department of Engineering, College of Engineering and Technology, University of Technology and Applied Sciences, Suhar, 311, Sultanate of Oman
| | - Siham Al-Samahi
- Department of Engineering, College of Engineering and Technology, University of Technology and Applied Sciences, Suhar, 311, Sultanate of Oman
| | - Rawan Al-Bulushi
- Department of Engineering, College of Engineering and Technology, University of Technology and Applied Sciences, Suhar, 311, Sultanate of Oman
| | - Govinda Rajan
- Department of Engineering, College of Engineering and Technology, University of Technology and Applied Sciences, Suhar, 311, Sultanate of Oman
| | - Makki Abdelmouleh
- Laboratory of Materials Science and Environment (LMSE), Faculty of Science of Sfax, University of Sfax, 4,5 Km SoukraBlvd, 3018, Sfax, Tunisia
| | - Ilyes Jedidi
- Department of Engineering, College of Engineering and Technology, University of Technology and Applied Sciences, Suhar, 311, Sultanate of Oman
- Laboratory of Materials Science and Environment (LMSE), Faculty of Science of Sfax, University of Sfax, 4,5 Km SoukraBlvd, 3018, Sfax, Tunisia
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Li D, Dong H, Cao X, Wang W, Li C. Enhancing photosynthetic CO 2 fixation by assembling metal-organic frameworks on Chlorella pyrenoidosa. Nat Commun 2023; 14:5337. [PMID: 37660048 PMCID: PMC10475011 DOI: 10.1038/s41467-023-40839-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 08/12/2023] [Indexed: 09/04/2023] Open
Abstract
The CO2 concentration at ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) is crucial to improve photosynthetic efficiency for biomass yield. However, how to concentrate and transport atmospheric CO2 towards the Rubisco carboxylation is a big challenge. Herein, we report the self-assembly of metal-organic frameworks (MOFs) on the surface of the green alga Chlorella pyrenoidosa that can greatly enhance the photosynthetic carbon fixation. The chemical CO2 concentrating approach improves the apparent photo conversion efficiency to about 1.9 folds, which is up to 9.8% in ambient air from an intrinsic 5.1%. We find that the efficient carbon fixation lies in the conversion of the captured CO2 to the transportable HCO3- species at bio-organic interface. This work demonstrates a chemical approach of concentrating atmospheric CO2 for enhancing biomass yield of photosynthesis.
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Affiliation(s)
- Dingyi Li
- School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, China
| | - Hong Dong
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, China
| | - Xupeng Cao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Wangyin Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, China.
| | - Can Li
- School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, China.
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, China.
- University of Chinese Academy of Sciences, Beijing, China.
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3
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Deep eutectic systems for carbonic anhydrase extraction from microalgae biomass to improve carbon dioxide solubilization. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Boase K, González C, Vergara E, Neira G, Holmes D, Watkin E. Prediction and Inferred Evolution of Acid Tolerance Genes in the Biotechnologically Important Acidihalobacter Genus. Front Microbiol 2022; 13:848410. [PMID: 35516430 PMCID: PMC9062700 DOI: 10.3389/fmicb.2022.848410] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 02/28/2022] [Indexed: 11/18/2022] Open
Abstract
Acidihalobacter is a genus of acidophilic, gram-negative bacteria known for its ability to oxidize pyrite minerals in the presence of elevated chloride ions, a capability rare in other iron-sulfur oxidizing acidophiles. Previous research involving Acidihalobacter spp. has focused on their applicability in saline biomining operations and their genetic arsenal that allows them to cope with chloride, metal and oxidative stress. However, an understanding of the molecular adaptations that enable Acidihalobacter spp. to thrive under both acid and chloride stress is needed to provide a more comprehensive understanding of how this genus can thrive in such extreme biomining conditions. Currently, four genomes of the Acidihalobacter genus have been sequenced: Acidihalobacter prosperus DSM 5130T, Acidihalobacter yilgarnensis DSM 105917T, Acidihalobacter aeolianus DSM 14174T, and Acidihalobacter ferrooxydans DSM 14175T. Phylogenetic analysis shows that the Acidihalobacter genus roots to the Chromatiales class consisting of mostly halophilic microorganisms. In this study, we aim to advance our knowledge of the genetic repertoire of the Acidihalobacter genus that has enabled it to cope with acidic stress. We provide evidence of gene gain events that are hypothesized to help the Acidihalobacter genus cope with acid stress. Potential acid tolerance mechanisms that were found in the Acidihalobacter genomes include multiple potassium transporters, chloride/proton antiporters, glutamate decarboxylase system, arginine decarboxylase system, urease system, slp genes, squalene synthesis, and hopanoid synthesis. Some of these genes are hypothesized to have entered the Acidihalobacter via vertical decent from an inferred non-acidophilic ancestor, however, horizontal gene transfer (HGT) from other acidophilic lineages is probably responsible for the introduction of many acid resistance genes.
