ADSORPTION OF LANTHANUM IONS BY FINELY DISPERSED WAXES

Abstract

The kinetics of the adsorption of lanthanum ions superfine particles of peat and lignite waxes. It has been shown that the rate of adsorption on a peat wax (3,5 ÷ 1,9 mmol/(g∙min)) is higher than lignite (1,8 ÷ 1,3 mmol/(g∙min)). Found that the adsorption isotherms are complex S- shaped form. And the capacitance values of the monolayer adsorption equilibrium constant in the case of peat ( 255 mmol/g and 1224,5 l/mol, respectively), the wax is higher than in the case of brown coal (85,5 mmol/g and 296,0 l/mol, respectively). The main characteristics of the colloid-chemical suspensions waxes: the most probable radius of the particles (4-5 microns ), their zeta potential ( -50 mV in the case of peat wax – 5mV and – in the case of lignite wax) and the pH of the isoelectric state of the wax particles ( 5,5-5,7 ).

Keywords

• адсорбція, торф’яний і буровугільний воски, ємність моношару, електрокінетичний потенціал, ізоелектрична стан часток