Thermodynamic and transport properties of sodium dodecylbenzenesulphonate (SDBS) in aqueous medium over the temperature range 298.15Â K to 333.15Â K

Measurements of density and dynamic viscosity of binary mixtures of water + sodium dodecylbenzenesulphonate (SDBS) solutions have been carried out over the entire concentration regime in the temperature range (298.15 K to 333.15 K) at 5 K intervals. The densities were measured by using a Mettler Toledo, DE45 delta range density meter, based on electromagnetically induced oscillations of a U-shaped glass tube. An automated Anton Paar microviscometer was used for the measurement of dynamic viscosities. Both the instruments have an automatic temperature control system maintained by Peltier effect. Temperature dependent densities were satisfactorily correlated with a second order quadratic polynomial equation and dynamic viscosities were correlated with Arrhenius equation. Various useful thermodynamic parameters viz. thermal expansion coefficient and apparent molar volume have been calculated from density data. The results are critically discussed in terms of interactions. The work mainly focuses on environmental consideration and significance of thermodynamic and transport properties data of ubiquitous environmental pollutant (SDBS) and their utilisation in the improvement of design and calculation methods for its treatment and separation processes to minimize its toxicity and environmental hazards.