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Affiliation(s)
- Katelyn Boase
- Curtin Medical School, Curtin University, Perth, WA, Australia
| | - Carolina González
- Center for Bioinformatics and Genome Biology, Centro Ciencia & Vida, Santiago, Chile
| | - Eva Vergara
- Center for Bioinformatics and Genome Biology, Centro Ciencia & Vida, Santiago, Chile
| | - Gonzalo Neira
- Center for Bioinformatics and Genome Biology, Centro Ciencia & Vida, Santiago, Chile
| | - David Holmes
- Center for Bioinformatics and Genome Biology, Centro Ciencia & Vida, Santiago, Chile
- Facultad de Medicina y Ciencias, Universidad San Sebastián, Santiago, Chile
- *Correspondence: David S. Holmes,
| | - Elizabeth Watkin
- Curtin Medical School, Curtin University, Perth, WA, Australia
- Elizabeth Watkin,
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Verma M, Bhaduri GA, Phani Kumar VS, Deshpande PA. Biomimetic Catalysis of CO 2 Hydration: A Materials Perspective. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c06203] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Manju Verma
- Department of Chemical Engineering, Motilal Nehru National Institute of Technology Allahabad, Prayagraj 211004, India
| | - Gaurav A. Bhaduri
- Department of Chemical Engineering, Indian Institute of Technology Jammu, Jammu and Kashmir, 181221, India
| | - V. Sai Phani Kumar
- Quantum and Molecular Engineering Laboratory, Department of Chemical Engineering Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Parag A. Deshpande
- Quantum and Molecular Engineering Laboratory, Department of Chemical Engineering Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
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Katuri KP, Kalathil S, Ragab A, Bian B, Alqahtani MF, Pant D, Saikaly PE. Dual-Function Electrocatalytic and Macroporous Hollow-Fiber Cathode for Converting Waste Streams to Valuable Resources Using Microbial Electrochemical Systems. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1707072. [PMID: 29707854 DOI: 10.1002/adma.201707072] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Indexed: 06/08/2023]
Abstract
Dual-function electrocatalytic and macroporous hollow-fiber cathodes are recently proposed as promising advanced material for maximizing the conversion of waste streams such as wastewater and waste CO2 to valuable resources (e.g., clean freshwater, energy, value-added chemicals) in microbial electrochemical systems. The first part of this progress report reviews recent developments in this type of cathode architecture for the simultaneous recovery of clean freshwater and energy from wastewater. Critical insights are provided on suitable materials for fabricating these cathodes, as well as addressing some challenges in the fabrication process with proposed strategies to overcome them. The second and complementary part of the progress report highlights how the unique features of this cathode architecture can solve one of the intrinsic bottlenecks (gas-liquid mass transfer limitation) in the application of microbial electrochemical systems for CO2 reduction to value-added products. Strategies to further improve the availability of CO2 to microbial catalysts on the cathode are proposed. The importance of understanding microbe-cathode interactions, as well as electron transfer mechanisms at the cathode-cell and cell-cell interface to better design dual-function macroporous hollow-fiber cathodes, is critically discussed with insights on how the choice of material is important in facilitating direct electron transfer versus mediated electron transfer.
