Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Determination of surface functional groups on mechanochemically activated carbon cloth by Boehm method
In order to improve sorption properties of activated carbon cloth that can be used for wastewater purification, mechanochemical activation was performed in both inert and air atmosphere. Boehm method was used to follow the changes in the number and types of surface groups induced by mechanical milling. The number of the base groups of 0,2493 mmol/g is significantly smaller than the total amount of acidic functional groups, 2,5093 mmol/g. Among the acidic groups present on the surface, the most represented are phenolic groups (2.3846 mmol/g ), ie . > 95 % , the carboxylic groups are present far less (0.1173 mmol /g), ie. 4.5 %, while the presence of the lactone group on the surface of ACC is negligible (0.0074 mmol/g) ie. under 0.3 %. Mechanochemical activation lead to an increase in the number of acidic and basic groups on the surface of the ACC. The milling in inert atmosphere has dominant effect with respect to the changes in the total number of basic functional groups (compared to milling in an air atmosphere): the number of basic groups of the ACC was 0.8153 mmol/g milled under argon, 0.7933 mmol/g in the air; the number of acidic groups is 2.9807 mmol/g for a sample milled under argon and 3.5313 mmol/g for one milled in the air.
Determination of surface functional groups on mechanochemically activated carbon cloth by Boehm method
In order to improve sorption properties of activated carbon cloth that can be used for wastewater purification, mechanochemical activation was performed in both inert and air atmosphere. Boehm method was used to follow the changes in the number and types of surface groups induced by mechanical milling. The number of the base groups of 0,2493 mmol/g is significantly smaller than the total amount of acidic functional groups, 2,5093 mmol/g. Among the acidic groups present on the surface, the most represented are phenolic groups (2.3846 mmol/g ), ie . > 95 % , the carboxylic groups are present far less (0.1173 mmol /g), ie. 4.5 %, while the presence of the lactone group on the surface of ACC is negligible (0.0074 mmol/g) ie. under 0.3 %. Mechanochemical activation lead to an increase in the number of acidic and basic groups on the surface of the ACC. The milling in inert atmosphere has dominant effect with respect to the changes in the total number of basic functional groups (compared to milling in an air atmosphere): the number of basic groups of the ACC was 0.8153 mmol/g milled under argon, 0.7933 mmol/g in the air; the number of acidic groups is 2.9807 mmol/g for a sample milled under argon and 3.5313 mmol/g for one milled in the air.
Determination of surface functional groups on mechanochemically activated carbon cloth by Boehm method
Đukić Anđelka B. (Autor:in) / Vukelić Nikola S. (Autor:in) / Paskaš-Mamula Bojana M. (Autor:in) / Novaković Nikola B. (Autor:in) / Vujasin Radojka T. (Autor:in) / Milošević Sanja S. (Autor:in) / Matović Ljiljana Lj. (Autor:in)
2014
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Metadata by DOAJ is licensed under CC BY-SA 1.0
British Library Online Contents | 1996
British Library Online Contents | 1999
Mechanochemically activated nano-aluminium Oxidation behaviour
| British Library Online Contents | 2004
| British Library Online Contents | 2011
Mechanochemically activated bottom ash-fly ash geopolymer
| Elsevier | 2021