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Baharlounezhad F, Mohammadi MA. Nitrite manipulation in water by structure change of plasma electrolysis reactor. Sci Rep 2024; 14:23175. [PMID: 39369104 PMCID: PMC11455958 DOI: 10.1038/s41598-024-75046-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Accepted: 10/01/2024] [Indexed: 10/07/2024] Open
Abstract
In this study, experimental reactors for cathodic nitrogen plasma electrolysis were designed by the composition of galvanic (voltaic) and electrolytic cells with wide and narrow connectors filled with tap water and agar solutions. The designed reactor can be used to simultaneously perform and manage nitrification in acidic and alkaline environments. According to the reactor's performance, it can be installed on the irrigation system and used depending on the soil pH of the fields for delivering water and nitrogen species that are effective in growth. The nitrification process was investigated by choosing the optimal reactor with a wide connector based on different changes in oxidation-reduction potential and pH on the anode and cathode sides. The nitrite concentration changed directly with ammonium and nitrate concentrations on the cathode side. It changed inversely and directly with ammonium and nitrate concentrations on the anode side respectively. Nitrite concentration decreased from 5.387 ppm with water connector, to 0.326 ppm with 20% agar solution, and 0.314 ppm with 30% agar solution connectors on the anode side. It increased from 0 ppm to 0.191 ppm with a water connector, 0.405 ppm with 20% agar solution, and 7.454 ppm with 30% agar solution connectors on the cathode side.
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Affiliation(s)
| | - Mohammad Ali Mohammadi
- Faculty of Physics, University of Tabriz, Tabriz, Iran
- Research Institute of Applied Physics & Astronomy, University of Tabriz, Tabriz, Iran
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2
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Sahoo S, Saha A, Vijaykumar ME, Khan MF, Samanta S, Mol SS, Das BK. Assessment of water quality of Netravathi-Gurupur estuary, India through chemometric approach for fisheries sustainability. MARINE POLLUTION BULLETIN 2024; 200:116043. [PMID: 38278014 DOI: 10.1016/j.marpolbul.2024.116043] [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: 08/29/2023] [Revised: 01/11/2024] [Accepted: 01/11/2024] [Indexed: 01/28/2024]
Abstract
The present study aimed to assess the water quality dynamics (physicochemical properties, nutrient and chlorophyll-a) in the Netravathi-Gurupur estuary, India across the space and seasons and to simplify the complex water quality dataset through a chemometric approach. The results indicated that pH, EC, temperature, alkalinity, salinity, TDS, hardness, chloride and intense mixing of suspended solids, driven by the semidiurnal tides, are the major factors affecting water quality. Spatial heterogeneity and monsoon have profound impact on nutrient distribution revealing the following values (mg l-1): phosphate-P (0.015-0.105), nitrate-N (0.016-0.094), nitrite-N (0.001-0.012), and silicate (1.83-14.50). The estuary was evaluated for suitability for brackish water fisheries. The results indicated fair water quality during pre- and post-monsoon but marginal quality in monsoon, primarily due to dilution associated with reduced salinity. The outcome of this study can be suitably utilized for the sustainable development of estuaries and their feasibility for brackish water fisheries.
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Affiliation(s)
- Sonalika Sahoo
- Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore 560 089, India
| | - Ajoy Saha
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India.
| | - M E Vijaykumar
- Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore 560 089, India
| | - M Feroz Khan
- Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore 560 089, India
| | - S Samanta
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India
| | - Sibina S Mol
- Regional Centre of ICAR-Central Inland Fisheries Research Institute, Bangalore 560 089, India
| | - B K Das
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata 700 120, India
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3
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Advanced Monitoring and Control of Redox Potential in Wine Fermentation across Scales. FERMENTATION-BASEL 2022. [DOI: 10.3390/fermentation9010007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Combined with real-time monitoring of density and temperature, the control of the redox potential provides a new approach to influencing cell metabolism during growth, cell viability and non-growing yeast activity in wine fermentations. Prior research indicates that the problem of sluggish and incomplete fermentation can be alleviated by maintaining a constant redox potential during the ethanol fermentation. A secondary trait of hydrogen sulfide formation from elemental sulfur also seems to be associated with the development of low redox potentials during fermentation and this might be prevented by the deliberate control of redox potentials in a certain range. While the control of the redox potential during wine fermentations has been demonstrated previously at the research scale (100 L), the ability to control it in larger volumes typically seen in commercial conditions remained unanswered. Wine fermentations from the same load of Cabernet Sauvignon grapes from the 2021 harvest were conducted at three volumes: 100 L and 1500 L in a research winery and 10,000 L in a commercial winery. Using only pulses of air delivery, the redox potential was successfully controlled to −40 mV referenced to a silver/silver chloride electrode throughout the fermentations, at all scales. This appears to be the first published result of a controlled fermentation trial that includes the commercial scale and demonstrates the scalability of control of redox potential in wine fermentations.
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4
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Gh. Ebraheim, Karbassi AR, Mehrdadi N. Employing a Photo-Electrochemical Process to Improve Wastewater Quality in Tehran, Iran. J WATER CHEM TECHNO+ 2022. [DOI: 10.3103/s1063455x22060042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Electrolyzed-Reduced Water: Review I. Molecular Hydrogen Is the Exclusive Agent Responsible for the Therapeutic Effects. Int J Mol Sci 2022; 23:ijms232314750. [PMID: 36499079 PMCID: PMC9738607 DOI: 10.3390/ijms232314750] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/16/2022] [Accepted: 11/18/2022] [Indexed: 11/29/2022] Open
Abstract
Numerous benefits have been attributed to alkaline-electrolyzed-reduced water (ERW). Sometimes these claims are associated with easily debunked concepts. The observed benefits have been conjectured to be due to the intrinsic properties of ERW (e.g., negative oxidation-reduction potential (ORP), alkaline pH, H2 gas), as well enigmatic characteristics (e.g., altered water structure, microclusters, free electrons, active hydrogen, mineral hydrides). The associated pseudoscientific marketing has contributed to the reluctance of mainstream science to accept ERW as having biological effects. Finally, through many in vitro and in vivo studies, each one of these propositions was examined and refuted one-by-one until it was conclusively demonstrated that H2 was the exclusive agent responsible for both the negative ORP and the observed therapeutic effects of ERW. This article briefly apprised the history of ERW and comprehensively reviewed the sequential research demonstrating the importance of H2. We illustrated that the effects of ERW could be readily explained by the known biological effects of H2 and by utilizing conventional chemistry without requiring any metaphysical conjecture (e.g., microclustering, free electrons, etc.) or reliance on implausible notions (e.g., alkaline water neutralizes acidic waste). The H2 concentration of ERW should be measured to ensure it is comparable to those used in clinical studies.
