ctab, coal, adsorption zeta potential

Simultaneous measurements of the cetyltrimethylamonium bromide (CTAB) adsorption and zeta potential determination of the (adsorption) suspensions were carried out. Three samples of oxidative altered bituminous coal (BO), bituminous coal (BC) and sub-bituminous coal (SB) were investigated. The adsorption isotherms were found to be of typical Langmuir type; values of the CTAB adsorption capacities have been calculated (am = 1.26 mmol/g for BO, 1.14 mmol/g for SB and 1.00 mmol/g for BC, respectively). Linear as well as nonlinear regression confirmed presumption of Langmuir model applicability. Shape of the adsorption isotherms was correlated with zeta potential values at the adsorption equilibrium. The results indicate that adsorption of CTAB on coals is going mainly through hydrophilic interactions between the surfactant molecules and the coal surface.

Simultaneous measurements of the cetyltrimethylamonium bromide (CTAB) adsorption and zeta potential determination of the (adsorption) suspensions were carried out. Three samples of oxidative altered bituminous coal (BO), bituminous coal (BC) and sub-bituminous coal (SB) were investigated. The adsorption isotherms were found to be of typical Langmuir type; values of the CTAB adsorption capacities have been calculated (am = 1.26 mmol/g for BO, 1.14 mmol/g for SB and 1.00 mmol/g for BC, respectively). Shape of the adsorption isotherms was correlated with zeta potential values at the adsorption equilibrium. The results indicate that adsorption of CTAB on coals is going mainly through hydrophilic interactions between the surfactant molecules and the coal surface.