Surfactant-modified montmorillonite as a nanosized adsorbent for removal of an insecticide: kinetic and isotherm studies

HASSANI A., KHATAEE A., KARACA S., SHIRZAD-SIBONI M.

ENVIRONMENTAL TECHNOLOGY, vol.36, no.24, pp.3125-3135, 2015 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 36 Issue: 24
  • Publication Date: 2015
  • Doi Number: 10.1080/09593330.2015.1054319
  • Journal Name: ENVIRONMENTAL TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3125-3135
  • Keywords: adsorption, diazinon, nanoclay, modified clay, montmorillonite, AQUEOUS-SOLUTION, TEXTILE DYE, ORGANO-MONTMORILLONITE, ANIONIC DYE, ADSORPTION, DIAZINON, PESTICIDE, WATER, EQUILIBRIUM, DEGRADATION
  • Ataturk University Affiliated: Yes

Abstract

Surfactant-modified montmorillonites (MMT) were prepared using trimethyloctylammonium bromide (TMOAB) and employed as a nanosized adsorbent to remove diazinon from aqueous solutions. The prepared adsorbent was characterized using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX). The dependence of removal efficiency on initial diazinon concentration, amount of adsorbent, pH of the solution and ionic strength was investigated. The affinity sequence for ion adsorption on TMOAB/MMT was in the order: without anion> sodium carbonate> sodium bicarbonate> sodium sulphate> sodium chloride. The adsorption kinetic and isotherm were best fit by a pseudo-second-order kinetic and Langmuir isotherm models, respectively.