Weproposeanewdefinitionof excessadsorption foruse inmolecularmodels of adsorption. Thisdefinition implies the calibration of theoreticalmodels inamannermimicking the experimental calibrationprocedure. The method of theoretical calibration is developed on the example of helium calibration. The notions of the He calibrated pore volume and the He calibrated pore size are introduced, and the He cal...

Mesoporous silica SBA-15 was modified in a three-step process to obtain a material with poly-N-isopropylacrylamide (PNIPAAM) grafted onto the inner pore surface. Water sorption calorimetry was implemented to characterize the materials obtained after each step regarding the porosity and surface properties. The modification process was carried out by (i) increasing the number of surface silanol g...

The ability of cynodon dactylon based thermally activated carbon to remove fluoride from aqueous solution has been investigated. The batch adsorption studies were carried out at neutral pH as the functions of contact time, adsorbent dose, adsorbate concentration, temperature and effect of co-anions, which are commonly present in water. The rate of adsorption was rapid during initial 105 minutes...

The term sorption is generally used to describe the initial penetration and the dispersal of the permeant molecules into food matrices (Chirife and Iglesias 1978) and, more generally, into all kinds of polymers (Naylor 1989; Tsujita 1992). This term includes adsorption, absorption into microvoids, and cluster formation. When a food matrix is placed in a humid atmosphere, the relationship betwee...

methyl orange is one dye resulted from the textile industry. the aim of this study is to test theadsorption capacity of nickel oxide nanoparticles for removing the methyl orange from aqueoussolution. the parameters studied were the effect of temperature, contact time and initial ph ofsolution. results indicate that the removal efficiency of nickel oxide nanoparticles increases withincreasing co...

moisture sorption isotherms are useful in food dehydration, storage and packaging. because of the complex food composition, experimental measurements are necessary for prediction of the isotherms. moisture sorption isotherms of thompson seedless raisins were determined at 30, 40, 50, 60, 70 and 80?c, using the standard static gravimetric method developed by the european cooperation project cost...

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