CARBON MATERIALS PREPARED FROM CIGARETTE FILTERS APPLIED FOR CLOFIBRIC ACID ADORPTION

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F21%3A73607226" target="_blank" >RIV/61989592:15640/21:73607226 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.confer.cz/nanocon/2020/read/3733-carbon-materials-prepared-from-cigarette-filters-applied-for-clofibric-acid-adsorption.pdf" target="_blank" >https://www.confer.cz/nanocon/2020/read/3733-carbon-materials-prepared-from-cigarette-filters-applied-for-clofibric-acid-adsorption.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

CARBON MATERIALS PREPARED FROM CIGARETTE FILTERS APPLIED FOR CLOFIBRIC ACID ADORPTION

Popis výsledku v původním jazyce

Chars and carbon membranes were prepared from fresh and smoked cigarette filters, and used as adsorbents for clofibric acid removal. Carbonization of cigarette filters took place at 650, 750 and 900 degrees C, whereas membranes were synthesized by filter dissolution in acetone, using NaCl (porogen) and glycerol (plasticizer). Acid mediated carbonization (225 and 250 degrees C) of the membranes was performed. Solution pH was monitored throughout the adsorption experiments. The chars are basic powders with apparent surface areas up to 494 m(2) g(-1) and a porosity composed by supermicropores (0.7-2 nm wide) and mesopores (2-50 nm wide), allowing clofibric acid (critical dimension 0.6 nm) to access all adsorption sites. Carbonization of smoked filters promoted higher porosity levels and SEM analysis showed that a more extensive carbonization occurred in the outer surface of the chars particles. The presence of TiO2 particles was confirmed in all the chars. Pores were homogeneously created at the membranes surface. Acidic carbon membranes (pH(PZC) approximate to 3.7) were obtained with different degrees of porosity, proportional to the pyrolysis temperature. Both forms of clofibric acid (protonated and deprotonated) were readily adsorbed onto the carbon materials, with exception of the chars prepared at 900 degrees C, which adsorbed predominantly the deprotonated form. In equilibrium, an inverse correlation between solution pH and concentration of the pollutant was observed, and higher uptakes were observed for experiments with solution pH values above 5, suggesting that adsorption of the neutral species contributed significantly to the overall removal.

Název v anglickém jazyce

CARBON MATERIALS PREPARED FROM CIGARETTE FILTERS APPLIED FOR CLOFIBRIC ACID ADORPTION

Popis výsledku anglicky

Chars and carbon membranes were prepared from fresh and smoked cigarette filters, and used as adsorbents for clofibric acid removal. Carbonization of cigarette filters took place at 650, 750 and 900 degrees C, whereas membranes were synthesized by filter dissolution in acetone, using NaCl (porogen) and glycerol (plasticizer). Acid mediated carbonization (225 and 250 degrees C) of the membranes was performed. Solution pH was monitored throughout the adsorption experiments. The chars are basic powders with apparent surface areas up to 494 m(2) g(-1) and a porosity composed by supermicropores (0.7-2 nm wide) and mesopores (2-50 nm wide), allowing clofibric acid (critical dimension 0.6 nm) to access all adsorption sites. Carbonization of smoked filters promoted higher porosity levels and SEM analysis showed that a more extensive carbonization occurred in the outer surface of the chars particles. The presence of TiO2 particles was confirmed in all the chars. Pores were homogeneously created at the membranes surface. Acidic carbon membranes (pH(PZC) approximate to 3.7) were obtained with different degrees of porosity, proportional to the pyrolysis temperature. Both forms of clofibric acid (protonated and deprotonated) were readily adsorbed onto the carbon materials, with exception of the chars prepared at 900 degrees C, which adsorbed predominantly the deprotonated form. In equilibrium, an inverse correlation between solution pH and concentration of the pollutant was observed, and higher uptakes were observed for experiments with solution pH values above 5, suggesting that adsorption of the neutral species contributed significantly to the overall removal.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

<a href="/cs/project/EF16_019%2F0000754" target="_blank" >EF16_019/0000754: Nanotechnologie pro budoucnost</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

NANOCON Conference Proceedings - International Conference on Nanomaterials

ISBN

978-80-87294-98-7

ISSN

2694-930X

e-ISSN

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Počet stran výsledku

5

Strana od-do

294-299

Název nakladatele

TANGER Ltd

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

21. 10. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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