Nanocomposites of [Fe.sub.2]O.sub.3@rGO for adsorptive removal of arsanilic acid from aqueous solution.

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Date: Mar. 2021
From: Korean Journal of Chemical Engineering(Vol. 38, Issue 3)
Publisher: Springer
Document Type: Report; Brief article
Length: 269 words

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Abstract :

Keywords: Arsanilic Acid; Nanocomposites; Graphene; Iron Oxide Abstract Arsanilic acid (ASA), an organic-arsenic veterinary drug used widely, has greatly attracted attention due to its potential threats. We report the nanocomposites of the [alpha][-Fe.sub.2]O.sub.3 nanoparticles growth on reduced graphene oxide (rGO) by a one-pot method. The [alpha][-Fe.sub.2]O.sub.3 nanoparticles are densely covered on the surface of rGO according to the observations of transmission and scanning electron microscope. The adsorptive capacity (357.4±11.2 mg g.sup.-1) of the [Fe.sub.2]O.sub.3@rGO nanocomposites for ASA, which was more than the sum of adsorptive capacities of the pure [alpha][-Fe.sub.2]O.sub.3 nanoparticles and rGO, revealed a remarkable enhancement due to the synergetic effect of multiple interactions and the good dispersion of [alpha]-Fe2O.sub.3 nanoparticles with more active binding sites in the Fe2O.sub.3@rGO nanocomposites. The adsorption equilibrium of ASA onto the [Fe.sub.2]O.sub.3@rGO nanocomposites was achieved for 60 min, and the adsorption of ASA was dependent of pH and temperature, and independent of the concentration of humic acid ranging from 0 to 20 mg L.sup.-1. After five cycles of adsorption-desorption, the adsorptive amounts of ASA by the regenerative sorbent still retained 85% of adsorptive amount by the fresh sorbents. The adsorption process of ASA can be described by the Langmuir and the pseudo-second-order equations and is exothermic and spontaneous according to thermodynamic analysis. Author Affiliation: (1) Department of Chemistry, Shenyang Medical College, 110034, Shenyang, China (2) College of Chemical Engineering, University of Science and Technology, 114051, Liaoning, Anshan, China (a) (c) Article History: Registration Date: 02/28/2020 Received Date: 06/06/2020 Accepted Date: 11/24/2020 Online Date: 03/05/2021 Byline: Li-Li Sui (corresponding author) (1, a), Li-Na Peng (2), Hong-Bo Xu (corresponding author) (2, c)

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Gale Document Number: GALE|A654050203