纳米复合材料ZrO<sub>2</sub>@rGO吸附脱除水溶液中的阿散酸

doi:10.11896/cldb.20110076

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Abstract Arsanilic acid (ASA), a widely used organic-arsenic veterinary drug, has greatly attracted attention due to its potential environmental threat.This work reported a ZrO₂@rGO nanocomposite with ZrO₂ nanoparticles growing on reduced graphene oxide (rGO) by a one-pot method for adsorptive removal of ASA from aqueous solution. The ZrO₂ nanoparticles 20—50 nm in diameter are relatively evenly and densely covered on the rGO surface according to the observation of transmission and scanning electron microscope. X-ray diffraction patterns of ZrO₂@rGO indicate the mixture of the monoclinic and tetragonal phases of ZrO₂. The adsorptive capacity of ASA by the ZrO₂@rGO is 177.9 mg·g^-1, and the adsorption equilibrium of ASA by the ZrO₂@rGO can be achieved within 45 min. The adsorption amount of ASA is independent of pH in the range of 2.9—7.1, decreases at pH>7.1 and increases with the increase in temperature from 25 ℃ to 45 ℃. The removal of ASA by the ZrO₂@rGO is independent of ionic strengths below 0.1 mol·L^-1. After five cycles of the adsorption-desorption, the adsorptive amount of ASA by the regenerative ZrO₂@rGO can retain 85% of that by the fresh sorbents. The adsorption process of ASA by the ZrO₂@rGO can be described by the Langmuir and the pseudo-second-order equations.

Key words： nanocomposites organic-arsenic adsorptive removal

Published: 10 September 2022 Online: 2022-09-10

CLC number:

O647.3

Fund:financially supported by Liaoning Natural Science Foundation Combined with Open Foundation of Shenyang National Laboratory for Materials Sciences (2015021019).

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	ZHU Mengya
	ZOU Shanjuan
	YOU Nan

Cite this article:

ZHU Mengya,ZOU Shanjuan,YOU Nan. ZrO₂@rGO Nanocomposites for Adsorptive Removal of Arsanilic Acid from Aqueous Solution[J]. Materials Reports, 2022, 36(17): 20110076-6.

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http://www.mater-rep.com/EN/10.11896/cldb.20110076 OR http://www.mater-rep.com/EN/Y2022/V36/I17/20110076

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