Article
Biochemistry & Molecular Biology
Yuxin Gong, Ying Wu, Aman Khan, Peizhi Song, Zhenfei Wang, Hongyuhang Ni, Jing Ji, El-Sayed Salama, Pu Liu, Xiangkai Li
Summary: This study identified a high-efficiency selenite reductase, SerV01, which was introduced into the intestines of broilers to increase selenium content and improve antioxidant capability. The modified probiotics also increased the proportion of beneficial intestinal flora.
Article
Chemistry, Physical
Job T. Tendenedzai, Evans M. N. Chirwa, Hendrik G. Brink
Summary: The study focused on the aerobic batch reduction of different selenite concentrations using Enterococcus spp. The results showed that Enterococcus species have high adaptability for rapid selenium reduction and biosynthesis of elemental selenium. The experimental data highlighted the potential of Enterococcus spp. for their ability to reduce selenite under extreme conditions.
Article
Environmental Sciences
Sangmin Won, Myung-Gyu Ha, Dinh Duc Nguyen, Ho Young Kang
Summary: This study isolated four selenite-reducing bacteria from a river water sample, with strain NDSe-7 showing efficient selenite reduction capability under alkaline and high salinity conditions. These extremophilic microorganisms demonstrate potential for selenium removal and recovery from industrial wastewater.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Arindam Sinharoy, Piet N. L. Lens
Summary: In this study, the reduction of selenite and selenate using waste activated sludge and hydrogen as electron donor was investigated. The results showed that both selenite and selenate could be efficiently removed using H-2 within 8 days. The production of byproducts was minimal and the reduction process was characterized.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Applied
ZhiJian Li, QingQing Wang, FuJuan Dai, HaiFeng Li
Summary: The study found that the Se(IV)-resistant Lactobacillus paralimentarius strain JZ07 has high selenium biotransformation ability, which can produce red elemental selenium nanospheres and play an important role in selenium bioaccumulation. The sulfur content in the cells increases significantly in the presence of Se(IV), resulting in changes in cell morphology.
Article
Microbiology
JinLan Huang, DaiHua Jiang, MingShi Wang, XueJiao Huang
Summary: In this study, a bacterial strain named Proteus mirabilis QZB-2 with high selenite resistance was isolated from lateritic red soil. The strain has the capability to reduce selenite to selenium nanoparticles (SeNPs) at a rapid rate.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Atsuki Shimizu, Ryuta Tobe, Riku Aono, Masao Inoue, Satoru Hagita, Kaito Kiriyama, Yosuke Toyotake, Takuya Ogawa, Tatsuo Kurihara, Kei Goto, N. Tejo Prakash, Hisaaki Mihara
Summary: The study revealed that the thioredoxin system from Pseudomonas stutzeri specifically reduces selenite in the presence of TrxA (PsTrxA), with Cys33 and Cys36 residues being crucial for selenite reduction via the formation of PsTrxA-SeO intermediate. The results also suggest the importance of TrxA in selenoprotein biosynthesis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Zhiyong Yu, Shulin Xu, Yonggang Feng, Chengyong Yang, Qing Yao, Qi Shao, Ya-Fei Li, Xiaoqing Huang
Summary: In this study, active and stable Pd-Se alloy electrocatalysts with controlled phase for alkaline ORR were explored, showing that Pd17Se15 NPs/C exhibit much better ORR performance compared to Pd17Se4 NPs/C, commercial Pd/C, and Pt/C. The enhanced activity is attributed to the stronger oxygenated species adsorption capacity of Pd in Pd17Se15, leading to more charge transfer from the surface to the *OOH intermediate as revealed by DFT analysis.
Article
Chemistry, Multidisciplinary
Mingyu Li, Wenjing Sun, Zhanyang Chen
Summary: Adding biochar to soil can improve the physical-chemical properties, microscopic pore structure, and bacterial habitat, which affects the soil's strength characteristics and the oxidization of methane. The amount of biochar, methane-oxidizing bacteria, aeration time, and carbon content have significant effects on the strength characteristics of the biochar-amended clay. The stress-strain curves of the biochar-clay mixture show a softened state, and the soil's stress-strain curves exhibit strain softening as the methane filling time increases.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Electrical & Electronic
Kaitlin Hellier, Derek A. Stewart, John Read, Roy Sfadia, Shiva Abbaszadeh
Summary: Amorphous selenium alloyed with tellurium (a-Se1-xTex) is investigated for its optical and electrical properties in this study. Hole and electron mobilities, conversion efficiencies, and band gaps are reported for different compositions of a-Se1-xTex devices. These values are reported at high electric field for the first time, showing the recovery of quantum efficiency in Se-Te alloys. The study also expands on the role of defect states in device performance.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Review
Engineering, Environmental
Liang Zhang, Yan-Ying Qiu, Yan Zhou, Guang-Hao Chen, Mark C. M. van Loosdrecht, Feng Jiang
Summary: Biochemical oxidation and reduction processes using elemental sulfur have emerged as cost-effective and attractive alternatives for water and wastewater treatment, offering benefits such as reduced operational costs, avoidance of secondary pollution, and efficient mineralization of organic matter.
