Paraquat adsorption onto clays and organoclays from aqueous solution

SEKİ Y., YURDAKOÇ M. K.

JOURNAL OF COLLOID AND INTERFACE SCIENCE, vol.287, no.1, pp.1-5, 2005 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 287 Issue: 1
  • Publication Date: 2005
  • Doi Number: 10.1016/j.jcis.2004.10.072
  • Journal Name: JOURNAL OF COLLOID AND INTERFACE SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1-5
  • Keywords: paraquat, adsorption, clay, organoclay, bentonite, sepiolite, BLEACHING EARTH, PARTICLE-SIZE, DIQUAT, MONTMORILLONITE, MECHANISMS, EXPOSURE, METHYL, WATER
  • Dokuz Eylül University Affiliated: Yes

Abstract

Clays were compared with organoclays for the sorption of paraquat front aqueous solution. Sepiolite (S), bentonite (B), and illite (1) were used as clay samples. Organoclays were prepared by the modification of the clays with nonyl- and dodecylammonium chlorides, denoted as NS, DS, NB, DB, NI, and DI, respectively. Specific surface area and pore size distribution of the samples were determined by N-2 adsorption-desorption at 77 K Using the BET method. X-ray powder diffraction analysis of the samples was used to determine the effects of modifying agents on the layer structure of the clays. In the adsorption experiments, C-m values increased from 0.038 mmol/g for DS to 0.223 mmol/g for NI. K-d0.3 values ranged from 0.177 for DS to 0.843 for NI. The adsorption data indicated that illite and NI are the most effective adsorbents among these clays and organoclay samples, respectively. (c) 2004 Elsevier Inc. All rights reserved.