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Fomina M, Sizova E, Nechitailo К. Antibacterial activity of CuO-Ag Janus like nanoparticles against recombinant strain Escherichia coli. Arch Microbiol 2023; 205:205. [PMID: 37160508 DOI: 10.1007/s00203-023-03546-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/23/2023] [Accepted: 04/09/2023] [Indexed: 05/11/2023]
Abstract
The toxic action of CuO-Ag Janus particles and a bicomponent mixture of CuO and Ag particles have been studied against a recombinant strain Escherichia coli K12 TG1 with cloned luxCDABE genes of marine bacteria Photobacterium leiognathi 54D10. An original method was used for the preparation CuO-Ag Janus like nanoparticles by simultaneous electrical explosion of twisted Cu and Ag wires in a mixture of argon and oxygen gases. The bioluminescence inhibition on recombinant strain E. coli shows that CuO-Ag Janus NPs were effective. The concentration by 50% (EC50) for CuO-Ag Janus NPs was 0.03 ± 0.001 mg/ml (p < 0.05). The bioactivity of the bicomponent mixture of CuO and Ag NPs (EC50) was 0.25 ± 0.002 mg/ml (p < 0.05). The effective concentration of CuO-Ag Janus NPs against E. coli was comparatively lower than those of bicomponent mixture CuO and Ag against which explains the higher activity of CuO-Ag Janus NPs. The toxicity values of CuO and Ag as monocomponent nanoparticles were 2-32 times lower compared with the bicomponent nanoparticles. A dose-dependent inhibition of bacterial luminescence developed over time was noted. The result of contact E. coli with CuO-Ag Janus particles was 100% suppression of bacterial luminescence from the first minutes of contact occured starting with a content of 2.0 mg/ml and within the next 180 min. The effect of bioactivity prolonged in the final concentration of nanopowder (EC100 = 0.0625 ± 0.002 mg/ml) (p < 0.05). CuO-Ag Janus particles exhibited more pronounced antibacterial activity compared to CuO, Ag nanoparticles and their mechanical mixture.
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Affiliation(s)
- Marina Fomina
- Department of Microbiology, Virology, Immunology, OrSMU Orenburg State Medical University, Orenburg, Russian Federation, Sovetskaya st., 6, 460014.
| | - Elena Sizova
- Department of nanotechnologies in agriculture, FSSI Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, Orenburg, Russian Federation, January 9 st., 29, 460000
| | - Кseniya Nechitailo
- Department of nanotechnologies in agriculture, FSSI Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, Orenburg, Russian Federation, January 9 st., 29, 460000
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2
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Dikshit R, Gupta N, Dey A, Viswanathan K, Kumar A. Microbial induced calcite precipitation can consolidate martian and lunar regolith simulants. PLoS One 2022; 17:e0266415. [PMID: 35421143 PMCID: PMC9009621 DOI: 10.1371/journal.pone.0266415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 03/20/2022] [Indexed: 12/02/2022] Open
Abstract
We demonstrate that Microbial Induced Calcite Precipitation (MICP) can be utilized for creation of consolidates of Martian Simulant Soil (MSS) and Lunar Simulant Soil (LSS) in the form of a 'brick'. A urease producer bacterium, Sporosarcina pasteurii, was used to induce the MICP process for the both simulant soils. An admixture of guar gum as an organic polymer and NiCl2, as bio- catalyst to enhance urease activity, was introduced to increase the compressive strength of the biologically grown bricks. A casting method was utilized for a slurry consisting of the appropriate simulant soil and microbe; the slurry over a few days consolidated in the form of a 'brick' of the desired shape. In case of MSS, maximum strength of 3.3 MPa was obtained with 10mM NiCl2 and 1% guar gum supplementation whereas in case of LSS maximum strength of 5.65 Mpa was obtained with 1% guar gum supplementation and 10mM NiCl2. MICP mediated consolidation of the simulant soil was confirmed with field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and thermogravimetry (TG). Our work demonstrates a biological approach with an explicit casting method towards manufacturing of consolidated structures using extra-terrestrial regolith simulant; this is a promising route for in situ development of structural elements on the extra-terrestrial habitats.
