Iron or Iron-Based Bimetallic Nanoparticle-Immobilized Electrospun Polymer Nanofibers for Environmental Remediation Applications

2018 ◽  
pp. 257-282
Author(s):  
Shili Xiao ◽  
Xiangyang Shi
Keyword(s):  
Environmental Remediation ◽  
Polymer Nanofibers ◽  
Bimetallic Nanoparticle ◽  
Iron Based

scholarly journals Catalytic Reduction of Hexavalent Chromium Using Iron/Palladium Bimetallic Nanoparticle-Assembled Filter Paper

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1183 ◽  
Author(s):  
Daniel Shi ◽  
Zhijun Ouyang ◽  
Yili Zhao ◽  
Jie Xiong ◽  
Xiangyang Shi
Keyword(s):  
Hexavalent Chromium ◽  
Filter Paper ◽  
Environmental Remediation ◽  
Bimetallic Nanoparticles ◽  
Catalytic Reduction ◽  
Low Cost ◽  
Bimetallic Nanoparticle ◽  
Amine Groups ◽  
Positively Charged ◽  
Iron Palladium

Iron/palladium bimetallic nanoparticles (Fe/Pd NPs) are important catalytic materials for the field of environmental remediation. In the present study, filter paper was employed as a substrate for the assembly of Fe/Pd NPs and further applied for the catalytic conversion of hexavalent chromium Cr(VI) toward trivalent Cr(III). First, a filter paper with negative charge was assembled with a layer of positively charged polyethylenimine (PEI) through electrostatic interaction; then, the abundant amine groups of PEI were used to complex Fe(III) ions, followed by reduction via sodium borohydride to produce an Fe NP-assembled filter paper. Thereafter, the Fe/Pd NPs were produced by the reduction of PdCl42− through Fe NPs. The prepared filter paper assembled with Fe/Pd NPs with a mean diameter of 10.1 nm was characterized by various techniques. The Fe/Pd NP-assembled filter paper possesses powerful catalytic activity and can be used to transform Cr(VI) to Cr(III). With its low cost, high sustainability, and convenient industrialization potential, the developed approach may be extended to produce other bimetallic NP-immobilized filter paper for different environmental remediation applications.

scholarly journals Engineering of Iron-Based Magnetic Activated Carbon Fabrics for Environmental Remediation

Materials ◽  
2015 ◽  
Vol 8 (7) ◽  
pp. 4593-4607 ◽  
Author(s):  
Hai Haham ◽  
Judith Grinblat ◽  
Moulay-Tahar Sougrati ◽  
Lorenzo Stievano ◽  
Shlomo Margel
Keyword(s):  
Activated Carbon ◽  
Environmental Remediation ◽  
Magnetic Activated Carbon ◽  
Iron Based ◽  
Carbon Fabrics

scholarly journals Carbamazepine Degradation Mediated by Light in the Presence of Humic Substances-Coated Magnetite Nanoparticles

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1379 ◽  
Author(s):  
Francisca Aparicio ◽  
Juan Pablo Escalada ◽  
Eduardo De Gerónimo ◽  
Virginia C. Aparicio ◽  
Fernando S. García Einschlag ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Magnetic Nanoparticles ◽  
Humic Substances ◽  
Hydroxyl Radicals ◽  
Magnetite Nanoparticles ◽  
Environmental Remediation ◽  
Fenton Reaction ◽  
Core Shell ◽  
Heterogeneous Oxidation ◽  
Iron Based

The use of iron-based nanomaterials for environmental remediation processes has recently received considerable attention. Here, we employed core-shell magnetite-humic acids nanoparticles as a heterogeneous photosensitizer and iron source in photo-Fenton reaction for the degradation of the psychiatric drug carbamazepine (CBZ). CBZ showed low photodegradation rates in the presence of the magnetic nanoparticles, whereas the addition of hydrogen peroxide at pH = 3 to the system drastically increased the abatement of the contaminant. The measured Fe2+ and Fe3+ profiles point to the generation of Fe3+ at the surface of the nanoparticles, indicating a heterogeneous oxidation of the contaminant mediated by hydroxyl radicals. Products with a higher transformation degree were observed in the photo-Fenton procedure and support the attack of the HO• radical on the CBZ molecule. Promising results encourage the use of the nanoparticles as efficient iron sources with enhanced magnet-sensitive properties, suitable for applications in photo-Fenton treatments for the purification of wastewater.

A peek in the micro-sized world: a review of design principles, engineering tools, and applications of engineered microbial community

2020 ◽  
Vol 48 (2) ◽  
pp. 399-409
Author(s):  
Baizhen Gao ◽  
Rushant Sabnis ◽  
Tommaso Costantini ◽  
Robert Jinkerson ◽  
Qing Sun
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Environmental Remediation ◽  
Real Life ◽  
Design Principles ◽  
Microbial Interactions ◽  
Potential Applications ◽  
New Gene ◽  
Global Biogeochemical Cycles ◽  
Synthetic Microbial Communities

Microbial communities drive diverse processes that impact nearly everything on this planet, from global biogeochemical cycles to human health. Harnessing the power of these microorganisms could provide solutions to many of the challenges that face society. However, naturally occurring microbial communities are not optimized for anthropogenic use. An emerging area of research is focusing on engineering synthetic microbial communities to carry out predefined functions. Microbial community engineers are applying design principles like top-down and bottom-up approaches to create synthetic microbial communities having a myriad of real-life applications in health care, disease prevention, and environmental remediation. Multiple genetic engineering tools and delivery approaches can be used to ‘knock-in' new gene functions into microbial communities. A systematic study of the microbial interactions, community assembling principles, and engineering tools are necessary for us to understand the microbial community and to better utilize them. Continued analysis and effort are required to further the current and potential applications of synthetic microbial communities.

Magnetic Circular X-Ray Dichroism at the Ce LII,IIIEdges in Ferromagnetic Iron Based Intei metallic

1997 ◽  
Vol 7 (C2) ◽  
pp. C2-439-C2-440
Author(s):  
O. Isnard ◽  
S. Miraglia ◽  
Ch. Giorgetti ◽  
F. Baudelet ◽  
E. Dartyge ◽  
...  
Keyword(s):  
X Ray ◽  
Iron Based ◽  
Ferromagnetic Iron
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