Use of polyethylene films photografted with 2‐(dimethylamino)ethyl methacrylate as a potential adsorbent for removal of chromium (VI) from aqueous medium

Abstract

A new polymeric adsorbent material based on polyethylene (PE) was prepared by photografting of 2‐(dimethylamino)ethyl methacrylate (DMAEMA) as a positively chargeable monomer to a PE film. The effects of the experimental parameters, such as the pH value, temperature, and grafted amount on adsorption of chromium(VI) (Cr(VI)) ions were investigated for the DMAEMA‐grafted PE (PE‐g‐PDAMEMA) films. The maximum adsorption capacity was obtained at the initial pH value of 3.0 for a PE‐g‐PDMAEMA film with 1.8 mmol/g and the maximum adsorption capacity obtained was higher than or compatible to those of many of the other polymeric adsorbents prepared for Cr(VI) ions. The adsorption kinetics obeyed the mechanism of the pseudo‐second order kinetic model and adsorption of Cr(VI) ions on PE‐g‐PDMAEMA films was well expressed by the Langmuir isotherm model. A high Langmuir adsorption constant suggests that the adsorption of Cr(VI) ions occurs between protonated dimethylamino groups and HCrO4− ions mainly through the electrostatic interaction. Cr(VI) ions adsorbed were successfully desorbed from a PE‐g‐PDMAEMA film in solutions of NaCl, NH4Cl, NH4Cl containing NaOH, and NaOH and a PE‐g‐PDMAEMA film was regenerated and repeatedly used for adsorption of Cr(VI) ions without appreciable loss in the adsorption capacity. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43360.

Preparation of Amidoxime Adsorbent by Radiation Induced Grafting of Acrylonitrile on Polyethylene Film and Its Application in Cr(VI) Removal

“…[39][40][41][42] A polymeric adsorbent material based on PE was prepared by photo grafting of 2-(dimethylamino)ethyl methacrylate (DMAEMA) monomer on to a PE film and investigated for Cr(VI) removal. 43 Composite particles were synthesised using titanium oxide attached to PE films by plasma techniques and used for the removal of Cr(VI) from aqueous solutions in batch systems. 44 Present study focuses on preparation of a new adsorbent by radiation induced grafting of acrylonitrile (AN) on PE films and its application in Cr(VI) removal.…”

Evaluation of Adsorption Behavior of Chromium (VI) on 2-(Dimethylamino)ethyl Methacrylate Grafted Polyethylene Meshes

“…The pH value of an aqueous K2Cr2O7 solution at 0.20 mM was adjusted to 3.0 with diluted HCl. The calibration curve of Cr(VI) ions was prepared at the isosbestic point of 338.2 nm (r > 0.999, log ε = 3.454 dm 3 /mol•cm) [10]. The PE-g-PDMAEMA and PE-g-QPDMAEMA meshes cut into 1.0×1.0 cm 2 were beforehand immersed in a pH 3.0 HCl solution.…”

“…Solutions of NaCl, NH4Cl, and NaOH at different concentrations were prepared as an eluent for desorption of Cr(VI) ions from PE-g-PDMAEMA meshes [10][11][12][13]. Cr(VI) ion-loaded PE-g-PDMA-EMA meshes were immersed in the above eluents at 30°C, and then the solutions were mildly stirred.…”

“…However, some adsorbents have low adsorption capacity and others have difficulty in regeneration or reuse. Therefore, we attracted attention to the adsorbents bearing amino groups as a weakly basic functional group to enhance adsorption properties [10]. The Cr(VI) ion adsorption behavior of the polyethylene (PE) films grafted with 2-(dimethylamino)ethyl methacrylate (DMAEMA) was investigated in detail and the obtained results revealed that the DMAEMA-grafted PE (PE-g-PDMAEMA) films were prepared with the Cr(VI) ion adsorption capacity higher than or comparable to those of other adsorbents [10].…”

Functionalization of Halloysite Nanotubes with Poly(amidoamine) Dendrimers and Their Application to Adsorptive Removal of Hexavalent Chromium

“…The mixtures were mildly stirred at 30°C for 72 h. The adsorption capacity was calculated from Eq. (2) (log ε=3.454 dm 3 /mol ･ cm) at 338.2 nm as the isosbestic point [10,11]:…”