Jump to main content
Jump to site search

Issue 24, 2017
Previous Article Next Article

A flexible magnesium silicate coated electrospun fiber adsorbent for high-efficiency removal of a toxic cationic herbicide

Author affiliations

Abstract

Organic cationic herbicides have been widely used in modern agriculture and their discharge into the environment has become a serious problem. In this study, magnesium silicate functionalized PAN (MgSi/PAN) fibers were synthesized using an electrospinning technique and a hydrothermal approach, which were explored as attractive adsorbents for cationic herbicide polluted wastewater treatments. The batch adsorption behavior toward the cationic herbicide diquat by MgSi/PAN fibers was investigated, including effects of pH, adsorption kinetics, adsorption isotherms and ionic strength. It was found that the adsorption isotherm of MgSi/PAN composite fibers was fitted better with the Langmuir isotherm model. The adsorption behaviors showed a maximum adsorption capacity of 197.53 mg g−1 for diquat, which was higher than those of many other adsorbents. Kinetics of the diquat adsorption were found to follow a pseudo-second-order rate equation. Meanwhile, the adsorbent had a good recyclability and the removal efficiency remained at 83% after five adsorption–desorption cycles. Most importantly, the MgSi/PAN fibers could remove 99.1% of diquat by dynamic filtration experiment. These findings demonstrate that the MgSi/PAN fiber membranes could be potentially applied to the efficient removal of diquat in wastewater treatment.

Graphical abstract: A flexible magnesium silicate coated electrospun fiber adsorbent for high-efficiency removal of a toxic cationic herbicide

Back to tab navigation

Supplementary files

Publication details

The article was received on 23 Aug 2017, accepted on 06 Nov 2017 and first published on 07 Nov 2017


Article type: Paper
DOI: 10.1039/C7NJ03168H
Citation: New J. Chem., 2017,41, 15601-15611
  •   Request permissions

    A flexible magnesium silicate coated electrospun fiber adsorbent for high-efficiency removal of a toxic cationic herbicide

    Y. Li, R. Zhao, S. Chao, B. Sun, N. Zhang, J. Qiu, C. Wang and X. Li, New J. Chem., 2017, 41, 15601
    DOI: 10.1039/C7NJ03168H

Search articles by author

Spotlight

Advertisements