Article
Engineering, Environmental
B. Song, Z. Tian, R. D. van der Weijden, C. J. N. Buisman, J. Weijma
Summary: A high-rate process for biological selenate reduction to elemental selenium was developed, showing high selectivity and conversion efficiency, which may serve as the basis for a high-rate technology to remove and recover pure selenium from wastewater or process streams with high selectivity.
Article
Chemistry, Physical
Lin Zhang, Chengjie Lu, Fei Ye, Zeyi Wu, Yanan Wang, Le Jiang, Liang Zhang, Chen Cheng, Zhengming Sun, Linfeng Hu
Summary: Transition metal selenites have shown promising potential in catalysis, with a vacancy-boosting strategy revealing enhanced activity in amorphous structures rich in oxygen/selenium vacancies. The amorphous Ni1Fe1SeO sample exhibited outstanding OER activity, highlighting the importance of vacancy engineering for improved electrocatalysts. XANES, EPR, and DFT analyses provided insights into the catalysis mechanism behind the enhanced OER performance.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Energy & Fuels
Guillermo I. Quijano, Edgardo Valenzuela, Domingo Cantero, Martin Ramirez, Ivonne Figueroa-Gonzalez
Summary: This study demonstrated that anoxic desulfurization process can impact the CH4 and CO2 content of purified biogas. The reduction in CO2 concentration and increase in CH4 concentration in the purified biogas were found to be proportional, with CO2 absorption playing a role in this process. Additionally, the presence of methane-oxidizing bacteria suggests that methane oxidation occurred in the desulfurization system.
Article
Multidisciplinary Sciences
Qian Long, Lan-kun Cui, Sheng-bin He, Jian Sun, Quan-zhi Chen, Hao-dong Bao, Teng-yue Liang, Bao-yue Liang, Lan-yu Cui
Summary: In this study, a selenium-enriched strain of P. motobuensis LY5201 was isolated, which showed high resistance to selenite and could synthesize selenium nanoparticles. The purified SeNPs consisted of selenium and proteins. SeNPs exhibited an inhibitory effect on HepG2 cells and could have potential as an anticancer drug.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Evelyn Krawczyk-Baersch, Andreas C. Scheinost, Andre Rossberg, Katharina Mueller, Frank Bok, Lotta Hallbeck, Jana Lehrich, Katja Schmeide
Summary: The microaerophilic iron(II) oxidizer Gallionella ferruginea forms stalks and has a high sorption capacity towards radionuclides, with the ability to form inner-sphere complexes. The rapid iron precipitation in G. ferruginea-dominated systems makes more ferrihydrite available for immobilization processes of heavy metals and radionuclides in contaminated environments.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Applied
Georgia Cametti, Andreas C. Scheinost, Sergey V. Churakov
Summary: Small-pore zeolites can be tuned by modifying their extraframework cation composition through ion exchange, as demonstrated in this study on Cd-exchanged levyne and erionite intergrowth. The Cd2+ in levyne is nearly ordered, while strong disorder of Cd2+ and H2O is observed in erionite. A new approach incorporating MD simulations and geometry optimization helps discriminate between thermal and static disorder.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Environmental Sciences
Katja Schmeide, Andre Rossberg, Frank Bok, Salim Shams Aldin Azzam, Stephan Weiss, Andreas C. Scheinost
Summary: The interaction between nuclear waste container materials in deep geological repositories and the actinide fission product technetium was studied, revealing a high retention capacity of chukanovite towards Tc-VII, primarily controlled by pH levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Inorganic & Nuclear
Emanuele De Bona, Karin Popa, Olaf Walter, Marco Cologna, Christoph Hennig, Andreas C. Scheinost, Damien Prieur
Summary: This study reveals the importance of microstructure in preventing volumetric expansion of nuclear fuel during oxidation, which has significant implications for the safety of nuclear waste storage.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Augusto F. Oliveira, Agnieszka Kuc, Thomas Heine, Ulrich Abram, Andreas C. Scheinost
Summary: The beta-emitting Tc-99 isotope, a fission product in nuclear reactors, poses challenges in waste management due to its long half-life and mobility. Previous studies suggest linear chain structures, but our research reveals zigzag chains and a slow aging process.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Engineering, Environmental
Agnieszka Poulain, Alejandro Fernandez-Martinez, Jean-Marc Greneche, Damien Prieur, Andreas C. Scheinost, Nicolas Menguy, Sarah Bureau, Valerie Magnin, Nathaniel Findling, Jakub Drnec, Isaac Martens, Marta Mirolo, Laurent Charlet
Summary: This study investigated the sorption and reduction capacity of synthetic nanomagnetite toward Se(VI). The results showed that under specific conditions, Se(IV) and Fe(II) complexes interacted with magnetite, leading to the reduction and immobilization of Se(VI). Trigonal gray Se(0) and sorbed Se(IV) complexes were observed at pH 5. This study is important for understanding the environmental reactivity of magnetite.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Review
Microbiology
Robin A. Dawson, Andrew T. Crombie, Robert S. Jansen, Thomas J. Smith, Tim Nichol, Colin Murrell
Summary: Isoprene, emitted by plants in large quantities each year, interacts with atmospheric compounds and has implications for global warming and local air quality. It has long been known that soil-dwelling bacteria consume a significant amount of isoprene, but the mechanisms underlying this biological sink have been poorly understood. Recent studies have identified bacterial genera that can degrade isoprene through different mechanisms, challenging our understanding of isoprene uptake and the ecology of isoprene-degraders.
ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Environmental Sciences
Miguel A. Ruiz-Fresneda, Maria Fernandez-Cantos, Jaime Gomez-Bolivar, Abdurrahman S. Eswayah, Philip H. E. Gardiner, Maria Pinel-Cabello, Pier L. Solari, Mohamed L. Merroun
Summary: Metal pollution is a global problem caused by the release of toxic elements into the environment. Bioremediation is an efficient and environmentally friendly strategy to reduce the mobility and toxicity of these contaminants, such as selenium. This study demonstrates the ability of Stenotrophomonas bentonitica to transform selenium into crystalline nanorods through enzymatic reduction and volatilization processes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Public, Environmental & Occupational Health
K. L. Capper-Parkin, T. Nichol, T. J. Smith, M. M. Lacey, S. Forbes
Summary: This study evaluated the combinatorial effect of biocides and QSIs on bacterial inhibition and eradication, and found that the combination of PHMB and silver nitrate with cinnamaldehyde displayed synergistic antimicrobial activity, suggesting potential as anti-infective catheter-coating agents.
JOURNAL OF HOSPITAL INFECTION
(2023)
Article
Materials Science, Multidisciplinary
Sudipta Chakraborty, Dipanjan Banerjee, Andreas C. Scheinost, Jean-Marc Greneche, Fabienne Favre, Antoine Gehin, Laurent Charlet
Summary: The reactivity of Fe(II) sorbed on different types of clay towards U(VI) reduction was investigated. U(VI) reduction only occurred on Fe-free synthetic montmorillonite (MONT), and a hydrated uranyl silicate (soddyite)-like phase was formed. The lack of reactivity on Fe-poor natural montmorillonite (Fe-MONT) and Fe-rich natural nontronite (NAu-2) is likely due to inter-valence charge transfer (IVCT) between surface Fe(II) and structural Fe(III). This study highlights the dependence of clay sorbed Fe2+ reactivity on the nature of clay and the oxidation state of sorbed Fe.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Chemistry, Physical
Enrico Bianchetti, Augusto F. Oliveira, Andreas C. Scheinost, Cristiana Di Valentin, Gotthard Seifert
Summary: This study investigates the chemistry of TcVIIO4- and TcIV species at the Fe3O4(001) surface using a hybrid DFT functional (HSE06) method. The results indicate that the interaction between TcVIIO4- and the magnetite surface leads to the formation of reduced TcVI species without any change in the Tc coordination sphere. Additionally, several model structures for the immobilized TcIV final products are explored, showing that TcIV can be incorporated into a subsurface octahedral site or adsorbed on the surface as TcIVO2 center dot xH2O chains.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Georgia Cametti, Diana P. Roos, Damien Prieur, Andreas C. Scheinost, Sergey V. Churakov
Summary: The structural investigation of a Pb-exchanged zeolite revealed an unusual volume increase under heating, which was found to be caused by the formation of Pb-x(OH)(y) clusters.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Environmental
Julio Marin, Marinela Colina, Hilda Ledo, P. H. E. Gardiner
Summary: The potential ecological risk of aquatic sediments in different areas of Lake Maracaibo was evaluated using multiple guidelines. The levels of potentially toxic elements were found to be higher in El Tablazo Bay, the Strait of Maracaibo, and the lake area, with elevated levels of As, Cd, and Pb posing a latent toxicity hazard to native biological communities.
ENVIRONMENTAL ENGINEERING RESEARCH
(2022)
Article
Chemistry, Physical
Joseph Hufton, John Harding, Thomas Smith, Maria E. Romero-Gonzalez
Summary: The bacterial cell envelope, particularly the cell wall, is considered to be the main controlling factor in the biosorption of aqueous uranium(vi) by microorganisms. The study found that uranium biosorption is mediated by phosphate and carboxyl groups associated with proteins and phosphorylated biopolymers of the cell envelope. The importance of bacterial cell wall as the key mediator of uranium biosorption with microorganisms was demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Biotechnology & Applied Microbiology
Salaheldeen Enbaia, Abdurrahman Eswayah, Nicole Hondow, Philip H. E. Gardiner, Thomas J. Smith
Summary: Aerobic methane-oxidizing bacteria, such as Methylococcus capsulatus Bath, can effectively reduce chromium(VI) to chromium(III) and accumulate it within cells, diminishing the bioavailability of chromium and making it less likely to be reoxidized to chromium(VI). This interaction represents a novel pattern and indicates the potential contribution of methanotrophs in methane-driven remediation of chromium-contaminated environments.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2021)