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Microalgae biomass as a sustainable precursor to produce nitrogen-doped biochar for efficient removal of emerging pollutants from aqueous media

González Hourcade, Maria and Simões Dos Reis, Glaydson and Grimm, Alejandro and Dinh, Van Minh and Lima, Eder Claudio and Larsson, Sylvia and Gentili, Francesco (2022). Microalgae biomass as a sustainable precursor to produce nitrogen-doped biochar for efficient removal of emerging pollutants from aqueous media. Journal of Cleaner Production. 348 , 131280
[Research article]

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Abstract

Preparing sustainable and highly efficient biochars as adsorbents remains a challenge for organic pollutant management. Herein, a novel nitrogen-doped carbon material has been synthesized via a facile and sustainable single-step pyrolysis method using a wild mixture of microalgae as novel carbon precursor. Phosphoric acid (H3PO4) was employed as activation agent to generate pores in the carbon material. In addition, the effect of melamine (nitrogen source) was evaluated over the biochar properties by the N-doping process. The results showed that the biochar’s specific surface area (SSA) increased from 324 to 433 m2 g− 1 with the N-doping process. The N-doping process increased the percentage of micropores in the biochar structure. Chemical characterization of the biochars indicated that the N-doping process helped to increase the graphitization process of the biochar and the contents of oxygen and nitrogen groups on the carbon surface. The biochars were successfully tested to adsorb acetaminophen and treat two synthetic effluents, and the N-doped biochar presented the highest efficiency. The kinetics and equilibrium data were well represented by the General-order model and the Liu isotherm model, respectively. The maximum sorption capacities attained were 101.4 and 120.7 mg g− 1 for the non-doped and doped biochars, respectively. The acetaminophen adsorption mechanism suggests that the pore-filling was the dominant mechanism for acetaminophen uptake. The biochars could efficiently remove up to 74% of the contaminants in synthetic effluents.

Authors/Creators:González Hourcade, Maria and Simões Dos Reis, Glaydson and Grimm, Alejandro and Dinh, Van Minh and Lima, Eder Claudio and Larsson, Sylvia and Gentili, Francesco
Title:Microalgae biomass as a sustainable precursor to produce nitrogen-doped biochar for efficient removal of emerging pollutants from aqueous media
Series Name/Journal:Journal of Cleaner Production
Year of publishing :2022
Volume:348
Article number:131280
Number of Pages:15
ISSN:0959-6526
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:Microalgae precursor, Phosphoric acid activation, Nitrogen doping, Doped biochars, Acetaminophen adsorption, Pharmaceuticals effluents
URN:NBN:urn:nbn:se:slu:epsilon-p-116695
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116695
Additional ID:
Type of IDID
DOI10.1016/j.jclepro.2022.131280
ID Code:27578
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology
Deposited By: SLUpub Connector
Deposited On:20 Apr 2022 07:26
Metadata Last Modified:20 Apr 2022 07:31

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