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6
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Miran W, Huang W, Long X, Imamura G, Okamoto A. Multivariate landscapes constructed by Bayesian estimation over five hundred microbial electrochemical time profiles. PATTERNS (NEW YORK, N.Y.) 2022; 3:100610. [PMID: 36419444 PMCID: PMC9676538 DOI: 10.1016/j.patter.2022.100610] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 08/24/2022] [Accepted: 09/21/2022] [Indexed: 11/07/2022]
Abstract
Data science emerges as a promising approach for studying and optimizing complex multivariable phenomena, such as the interaction between microorganisms and electrodes. However, there have been limited reports on a bioelectrochemical system that can produce a reliable database until date. Herein, we developed a high-throughput platform with low deviation to apply two-dimensional (2D) Bayesian estimation for electrode potential and redox-active additive concentration to optimize microbial current production (I c ). A 96-channel potentiostat represents <10% SD for maximum I c . 576 time-I c profiles were obtained in 120 different electrolyte and potentiostatic conditions with two model electrogenic bacteria, Shewanella and Geobacter. Acquisition functions showed the highest performance per concentration for riboflavin over a wide potential range in Shewanella. The underlying mechanism was validated by electrochemical analysis with mutant strains lacking outer-membrane redox enzymes. We anticipate that the combination of data science and high-throughput electrochemistry will greatly accelerate a breakthrough for bioelectrochemical technologies.
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Affiliation(s)
- Waheed Miran
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- School of Chemical and Materials Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan
| | - Wenyuan Huang
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, North 13 West 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Xizi Long
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Gaku Imamura
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Graduate School of Information Science and Technology, Osaka University, 1-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Akihiro Okamoto
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, North 13 West 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
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Moni SS, Sultan MH, Alshahrani S, Tripathi P, Assiri A, Alqahtani SS, Bakkari MA, Madkhali OA, Alam MF, Alqahtani AH, Tripathi R, Pancholi SS, Ashafaq M, Elmobark ME. Physical characterization and wound healing properties of Zamzam water. BRAZ J BIOL 2022; 82:e262815. [PMID: 35976285 DOI: 10.1590/1519-6984.262815] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 07/23/2022] [Indexed: 01/06/2023] Open
Abstract
The objective of the study was to evaluate the quality of Zamzam water, holy water for Muslims and consumed for its medicinal value. The present study demonstrates the physicochemical characterization and wound healing property of Zamzam water. The physicochemical characterization of Zamzam water samples was analyzed for dissolved oxygen, pH, conductivity, total dissolved solids, redox potential, zeta potential, polydispersity index, and zeta size. The microbial quality of Zamzam water was also assessed by exposing water samples to open air. In this work, Zamzam water was also screened for the medicinal value through wound healing properties in Wistar rats. Zamzam water exhibited a unique physicochemical characterization with high levels of dissolved oxygen, zeta potential, polydispersity index, redox potential, total dissolved solids, and conductivity before exposure to open air. After open air exposure, Zamzam water resisted the growth of bacteria. The wound healing properties of Zamzam water in vivo showed a 96% of healing effect on 12th day observation. The wound healing was achieved by modulating pro-inflammatory cytokine such as interleukin -1β (IL-1β), interleukin-6 (IL-6), and tumor necrosis factor -α (TNF-α). Followed by the level of apoptosis markers caspase-9 and caspase-3 were reduced. The present study proved that Zamzam water is a good-quality water and showed excellent wound healing property. Therefore, Zamzam water can be used for pharmaceutical formulations.
