Naslov
Effect of chemical modification onto structural characteristics of activated carbons

Autori
Habuda-Stanić, Mirna ; Gašo-Sokač, Dajana ; Ergović Ravančić, Maja ; Šiljeg, Mario ; Nujić, Marija

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
XXIV Croatian Meeting of Chemists and Chemical Engineers - Book of Abstracts / Ukić, Šime ; Bolanča, Tomislav - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI) ; Hrvatsko kemijsko drustvo, 2015, 259-259

ISBN
978-953-6894-54-3

Skup
XXIV Croatian Meeting of Chemists and Chemical Engineers

Mjesto i datum
Zagreb, Hrvatska, 21.04.2015. - 24.04.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
activated carbons; chemical modification; structural analysis

Sažetak
Activated carbons are one of the most used adsorption materials in drinking water treatment produced from carbonaceous materials by two different processes: physical and chemical activation. The physical activation implies material pyrolysis at temperature up to 900 °C and activation of formed char using nitrogen or argon at high temperature while the chemical activation implies carbonization of chemically impregnated carbonaceous material which provides a large surface area able to adsorb many water contaminants. The efficiency and adsorption capacities of activated carbons depend on their physical and chemical structure. Recent studies showed that additional chemical modification of activated carbon’s surface by strong oxidizing agents and subsequent chemical impregnation increased selectivity of activated carbons for some water contaminants such as arsenic, fluorides, nitrate, lead, etc. This study investigated the effect of chemical modification onto structural characteristics of four commercially available activated carbons obtained from different carbonaceous materials. Activated carbons were oxidized using conc. H2O2, conc. HNO3 and mixture of conc. HNO3 and conc. H2SO4. Effects of chemical modification onto adsorbents surface and structure of used activated carbons were determined using Fourier Transform Infrared Spectrometry (FTIR) and Thermal Gravimetric Analysis (TGA).

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

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