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Affiliation(s)
- Rashmi Dikshit
- Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India
| | - Nitin Gupta
- Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India
| | - Arjun Dey
- Thermal Systems Group, U. R. Rao Satellite Centre (Formerly ISRO Satellite Centre), Bangalore, India
| | - Koushik Viswanathan
- Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India
| | - Aloke Kumar
- Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India
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Casar CP, Momper LM, Kruger BR, Osburn MR. Iron-Fueled Life in the Continental Subsurface: Deep Mine Microbial Observatory, South Dakota, USA. Appl Environ Microbiol 2021; 87:e0083221. [PMID: 34378953 PMCID: PMC8478452 DOI: 10.1128/aem.00832-21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 07/29/2021] [Indexed: 11/20/2022] Open
Abstract
Iron-bearing minerals are key components of the Earth's crust and potentially critical energy sources for subsurface microbial life. The Deep Mine Microbial Observatory (DeMMO) is situated in a range of iron-rich lithologies, and fracture fluids here reach concentrations as high as 8.84 mg/liter. Iron cycling is likely an important process, given the high concentrations of iron in fracture fluids and detection of putative iron-cycling taxa via marker gene surveys. However, a previous metagenomic survey detected no iron cycling potential at two DeMMO localities. Here, we revisited the potential for iron cycling at DeMMO using a new metagenomic data set including all DeMMO sites and FeGenie, a new annotation pipeline that is optimized for the detection of iron cycling genes. We annotated functional genes from whole metagenomic assemblies and metagenome-assembled genomes and characterized putative iron cycling pathways and taxa in the context of local geochemical conditions and available metabolic energy estimated from thermodynamic models. We reannotated previous metagenomic data, revealing iron cycling potential that was previously missed. Across both metagenomic data sets, we found that not only is there genetic potential for iron cycling at DeMMO, but also, iron is likely an important source of energy across the system. In response to the dramatic differences we observed between annotation approaches, we recommend the use of optimized pipelines where the detection of iron cycling genes is a major goal. IMPORTANCE We investigated iron cycling potential among microbial communities inhabiting iron-rich fracture fluids to a depth of 1.5 km in the continental crust. A previous study found no iron cycling potential in the communities despite the iron-rich nature of the system. A new tool for detecting iron cycling genes was recently published, which we used on a new data set. We combined this with a number of other approaches to get a holistic view of metabolic strategies across the communities, revealing iron cycling to be an important process here. In addition, we used the tool on the data from the previous study, revealing previously missed iron cycling potential. Iron is common in continental crust; thus, our findings are likely not unique to our study site. Our new view of important metabolic strategies underscores the importance of choosing optimized tools for detecting the potential for metabolisms like iron cycling that may otherwise be missed.
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Affiliation(s)
- C. P. Casar
- Department of Earth and Planetary Sciences, Northwestern University, Evanston, Illinois, USA
| | - L. M. Momper
- Earth and Environmental Sciences Practice, Exponent, Inc., Pasadena, California, USA
| | - B. R. Kruger
- Division of Hydrologic Sciences, Desert Research Institute, Las Vegas, Nevada, USA
| | - M. R. Osburn
- Department of Earth and Planetary Sciences, Northwestern University, Evanston, Illinois, USA
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Aseev D, Batoeva A, Sizykh M, Olennikov D, Matafonova G. Degradation of Bisphenol A in an Aqueous Solution by a Photo-Fenton-Like Process Using a UV KrCl Excilamp. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:1152. [PMID: 33525552 PMCID: PMC7908459 DOI: 10.3390/ijerph18031152] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/23/2021] [Accepted: 01/25/2021] [Indexed: 12/29/2022]
Abstract
Bisphenol A (BPA), a precursor to important plastics, is regarded as a common aquatic micropollutant with endocrine-disrupting activity. In the present study, we explored the capability of a UV KrCl excilamp (222 nm) to degrade BPA by a photo-Fenton-like process using persulfate under flow-through conditions. The first-order rate constants of degradation were obtained and the mineralization of dissolved organic carbon (DOC) was estimated. The results showed complete BPA degradation and high DOC mineralization (70-97%). A comparative analysis of degradation rates and DOC removal in the examined systems (UV, Fe2+/S2O82-, UV/S2O82- and UV/Fe2+/S2O82-) revealed a significant synergistic effect in the photo-Fenton-like system (UV/Fe2+/S2O82-) without the accumulation of toxic intermediates. This indicated that the BPA was oxidized via the conjugated radical chain mechanism, which was based on the photo-induced and catalytic processes involving HO• and SO4-• radicals. The primary intermediates of BPA degradation in the UV/Fe2+/S2O82- system were identified by HPLC/MS and the oxidation pathway was proposed. The high performance of the photo-Fenton-like process employing a quasi-monochromatic UV radiation of a KrCl excilamp offers promising potential for an efficient removal of such micropollutants from aqueous media.
