Effect of Critical Micelle Concentration of Sodium Dodecyl Sulfate Dissolved in Calcium and Carbonate Source Solutions on Characteristics of Calcium Carbonate Crystals

Abstract

Various concentrations of anionic surfactant, sodium dodecyl sulfate (SDS), were used to control the growth of calcium carbonate crystals. The obtained calcium carbonate particles were characterized by Fourier transform infrared spectrometry (FT-IR), X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), laser scattering particle size analyzer and zeta potential analyzer techniques. The effect of various concentrations including critical micelle concentration (CMC) in calcium and carbonate source solutions on the polymorph, morphology, particle size distribution and zeta potential of the particles were studied. It was demonstrated that varied SDS concentrations in carbonate source solution has obvious effect on the characteristics of calcium carbonate particles, while varied SDS concentration in calcium source solution does not affect the characteristics. Also, it was observed that SDS affected orientation development of calcium carbonate crystals.

Effects of sodium laurylsulfate on crystal structure of calcite formed from mixed solutions

“…The range of selected CMC values was wide enough to demonstrate the effect of SLS on crystallization. It has been reported that rapid crystallization does not allow for full execution of SLS [19]. However, the crystallization of CaCO 3 in this study is expected to be fully influenced by SLS because bicarbonate ions require extra time to be oxidized to carbonate ions before the commencement of crystallization.…”

“…The precipitation of calcium carbonate was a tedious time consuming process, which compares to previously reported experiments [19]. It is likely that the bicarbonate ion necessitates an additional oxidation step to form the carbonate ion, thus requiring longer crystallization times to produce calcite.…”

“…Longer crystallization times and vigorous stirring were necessary for calcite precipitation. However, under these conditions, precipitates did not appear as rapidly when sodium carbonate was employed [19].…”

Synthesis, characterization and adsorption properties of alginate porous beads

“…In the presence of 10 wt % CaCl 2 , the SDS self-assembles and forms lamellar micelles [32], surface being more compact, as can be observed from SEM image of the CaAlg10 bead (Fig. 3d).…”

CO2 Mineralization Using Brine Discharged from a Seawater Desalination Plant

“…CO3 2− ions in dolomite also absorbed IR near this position, at 853 cm −1 . Meanwhile, the peak at 877 cm −1 indicates the presence of CaCO3 [35,36,[38][39][40]. Although we expected that the third and fourth cycles would produce Mg carbonates that excluded Ca, some of the Ca remaining in the suspension after the second cycle managed to participate in the carbonation of Mg.…”