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Affiliation(s)
- S S Moni
- Jazan University, College of Pharmacy, Department of Pharmaceutics, Jazan, Kingdom of Saudi Arabia
| | - M H Sultan
- Jazan University, College of Pharmacy, Department of Pharmaceutics, Jazan, Kingdom of Saudi Arabia
| | - S Alshahrani
- Jazan University, College of Pharmacy, Department of Pharmacology and Toxicology, Jazan, Kingdom of Saudi Arabia
| | - P Tripathi
- Jazan University, College of Pharmacy, Department of Pharmacology and Toxicology, Jazan, Kingdom of Saudi Arabia
| | - A Assiri
- King Khalid University, College of Pharmacy, Department of Clinical Pharmacy, Abha, Kingdom of Saudi Arabia
| | - S S Alqahtani
- Jazan University, College of Pharmacy, Department of Pharmacy Practice, Jazan, Kingdom of Saudi Arabia.,Jazan University, College of Pharmacy, Pharmacy Practice Research Unit, Jazan, Kingdom of Saudi Arabia
| | - M A Bakkari
- Jazan University, College of Pharmacy, Department of Pharmaceutics, Jazan, Kingdom of Saudi Arabia
| | - O A Madkhali
- Jazan University, College of Pharmacy, Department of Pharmaceutics, Jazan, Kingdom of Saudi Arabia
| | - M F Alam
- Jazan University, College of Pharmacy, Department of Pharmacology and Toxicology, Jazan, Kingdom of Saudi Arabia
| | - A H Alqahtani
- Al- Dawaa Medical Services, Co Ltd, Riyadh, Kingdom of Saudi Arabia
| | - R Tripathi
- Jazan University, College of Pharmacy, Department of Pharmacy Practice, Jazan, Kingdom of Saudi Arabia
| | - S S Pancholi
- Jazan University, College of Pharmacy, Department of Pharmaceutics, Jazan, Kingdom of Saudi Arabia.,Ganpat University, S. K. Patel College of Pharmaceutical Education and Research, Mahesana, Gujarat, India
| | - M Ashafaq
- Jazan University, College of Pharmacy, Department of Pharmacology and Toxicology, Jazan, Kingdom of Saudi Arabia
| | - M E Elmobark
- Jazan University, College of Pharmacy, Department of Pharmaceutics, Jazan, Kingdom of Saudi Arabia
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Nightingale J, Carter L, Sinclair CJ, Rooney P, Kay P. The effect of anaerobic pig slurry redox potentials on the degradation of veterinary medicines. CHEMOSPHERE 2022; 296:133872. [PMID: 35134402 DOI: 10.1016/j.chemosphere.2022.133872] [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: 09/15/2021] [Revised: 01/11/2022] [Accepted: 02/02/2022] [Indexed: 06/14/2023]
Abstract
Veterinary medicines are frequently used within intensive livestock husbandry and there has been a growing interest regarding their fate in the environment. However, research has seldom assessed the influence of pig slurry properties on the fate of veterinary medicines even though such an understanding is essential for a more robust environmental risk assessment. Changes within manure degradation rates have the potential to alter the concentration of antibiotics applied to land, and the outcome of the risk assessment. The aim of this work was to investigate whether commonly reported redox potentials affect the degradation rates of acetyl-salicylic acid, ceftiofur, florfenicol, oxytetracycline, sulfamethoxazole, and tylosin. The employed redox potentials were -100 mV (reduced), -250 mV (anaerobic) and -400 mV (very anaerobic). A compound specific relationship was observed where the degradation of ceftiofur, florfenicol, oxytetracycline and sulfamethoxazole was inhibited under reduced conditions over that of very anaerobic; the respective DT50 values were 0.7-1.84 h, 1.35-3.61 h, 22.2-49.8 h, 131-211 h and 35.4-94 h. In contrast, tylosin was found to degrade faster at reduced conditions over very anaerobic (DT50 6.88-19.4 h). The presented research demonstrates the importance of redox potential on degradation rates and suggests we need stringent and harmonized redox control to improve the environmental risk assessment of veterinary medicines. Environmental relevance and significance: Given the significant effect of anaerobic redox potentials on veterinary medicine fate tighter regulation is required in manure degradation trials.
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Affiliation(s)
- John Nightingale
- Fera Science Ltd, CCSS, York, YO41 1LZ, UK; University of Leeds, Geography, Leeds, LS2 9JT, UK.
| | - Laura Carter
- University of Leeds, Geography, Leeds, LS2 9JT, UK.
| | | | | | - Paul Kay
- University of Leeds, Geography, Leeds, LS2 9JT, UK.
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9
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Pereao O, Akharame MO, Opeolu B. Effects of municipal wastewater treatment plant effluent quality on aquatic ecosystem organisms. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:1480-1489. [PMID: 34870555 DOI: 10.1080/10934529.2021.2009730] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 06/13/2023]
Abstract
The management and quality monitoring of wastewater have an important role in sustainable development. A recent approach in environmental protection involves the ecotoxicological assessment of effluents to complement the usual chemical evaluations. This study assessed the impacts of wastewater treatment plant (WWTP) effluent quality in a location in Western Cape province, South Africa using organisms that bear different ecosystem-level function responsibilities like the Pseudokirchneriella subcapitata (microalgae), Daphnia magna (crustaceans), and Tetrahymena thermophila (protozoan) in addition to the physicochemical parameters. The effluent showed values of chemical oxygen demand (COD; 41-83 mg L-1), dissolved oxygen (DO; 2.7-3.1 mg L-1), Redox potential (189-265 mV), and total dissolved solids (TDS; 656-718 ppm). The protozoan Tetrahymena thermophila ecotoxicity test exhibited toxic effects of the effluents within 24-h with a mean lethal value (LC50) of 1.12% for the winter season. The findings of this study revealed that analyzed physicochemical parameters are within the regulatory water quality acceptable standard thresholds with few exceptions, while the biotests were able to determine the toxicity levels and sensitivities of each test. The results showed that the WWTP whole effluent exerted toxicity to test organisms, but dilution can mitigate the effects considerably. The use of ecotoxicological assessment methods for municipal WWTP effluent may enhance existing water management strategies.
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Affiliation(s)
- Omoniyi Pereao
- Environmental Chemistry and Toxicology Research Group, Department of Environmental and Occupational Studies, Faculty of Applied Sciences, Cape Peninsula University of Technology, Bellville, South Africa
- Federal Ministry of Education, Federal Secretarial Phase III, Abuja, FCT, Nigeria
| | - Michael Ovbare Akharame
- Department of Chemistry, Faculty of Applied Sciences, Cape Peninsula University of Technology, Cape Town, South Africa
| | - Beatrice Opeolu
- Environmental Chemistry and Toxicology Research Group, Department of Environmental and Occupational Studies, Faculty of Applied Sciences, Cape Peninsula University of Technology, Bellville, South Africa
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Walker GA, Nelson J, Halligan T, Lima MMM, Knoesen A, Runnebaum RC. Monitoring Site-Specific Fermentation Outcomes via Oxidation Reduction Potential and UV-Vis Spectroscopy to Characterize "Hidden" Parameters of Pinot Noir Wine Fermentations. Molecules 2021; 26:4748. [PMID: 34443337 PMCID: PMC8400154 DOI: 10.3390/molecules26164748] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/16/2021] [Accepted: 07/26/2021] [Indexed: 11/17/2022] Open
Abstract
Real-time process metrics are standard for the majority of fermentation-based industries but have not been widely adopted by the wine industry. In this study, replicate fermentations were conducted with temperature as the main process parameter and assessed via in-line Oxidation Reduction Potential (ORP) probes and at-line profiling of phenolics compounds by UV-Vis spectroscopy. The California and Oregon vineyards used in this study displayed consistent vinification outcomes over five vintages and are representative of sites producing faster- and slower-fermenting musts. The selected sites have been previously characterized by fermentation kinetics, elemental profile, phenolics, and sensory analysis. ORP probes were integrated into individual fermentors to record how ORP changed throughout the fermentation process. The ORP profiles generally followed expected trends with deviations revealing previously undetectable process differences between sites and replicates. Site-specific differences were also observed in phenolic and anthocyanin extraction. Elemental composition was also analyzed for each vineyard, revealing distinctive profiles that correlated with the fermentation kinetics and may influence the redox status of these wines. The rapid ORP responses observed related to winemaking decisions and yeast activity suggest ORP is a useful process parameter that should be tracked in addition to Brix, temperature, and phenolics extraction for monitoring fermentations.