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Affiliation(s)
- Krishna P Katuri
- Biological and Environmental Sciences and Engineering (BESE) Division, Water Desalination and Reuse Center (WDRC), King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Shafeer Kalathil
- Biological and Environmental Sciences and Engineering (BESE) Division, Water Desalination and Reuse Center (WDRC), King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Ala'a Ragab
- Biological and Environmental Sciences and Engineering (BESE) Division, Water Desalination and Reuse Center (WDRC), King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Bin Bian
- Biological and Environmental Sciences and Engineering (BESE) Division, Water Desalination and Reuse Center (WDRC), King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Manal F Alqahtani
- Biological and Environmental Sciences and Engineering (BESE) Division, Water Desalination and Reuse Center (WDRC), King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Deepak Pant
- Separation and Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, Mol, 2400, Belgium
| | - Pascal E Saikaly
- Biological and Environmental Sciences and Engineering (BESE) Division, Water Desalination and Reuse Center (WDRC), King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
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7
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Faridi S, Satyanarayana T. Thermo-alkali-stable α-carbonic anhydrase of Bacillus halodurans: heterologous expression in Pichia pastoris and applicability in carbon sequestration. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:6838-6849. [PMID: 29264861 DOI: 10.1007/s11356-017-0820-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 11/21/2017] [Indexed: 06/07/2023]
Abstract
Recombinant α-carbonic anhydrase of the polyextremophilic bacterium Bacillus halodurans TSLV1 (rBhCA) has been produced extracellularly in active form in Pichia pastoris under methanol inducible (AOX1) as well as constitutive (GAP) promoters. A marked improvement in rBhCA production was achieved by developing a P. pastoris recombinant that produces rBhCA constitutively as compared to that under inducible promoter. The purified rBhCA from P. pastoris is a glycosylated protein that displays a higher molecular mass (79.5 kDa) than that produced from E. coli recombinant (75 kDa); the former has a Tm of 75 °C, which is slightly higher than that of the latter (72 °C). The former rBhCA exhibits higher thermostability than the latter. The former sequestered CO2 efficiently similar to that of the native BhCA and the latter. This is the first report on the production of recombinant carbonic anhydrase extracellularly in P. pastoris.
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Affiliation(s)
- Shazia Faridi
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Tulasi Satyanarayana
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India.
- Division of Biological Sciences and Engineering, Netaji Subhas Institute of Technology (University of Delhi), Azad Hind Fauz Marg, Sector 3 Dwarka, New Delhi, 110078, India.
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8
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Sala L, Ores JDC, Moraes CC, Kalil SJ. Simultaneous production of phycobiliproteins and carbonic anhydrase by Spirulina platensis
LEB-52. CAN J CHEM ENG 2018. [DOI: 10.1002/cjce.23131] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Luisa Sala
- Federal University of Rio Grande; Chemistry and Food School; Rio Grande RS Brazil
| | - Joana da Costa Ores
- Federal University of Rio Grande; Chemistry and Food School; Rio Grande RS Brazil
| | | | - Susana Juliano Kalil
- Federal University of Rio Grande; Chemistry and Food School; Rio Grande RS Brazil
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9
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Bose H, Satyanarayana T. Utility of thermo-alkali-stable γ-CA from polyextremophilic bacterium Aeribacillus pallidus TSHB1 in biomimetic sequestration of CO 2 and as a virtual peroxidase. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:10869-10884. [PMID: 28293826 DOI: 10.1007/s11356-017-8739-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Accepted: 03/01/2017] [Indexed: 06/06/2023]
Abstract
Aeribacillus pallidus TSHB1 polyextremophilic bacterium produces a γ-carbonic anhydrase (ApCA), which is a homotrimeric biocatalyst with a subunit molecular mass of 32 ± 2 kDa. The enzyme is stable in the pH range between 8.0 and 11.0 and thus alkali-stable and moderately thermostable with T1/2 values of 40 ± 1, 15 ± 1, and 8 ± 0.5 min at 60, 70, and 80 °C, respectively. Activation energy for irreversible inactivation "E d " of carbonic anhydrase is 67.119 kJ mol-1. The enzyme is stable in the presence of various flue gas contaminants such as SO32-,SO42-, and NO3- and cations Mg2+, Mn2+, Ca2+, and Ba2+. Fluorescence studies in the presence of N-bromosuccinimide and fluorescence quenching using KI and acrylamide revealed the importance of tryptophan residues in maintaining the structural integrity of the enzyme. ApCA is more efficient than the commercially available bovine carbonic anhydrase (BCA) in CO2 sequestration. The enzyme was successfully used in biomineralization of CO2 from flue gas. Replacement of active site Zn2+ with Mn2+ enabled ApCA to function as a peroxidase which exhibited alkali-stability and moderate thermostability like ApCA.
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Affiliation(s)
- Himadri Bose
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Tulasi Satyanarayana
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India.
