Equilibrium, kinetic and thermodynamics studies for adsorption of tartaric acid by calcium peroxide nanoparticles

Tartaric acid is an essential organic acid utilized in the food, pharmaceutical, and chemical industries. So, the recovery and separation of tartaric acid are requisite. In this research, calcium peroxide nanoparticles (CPNs) have been synthesized, characterized and evaluated for tartaric acid adsorption. For this purpose, synthesized CPNs have been characterized by different analyses that are scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer Emmett Teller (BET) surface area, and Fourier transform infrared (FTIR) spectroscopy. The characterization results have been confirmed the structure of CPNs. The average particle and surface area of CPNs have been found as 34.77 nm and 13.58 m(2)/g. The impacts of adsorption parameters that are inceptive tartaric acid concentration, equilibrium contact time, adsorbent dosage, and temperature have been also surveyed. Furthermore, isotherm, thermodynamics, and kinetic modelling of adsorption were actualized to clarify the mechanism of tartaric acid adsorption by CPNs. Due to having highest R-2 values, Langmuir isotherm model (0.9918) and pseudo-second order kinetic model (0.9999) were found to be the most available models for expressing the mechanism of tartaric acid adsorption by CPNs. Thermodynamic parameters which are entropy (Delta S-0), and enthalpy (Delta H-0) have been determined as 0.553 J/mol.K and -3041.5 J/mol, respectively (with R-2 value of 0.9637). The ultimate adsorption capacity of CPNs for tartaric acid removal was attained as 352.57 +/- 1.96 mg/g.

Automated summary

Calcium peroxide nanoparticles (CPNs) were synthesized and used for the adsorption of tartaric acid. The CPNs were characterized and their structure confirmed. The impacts of different adsorption parameters were investigated, and isotherm, thermodynamics, and kinetic models were employed to explain the adsorption mechanism. The ultimate adsorption capacity of CPNs for tartaric acid removal was determined as 352.57 mg/g.