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Affiliation(s)
- Denis Aseev
- Baikal Institute of Nature Management of Siberian Branch of Russian Academy of Sciences, 6, Sakhyanovoy St., 670047 Ulan-Ude, Russia; (D.A.); (A.B.); (M.S.)
| | - Agniya Batoeva
- Baikal Institute of Nature Management of Siberian Branch of Russian Academy of Sciences, 6, Sakhyanovoy St., 670047 Ulan-Ude, Russia; (D.A.); (A.B.); (M.S.)
| | - Marina Sizykh
- Baikal Institute of Nature Management of Siberian Branch of Russian Academy of Sciences, 6, Sakhyanovoy St., 670047 Ulan-Ude, Russia; (D.A.); (A.B.); (M.S.)
| | - Daniil Olennikov
- Institute of General and Experimental Biology of Siberian Branch of Russian Academy of Sciences, 6, Sakhyanovoy St., 670047 Ulan-Ude, Russia;
| | - Galina Matafonova
- Baikal Institute of Nature Management of Siberian Branch of Russian Academy of Sciences, 6, Sakhyanovoy St., 670047 Ulan-Ude, Russia; (D.A.); (A.B.); (M.S.)
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Koba-Ucun O, Ölmez Hanci T, Arslan-Alaton I, Arefi-Oskoui S, Khataee A, Kobya M, Orooji Y. Toxicity of Zn-Fe Layered Double Hydroxide to Different Organisms in the Aquatic Environment. Molecules 2021; 26:E395. [PMID: 33451084 PMCID: PMC7828569 DOI: 10.3390/molecules26020395] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 01/02/2021] [Accepted: 01/06/2021] [Indexed: 11/16/2022] Open
Abstract
The application of layered double hydroxide (LDH) nanomaterials as catalysts has attracted great interest due to their unique structural features. It also triggered the need to study their fate and behavior in the aquatic environment. In the present study, Zn-Fe nanolayered double hydroxides (Zn-Fe LDHs) were synthesized using a co-precipitation method and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and nitrogen adsorption-desorption analyses. The toxicity of the home-made Zn-Fe LDHs catalyst was examined by employing a variety of aquatic organisms from different trophic levels, namely the marine photobacterium Vibrio fischeri, the freshwater microalga Pseudokirchneriella subcapitata, the freshwater crustacean Daphnia magna, and the duckweed Spirodela polyrhiza. From the experimental results, it was evident that the acute toxicity of the catalyst depended on the exposure time and type of selected test organism. Zn-Fe LDHs toxicity was also affected by its physical state in suspension, chemical composition, as well as interaction with the bioassay test medium.