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Affiliation(s)
- Gordon A. Walker
- Department of Viticulture & Enology, University of California, Davis, CA 95616, USA; (G.A.W.); (M.M.M.L.)
| | - James Nelson
- Department of Electrical and Computer Engineering, University of California, Davis, CA 95616, USA; (J.N.); (A.K.)
| | - Thomas Halligan
- Department of Chemical Engineering, University of California, Davis, CA 95616, USA;
| | - Maisa M. M. Lima
- Department of Viticulture & Enology, University of California, Davis, CA 95616, USA; (G.A.W.); (M.M.M.L.)
| | - Andre Knoesen
- Department of Electrical and Computer Engineering, University of California, Davis, CA 95616, USA; (J.N.); (A.K.)
| | - Ron C. Runnebaum
- Department of Viticulture & Enology, University of California, Davis, CA 95616, USA; (G.A.W.); (M.M.M.L.)
- Department of Chemical Engineering, University of California, Davis, CA 95616, USA;
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de Bruyn WJ, Clark CD, Harrison AW, Senstad M, Hok S. The degradation of acetaldehyde in estuary waters in Southern California, USA. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:35811-35821. [PMID: 33675494 DOI: 10.1007/s11356-021-13232-x] [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: 12/29/2020] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
Acetaldehyde plays an important role in oxidative cycles in the troposphere. Estimates of its air-water flux are important in global models. Biological degradation is believed to be the dominant loss process in water, but there have been few measurements, none in estuaries. Acetaldehyde degradation rates were measured in surface waters at the inflow to the Upper Newport Back Bay estuary in Orange County, Southern California, USA, over a 6-month period including the rainy winter season. Deuterated acetaldehyde was added to filtered and unfiltered water samples incubated in glass syringes, and its loss analyzed by purge and trap gas chromatography mass spectrometry. Filtered samples showed no significant degradation, suggesting that particle-mediated degradation is the dominant removal process. Correlation between measured degradation rate constants in unfiltered incubations and bacteria counts suggests the loss is due to microorganisms. Degradation in unfiltered samples followed first-order kinetics, with rate constants ranging from 0.0006 to 0.025 min-1 (k; average 0.0043 ± 0.006 min-1). Turnover (1/k) ranged from 40 to 1667 min, consistent with prior studies in coastal waters. Acetaldehyde concentrations in the estuary are estimated to range from 30 to ~500 nM (average ~250 nM). Results suggest the estuary is a source of acetaldehyde to the atmosphere.
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Affiliation(s)
- Warren J de Bruyn
- Department of Chemistry and Biochemistry, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, CA, 98266, USA
| | - Catherine D Clark
- Department of Chemistry, College of Science and Engineering, Western Washington University, 516 High Street, Bellingham, WA, 98225, USA.
| | - Aaron W Harrison
- Department of Chemistry and Biochemistry, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, CA, 98266, USA
| | - Mary Senstad
- Department of Chemistry and Biochemistry, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, CA, 98266, USA
| | - Sovanndara Hok
- Department of Chemistry and Biochemistry, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, CA, 98266, USA
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12
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Melnik LO, Vakulenko VF, Saprykina MM, Sova AM. Change of the Oxidation-Reduction Potential of Model and Natural Waters in the Ozone Disinfection Process. J WATER CHEM TECHNO+ 2021. [DOI: 10.3103/s1063455x21010094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Freeman CJ, Ullah B, Islam MS, Collinson MM. Potentiometric Biosensing of Ascorbic Acid, Uric Acid, and Cysteine in Microliter Volumes Using Miniaturized Nanoporous Gold Electrodes. BIOSENSORS-BASEL 2020; 11:bios11010010. [PMID: 33379137 PMCID: PMC7823660 DOI: 10.3390/bios11010010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 12/13/2020] [Accepted: 12/21/2020] [Indexed: 02/04/2023]
Abstract
Potentiometric redox sensing is a relatively inexpensive and passive approach to evaluate the overall redox state of complex biological and environmental solutions. The ability to make such measurements in ultra-small volumes using high surface area, nanoporous electrodes is of particular importance as such electrodes can improve the rates of electron transfer and reduce the effects of biofouling on the electrochemical signal. This work focuses on the fabrication of miniaturized nanoporous gold (NPG) electrodes with a high surface area and a small footprint for the potentiometric redox sensing of three biologically relevant redox molecules (ascorbic acid, uric acid, and cysteine) in microliter volumes. The NPG electrodes were inexpensively made by attaching a nanoporous gold leaf prepared by dealloying 12K gold in nitric acid to a modified glass capillary (1.5 mm id) and establishing an electrode connection with copper tape. The surface area of the electrodes was ~1.5 cm2, providing a roughness factor of ~16 relative to the geometric area of 0.09 cm2. Scanning electron microscopy confirmed the nanoporous framework. A linear dependence between the open-circuit potential (OCP) and the logarithm of concentration (e.g., Nernstian-like behavior) was obtained for all three redox molecules in 100 μL buffered solutions. As a first step towards understanding a real system, the response associated with changing the concentration of one redox species in the presence of the other two was examined. These results show that at NPG, the redox potential of a solution containing biologically relevant concentrations of ascorbic acid, uric acid, and cysteine is strongly influenced by ascorbic acid. Such information is important for the measurement of redox potentials in complex biological solutions.
