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Cellulose nanocrystals/graphene oxide composite for the adsorption and removal of levofloxacin hydrochloride antibiotic from aqueous solution

Citation

Tao, Junhong et al. (2020), Cellulose nanocrystals/graphene oxide composite for the adsorption and removal of levofloxacin hydrochloride antibiotic from aqueous solution, Dryad, Dataset, https://doi.org/10.5061/dryad.47d7wm39s

Abstract

Residual antibiotics in water are often persistent organic pollutants. The purpose of this study was to prepare a cellulose nanocrystals/graphene oxide composite (CNCs-GO) with a three-dimensional structure for the removal of the antibiotic levofloxacin hydrochloride (Levo-HCl) in water by adsorption. The Scanning Electron Microscope (SEM), Fourier Transform Infrared (FT-IR), Energy dispersive spectroscopy (EDS), X-ray Photoelectron Spectroscopy (XPS) and other characterization methods were used to study the physical structure and chemical properties of the CNCs-GO. The three-dimensional structure of the composite material rendered a high surface area and electrostatic attraction, resulting in an increased adsorption capacity of the CNCs-GO for Levo-HCl. Based on the Box–Behnken design, the effects of different factors on the removal of Levo-HCl by the CNCs-GO were explored. The composite material exhibited good antibiotic adsorption capacity, with a removal percentage exceeding 80.1% at an optimal pH of 4, adsorbent dosage of 1.0 g L⁻1, initial pollutant concentration of 10.0 mg L⁻1, and contact time of 4 h. The adsorption isotherm was well fitted by the Sips model, and kinetics studies demonstrated that the adsorption process conformed to a quasi-second-order kinetics model. Consequently, the as-synthesized CNCs-GO demonstrate good potential for the effective removal of antibiotics such as levofloxacin hydrochloride from aqueous media.

Methods

single-factor experiment

Material characterization

Adsorption kinetics

Adsorption isotherm

Response surface method

Usage Notes

Use origin, design-expert10.0, xpsprak, jade

Funding

the National Natural Science Foundation of China, Award: U1803244

the National Key R&D Program of China , Award: 2017YFC0404304

the Key Science and Technology Project in special issues of Bingtuan, Award: 2019DB007, 2019AB035

the National Natural Science Foundation of China, Award: No.51609260

the National Natural Science Foundation of China, Award: U1803244

the National Key R&D Program of China, Award: 2017YFC0404304

the Key Science and Technology Project in special issues of Bingtuan, Award: 2019DB007, 2019AB035