Microalgae-derived nanoporous biochar for ammonia removal in sustainable wastewater treatment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F22%3A00563534" target="_blank" >RIV/86652079:_____/22:00563534 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/22:PU147106

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2213343722013872?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2213343722013872?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jece.2022.108514" target="_blank" >10.1016/j.jece.2022.108514</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microalgae-derived nanoporous biochar for ammonia removal in sustainable wastewater treatment

Popis výsledku v původním jazyce

Ammonia is a critical pollutant in biological wastewater and is not easily separated mechanically due to similar physical properties (e.g., molecular weight, polarity, etc.) to water. Currently, an agent for ammonia removal from wastewater using zeolites must be mined, which is not environmental-friendly. The development of a sustainable and biological absorbent for ammonia-containing wastewater is therefore desirable. Since microalgae can grow rapidly by feeding on waste nutrients in wastewater and up-taking carbon dioxide flue gas, it is of high interest to be used as a bio-absorbent for secondary wastewater treatment. The problem statement of this work is to explore and understand the use of microalgae as a biological source for effective ammonia absorbent. In this work, nanoporous microalgae biochar (NP-MBC) is proposed to be synthesized by using formaldehyde-stabilized hydrothermal and KOH-activated high-temperature pyrolysis. The novelty of this work is that the mechanism for NP-MBC ammonia removal is being uncovered via spectroscopic and sorption analysis. Formaldehyde-stabilization maintains the morphology of the microalgae particles for higher quality pore formation during pyrolysis. Pyrolysis temperatures up to 700 degrees C improve pore structure and surface chemistry of the NP-MBC, leading to a specific surface area of 1137 m(2).g(-1) and increased activation of COO- groups for ammonia adsorption. Further pyrolysis at 800 degrees C damages the textual characteristics of the synthesized NP-MBC, causing pores agglomeration and lower ammonia adsorption. The best ammonia adsorption performance was obtained on NP-MBC prepared by pyrolysis at 700 degrees C with maximum ammonia removal of 72 % (within 120 min) and adsorption capacity over 69 mg.g(-1). Nanoporous structure by stabilized hydrothermal treatment and high-temperature pyrolysis are interesting as a paradigm to convert particulate biomass feedstock to functional material with tunable properties.

Název v anglickém jazyce

Microalgae-derived nanoporous biochar for ammonia removal in sustainable wastewater treatment

Popis výsledku anglicky

Ammonia is a critical pollutant in biological wastewater and is not easily separated mechanically due to similar physical properties (e.g., molecular weight, polarity, etc.) to water. Currently, an agent for ammonia removal from wastewater using zeolites must be mined, which is not environmental-friendly. The development of a sustainable and biological absorbent for ammonia-containing wastewater is therefore desirable. Since microalgae can grow rapidly by feeding on waste nutrients in wastewater and up-taking carbon dioxide flue gas, it is of high interest to be used as a bio-absorbent for secondary wastewater treatment. The problem statement of this work is to explore and understand the use of microalgae as a biological source for effective ammonia absorbent. In this work, nanoporous microalgae biochar (NP-MBC) is proposed to be synthesized by using formaldehyde-stabilized hydrothermal and KOH-activated high-temperature pyrolysis. The novelty of this work is that the mechanism for NP-MBC ammonia removal is being uncovered via spectroscopic and sorption analysis. Formaldehyde-stabilization maintains the morphology of the microalgae particles for higher quality pore formation during pyrolysis. Pyrolysis temperatures up to 700 degrees C improve pore structure and surface chemistry of the NP-MBC, leading to a specific surface area of 1137 m(2).g(-1) and increased activation of COO- groups for ammonia adsorption. Further pyrolysis at 800 degrees C damages the textual characteristics of the synthesized NP-MBC, causing pores agglomeration and lower ammonia adsorption. The best ammonia adsorption performance was obtained on NP-MBC prepared by pyrolysis at 700 degrees C with maximum ammonia removal of 72 % (within 120 min) and adsorption capacity over 69 mg.g(-1). Nanoporous structure by stabilized hydrothermal treatment and high-temperature pyrolysis are interesting as a paradigm to convert particulate biomass feedstock to functional material with tunable properties.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10606 - Microbiology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Journal of Environmental Chemical Engineering

ISSN

2213-3437

e-ISSN

2213-3437

Svazek periodika

10

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

108514

Kód UT WoS článku

000870232900004

EID výsledku v databázi Scopus

2-s2.0-85138335022