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Affiliation(s)
- Olga Koba-Ucun
- Department of Environmental Engineering, School of Civil Engineering, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey; (O.K.-U.); (T.Ö.H.)
| | - Tuğba Ölmez Hanci
- Department of Environmental Engineering, School of Civil Engineering, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey; (O.K.-U.); (T.Ö.H.)
| | - Idil Arslan-Alaton
- Department of Environmental Engineering, School of Civil Engineering, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey; (O.K.-U.); (T.Ö.H.)
| | - Samira Arefi-Oskoui
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 51666-16471, Iran;
| | - Alireza Khataee
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 51666-16471, Iran;
- Department of Environmental Engineering, Gebze Technical University, 41400 Kocaeli, Gebze, Turkey;
| | - Mehmet Kobya
- Department of Environmental Engineering, Gebze Technical University, 41400 Kocaeli, Gebze, Turkey;
- Department of Environmental Engineering, Kyrgyz-Turkish Manas University, Bishkek 720038, Kyrgyzstan
| | - Yasin Orooji
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China;
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Kurniawan SB, Abdullah SRS, Imron MF, Said NSM, Ismail N‘I, Hasan HA, Othman AR, Purwanti IF. Challenges and Opportunities of Biocoagulant/Bioflocculant Application for Drinking Water and Wastewater Treatment and Its Potential for Sludge Recovery. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E9312. [PMID: 33322826 PMCID: PMC7764310 DOI: 10.3390/ijerph17249312] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 11/30/2020] [Accepted: 12/03/2020] [Indexed: 12/11/2022]
Abstract
The utilization of metal-based conventional coagulants/flocculants to remove suspended solids from drinking water and wastewater is currently leading to new concerns. Alarming issues related to the prolonged effects on human health and further pollution to aquatic environments from the generated nonbiodegradable sludge are becoming trending topics. The utilization of biocoagulants/bioflocculants does not produce chemical residue in the effluent and creates nonharmful, biodegradable sludge. The conventional coagulation-flocculation processes in drinking water and wastewater treatment, including the health and environmental issues related to the utilization of metal-based coagulants/flocculants during the processes, are discussed in this paper. As a counterpoint, the development of biocoagulants/bioflocculants for drinking water and wastewater treatment is intensively reviewed. The characterization, origin, potential sources, and application of this green technology are critically reviewed. This review paper also provides a thorough discussion on the challenges and opportunities regarding the further utilization and application of biocoagulants/bioflocculants in water and wastewater treatment, including the importance of the selection of raw materials, the simplification of extraction processes, the application to different water and wastewater characteristics, the scaling up of this technology to a real industrial scale, and also the potential for sludge recovery by utilizing biocoagulants/bioflocculants in water/wastewater treatment.
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Affiliation(s)
- Setyo Budi Kurniawan
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM Bangi 43600, Selangor, Malaysia; (S.B.K.); (S.R.S.A.); (N.S.M.S.); (N.I.I.); (H.A.H.); (A.R.O.)
| | - Siti Rozaimah Sheikh Abdullah
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM Bangi 43600, Selangor, Malaysia; (S.B.K.); (S.R.S.A.); (N.S.M.S.); (N.I.I.); (H.A.H.); (A.R.O.)
| | - Muhammad Fauzul Imron
- Study Program of Environmental Engineering, Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Kampus C UNAIR, Jalan Mulyorejo, Surabaya 60115, Indonesia
| | - Nor Sakinah Mohd Said
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM Bangi 43600, Selangor, Malaysia; (S.B.K.); (S.R.S.A.); (N.S.M.S.); (N.I.I.); (H.A.H.); (A.R.O.)
| | - Nur ‘Izzati Ismail
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM Bangi 43600, Selangor, Malaysia; (S.B.K.); (S.R.S.A.); (N.S.M.S.); (N.I.I.); (H.A.H.); (A.R.O.)
| | - Hassimi Abu Hasan
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM Bangi 43600, Selangor, Malaysia; (S.B.K.); (S.R.S.A.); (N.S.M.S.); (N.I.I.); (H.A.H.); (A.R.O.)
