External Diffusion Area of Heavy Metals Adsorption From Wastewater

Sorption processes when using solid sorbents are widely used in chemical and food technologies and for environmental protection. Sorption is one of the most effective methods of industrial water purification, containing various impurities, and allows fine purification under the MaC norms. Very important, from a practical point of view, during the industrial wastewater adsorption purification is a kinetic process or adsorption rate. according to kinetic mass transfer processes, both outside diffusion and pore diffusion regions are subject to determining. In the paper, the outside diffusion region is considered. Based on experimental studies: kinetics of adsorption process of copper solution in stirrer was studied; kinetic curve of copper adsorption by clinoptilolite was obtained; mass transfer coefficients for outside diffusion region of the given process were calculated; obtained coefficient values were made according to zeolite grains size; it was found that experimental and theoretical values are the best correlated to zeolite particles with larger grains diameters. Thus, the obtained results allow asserting the efficient use of Sokirnitsa clinoptilolite for water purification from Cu2+ ions