Adsorption of CS2 vapors has been studied on different types of activated carbons obtained from different source raw materials. The activated carbons have different surface areas and are associated with varying amounts of the carbon-oxygen surface groups. The adsorption of CS2 vapors is not directly related to surface area, but is considerably influenced by the presence of carbonoxygen surface ...

cofe2o4 magnetic nanoparticles were modified by dopamine (da) and ascorbic acid (aa) as anchors. separation of the da and aa using cofe2o4 magnetic nanoparticles have been studied by investigating the effects of ph, concentration of the da and aa, amount of adsorbents, contact time, ionic strength and temperature. the mechanism of adsorption was also studied. the adsorption of da and aa to the ...

Powdered activated carbon (PAC) prepared from Eucalyptus camaldulensis Dehn. bark was tested for its adsorption capacity for Cu(II) and Pb(II). The experiment was conducted to investigate the effects of pH, contact time, initial metal concentration, and temperature. The best adsorption of both Cu(II) and Pb(II) occurred at pH 5, where the adsorption reached equilibrium within 45 min for the who...

Rhodamine B (Rh-B) is one of the most common pollutants in the effluents of textile industries effluents in developing countries. This study was carried out to evaluate the applicability of used black tea leaves (UBTL) for the adsorptive removal of Rh-B from aqueous system by investigating the adsorption kinetics in batch process. The effects of concentration and temperature on adsorption kinet...

The transition of primary alcohol molecules from bulk water to the surface is driven by entropy, increasing linearly with length hydrophobic tail. enthalpy adsorption nearly invariant molecule.

Statherin is a salivary protein that inhibits the nucleation and growth of hydroxyapatite crystals in the supersaturated environment of the oral cavity. The thermodynamics of adsorption of statherin onto hydroxyapatite crystals have been characterized here by isothermal titration calorimetry and equilibrium adsorption isotherm analysis. At 25 degrees C, statherin adsorption is characterized by ...

Activated carbon prepared from Euphorbia tirucalli L wood (ETAC) by chemical activation with phosphoric acid has been analysed for the removal of Reactive Red and Reactive Blue dyes from aqueous solutions through batch adsorption technique. Lower solution pH favours the adsorption of reactive dyes. The amount of dye adsorbed per unit mass of adsorbent increases with the increase in temperature ...

The typical result of gas phase chemical investigations on a one-atom-at-a-time level are standard adsorption enthalpies (∆Hads) of chemical species on stationary chromatographic surfaces. The standard adsorption enthalpies are deduced from experimental results using either the model of linear gas chromatography assuming mobile adsorption [1] or Monte-Carlo based models [2]. The obtained enthal...

The pore size and framework flexibility of hosts are of vital importance formolecular recognition and related applications, but accurate control of these parameters is very challenging. We use the slight difference of metal ion size to achieve continuous hundredth-nanometer pore-size adjustments and drastic flexibility modulations in an ultramicroporous metal–organic framework, giving controlla...

In this study, the sorption behavior of two important fission product radionuclides ((137)Cs and (140)Ba) onto sodium form of insolubilized humic acid (INaA) were investigated as a function of time, cation concentration and temperature, utilizing the radiotracer method. The sorption processes are well described by both Freundlich and Dubinin-Radushkevich type isotherms. Thermodynamic constants ...