- Research Centre for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM Bangi 43600, Selangor, Malaysia
| | - Ahmad Razi Othman
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM Bangi 43600, Selangor, Malaysia; (S.B.K.); (S.R.S.A.); (N.S.M.S.); (N.I.I.); (H.A.H.); (A.R.O.)
| | - Ipung Fitri Purwanti
- Department of Environmental Engineering, Faculty of Civil, Planning, and Geo Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya 60111, Indonesia;
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Mazalan NZS, Oyeleye A, Rahman RNZRA, Aris AZ, Salleh AB, Normi YM. Isolation and characterization of an acid and metal tolerant Enterobacter cloacae NZS strain from former mining lake in Selangor, Malaysia. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2020. [DOI: 10.1186/s43088-020-00051-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Metal polluted environments have been found to harbor acid and metal tolerant bacterial communities. Metal oxidizing bacteria in particular are industrially important microorganisms that can be utilized for potential applications in biomining and bioremediation. However, some well-characterized strains are not readily culturable as they are obligate and fastidious chemolithotrophs requiring special techniques for their cultivation. Hence, this study was aimed at isolating, identifying, and characterizing indigenous metal tolerant heterotroph(s) from abandoned mines that can potentially be used for biomining or bioremediation processes in the future.
Results
Seventeen bacteria from former mining lakes were isolated and identified using 16S rRNA. Minimal inhibition concentration (MIC) and growth study of isolated bacteria carried out in Luria-Bertani media containing three different metals ions, zinc (II), copper (II), and iron (II), showed that a particular isolate termed Enterobacter cloacae NZS was found to exhibit better growth and tolerance for copper (up to 90 mM), zinc (up to 200 mM), and iron (up to 170 mM). Growth of the strain was notably well in the presence of iron (II). Compared to all the isolates, only E. cloacae NZS was able to be enumerated at pH lower than 5 while other strains were culturable only at pH 7. Its capability in iron (II) oxidation was preliminary assessed based on the pH, cell count, glucose consumption, and amount of iron oxidized throughout incubation in 9K media. E. cloacae NZS strain was found to be capable of oxidizing iron (II) supplied in 9K media to iron (III).
Conclusion
As preliminary investigation showed that E. cloacae NZS was able to oxidize iron (II) in 9K media at pH2, further optimization on the strain, medium, and culture conditions in future may be able to provide a better insight on this strain to be possibly used as an iron oxidizer for various applications.
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López-Lorente ÁI, Cárdenas S, González-Sánchez ZI. Effect of synthesis, purification and growth determination methods on the antibacterial and antifungal activity of gold nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 103:109805. [PMID: 31349488 DOI: 10.1016/j.msec.2019.109805] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 03/26/2019] [Accepted: 05/26/2019] [Indexed: 01/09/2023]
Abstract
In recent years, both nanotechnology and the use of nanomaterials have been growing in fields as diverse as biomedicine, food or electronics. Particularly metal nanoparticles, such as gold nanoparticles (AuNPs), are being widely studied with different applications, for example as an antimicrobial agent, in hyperthermic therapy or drug transport. Gold nanoparticles can be synthesized by different methods, such as stand out reduction with citrate or greener methods that use greener reducing agents (e.g. stainless steel). In the present work, both the effect of the synthesis method yielding AuNPs with similar size and purification of AuNPs affect the antibacterial and antifungal activities of the AuNPs obtained by citrate reduction and with stainless steel. The growth curves of the gram-negative (E. coli) and gram-positive bacteria (S. aureus) and the yeast C. albicans were constructed and the cell viability was evaluated by (2,3-Bis-(2-Methoxy-4-Nitro-5-Sulfophenyl)-2H-Tetrazolium-5-Carboxanilide (XTT). According to our results, the purification of the AuNPs after their synthesis and the growth determination method affect the antibacterial and antifungal activities while the synthesis method shows no significant differences.
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Affiliation(s)
- Ángela Inmaculada López-Lorente
- Departamento de Química Analítica, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUIQFN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie Anexo, E-14071 Córdoba, Spain
| | - Soledad Cárdenas
- Departamento de Química Analítica, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUIQFN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie Anexo, E-14071 Córdoba, Spain
| | - Zaira Isabel González-Sánchez
- Nanobiology Laboratory, Department of Natural and Exact Sciences, Pontificia Universidad Católica Madre y Maestra, PUCMM, Santiago de los Caballeros, Dominican Republic.
