Amino-functionalized magnetic cellulose nanocomposite as adsorbent for removal of Cr(VI): Synthesis and adsorption studies

By Xitong Sun, Liangrong Yang, Qian Li, Jun-mei Zhao, Xiaopei Li, Xiaoqin Wang, Huizhou Liu. 2014

359 citations recorded by the source corpus.

A novel amino-functionalized magnetic cellulose composite was prepared by a process involving: (1) synthesis of magnetic silica nanoparticles using the co-precipitation method followed by the hydrolysis of sodium silicate, (2) coating with cellulose through the regeneration of cellulose dissolved in 7 wt% NaOH/12 wt% urea aqueous solvent, (3) grafting of glycidyl methacrylate using cerium initiated polymerization and (4) ring-opening reaction of epoxy groups with ethylenediamine to yield amino groups. Once generated, the resulting composite was tested for its ability to remove Cr(VI) from an aqueous solution in batch experiments. The results demonstrated that Cr(VI) adsorption was highly pH dependent. The optimized pH value was 2.0. The adsorption isotherms of the adsorbent fit the Langmuir model, with the maximum adsorption capacity of 171.5 mg/g at 25 degrees C. The adsorption rate was considerably fast, and the adsorption reached equilibrium within 10 min. The obtained thermodynamic parameters showed that the adsorption of Cr(VI) onto the adsorbent was an exothermic and spontaneous process. In addition, the Cr(VI) ions could be effectively desorbed using a 0.1 mol/L NaOH solution and the adsorbent exhibited a good reusability. The composite material should be a promising adsorbent for Cr(VI) removal, with the advantages of high adsorption capacity, rapid adsorption rate and convenient recovery under magnetic field. (C) 2013 Elsevier B.V. All rights reserved.

Subfields: Biomaterials, Organic Chemistry, Water Science and Technology

View Paper: https://www.semanticscholar.org/paper/afd7d353c80021a7bafb4826a119a296302d9313

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Biomaterials

In Organic Chemistry

In Water Science and Technology

Citations in the corpus

Facile synthesis of polypyrrole decorated reduced graphene oxide–Fe3O4 magnetic composites and its application for the Cr(VI) removal (2015, neutral): “0 [29].”
Remediation of Heavy Metals by Biomolecules: A Review (2015, background): “…is generally used to describe the sorption behavior of some biomolecules such as cellulose (Karnitz Junior et al., 2009; Monier et al., 2014; Sun et al., 2014), chitosan (Allouche et al., 2014; He et al., 2014; Vandenbossche et al., 2013), alginate (Bée et al., 2011; Ibáñez and Aracena,…”
A review on modification methods to cellulose-based adsorbents to improve adsorption capacity. (2016, background): “NaOH solution has been found useful for regenerating Cr(VI) from aminofunctionalized magnetic cellulose nanocomposite (Sun et al., 2014).”