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Affiliation(s)
- Christopher J. Freeman
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529, USA;
| | - Borkat Ullah
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284, USA; (B.U.); (M.S.I.)
| | - Md. Shafiul Islam
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284, USA; (B.U.); (M.S.I.)
| | - Maryanne M. Collinson
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284, USA; (B.U.); (M.S.I.)
- Correspondence:
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Pathak AK, Kantharajan G, Saini VP, Kumar R, Dayal R, Mohindra V, Lal KK. Fish community and habitat diversity profiling of Luni, an ephemeral saline river from Thar Desert of India for conservation and management. COMMUNITY ECOL 2020. [DOI: 10.1007/s42974-020-00033-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Yang Y, Zhang X, Xiao J, Chu S, Huang Z. Nutrient removal by Rotala rotundifolia: a superior candidate for ecosystem remediation at low temperatures. RSC Adv 2020; 10:29139-29146. [PMID: 35521131 PMCID: PMC9055945 DOI: 10.1039/d0ra03405c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 07/20/2020] [Indexed: 11/30/2022] Open
Abstract
Temperature is an extremely important factor affecting the nutrient (mainly nitrogen and phosphorus) removal of aquatic macrophytes. A novel submersed Rotala rotundifolia was separately cultivated at room and low temperatures to investigate its ability for nutrient removal. The physiological metabolism was analyzed to explore the mechanism of removing nutrients under a wide temperature range. The results showed that the removal efficiency (RE) of nutrients at low temperature was competitive with that obtained at normal temperature, demonstrating that temperature exerted no obvious influence on the nutrient removal by R. rotundifolia. The root vitality at 5 °C rose from the initial 0.26 to 1.5 mg g−1 h−1, whereas it fell by 38.66% at 10 °C, 28.74% at 20 °C and 5.15% at 30 °C. The peroxidase (POD) activity at 5 °C showed the maximum value on day 7 followed by a notable decline on day 21. All the peak values of soluble sugar and protein as well as MDA showed up at 5 °C and they were 5.5, 437.9 and 10.1 mg g−1, respectively. Chlorophyll a and b reached 8.4 and 4.4 mg g−1 on day 28, respectively, with a total chlorophyll content (a plus b) of 12.4 mg g−1 at 5 °C, all of which were higher than that at 30 °C. These results validated that R. rotundifolia could be a superior candidate suitable for in situ application. Temperature is an extremely important factor affecting the nutrient (mainly nitrogen and phosphorus) removal of aquatic macrophytes.![]()
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Affiliation(s)
- Yunlong Yang
- College of Life and Environmental Science
- Wenzhou University
- Wenzhou 325035
- China
| | - Xiaying Zhang
- College of Life and Environmental Science
- Wenzhou University
- Wenzhou 325035
- China
| | - Jibo Xiao
- College of Life and Environmental Science
- Wenzhou University
- Wenzhou 325035
- China
- Wenzhou Chuangyuan Environment Technology Co. Ltd
| | - Shuyi Chu
- Wenzhou Academy of Agricultural Sciences
- Wenzhou 325006
- China
| | - Zhida Huang
- Wenzhou Institute of Industry & Science
- Wenzhou 325028
- China
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16
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Ascott MJ, Gooddy DC, Surridge BWJ. Public Water Supply Is Responsible for Significant Fluxes of Inorganic Nitrogen in the Environment. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:14050-14060. [PMID: 30339003 DOI: 10.1021/acs.est.8b03204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Understanding anthropogenic disturbance of macronutrient cycles is essential for assessing the risks facing ecosystems. For the first time, we quantified inorganic nitrogen (N) fluxes associated with abstraction, mains water leakage, and transfers of treated water related to public water supply. In England, the mass of nitrate-N removed from aquatic environments by abstraction (ABS-NO3-N) was estimated to be 24.2 kt N/year. This is equal to six times the estimates of organic N removal by abstraction, 15 times in-channel storage of organic N, and 30 times floodplain storage of organic N. ABS-NO3-N is also between 3 and 39% of N removal by denitrification in the hydrosphere. Mains water leakage of nitrate-N (MWL-NO3-N) returns 3.62 kt N/year to the environment, equating to approximately 15% of ABS-NO3-N. In urban areas, MWL-NO3-N can represent up to 20% of the total N inputs. MWL-NO3-N is predicted to increase by up to 66% by 2020 following implementation of treated water transfers. ABS-NO3-N and MWL-NO3-N should be considered in future assessments of N fluxes, in order to accurately quantify anthropogenic disturbances to N cycles. The methodology we developed is transferable, uses widely available datasets, and could be used to quantify N fluxes associated with public water supply across the world.
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Affiliation(s)
- Matthew J Ascott
- British Geological Survey , Maclean Building, Crowmarsh , Oxfordshire , United Kingdom , OX10 8BB
| | - Daren C Gooddy
- British Geological Survey , Maclean Building, Crowmarsh , Oxfordshire , United Kingdom , OX10 8BB
| | - Ben W J Surridge
- Lancaster Environment Centre , Lancaster University , Lancaster , United Kingdom , LA1 4YQ
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17
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Treatment of Eutrophic Water and Wastewater from Valsequillo Reservoir, Puebla, Mexico by Means of Ozonation: A Multiparameter Approach. WATER 2018. [DOI: 10.3390/w10121790] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The present work aims to elucidate the possibility of injecting ozone into surface waters combined with urban wastewaters in order to improve the water quality of the High Atoyac Sub-basin (HAS) in Central Mexico. For this purpose, twenty physicochemical parameters, eight heavy metals, seven organic compounds, and one biological indicator were assessed in water from different sites of the studied area (the Alseseca River, the Atoyac River and the Valsequillo Reservoir). Results demonstrated that O3 injection led to the decrease of the aromatic fraction of organic molecules since the Spectral Absorption Coefficient at 254 nanometers (SAC254) reduction was found to be 31.7% in the Valsequillo Reservoir water samples. Maximum Chemical Oxygen Demand (COD) removal was observed to be 60.2% from the Alseseca River with a 0.26 mg O3/mg initial COD dose. Among all the phthalates studied in the present work, Di(2-ethylhexyl) phthalate (DEHP) exhibited the highest concentration (5.8 μg/L in the Atoyac River). Treatment with O3 was not effective in eliminating fecal coliforms (FC) in waters that host high organic matter (OM) loads as opposed to waters with low OM. After the injection of 4.7 mg O3/mg COD in the VO3-AT water sample, a 90% removal of Iron (Fe) and Aluminum (Al) was registered; while Manganese (Mn), Nickel (Ni), Zinc (Zn), and Cooper (Cu) showed a 73%, 67%, 81%, and 80% removal, respectively; Chromium (Cr) registered the highest removal (~100%). The present work demonstrated that while finding a suitable O3 dose to improve the quality of water in the HAS, the 5-days Biochemical Oxygen Demand (BOD5)/COD ratio (i.e., biodegradability) is more important than the overall OM removal percentage proving that O3 injection is a feasible process for the treatment of eutrophic waters from HAS.