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Mergel O, Schneider S, Tiwari R, Kühn PT, Keskin D, Stuart MCA, Schöttner S, de Kanter M, Noyong M, Caumanns T, Mayer J, Janzen C, Simon U, Gallei M, Wöll D, van Rijn P, Plamper FA. Cargo shuttling by electrochemical switching of core-shell microgels obtained by a facile one-shot polymerization. Chem Sci 2019; 10:1844-1856. [PMID: 30842853 PMCID: PMC6371888 DOI: 10.1039/c8sc04369h] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 12/02/2018] [Indexed: 12/14/2022] Open
Abstract
Controlling and understanding the electrochemical properties of electroactive polymeric colloids is a highly topical but still a rather unexplored field of research. This is especially true when considering more complex particle architectures like stimuli-responsive microgels, which would entail different kinetic constraints for charge transport within one particle. We synthesize and electrochemically address dual stimuli responsive core-shell microgels, where the temperature-responsiveness modulates not only the internal structure, but also the microgel electroactivity both on an internal and on a global scale. In detail, a facile one-step precipitation polymerization results in architecturally advanced poly(N-isopropylacrylamide-co-vinylferrocene) P(NIPAM-co-VFc) microgels with a ferrocene (Fc)-enriched (collapsed/hard) core and a NIPAM-rich shell. While the remaining Fc units in the shell are electrochemically accessible, the electrochemical activity of Fc in the core is limited due to the restricted mobility of redox active sites and therefore restricted electron transfer in the compact core domain. Still, prolonged electrochemical action and/or chemical oxidation enable a reversible adjustment of the internal microgel structure from core-shell microgels with a dense core to completely oxidized microgels with a highly swollen core and a denser corona. The combination of thermo-sensitive and redox-responsive units being part of the network allows for efficient amplification of the redox response on the overall microgel dimension, which is mainly governed by the shell. Further, it allows for an electrochemical switching of polarity (hydrophilicity/hydrophobicity) of the microgel, enabling an electrochemically triggered uptake and release of active guest molecules. Hence, bactericidal drugs can be released to effectively kill bacteria. In addition, good biocompatibility of the microgels in cell tests suggests suitability of the new microgel system for future biomedical applications.
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Affiliation(s)
- Olga Mergel
- Institute of Physical Chemistry , RWTH Aachen University , Landoltweg 2 , 52056 Aachen , Germany
- Department of Biomedical Engineering-FB40 , University of Groningen , University Medical Center Groningen , A. Deusinglaan 1 , Groningen , 9713 AV , The Netherlands
| | - Sabine Schneider
- Institute of Physical Chemistry , RWTH Aachen University , Landoltweg 2 , 52056 Aachen , Germany
| | - Rahul Tiwari
- DWI - Leibniz Institute for Interactive Materials , RWTH Aachen University , Forckenbeckstraße 50 , 52056 Aachen , Germany
| | - Philipp T Kühn
- Department of Biomedical Engineering-FB40 , University of Groningen , University Medical Center Groningen , A. Deusinglaan 1 , Groningen , 9713 AV , The Netherlands
| | - Damla Keskin
- Department of Biomedical Engineering-FB40 , University of Groningen , University Medical Center Groningen , A. Deusinglaan 1 , Groningen , 9713 AV , The Netherlands
| | - Marc C A Stuart
- Groningen Biomolecular Sciences and Biotechnology Institute , Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 7 , 9747 AG Groningen , The Netherlands
| | - Sebastian Schöttner
- Ernst-Berl-Institute for Chemical Engineering and Macromolecular Chemistry , Technische Universität Darmstadt , Alarich-Weiss-Straße 4 , D-64287 Darmstadt , Germany
| | - Martinus de Kanter
- Chair for Laser Technology LLT , RWTH Aachen University , Steinbachstr. 15 , 52074 Aachen , Germany
| | - Michael Noyong
