Arsenic coagulation/flocculation with iron (iii) hydroxide: Adsorption mechanisms and stability constants of surface complexes

  • strict warning: Non-static method view::load() should not be called statically in /home4/vibu/public_html/journalijdr.com/sites/all/modules/views/views.module on line 906.
  • strict warning: Declaration of views_handler_argument::init() should be compatible with views_handler::init(&$view, $options) in /home4/vibu/public_html/journalijdr.com/sites/all/modules/views/handlers/views_handler_argument.inc on line 744.
  • strict warning: Declaration of views_handler_filter::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /home4/vibu/public_html/journalijdr.com/sites/all/modules/views/handlers/views_handler_filter.inc on line 607.
  • strict warning: Declaration of views_handler_filter::options_submit() should be compatible with views_handler::options_submit($form, &$form_state) in /home4/vibu/public_html/journalijdr.com/sites/all/modules/views/handlers/views_handler_filter.inc on line 607.
  • strict warning: Declaration of views_handler_filter_boolean_operator::value_validate() should be compatible with views_handler_filter::value_validate($form, &$form_state) in /home4/vibu/public_html/journalijdr.com/sites/all/modules/views/handlers/views_handler_filter_boolean_operator.inc on line 159.
  • strict warning: Non-static method view::load() should not be called statically in /home4/vibu/public_html/journalijdr.com/sites/all/modules/views/views.module on line 906.
  • strict warning: Non-static method view::load() should not be called statically in /home4/vibu/public_html/journalijdr.com/sites/all/modules/views/views.module on line 906.
Author: 
Elyahyaoui, A., Razzouki, B., El Hajjaji, S. and Bouhlassa, S.
Abstract: 

The adsorption of arsenic (V) on iron (III) hydroxide had investigated in function of sorbent amount, pH, and contact time. The surface complexation method is used to establish the interaction mechanisms. H3O+/OH-stoichiometry is evaluated and varied between -2 and 2, in pH range of 3 to 12. This suggests that As (V) adsorbs in this conditions, via six predominant adsorption reactions. Stability constants of predominant species which are protonated and unprotonated, are obtained. The contribution of electrostatic effect to arsenic (V) uptake by Fe-hydroxide is evaluated. Obtained results show that adsorption is of electrostatic nature for pH ≤ 6, and of chemical character at pH ≥ 7. While the kinetics adsorption data suggest a complex changing of predominant adsorption reaction with time, involving the intrinsic (n= 0), and 1 or 2 H+ or OH- exchange reactions.

TOC

Download PDF: 

CHIEF EDITOR

  

           Prof. Dr. Bilal BİLGİN

Call for Papers - 2017

    submit your paper now

   Vol. 07, Issue 03, March 2017

CURRENT ISSUE

 

Article Tracking

IMPACT FACTOR 2016

          4.753

Get your Certificate

Copyright © 2016 International Journal Development Research. All Rights Reserved.