Odstranění xenobiotik z vod pomocí adsorpce na aktivní uhlí

Abstract

In this thesis was studied the removal of the pesticide glyphosate, the main component of the commercial product Roundup, by adsorption on activated carbon prepared by chemical activation of a biochar prepared from cocoa husks. The samples were characterized by SEM, point of zero, nitrogen physisorption and FTIR. On a selected sample – biochar activated by ZnCl2 at 600˚C – were perfomed kinetic experiments, equilibrium experiments (adsorption isotherms), thermodynamics and the effect of pH. Experiments showed that the kinetics were best fitted with by pseudo-first order, sorption was endothermic, the best fitting model was Langmiur isoterm. From point of zero we have determind, when the sorbent and adsorbate will be positively charged and when negatively and at which pH is the sorption most effective.