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18
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Khan RK, Gadiraju SP, Kumar M, Hatmaker GA, Fisher BJ, Natarajan R, Reiner JE, Collinson MM. Redox Potential Measurements in Red Blood Cell Packets Using Nanoporous Gold Electrodes. ACS Sens 2018; 3:1601-1608. [PMID: 30080040 DOI: 10.1021/acssensors.8b00498] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The redox potential of packed red blood cells (RBCs) was measured over a 56-day storage period using a newly developed potentiometric methodology consisting of a nanoporous gold electrode and a silver chloride coated silver reference electrode. Both milliliter- and microliter-sized volumes were separately evaluated. The addition of Vitamin C (VitC) in differing doses to the packed RBCs was also assessed as a means to improve redox stability and prolong storage duration. For RBCs containing only saline, the open-circuit potential (OCP) was ∼ -80 mV vs Ag/AgCl and drifted slightly with time; greater differences were also noted between different electrodes. The addition of exogenous VitC to the RBC shifts the OCP to more negative values, stabilizes the redox potential, and improves reproducibly between different electrodes due to the poising of blood. Over the 56-day storage period, the redox potential of the RBCs increased slightly, which can be attributed to change in pH and/or increasing oxidative stress during storage. Cyclic voltammograms acquired after open-circuit potential measurements showed a characteristic peak attributed to the oxidation of VitC. This peak decreased during storage with a time constant of 20.8 days. Likewise, the intercellular concentration of VitC increased with a time constant of 20.2 days as measured using a fluorescence assay. Collectively, these results demonstrate the usefulness of electrochemical measurements in the study of stored blood products.
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Affiliation(s)
- Rezaul Karim Khan
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
| | - Shanmuka P. Gadiraju
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
| | - Megh Kumar
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
| | - Grace A. Hatmaker
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Bernard J. Fisher
- Department of Internal Medicine, Virginia Commonwealth University, Richmond, Virginia 23298, United States
| | - Ramesh Natarajan
- Clinical Investigation Department and Department of Emergency Medicine, Combat Trauma Research Group, Naval Medical Center Portsmouth, Portsmouth, Virginia 23708-2197, United States
| | - Joseph E. Reiner
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Maryanne M. Collinson
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
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19
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diCenzo GC, Debiec K, Krzysztoforski J, Uhrynowski W, Mengoni A, Fagorzi C, Gorecki A, Dziewit L, Bajda T, Rzepa G, Drewniak L. Genomic and Biotechnological Characterization of the Heavy-Metal Resistant, Arsenic-Oxidizing Bacterium Ensifer sp. M14. Genes (Basel) 2018; 9:E379. [PMID: 30060533 PMCID: PMC6115938 DOI: 10.3390/genes9080379] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 07/22/2018] [Accepted: 07/25/2018] [Indexed: 12/23/2022] Open
Abstract
Ensifer (Sinorhizobium) sp. M14 is an efficient arsenic-oxidizing bacterium (AOB) that displays high resistance to numerous metals and various stressors. Here, we report the draft genome sequence and genome-guided characterization of Ensifer sp. M14, and we describe a pilot-scale installation applying the M14 strain for remediation of arsenic-contaminated waters. The M14 genome contains 6874 protein coding sequences, including hundreds not found in related strains. Nearly all unique genes that are associated with metal resistance and arsenic oxidation are localized within the pSinA and pSinB megaplasmids. Comparative genomics revealed that multiple copies of high-affinity phosphate transport systems are common in AOBs, possibly as an As-resistance mechanism. Genome and antibiotic sensitivity analyses further suggested that the use of Ensifer sp. M14 in biotechnology does not pose serious biosafety risks. Therefore, a novel two-stage installation for remediation of arsenic-contaminated waters was developed. It consists of a microbiological module, where M14 oxidizes As(III) to As(V) ion, followed by an adsorption module for As(V) removal using granulated bog iron ores. During a 40-day pilot-scale test in an abandoned gold mine in Zloty Stok (Poland), water leaving the microbiological module generally contained trace amounts of As(III), and dramatic decreases in total arsenic concentrations were observed after passage through the adsorption module. These results demonstrate the usefulness of Ensifer sp. M14 in arsenic removal performed in environmental settings.
