Adsorption des anions phosphate par des composés ferriques en vue du traitement des eaux usées : approche en réacteur homogène et en mode hydrodynamique contrôlé

Abstract : The Ph.D. work, presented in this manuscript, is devoted to evaluating phosphate adsorption process on carbonate ferric green rust and ferrihydrite. The main objective concerns an application for the treatment of waste water in rural areas. Both iron oxides are first synthesized and their physico-chemical properties characterized. The ferric green rust structural properties differences as a function of synthesis parameters such as aging period and addition of hydrogen peroxide solution is of particular interest. A detailed study of surface physico-chemical properties by X Photoelectron Spectroscopy is carried out in the case of ferrihydrite. The reactivity of these two iron oxides is then evaluated in batch experiments. Adsorption process follows the pseudo-second order kinetic equation and Freundlich isotherm model which give the best adjustments of experimental data. The influence of various parameters such as pH, ionic strength, etc on phosphate adsorption is also taken into account. Column experiments are afterwards carried out by using filtration material constituted of iron oxide deposited onto pozzolana. The optimal conditions to prepare this filtration material are naturally predetermined. Phosphate adsorption in hydrodynamic mode is characterized by advective and diffusive mechanisms and water regionalization which govern the adsorption process in the column. Moreover, phosphate adsorption capacity and flow rate influence on adsorption process are obtained. Finally, a preliminary experiment on a pre-treated waste water finally shows that the filtration material is potentially interesting for an industrial application
Document type :
Theses
File URL :
http://docnum.univ-lorraine.fr/prive/DDOC_T_2012_0237_BARTHELEMY.pdf
Complete list of metadatas

https://hal.univ-lorraine.fr/tel-01749629
Contributor : Thèses Ul <>
Submitted on : Thursday, March 29, 2018 - 12:21:39 PM
Last modification on : Thursday, May 24, 2018 - 10:32:01 AM

Identifiers

  • HAL Id : tel-01749629, version 1

Citation

Kévin Barthélémy. Adsorption des anions phosphate par des composés ferriques en vue du traitement des eaux usées : approche en réacteur homogène et en mode hydrodynamique contrôlé. Autre. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0237⟩. ⟨tel-01749629⟩

Share

Metrics

Record views

11