Equilibrium and kinetic studies of the adsorption of sodium dodecyl sulfate from aqueous solution using bone char

Sorption of 17β-estradiol from aqueous solutions on to bone char derived from waste cattle bones: Kinetics and isotherms

“…There 19 are several natural and synthetic chemicals that interfere with the 20 endocrine system of humans and animals commonly known as the 21 endocrine disruptive chemicals (EDCs). These chemicals have an 22 antagonistic effect on the aquatic species and human beings. 23 Research shows that a variety of chemicals enter the environment 24 and the amounts are increasing day by day [1].…”

“…[7]. It has already proved its efficiency in removing 73 pyrogen such as endotoxin [13], air pollutant [14], bacterial spores 74 [15], heavy metals [16][17][18], dyes [19,20] and organic compounds 75 [21,22] was varied between 0.5 and 50 g L À1 . These affecting parameters 149 have been discussed in detail in the Results and discussion section.…”

Flotation using sodium dodecyl sulphate and sodium lauroyl isethionate for rapid dewatering of Mg(OH)2 radwaste suspensions

“…Surfactant adsorption was analysed using the Freundlich adsorption isotherm, which is commonly used to measure the adsorption of collectors onto the surface of particles. [47][48][49] The linear form is shown in eqn (1), where q e is the adsorption density of the collectors onto the Mg(OH) 2 surface, and in this study was calculated in units of both mg g À1 and mmol m À2 (by dividing through by the relative molecular mass of the collector (M r ) and the specic surface area (A s ) of the particles, with A s ¼ 8 m 2 g À1 ). 12 C e is the equilibrium concentration of collector in the aqueous medium, 1/ n is the Freundlich constant, and is related to the adsorption energy, while k d is the adsorption affinity and essentially relates to the adsorption limit at innitely small surfactant concentrations.…”

“…4 The adsorption of SDS and SLI surfactants onto particle surfaces were characterised using total organic carbon analysis and tted to heterogeneous Freundlich isotherms, as used in previous studies investigating the adsorption of surfactants onto mineral surfaces. 38,[47][48][49] The coagulation kinetics of sonicated Mg(OH) 2 suspensions were also investigated using static light scattering and compared to their surfactant driven aggregation with increasing SDS and SLI concentrations, to determine the collector's effect on particle size distributions. The foamability of particle stabilised suspensions was investigated using the well-established Bikerman column test, 33,41,50 to calculate the gas retention time and dynamic foamability indices (DFIs) of the particle-surfactant systems, in comparison to non-ionic methyl isobutyl carbinol (MIBC) frother.…”