- Institute of Inorganic Chemistry , JARA-SOFT , RWTH Aachen University , Landoltweg 1 , 52056 Aachen , Germany
| | - Tobias Caumanns
- GFE Central Facility for Electron Microscopy , RWTH Aachen University , Ahornstraße 55 , D-52074 Aachen , Germany
| | - Joachim Mayer
- GFE Central Facility for Electron Microscopy , RWTH Aachen University , Ahornstraße 55 , D-52074 Aachen , Germany
| | - Christoph Janzen
- Fraunhofer Institute for Laser Technology (ILT) , Steinbachstr. 15 , 52074 Aachen , Germany
| | - Ulrich Simon
- Institute of Inorganic Chemistry , JARA-SOFT , RWTH Aachen University , Landoltweg 1 , 52056 Aachen , Germany
| | - Markus Gallei
- Ernst-Berl-Institute for Chemical Engineering and Macromolecular Chemistry , Technische Universität Darmstadt , Alarich-Weiss-Straße 4 , D-64287 Darmstadt , Germany
| | - Dominik Wöll
- Institute of Physical Chemistry , RWTH Aachen University , Landoltweg 2 , 52056 Aachen , Germany
| | - Patrick van Rijn
- Department of Biomedical Engineering-FB40 , University of Groningen , University Medical Center Groningen , A. Deusinglaan 1 , Groningen , 9713 AV , The Netherlands
| | - Felix A Plamper
- Institute of Physical Chemistry , RWTH Aachen University , Landoltweg 2 , 52056 Aachen , Germany
- Institute of Physical Chemistry , TU Bergakademie Freiberg , Leipziger Straße 29 , 09599 Freiberg , Germany . ; ; Tel: +49-3731-39-2139
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Akgul D, Abbott T, Eskicioglu C. Assessing iron and aluminum-based coagulants for odour and pathogen reductions in sludge digesters and enhanced digestate dewaterability. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 598:881-888. [PMID: 28458205 DOI: 10.1016/j.scitotenv.2017.04.141] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 02/26/2017] [Accepted: 04/19/2017] [Indexed: 06/07/2023]
Abstract
Anaerobic digestion (AD) is an effective way of recovering energy and nutrients from organic waste. However, several issues including the production of corrosive, highly odorous and toxic volatile sulfur compounds (VSCs) in digester biogas, and long digestion times to achieve sufficient pathogen reductions can limit its wider adoption. In this study, Kemira™ PIX-311 (ferric chloride), PAX XL-6 (aluminum chloride hydroxide sulfate), and PAX XL-19 (polyaluminum chlorohydrate) were added to the digester feeds to evaluate the effects on digester stability, organic removal, VSCs formation in digester headspace, pathogen removal and sludge dewaterability. After preliminary dose trials, two different doses of PIX-311, PAX XL-19, and a 1:1 mixture of PIX-311 and PAX XL-19 were selected. PAX XL-6 was removed from further study as dosing significantly increased VSC levels and the PAX XL-6 dosed digester exhibited signs of instability. During the total operation period of 100days, addition of PIX-311, PAX XL-19, a combination of PIX-311, PAX XL-19 at concentrations of 4000 and 4500mg/kg total solids (TS) to digester feed did not lead to process instability. Biogas yields of all metal added digesters were similar to that of the control (no metal addition) digester. PIX-311 achieved up to a 93% reduction in biogas VSCs, 82% better fecal coliform inactivation and exhibited improved dewaterability over the control digester. The PAX XL-19 dosed digester showed modest reductions in biogas VSC concentrations, pathogen levels and improved dewaterability versus the control. Metal addition can be an effective way to control odours from VSCs, pathogens and to improve dewaterability during AD.
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Affiliation(s)
- Deniz Akgul
- UBC Bioreactor Technology Group, School of Engineering, University of British Columbia, Okanagan Campus, Kelowna, BC, Canada.
| | - Timothy Abbott
- UBC Bioreactor Technology Group, School of Engineering, University of British Columbia, Okanagan Campus, Kelowna, BC, Canada.
| | - Cigdem Eskicioglu
- UBC Bioreactor Technology Group, School of Engineering, University of British Columbia, Okanagan Campus, Kelowna, BC, Canada.
