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• W3111844522 abstract "Abstract In this work, quinoa straw (QS) is considered as a sustainable biomass resource to produce adsorbent materials for wastewater treatment. Two materials, a porous carbon material derived from QS (PCQS) and a Fe 3 O 4 -containing composite material based on the PCPS (Fe 3 O 4 @PCQS), were prepared. PCQS was prepared via carbonization and subsequent chemical activation of the QS using NaOH. Thereafter, PCQS was characterized by SEM, TEM, XRD, IR, XPS, and N 2 adsorption-desorption analysis. As a carbon material with heterogeneous pores, PCQS has a BET specific surface area of 3435.21 m 2 g −1 , which is about 175 times higher than that of the precursor QS (19.60 m 2 g −1 ). The PCQS had an adsorption capacity of 1778.1 mg g −1 toward rhodamine B (RhB), and the adsorption followed pseudo-second-order kinetics and the Freundlich isotherm model. The PCQS was further modified by synthesizing Fe 3 O 4 magnetic nanoparticles on the surface of PCQS to give Fe 3 O 4 @PCQS. The adsorption capacity of Fe 3 O 4 @PCQS toward RhB reached 1156.2 mg g −1 , and it could be rapidly separated from water by applying an external magnetic field. The PCQS and Fe 3 O 4 @PCQS exhibited acceptable reusability which was evaluated through ten successive adsorption/desorption cycles. In summary, the adsorption capacities of PCQS and Fe 3 O 4 @PCQS toward RhB are comparable with most current adsorbents, including the graphene-based materials, which shows that QS is a promising biomass feedstock to prepare carbon-based materials and composites." @default.
• W3111844522 created "2020-12-21" @default.
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• W3111844522 date "2020-12-01" @default.
• W3111844522 modified "2023-09-27" @default.
• W3111844522 title "Preparation of a quinoa straw-derived porous carbon material and a Fe₃O₄-contained composite material for removal of rhodamine B from water" @default.
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• W3111844522 doi "https://doi.org/10.1088/2053-1591/abd0a5" @default.
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