- Netaji Subhas Institute of Technology, Azad Hind Fauz Marg, Sector 3, Dwarka, New Delhi, 110078, India.
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10
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Budzianowski WM. Useful Mechanisms, Energy Efficiency Benefits, and Challenges of Emerging Innovative Advanced Solvent Based Capture Processes. GREEN ENERGY AND TECHNOLOGY 2017. [DOI: 10.1007/978-3-319-47262-1_4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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11
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Introduction to Carbon Dioxide Capture by Gas–Liquid Absorption in Nature, Industry, and Perspectives for the Energy Sector and Beyond. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/978-3-319-47262-1_1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
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12
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Ores JDC, Amarante MCAD, Kalil SJ. Co-production of carbonic anhydrase and phycobiliproteins by Spirulina sp. and Synechococcus nidulans. BIORESOURCE TECHNOLOGY 2016; 219:219-227. [PMID: 27494103 DOI: 10.1016/j.biortech.2016.07.133] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 07/28/2016] [Accepted: 07/29/2016] [Indexed: 05/24/2023]
Abstract
The aim of this work was to study the co-production of the carbonic anhydrase, C-phycocyanin and allophycocyanin during cyanobacteria growth. Spirulina sp. LEB 18 demonstrated a high potential for simultaneously obtaining the three products, achieving a carbonic anhydrase (CA) productivity of 0.97U/L/d and the highest C-phycocyanin (PC, 5.9μg/mL/d) and allophycocyanin (APC, 4.3μg/mL/d) productivities. In the extraction study, high extraction yields were obtained from Spirulina using an ultrasonic homogenizer (CA: 25.5U/g; PC: 90mg/g; APC: 70mg/g). From the same biomass, it was possible to obtain three biomolecules that present high industrial value.
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Affiliation(s)
- Joana da Costa Ores
- Universidade Federal do Rio Grande, Escola de Química e Alimentos, PO Box 474, Rio Grande, RS 96203-900, Brazil
| | | | - Susana Juliano Kalil
- Universidade Federal do Rio Grande, Escola de Química e Alimentos, PO Box 474, Rio Grande, RS 96203-900, Brazil.
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13
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Ores JDC, Amarante MCAD, Fernandes SS, Kalil SJ. Production of carbonic anhydrase by marine and freshwater microalgae. BIOCATAL BIOTRANSFOR 2016. [DOI: 10.1080/10242422.2016.1227793] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Faridi S, Satyanarayana T. Characteristics of recombinant α-carbonic anhydrase of polyextremophilic bacterium Bacillus halodurans TSLV1. Int J Biol Macromol 2016; 89:659-68. [DOI: 10.1016/j.ijbiomac.2016.05.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Revised: 05/06/2016] [Accepted: 05/07/2016] [Indexed: 11/25/2022]
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15
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Faridi S, Satyanarayana T. Novel alkalistable α-carbonic anhydrase from the polyextremophilic bacterium Bacillus halodurans: characteristics and applicability in flue gas CO2 sequestration. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:15236-15249. [PMID: 27102616 DOI: 10.1007/s11356-016-6642-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 04/04/2016] [Indexed: 06/05/2023]
Abstract
The emissions of CO2 into the atmosphere have been constantly rising due to anthropogenic activities, which have led to global warming and climate change. Among various methods proposed for mitigating CO2 levels in the atmosphere, carbonic anhydrase (CA)-mediated carbon sequestration represents a greener and safer approach to capture and convert it into stable mineral carbonates. Despite the fact that CA is an extremely efficient metalloenzyme that catalyzes the hydration of CO2 (CO2 + H2O ↔ HCO3 (-) + H(+)) with a kcat of ∼10(6) s(-1), a thermostable, and alkalistable CA is desirable for the process to take place efficiently. The purified CA from alkaliphilic, moderately thermophilic, and halotolerant Bacillus halodurans TSLV1 (BhCA) is a homodimeric enzyme with a subunit molecular mass of ~37 kDa with stability in a broad pH range between 6.0 and 11.0. It has a moderate thermostability with a T1/2 of 24.0 ± 1.0 min at 60 °C. Based on the sensitivity of CA to specific inhibitors, BhCA is an α-CA; this has been confirmed by nucleotide/amino acid sequence analysis. This has a unique property of stimulation by SO4 (2-), and it remains unaffected by SO3 (2-), NOx, and most other components present in the flue gas. BhCA is highly efficient in accelerating the mineralization of CO2 as compared to commercial bovine carbonic anhydrase (BCA) and is also efficient in the sequestration of CO2 from the exhaust of petrol driven car, thus, a useful biocatalyst for sequestering CO2 from flue gas.
