The Conditions of Nonequilibrium Adsorption of Ions of Heavy Metals on Zeolites

Abstract

Optimal parameters of adsorption on model solutions Pb²⁺, Cu²⁺ and Zn²⁺ were defined separately for every ion of metal within the interval of concentrations 5–100 mg/dm³ depending on the pH of the solution using synthetic NaX and natural (Ai-Dag deposit, Azerbaijan) zeolites. It is established that for indicated heavy metals synthetic zeolite appeared to be more effective. The kinetic equilibrium of ionic exchange for industrial processes is achieved for less than 75 min. Diffusion parameters conspicuously affect both the adsorption process and the operation of adsorbers of large size with the fixed bed of the adsorbent. These data may be useful for designing the adsorbents.