Fine particles Silicoaluminophosphate-34 were synthesized by hydrothermal sol-gel method. The effect of crystallization time, as one of the important synthesis factors on particle size and crystallinity, kinetic and equilibrium adsorption, and selectivity of CO2 / CH4 has been studied in this work. The adsorption isotherms are obtained at mod...

Hydroxyapatite nanocrystals were synthesized by sol-gel combustion method for the sorption ofHg(II) ions from aqueous solutions. The effects of varying parameters such as pH, temperature, initialmetal concentration, and contact time on the adsorption process were examined. Adsorptionequilibrium was established in 360 minutes and the maximum adsorption of Hg(II) on thehydroxyapatite was observed...

the molecular sieves are selective adsorbents. they can adsorb some kind of molecules that are different in size or shape from the others. in separation of n-paraffins from iso-paraffins and aromatics, sa molecular sieve is the suitable adsorbent, and can adsorb n-paraffins to separate them from other hydrocarbons. in this paper equilibrium isotherms of n-cs, n-c6 and n-c7 from an inert solvent...

In the present study seven synthetic polymers were used as adsorbents for the removal of Cd(II) from aqueous solution. The equilibrium studies were systematically carried out in a batch process, covering various process parameters that include agitation time, adsorbent dosage, and pH of the aqueous solution. The analyzing system was an atomic absorption spectrometer (Perkin-Analyst 100). It was...

The design of molecularly imprinted polymers (MIPs) for the specific binding hydrophobic molecules (mitotane) was investigated by considering monomers and cross-linking agents with variable character, methyl methacrylate, butyl methacrylate lauryl as functional monomers, ethylene glycol dimethacrylate 1,6-hexanediol agents. MIPs were bound to a porous silica support means radical transfer react...

In this work, a new experimental protocol was designed to measure sorption of ternary gas mixtures in polymer membranes for the first time. We measured isotherms binary and C2H6, CO2, CH4 PIM-1, using pressure decay apparatus, working at constant composition variable phase. The results show competitive effects all analyzed, affecting each species proportion total sorbed concentration other comp...

The utility of H NMR spectroscopy of headgroup deuterated amphiphiles as a tool for measuring charge density at the surface of lipid bilayer membranes and polymer colloids is described. Attention is given to current ideas regarding the physical origin of the spectral changes observed in the presence of surface charges, and to several novel applications of the technique including determination o...

In this review we discuss the fundamental role of surface forces, with a particular emphasis on the effect of the disjoining pressure, in establishing the wetting regime in the three phase systems with both plane and curved geometry. The special attention is given to the conditions of the formation of wetting/adsorption liquid films on the surface of poorly wetted substrate and the possibility ...