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Affiliation(s)
- Shazia Faridi
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - T Satyanarayana
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India.
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16
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Transcriptome profiling of the microalga Chlorella pyrenoidosa in response to different carbon dioxide concentrations. Mar Genomics 2016; 29:81-87. [PMID: 27209568 DOI: 10.1016/j.margen.2016.05.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 04/11/2016] [Accepted: 05/03/2016] [Indexed: 11/21/2022]
Abstract
To enrich our knowledge of carbon dioxide (CO2)-concentrating mechanism (CCM) in eukaryotic algae, we used high-throughput sequencing to investigate the transcriptome profiling of the microalga Chlorella pyrenoidosa (Chlorophyta) response to different CO2 levels. Altogether, 53.86 million (M) and 62.10M clean short reads of 100 nucleotides (nt) were generated from this microalga cultured at 4-fold air CO2 (control) and air CO2 concentrations by Illumina sequencing. A total of 32,662 unigenes were assembled from the two pooled samples. With an E-value cut-off of 1e-5, 9590, 6782, 5954, and 9092 unigenes were annotated in NR, Gene Ontology (GO), Eukaryotic Cluster of Orthologous Groups of proteins (KOG), and Kyoto Encyclopedia of Genes and Genomes (KEGG) databases, respectively. After screening, 51 differentially expressed unigenes were up-regulated and 8 were down-regulated in the air CO2 group, relative to the control. The transcript levels of eight differentially expressed unigenes were validated by real-time quantitative PCR, which manifested that thioredoxin-like protein, laminin subunit beta-1, and chlorophyll a/b binding protein might be associated with the utilization of inorganic carbon at low CO2 levels.
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Glaser R. RuBisCO-Inspired Biomimetic Approaches to Reversible CO 2Capture from Air. ACS SYMPOSIUM SERIES 2015. [DOI: 10.1021/bk-2015-1194.ch011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Rainer Glaser
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211, and Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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18
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Vaquero I, Vázquez M, Ruiz-Domínguez M, Vílchez C. Enhanced production of a lutein-rich acidic environment microalga. J Appl Microbiol 2014; 116:839-50. [DOI: 10.1111/jam.12428] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 12/02/2013] [Accepted: 12/18/2013] [Indexed: 11/29/2022]
Affiliation(s)
- I. Vaquero
- Algal Biotechnology Group, International Centre for Environmental Research (CIECEM); Almonte Spain
| | - M. Vázquez
- Algal Biotechnology Group, International Centre for Environmental Research (CIECEM); Almonte Spain
| | - M.C. Ruiz-Domínguez
- Algal Biotechnology Group, International Centre for Environmental Research (CIECEM); Almonte Spain
| | - C. Vílchez
- Algal Biotechnology Group, International Centre for Environmental Research (CIECEM); Almonte Spain
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Abstract
Carbonic anhydrases (CAs) catalyze a fundamental reaction: the reversible hydration and dehydration of carbon dioxide (CO2) and bicarbonate ([Formula: see text]), respectively. Current methods for CO2 capture and sequestration are harsh, expensive, and require prohibitively large energy inputs, effectively negating the purpose of removing CO2 from the atmosphere. Due to CA's activity on CO2 there is increasing interest in using CAs for industrial applications such as carbon sequestration and biofuel production. A lot of work in the last decade has focused on immobilizing CA onto various supports for incorporation into CO2 scrubbing applications or devices. Although the proof of principle has been validated, current CAs being tested do not withstand the harsh industrial conditions. The advent of large-scale genome sequencing projects has resulted in several emerging efforts seeking out novel CAs from a variety of microorganisms, including bacteria, micro-, and macro-algae. CAs are also being investigated for their use in medical applications, such drug delivery systems and artificial lungs. This review also looks at possible downstream uses of captured and sequestered CO2, from using it to enhance oil recovery to incorporating it into useful and financially viable products.
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Affiliation(s)
- Javier M González
- Bioscience Division, Los Alamos National Laboratory, Los Alamos, NM, USA,
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