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The thermodynamic parameters (▵ G°, ▵H° and ▵S°) for adsorption of acrylic acid on CaO2 nanoparticle were estimated in the temperature range of 300.15 - 313.15 K, which helps to evaluate the feasibility of adsorption process, nature of adsorption process and affinity of adsorbent toward solute molecule. A dynamic adsorption study in a fixed-bed column was performed using CaO2 nanoparticle for the recovery of acrylic acid from aqueous stream. The breakthrough curves of adsorption system were obtained for different process variables, such as initial acrylic acid concentration (2882-7206 mg L-1), flow rate (5-9 mL min-1) and bed height (10-20 cm). The bed-depth service time model, Thomas model, Yoon-Nelson model and deactivation kinetic model were applied to the experimental data to predict the column performance. The data were in good agreement with the deactivation kinetic model. The presented results may be useful for the design of adsorption system using nanoparticles, which can be further extended to other systems. [ABSTRACT FROM AUTHOR]

The article analyzes the adverse effects of lead (Pb) and protective effect of zinc (Zn) on lymphocyte proliferation and superoxide dismutase (SOD) express in 18 crossbred male goat kids. Results showed no effect of dietary treatments on feed intake of the animals. It notes that overall average lymphocyte proliferation response at the end of 90 days duration was lower in Pb supplemented group compared to other groups. It cites the effect of Zn supplementation on the decrease in SOD expression.