Iron modification in the mold using foam-ceramic filters

Refractories ◽  
1991 ◽  
Vol 32 (3-4) ◽  
pp. 132-133
Author(s):  
L. G. Ivanchenkova
Keyword(s):  
Ceramic Filters ◽  
Foam Ceramic ◽  
Iron Modification

Theory of design of foam ceramic filters for cleaning molten metals

1999 ◽  
Vol 40 (11-12) ◽  
pp. 537-542 ◽  
Author(s):  
A. N. Leonov ◽  
M. M. Dechko
Keyword(s):  
Molten Metals ◽  
Ceramic Filters ◽  
Foam Ceramic

Antibacterial silver-diatomite nanocomposite ceramic with low silver release

2019 ◽  
Vol 20 (2) ◽  
pp. 633-643
Author(s):  
Xiaopeng Qi ◽  
Junwei Chen ◽  
Qian Li ◽  
Hui Yang ◽  
Honghui Jiang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Water Treatment ◽  
Photoelectron Spectroscopy ◽  
Bactericidal Effect ◽  
Ceramic Filter ◽  
Ceramic Filters ◽  
X Ray ◽  
E Coli ◽  
Point Of Use ◽  
Silver Release

Abstract There is an urgent need for an effective and long-lasting ceramic filter for point-of-use water treatment. In this study, silver-diatomite nanocomposite ceramic filters were developed by an easy and effective method. The ceramic filters have a three-dimensional interconnected pore structure and porosity of 50.85%. Characterizations of the silver-diatomite nanocomposite ceramic filters were performed using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Silver nanoparticles were confirmed to be formed in situ in the ceramic filter. The highest silver concentration in water was 0.24 μg/L and 2.1 μg/L in short- and long-term experiments, indicating very low silver-release properties of silver-diatomite nanocomposite ceramic filter. The nanocomposite ceramics show strong bactericidal activity. When contact time with Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) of 105 colony forming units (CFU)/mL exceeded 3 h, the bactericidal rates of the four different silver content ceramics against E. coli and S. aureus were all 100%. Strong bactericidal effect against E. coli with initial concentration of 109 CFU/mL were also observed in ceramic newly obtained and ceramic immersed in water for 270 days, demonstrating its high stability. The silver-diatomite nanocomposite ceramic filters could be a promising candidate for point-of-use water treatment.

scholarly journals The Catalytic Oxidation of Formaldehyde by FeOx-MnO2-CeO2 Catalyst: Effect of Iron Modification

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 555
Author(s):  
Yaxin Dong ◽  
Chenguang Su ◽  
Kai Liu ◽  
Haomeng Wang ◽  
Zheng Zheng ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Oxygen Vacancies ◽  
Catalytic Performance ◽  
Active Oxygen ◽  
Molar Ratio ◽  
N2 Adsorption ◽  
Structure Activity ◽  
Iron Modification ◽  
Surface Active ◽  
Catalyst Effect

A series of FeOx-MnO2-CeO2 catalysts were synthesized by the surfactant-templated coprecipitation method and applied for HCHO removal. The influence of Fe/Mn/Ce molar ratio on the catalytic performance was investigated, and the FeOx-MnO2-CeO2 catalyst exhibited excellent catalytic activity, with complete HCHO conversion at low temperatures (40 °C) when the molar ratio of Fe/Mn/Ce was 2/5/5. The catalysts were characterized by N2 adsorption and desorption, XRD, H2-TPR, O2-TPD and XPS techniques to illustrate their structure–activity relationships. The result revealed that the introduction of FeOx into MnO2-CeO2 formed a strong interaction between FeOx-MnO2-CeO2, which facilitated the improved dispersion of MnO2-CeO2, subsequently increasing the surface area and aiding pore development. This promotion effect of Fe enhanced the reducibility and produced abundant surface-active oxygen. In addition, a great number of Oα is beneficial to the intermediate decomposition, whereas the existence of Ce3+ favors the formation of oxygen vacancies on the surface of the catalyst, all of which contributed to HCHO oxidation at low temperatures.

scholarly journals Antimicrobial Ceramic Filters for Water Bio-Decontamination

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 323
Author(s):  
Olga Ferreira ◽  
Patrícia Rijo ◽  
João Gomes ◽  
Ricardo Santos ◽  
Sílvia Monteiro ◽  
...  
Keyword(s):  
Biofilm Formation ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Environmental Risks ◽  
Flow Conditions ◽  
Industrial Systems ◽  
Ceramic Filters ◽  
Effective Strategies ◽  
Human Health Risks ◽  
Aquatic Medium ◽  
Biocide Release

Bio-contamination of water through biofouling, which involves the natural colonization of submerged surfaces by waterborne organisms, is a global socio-economic concern, allied to premature materials bio-corrosion and high human health risks. Most effective strategies release toxic and persistent disinfectant compounds into the aquatic medium, causing environmental problems and leading to more stringent legislation regarding their use. To minimize these side effects, a newly non-biocide-release coating strategy suitable for several polymeric matrices, namely polydimethylsiloxane and polyurethane (PU)-based coatings, was used to generate antimicrobial ceramic filters for water bio-decontamination. The best results, in terms of antimicrobial activity and biocide release, showed an expressed delay and a decrease of up to 66% in the population of methicillin-resistant Staphylococcus aureus bacteria on ceramic filters coated with polyurethane (PU)-based coatings containing grafted Econea biocide, and no evidence of biocide release after being submerged for 45 days in water. Biocidal PU-based surfaces were also less prone to Enterococcus faecalis biofilm formation under flow conditions with an average reduction of 60% after 48 h compared to a pristine PU-based surface. Biocidal coated filters show to be a potential eco-friendly alternative for minimizing the environmental risks associated with biofouling formation in water-based industrial systems.

Durability of ceramic filters in hot gas filtration

1993 ◽  
Vol 46 (1-2) ◽  
pp. 103-112 ◽  
Author(s):  
Timo Eriksson ◽  
Juhani Isaksson ◽  
Pekka Ståhlberg ◽  
Esa Kurkela ◽  
Vesa Helanti
Keyword(s):  
Gas Filtration ◽  
Ceramic Filters ◽  
Hot Gas ◽  
Hot Gas Filtration

scholarly journals Effect of Iron Modification on the Adsorption Property of Nitrogen Monoxide on Zeolite Y

1998 ◽  
Vol 106 (1229) ◽  
pp. 79-83 ◽  
Author(s):  
Yukichi SASAKI ◽  
Toshiyuki SUZUKI ◽  
Isao TATEYAMA ◽  
Yukari ISIKAWA ◽  
Akira SAJI ◽  
...  
Keyword(s):  
Zeolite Y ◽  
Adsorption Property ◽  
Nitrogen Monoxide ◽  
Iron Modification
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