New Factorial Designs to Evaluate Chemisorption of Divalent Metals on Aminated Silicas

RETRACTED: Immobilization of 5-amino-1,3,4-thiadiazole-thiol onto kanemite for thorium(IV) removal: Thermodynamics and equilibrium study

“…The adsorption experiments were performed through the batchwise method by suspending a series of 20 mg samples of the solid, in 20.0 cm 3 aqueous solutions of cations at concentrations varying from 1.25 to 2.5 Â 10 À2 mmol dm À3 , under orbital stirring for 24 h at 298 ± 1 K. From profiles of the obtained adsorption isotherms represented by the number of moles adsorbed (N f ) [18][19][20], versus the number of moles at equilibrium per volume of solution (C S ), for a series of isotherms, the data reveal that the adsorption process conforms to the Sips model. Sips combined the Langmuir and Freundlich equations (Eq.…”

Interaction of Indigo Carmine Dye with Chitosan Evaluated by Adsorption and Thermochemical Data

“…The suspensions were agitated in an orbital bath for 2 h, sufficient time to attain equilibrium. The dye-adsorbed quantity was determined spectrophotometrically at 555 nm and calculated using the expression (12,(20)(21)(22)(23)(24) …”

Synthesis, characterization, and sorption properties of silica gel-immobilized Schiff base derivative

“…The silica surface consists of two types of functional groups, siloxane (Si-O-Si) and silanol (Si-OH) [7][8][9], which provide functionalization with different functional groups. Thus, silica modification can occur via the reaction of particular molecules with either the siloxane or the silanol [10]. Among the different adsorbents, silica gel immobilized with various organic compounds with metal chelating ability has especially received great attention [11][12][13].…”