Nanoporous Activated Carbon Derived via Pyrolysis Process of Spent Coffee: Structural Characterization. Investigation of Its Use for Hexavalent Chromium Removal

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73603730" target="_blank" >RIV/61989592:15310/20:73603730 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27640/20:10247211

Výsledek na webu

<a href="https://www.mdpi.com/2076-3417/10/24/8812/htm" target="_blank" >https://www.mdpi.com/2076-3417/10/24/8812/htm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/app10248812" target="_blank" >10.3390/app10248812</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nanoporous Activated Carbon Derived via Pyrolysis Process of Spent Coffee: Structural Characterization. Investigation of Its Use for Hexavalent Chromium Removal

Popis výsledku v původním jazyce

This work deals with the development of an activated carbon adsorber via the exploitation of spent coffee waste. Economic and environmental benefits from such processes are extended. The application on hexavalent chromium removal was tested. Hexavalent chromium (Cr(VI)) is a heavy metal that is highly soluble and exhibits toxic effects on biological systems. Nevertheless, it is used in many industrial applications. The adsorption process of Cr(VI), using activated carbon (AC), is under investigation globally. On the other hand, around six million tons of spent coffee is sent to landfill annually. In the spirit of cyclic economy, this research investigated the production of AC from spent coffee for the removal of Cr(VI) from wastewater. The AC was produced via pyrolysis process under a nitrogen atmosphere. Chemical activation using potassium hydroxide (KOH) occurred simultaneously with the pyrolysis process. The produced AC was tested as an absorber of Cr(VI). The best fitted kinetic model was the diffusion-chemisorption model. A 24-h adsorption experiment was carried out using a solution with a pH of 3 and an initial Cr(VI) concentration of 54.14 ppm. This resulted in an experimental maximum capacity of 109 mg/g, while the theoretical prediction was 137 mg/g. It also resulted in an initial adsorption rate (r(i)) of 110 (mg/(g h)). The Brunauer-Emmett-Teller surface area (S-gBET) was 1372 m(2)/g, the Langmuir surface area (S-gLang.) was 1875 m(2)/g, and the corrugated pore structure model surface area (S-gCPSM) was 1869 m(2)/g. The micropore volume was 84.6%, exhibiting micropores at D-micro1 = 1.28 and D-micro2 = 1.6 nm. The tortuosity factor (tau) was 4.65.

Název v anglickém jazyce

Nanoporous Activated Carbon Derived via Pyrolysis Process of Spent Coffee: Structural Characterization. Investigation of Its Use for Hexavalent Chromium Removal

Popis výsledku anglicky

This work deals with the development of an activated carbon adsorber via the exploitation of spent coffee waste. Economic and environmental benefits from such processes are extended. The application on hexavalent chromium removal was tested. Hexavalent chromium (Cr(VI)) is a heavy metal that is highly soluble and exhibits toxic effects on biological systems. Nevertheless, it is used in many industrial applications. The adsorption process of Cr(VI), using activated carbon (AC), is under investigation globally. On the other hand, around six million tons of spent coffee is sent to landfill annually. In the spirit of cyclic economy, this research investigated the production of AC from spent coffee for the removal of Cr(VI) from wastewater. The AC was produced via pyrolysis process under a nitrogen atmosphere. Chemical activation using potassium hydroxide (KOH) occurred simultaneously with the pyrolysis process. The produced AC was tested as an absorber of Cr(VI). The best fitted kinetic model was the diffusion-chemisorption model. A 24-h adsorption experiment was carried out using a solution with a pH of 3 and an initial Cr(VI) concentration of 54.14 ppm. This resulted in an experimental maximum capacity of 109 mg/g, while the theoretical prediction was 137 mg/g. It also resulted in an initial adsorption rate (r(i)) of 110 (mg/(g h)). The Brunauer-Emmett-Teller surface area (S-gBET) was 1372 m(2)/g, the Langmuir surface area (S-gLang.) was 1875 m(2)/g, and the corrugated pore structure model surface area (S-gCPSM) was 1869 m(2)/g. The micropore volume was 84.6%, exhibiting micropores at D-micro1 = 1.28 and D-micro2 = 1.6 nm. The tortuosity factor (tau) was 4.65.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GX19-27454X" target="_blank" >GX19-27454X: Ovlivnění elektronických vlastností organometalických molekul pomocí jejich nekovalentních interakcí s rozpouštědly, ligandy a 2D nanosystémy</a><br>

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Applied Sciences-Basel

ISSN

2076-3417

e-ISSN

—

Svazek periodika

10

Číslo periodika v rámci svazku

24

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

20

Strana od-do

"8812-1"-"8812-20"

Kód UT WoS článku

000602961100001

EID výsledku v databázi Scopus

2-s2.0-85097552422