http://libir.tmu.edu.tw/bitstream/987654321/43034/1/4.pdf

Review of second-order models for adsorption systems.

Removal of heavy metal ions from wastewater by chemically modified plant wastes as adsorbents: A review

Adsorption of a few heavy metals on natural and modified kaolinite and montmorillonite: a review.

A kinetics and thermodynamics study of methylene blue adsorption on wheat shells

The biosorption process has been established as characteristics of dead biomasses of both cellulosic and microbial origin to bind metal ion pollutants from aqueous suspension. The high effectiveness of this process even at low metal concentration, similarity to ion exchange treatment process, but cheaper and greener alternative to conventional techniques have resulted in a mature biosorption technology. Yet its adoption to large scale industrial wastewaters treatment has still been a distant reality. The purpose of this review is to make in-depth analyses of the various aspects of the biosorption technology, staring from the various biosorbents used till date and the various factors affecting the process. The design of better biosorbents for improving their physico-chemical features as well as enhancing their biosorption characteristics has been discussed. Better economic value of the biosorption technology is related to the repeated reuse of the biosorbent with minimum loss of efficiency. In this context desorption of the metal pollutants as well as regeneration of the biosorbent has been discussed in detail. Various inhibitions including the multi mechanistic role of the biosorption technology has been identified which have played a contributory role to its non-commercialization.

/pdf/bioadsorbents-for-remediation-of-heavy-metals-current-status-281t0rob6y.pdf

Bioadsorbents for remediation of heavy metals: Current status and their future prospects

Removal of Cd(II) and Pb(II) ions, from aqueous solutions, by adsorption onto sawdust of Pinus sylvestris.

Effect of seeded surface area on crystal size distribution in glycine batch cooling crystallization: a seeding methodology

Study of Batch Crystallization and Determination of an Alternative Temperature-time Profile by On-line Turbidity Analysis : Application to Glycine Crystallization

1 Generalites    2 Methodes directes    2.1 Methodes directes a une variable (methodes dichotomique sequentielle,du nombre d'or, de Fibonacci)    2.2 Methode directe a variables multiples: methode SIMPLEX    2.3 Exemples d'application de la methode SIMPLEX    2.4 Principales caracteristiques de la methode SIMPLEX    2.5 Methodes derivees (methodes de Nelder et Mead, Multiple-Move ouMulti-Move, Super Modified SIMPLEX SMS, Weighted Centroid WCM,CMS)    2.6 Methode Uniplex    3 Methodes indirectes    3.1 Modeles empiriques    3.2 Necessite d'un plan d'experiences    3.3 Modele du premier degre    3.4 Methodes de calcul    3.5 Methode de plus grande pente    3.6 Modele du deuxieme degre    4 Conclusion    Bibliographie

Méthodes d''optimisation en chimie analytique

This article describes the continuous production of glycine by catalytic ammonolysis of monochloroacetic acid in an aqueous medium. The synthesis and crystallization of glycine are carried out in a battery of three stirred double-jacketed reactors while temperature and pH values are controlled. The results of the kinetic study allow one to calculate the residence time in each tank for a desired conversion ratio and are first checked with the setup. Then, some parameters (concentration of reagents, regulation of pH, residence time, catalyst) are modified to improve the final yield in crystallized glycine. The best yield resulting from a flow process (96.6%) is better than that resulting from a batch process (93%) and is obtained in the following conditions: the first step is performed at 75°C and pH 5.4 with a 10 mol L−1 monochloroacetic acid solution and a 17 mol L−1 ammonia aqueous one with a 0.2 molar ratio of hexamethylenetetramine; the second step is carried out at 75°C and pH 8.0; the optimal residence times are respectively 1 and 4 hours. Replacement of hexamethylenetetramine by formaldehyde can also be considered even if the yield is slightly lower. © 1999 John Wiley & Sons, Inc. Lab Robotics and Automation 11: 29–35, 1999

Alain Delacroix

Papers

Removal of Cd(II) and Pb(II) ions, from aqueous solutions, by adsorption onto sawdust of Pinus sylvestris.

Effect of seeded surface area on crystal size distribution in glycine batch cooling crystallization: a seeding methodology

Study of Batch Crystallization and Determination of an Alternative Temperature-time Profile by On-line Turbidity Analysis : Application to Glycine Crystallization

Méthodes d''optimisation en chimie analytique

Setup of glycine continuous synthesis by ammonolysis of monochloroacetic acid