Basic dye removal from aqueous solutions by dodecylsulfate- and dodecyl benzene sulfonate-intercalated hydrotalcite.

摘要: Dodecylsulfate- and dodecyl benzene sulfonate-hydrotalcites were prepared by calcination-rehydratation method. The surfactants intercalation in the interlayer space of hydrotalcite checked PXRD FTIR spectroscopy where resulting materials found to be similar those reported literature used remove a basic dye (safranine) from aqueous solutions. sorption kinetics data fitted pseudo second order model. isotherms established parameters calculated. Langmuir model with good values determination coefficient. thermodynamic calculated Van't Hoff plots gave low value Delta G degrees (<-20 kJ mol(-1)) indicating spontaneous physisorption process. Two regeneration cycles processed acetone extraction leading same removal capacity obtained as original surfactant-intercalated hydrotalcites. UV-vis spectra recovered extracts spectrum safranine, which means that was without any modification.