▎ 摘　　要

Here, we report a magnetic nanoparticles (Fe(3)O(4)NPs) decorated with beta-Cyclodextrins (CDs)-functionalized graphene oxide (GO) (beta-CDs-GO@Fe(3)O(4)NPs) have been synthesized via chemical reaction, this adsorbent has number of hydroxyl & carboxyl group which shows excellent water dispersibility and superior magnetic property, additionally this can be utilized as an efficient adsorbent to enhance the adsorption of As(III)/As(V). The physicochemical properties of the adsorbent prior to and after adsorption of As(III)/As(V) were characterized extensively using Powder-X-ray diffraction (Powder-XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), Thermogravimetric analysis (TGA), High resolution transmission electron microscopes (HR-TEM), Superconducting quantum interference device (SQUID), Zeta potential, Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopes & elemental analysis (SEM & EDX). Batch adsorption experiments were conducted to study the various factors such as effect of pH, isotherms, kinetics, thermodynamics were studied with a view to understand the adsorption efficiency, while the data of adsorption isotherms and kinetics were better fitted by Freundlich isotherm model and the pseudo second-order kinetic model, respectively. The free energy change Delta G degrees decreased with increase temperature and the positive Delta H degrees and Delta S degrees values indicates that endothermic nature of adsorption and increased randomness at the adsorbent-solution interface. The mechanism of adsorption has been discussed in detail and these studies provide a simple method for the preparation of smart adsorbent. Regeneration of the adsorbent was accomplished by sodium hydroxide and this adsorbent could be reused with quantitative recovery of two adsorption-desorption cycles. In addition to that, efficacy of the potential novel adsorbent has been examined in the adsorption As(V)/As(III) from aqueous solutions. (C) 2017 Elsevier B.V. All rights reserved.