Engineered biochar as a tool for nitrogen pollutants removal: preparation, characterization and sorption study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00342752" target="_blank" >RIV/68407700:21340/20:00342752 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.5004/dwt.2020.25750" target="_blank" >https://doi.org/10.5004/dwt.2020.25750</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5004/dwt.2020.25750" target="_blank" >10.5004/dwt.2020.25750</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Engineered biochar as a tool for nitrogen pollutants removal: preparation, characterization and sorption study

Popis výsledku v původním jazyce

In this study, engineered (chemically modified) biochars (pyrolyzed bamboo biomass) were used for the removal of oxidized and reduced nitrogen species from an aqueous solution. The physico-chemical properties of the prepared materials, such as surface functional groups, elemental composition, morphology, and specific surface area were investigated. The biochar surfaces were covered with Mg and Fe particles. The particles containing Mg and Fe species were observed in the form of nano-flakes within the biochar matrix. The efficiency of nitrate and ammonium removal was examined by sorption studies. The experimental data were fitted with sorption isotherms (Langmuir, Freundlich, and Dubinin–Raduskievich) and with kinetic models. The obtained data presented a higher sorption capacity for nitrate removal in the case of the engineered Fe-biochar and the engineered Mg-biochar compared to unmodified bamboo-based biochar. The maximum sorption capacity of modified samples decreased in the order Fe-biochar (Q = 10.35 mg g–1), Mg-biochar (Q = 9.13 mg g–1), and the lowest capacity was found in the unmodified biochar (Q = 4.41 mg g–1). In the case of ammo- nium removal, unmodified biochar with maximum sorption capacity (Q = 12.60 mg g–1), was more efficient than Fe-(Q = 5.66 mg g–1), and Mg-engineered biochars (Q = 3.23 mg g–1). The pseudo-second-order kinetic model and Langmuir isotherm model proved to be the most appropriate for the experimental sorption data. In addition, engineered Fe-biochar presented magnetic properties due to the presence of Fe2O3 and therefore, may be easily separated from the reaction mixtures.

Název v anglickém jazyce

Engineered biochar as a tool for nitrogen pollutants removal: preparation, characterization and sorption study

Popis výsledku anglicky

In this study, engineered (chemically modified) biochars (pyrolyzed bamboo biomass) were used for the removal of oxidized and reduced nitrogen species from an aqueous solution. The physico-chemical properties of the prepared materials, such as surface functional groups, elemental composition, morphology, and specific surface area were investigated. The biochar surfaces were covered with Mg and Fe particles. The particles containing Mg and Fe species were observed in the form of nano-flakes within the biochar matrix. The efficiency of nitrate and ammonium removal was examined by sorption studies. The experimental data were fitted with sorption isotherms (Langmuir, Freundlich, and Dubinin–Raduskievich) and with kinetic models. The obtained data presented a higher sorption capacity for nitrate removal in the case of the engineered Fe-biochar and the engineered Mg-biochar compared to unmodified bamboo-based biochar. The maximum sorption capacity of modified samples decreased in the order Fe-biochar (Q = 10.35 mg g–1), Mg-biochar (Q = 9.13 mg g–1), and the lowest capacity was found in the unmodified biochar (Q = 4.41 mg g–1). In the case of ammo- nium removal, unmodified biochar with maximum sorption capacity (Q = 12.60 mg g–1), was more efficient than Fe-(Q = 5.66 mg g–1), and Mg-engineered biochars (Q = 3.23 mg g–1). The pseudo-second-order kinetic model and Langmuir isotherm model proved to be the most appropriate for the experimental sorption data. In addition, engineered Fe-biochar presented magnetic properties due to the presence of Fe2O3 and therefore, may be easily separated from the reaction mixtures.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10400 - Chemical sciences

Projekt

<a href="/cs/project/EF16_019%2F0000728" target="_blank" >EF16_019/0000728: Výzkum ultrastopových izotopů a jejich využití v sociálních a environmentálních vědách urychlovačovou hmotnostní spektrometrií</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Desalination and Water Treatment

ISSN

1944-3994

e-ISSN

1944-3986

Svazek periodika

191

Číslo periodika v rámci svazku

July

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

318-331

Kód UT WoS článku

000548535500032

EID výsledku v databázi Scopus

2-s2.0-85098542280