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Affiliation(s)
- George C diCenzo
- Laboratory of Microbial Genetics, Department of Biology, University of Florence, via Madonna del Piano 6, 50019 Sesto Fiorentino, Italy.
| | - Klaudia Debiec
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
| | - Jan Krzysztoforski
- Faculty of Chemical and Process Engineering, Warsaw University of Technology, Warynskiego 1, 00-645 Warsaw, Poland.
| | - Witold Uhrynowski
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
| | - Alessio Mengoni
- Laboratory of Microbial Genetics, Department of Biology, University of Florence, via Madonna del Piano 6, 50019 Sesto Fiorentino, Italy.
| | - Camilla Fagorzi
- Laboratory of Microbial Genetics, Department of Biology, University of Florence, via Madonna del Piano 6, 50019 Sesto Fiorentino, Italy.
| | - Adrian Gorecki
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
| | - Lukasz Dziewit
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
| | - Tomasz Bajda
- Department of Mineralogy, Petrography and Geochemistry, Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland.
| | - Grzegorz Rzepa
- Department of Mineralogy, Petrography and Geochemistry, Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland.
| | - Lukasz Drewniak
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
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20
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Lange J, Münch E, Müller J, Busche T, Kalinowski J, Takors R, Blombach B. Deciphering the Adaptation of Corynebacterium glutamicum in Transition from Aerobiosis via Microaerobiosis to Anaerobiosis. Genes (Basel) 2018; 9:E297. [PMID: 29899275 PMCID: PMC6027265 DOI: 10.3390/genes9060297] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 05/31/2018] [Accepted: 06/07/2018] [Indexed: 01/02/2023] Open
Abstract
Zero-growth processes are a promising strategy for the production of reduced molecules and depict a steady transition from aerobic to anaerobic conditions. To investigate the adaptation of Corynebacterium glutamicum to altering oxygen availabilities, we conceived a triple-phase fermentation process that describes a gradual reduction of dissolved oxygen with a shift from aerobiosis via microaerobiosis to anaerobiosis. The distinct process phases were clearly bordered by the bacteria’s physiologic response such as reduced growth rate, biomass substrate yield and altered yield of fermentation products. During the process, sequential samples were drawn at six points and analyzed via RNA-sequencing, for metabolite concentrations and for enzyme activities. We found transcriptional alterations of almost 50% (1421 genes) of the entire protein coding genes and observed an upregulation of fermentative pathways, a rearrangement of respiration, and mitigation of the basic cellular mechanisms such as transcription, translation and replication as a transient response related to the installed oxygen dependent process phases. To investigate the regulatory regime, 18 transcriptionally altered (putative) transcriptional regulators were deleted, but none of the deletion strains showed noticeable growth kinetics under an oxygen restricted environment. However, the described transcriptional adaptation of C. glutamicum resolved to varying oxygen availabilities provides a useful basis for future process and strain engineering.
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Affiliation(s)
- Julian Lange
- Institute of Biochemical Engineering, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany.
| | - Eugenia Münch
- Institute of Biochemical Engineering, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany.
| | - Jan Müller
- Institute of Biochemical Engineering, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany.
| | - Tobias Busche
- Center for Biotechnology, Bielefeld University, Universitätsstraße 27, 33615 Bielefeld, Germany.
- Institute for Biology-Microbiology, Freie Universität Berlin, Königin-Luise-Str. 12-16, 14195 Berlin, Germany.
| | - Jörn Kalinowski
- Center for Biotechnology, Bielefeld University, Universitätsstraße 27, 33615 Bielefeld, Germany.
| | - Ralf Takors
- Institute of Biochemical Engineering, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany.
| | - Bastian Blombach
- Institute of Biochemical Engineering, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany.
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21
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Zhang C, Brown PJB, Hu Z. Thermodynamic properties of an emerging chemical disinfectant, peracetic acid. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 621:948-959. [PMID: 29191692 DOI: 10.1016/j.scitotenv.2017.10.195] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 10/17/2017] [Accepted: 10/19/2017] [Indexed: 05/22/2023]
Abstract
Peracetic acid (PAA or CH3COOOH) is an emerging disinfectant with a low potential to form carcinogenic disinfection by-products (DBPs). Basic thermodynamic properties of PAA are, however, absent or inconsistently reported in the literature. This review aimed to summarize important thermodynamic properties of PAA, including standard Gibbs energy of formation and oxidation-reduction (redox) potential. The standard Gibbs energies of formation of CH3COOOH(aq), CH3COOOH(g), CH3COOOH(l), and CH3COOO(aq)- are -299.41kJ·mol-1, -283.02kJ·mol-1, -276.10kJ·mol-1, and -252.60kJ·mol-1, respectively. The standard redox potentials of PAA are 1.748V and 1.005V vs. standard hydrogen electrode (SHE) at pH 0 and pH 14, respectively. Under biochemical standard state conditions (pH 7, 25°C, 101,325Pa), PAA has a redox potential of 1.385V vs. SHE, higher than many disinfectants. Finally, the environmental implications of the thermodynamic properties of PAA were systematically discussed. Those properties can be used to predict the physicochemical and biological behavior of aquatic systems exposed to PAA.
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Affiliation(s)
- Chiqian Zhang
- Department of Civil & Environmental Engineering, University of Missouri, Columbia, MO 65211, United States
| | - Pamela J B Brown
- Division of Biological Sciences, University of Missouri, Columbia, MO 65211, United States
| | - Zhiqiang Hu
- Department of Civil & Environmental Engineering, University of Missouri, Columbia, MO 65211, United States.
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22
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Wagutu AW, Machunda R, Jande YAC. Crustacean derived calcium phosphate systems: Application in defluoridation of drinking water in East African rift valley. JOURNAL OF HAZARDOUS MATERIALS 2018; 347:95-105. [PMID: 29294411 DOI: 10.1016/j.jhazmat.2017.12.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 11/23/2017] [Accepted: 12/18/2017] [Indexed: 06/07/2023]
Abstract
Calcium phosphate adsorbents, derived from prawns and crabs shell biomass wastes have been developed using wet chemistry and low temperature treatment. The adsorbents were characterized by X-ray diffractometry and Fourier transform infrared spectroscopy. Batch adsorption test were carried out to investigate their effectiveness in adsorption of fluoride from ground and surface waters. Adsorption capacities were compared with bone char and synthetic hydroxyapatite (CCHA). Results indicate that prawns derived adsorbent (PHA) formed hexagonal structure with phases identifiable with hydroxyapatite while crabs based adsorbent (CHA) formed predominantly monoclinic structure with crystalline phase characteristic of brushite. Vibrational analysis and kinetic studies predicted defluoridation occurred mainly by ion exchange and ion adsorption mechanisms. Defluoridation capacity of the adsorbents was found to be superior compared to bone char and CCHA. CHA was the most effective with efficiencies above 92% and highest capacity of 13.6 mg/g in field water with fluoride concentration of 5-70 mg/L. PHA had highest capacity of 8.5 mg/g which was still better than 2.6 mg/g recorded by CCHA and bone char. Adsorption was best described by pseudo 2nd order kinetics. The findings indicate that crustacean derived calcium phosphate systems have better potential for defluoridation than traditional bone char and synthetic systems.
