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Dive into the research topics where Boualem Hamdi is active.

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Featured researches published by Boualem Hamdi.


Journal of Colloid and Interface Science | 2008

Influence of specific surface area of pyrogenic silicas on their heat of immersion in water and on their surface properties assessed using inverse gas chromatography.

Jean-Baptiste Donnet; Henri Balard; Nabila Nedjari; Boualem Hamdi; Herbert Barthel; Torsten Gottschalk-Gaudig

The heat of immersion and the surface properties of pyrogenic silicas were examined using microcalorimetry and inverse gas chromatography at finite concentration (FC-IGC). The microcalorimetric measurements showed a regular decrease of the heat of immersion, in water, per area unit with an increase in the surface areas. The desorption isotherms were established using FC-IGC. It is observed that BET constant value goes through a minimum, whereas the shapes of distribution function of the adsorption energies of isopropanol are changing. All results could be interpreted using a model of formation of the pyrogenic silica in the flame, which explains the change of surface functionality and geometry occurring around 200 m2/g.


Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2011

Effect of acid treatment on surface properties evolution of attapulgite clay: An application of inverse gas chromatography

Lilya Boudriche; Rachel Calvet; Boualem Hamdi; Henri Balard


Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2012

Surface properties evolution of attapulgite by IGC analysis as a function of thermal treatment

Lilya Boudriche; Rachel Calvet; Boualem Hamdi; Henri Balard


Powder Technology | 2014

Influence of different dry milling processes on the properties of an attapulgite clay, contribution of inverse gas chromatography

L. Boudriche; Alain Chamayou; Rachel Calvet; Boualem Hamdi; H. Balard


Chemical Engineering Journal | 2014

Static Sorption of Phenol and 4-Nitrophenol onto Composite Geomaterials based on Montmorillonite, Activated Carbon and Cement

Mohamed Houari; Boualem Hamdi; Omar Bouras; Jean-Claude Bollinger; Michel Baudu


Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2008

Silane modified fumed silicas and their behaviours in water: Influence of grafting ratio and temperature

Hassan Ridaoui; Jean-Baptiste Donnet; Henri Balard; Hacina Kellou; Boualem Hamdi; Herbert Barthel; T. Gottschalk-Gaudig; Andre-Pierre Legrand


Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2008

Surface properties of dimethylsilylated silicas, assessed using IGC at finite concentration

H. Kellou; Boualem Hamdi; E. Brendlé; Torsten Gottschalk-Gaudig; Herbert Barthel; Hassan Ridaoui; Henri Balard; Jean-Baptiste Donnet


Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2016

Ageing process of some pyrogenic silica samples exposed to controlled relative humidities: Part I: Kinetic of water sorption and evolution of the surface silanol density

Boualem Hamdi; T. Gottschalk-Gaudig; Henri Balard; E. Brendlé; N. Nedjari; Jean-Baptiste Donnet


Powder Technology | 2016

Physicochemical characterization of a diatomaceous upon an acid treatment: a focus on surface properties by inverse gas chromatography

Tassadit Benkacem; Boualem Hamdi; Alain Chamayou; Henri Balard; Rachel Calvet


Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2016

Surface characterization of reservoir rocks by inverse gas chromatography: Effect of a surfactant

K. Bendada; Boualem Hamdi; Lilya Boudriche; Henri Balard; Rachel Calvet

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Henri Balard

École Normale Supérieure

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Hassan Ridaoui

École Normale Supérieure

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H. Balard

Centre national de la recherche scientifique

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