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Kurvet I, Juganson K, Vija H, Sihtmäe M, Blinova I, Syvertsen-Wiig G, Kahru A. Toxicity of Nine (Doped) Rare Earth Metal Oxides and Respective Individual Metals to Aquatic Microorganisms Vibrio fischeri and Tetrahymena thermophila. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E754. [PMID: 28773114 PMCID: PMC5551797 DOI: 10.3390/ma10070754] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 06/13/2017] [Accepted: 06/30/2017] [Indexed: 01/31/2023]
Abstract
Despite the increasing use of rare earth elements (REEs) and oxides (REOs) in various technologies, the information on their ecotoxicological hazard is scarce. Here, the effects of La3+, Ce3+, Pr3+, Nd3+, Gd3+, CeO₂, and eight doped REOs to marine bacteria Vibrio fischeri and freshwater protozoa Tetrahymena thermophila were studied in parallel with REO dopant metals (Co2+, Fe3+, Mn2+, Ni2+, Sr2+). The highest concentrations of REOs tested were 100 mg/L with protozoa in deionized water and 500 mg/L with bacteria in 2% NaCl. Although (i) most REOs produced reactive oxygen species; (ii) all studied soluble REEs were toxic to bacteria (half-effective concentration, EC50 3.5-21 mg metal/L; minimal bactericidal concentration, MBC 6.3-63 mg/L) and to protozoa (EC50 28-42 mg/L); and (iii) also some dopant metals (Ni2+, Fe3+) proved toxic (EC50 ≤ 3 mg/L), no toxicity of REOs to protozoa (EC50 > 100 mg/L) and bacteria (EC50 > 500 mg/L; MBC > 500 mg/L) was observed except for La₂NiO₄ (MBC 25 mg/L). According to kinetics of V. fischeri bioluminescence, the toxicity of REEs was triggered by disturbing cellular membrane integrity. Fortunately, as REEs and REOs are currently produced in moderate amounts and form in the environment insoluble salts and/or oxides, they apparently present no harm to aquatic bacteria and protozoa.
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Affiliation(s)
- Imbi Kurvet
- Laboratory of Environmental Toxicology, National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia.
| | - Katre Juganson
- Laboratory of Environmental Toxicology, National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia.
- School of Science, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia.
| | - Heiki Vija
- Laboratory of Environmental Toxicology, National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia.
| | - Mariliis Sihtmäe
- Laboratory of Environmental Toxicology, National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia.
| | - Irina Blinova
- Laboratory of Environmental Toxicology, National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia.
| | | | - Anne Kahru
- Laboratory of Environmental Toxicology, National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia.
- Estonian Academy of Sciences, Kohtu 6, 10130 Tallinn, Estonia.
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Deryabin DG, Efremova LV, Karimov IF, Manukhov IV, Gnuchikh EY, Miroshnikov SA. Comparative sensitivity of the luminescent Photobacterium phosphoreum, Escherichia coli, and Bacillus subtilis strains to toxic effects of carbon-based nanomaterials and metal nanoparticles. Microbiology (Reading) 2016. [DOI: 10.1134/s0026261716020053] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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13
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Boda SK, Pandit S, Garai A, Pal D, Basu B. Bacterial siderophore mimicking iron complexes as DNA targeting antimicrobials. RSC Adv 2016. [DOI: 10.1039/c6ra02603f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Microbial secretion of siderophores for iron uptake can be employed as an efficient strategy to smuggle in bactericidal agents by conjugation to iron.
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Affiliation(s)
- Sunil Kumar Boda
- Laboratory for Biomaterials – Materials Research Centre
- Indian Institute of Science
- Bangalore – 560012
- India
| | - Subhendu Pandit
- Laboratory for Biomaterials – Materials Research Centre
- Indian Institute of Science
- Bangalore – 560012
- India
| | - Aditya Garai
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bangalore – 560012
- India
| | - Debnath Pal
- Department of Computational and Data Sciences
- Indian Institute of Science
- Bangalore – 560012
- India
| | - Bikramjit Basu
- Laboratory for Biomaterials – Materials Research Centre
- Indian Institute of Science
- Bangalore – 560012
- India
- Centre for Biosystems Science and Engineering
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