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Affiliation(s)
- Agatha W Wagutu
- Department of Materials, Energy Science and Engineering, Nelson Mandela African Institution of Science and Technology, P.O.BOX 447, Arusha, Tanzania.
| | - Revocatus Machunda
- Department of Water, Environmental Science and Engineering, Nelson Mandela African Institution of Science and Technology, P.O.BOX 447, Arusha, Tanzania
| | - Yusufu Abeid Chande Jande
- Department of Materials, Energy Science and Engineering, Nelson Mandela African Institution of Science and Technology, P.O.BOX 447, Arusha, Tanzania
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23
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Lange J, Takors R, Blombach B. Zero-growth bioprocesses: A challenge for microbial production strains and bioprocess engineering. Eng Life Sci 2016; 17:27-35. [PMID: 32624726 DOI: 10.1002/elsc.201600108] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 08/18/2016] [Accepted: 09/19/2016] [Indexed: 12/20/2022] Open
Abstract
Microbial fermentation of renewable feedstocks is an established technology in industrial biotechnology. Besides strict aerobic or anaerobic modes of operation, novel innovative and industrially applicable fermentation processes were developed connecting the advantages of aerobic and anaerobic conditions in a combined production approach. As a consequence, rapid aerobic biomass formation to high cell densities and subsequent anaerobic high-yield and zero-growth production is realized. Following this strategy, bioprocesses operating with substantial overall yield and productivity can be obtained. Here, we summarize the current knowledge and achievements in such microbial zero-growth production processes and pinpoint to challenges due to the complex adaptation of the cellular metabolism during the cell's passage from aerobiosis to anaerobiosis.
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Affiliation(s)
- Julian Lange
- Institute of Biochemical Engineering University of Stuttgart Stuttgart Germany
| | - Ralf Takors
- Institute of Biochemical Engineering University of Stuttgart Stuttgart Germany
| | - Bastian Blombach
- Institute of Biochemical Engineering University of Stuttgart Stuttgart Germany
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24
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Freeman CJ, Farghaly AA, Choudhary H, Chavis AE, Brady KT, Reiner JE, Collinson MM. Microdroplet-Based Potentiometric Redox Measurements on Gold Nanoporous Electrodes. Anal Chem 2016; 88:3768-74. [DOI: 10.1021/acs.analchem.5b04668] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Christopher J. Freeman
- Department
of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
| | - Ahmed A. Farghaly
- Department
of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
| | - Hajira Choudhary
- Department
of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
| | - Amy E. Chavis
- Department
of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Kyle T. Brady
- Department
of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Joseph E. Reiner
- Department
of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Maryanne M. Collinson
- Department
of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
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25
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Kim MJ, Hung YC. Effect of Alkaline Electrolyzed Water as an Inhibitor of Enzymatic Browning in Red Delicious Apples. J Food Biochem 2014. [DOI: 10.1111/jfbc.12086] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Mi Jeong Kim
- Department of Food Science and Technology; University of Georgia; Griffin GA 30223
| | - Yen-Con Hung
- Department of Food Science and Technology; University of Georgia; Griffin GA 30223
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26
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Veres Z, Ditrói J, Tóth G, Mester T, Lakatos G. The efficiency of municipal wastewater treatment with the reconstructed activated sludge method. J WATER CHEM TECHNO+ 2014. [DOI: 10.3103/s1063455x14030072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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27
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Mohiuddin KM, Otomo K, Ogawa Y, Shikazono N. Seasonal and spatial distribution of trace elements in the water and sediments of the Tsurumi river in Japan. ENVIRONMENTAL MONITORING AND ASSESSMENT 2012; 184:265-279. [PMID: 21404013 DOI: 10.1007/s10661-011-1966-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Accepted: 02/23/2011] [Indexed: 05/30/2023]
Abstract
The Tsurumi, a class-one Japanese river, has a significant metal loading originating from urban environment. Water and sediment samples were collected from 20 sites in winter and summer, 2009 and were analyzed to determine and compare the extent of different trace element enrichment. A widely used five-step sequential extraction procedure was also employed for the fractionation of the trace elements. Concentrations of zinc, copper, lead, chromium, and cadmium were three to four times higher than that of reference values and downstream sediments are much more polluted than the upstream sites. Geochemical partitioning results suggest that the potential trace metal mobility in aquatic environment was in the order of: cadmium > zinc > lead > copper > cobalt > chromium > molybdenum > nickel. About 80.2% zinc, 77.9% molybdenum, 75.3% cobalt, 63.7% lead, 60.9% copper, 55.1% chromium, and 39.8% nickel in the sediment were contributed anthropogenically. According to intensity of pollution, Tsurumi river sediments are moderately to heavily contaminated by zinc, lead, and cobalt. Enrichment factor values demonstrated that zinc, lead, and molybdenum have minor enrichment in both the season. The pollution load index (PLI) has been used to access the pollution load of different sampling sites. The area load index and average PLI values of the river were 7.77 and 4.93 in winter and 7.72 and 4.89 in summer, respectively. If the magnitude of pollution with trace metal in the river system increases continuously, it may have a severe impact on the river's aquatic ecology.
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Affiliation(s)
- K M Mohiuddin
- Laboratory of Geochemistry, School of Science for Open and Environmental Systems, Graduate School of Science and Technology, Keio University, Yokohama, 223-8522, Japan.
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