Influence of Activation Method of Sorbents on Their Properties
The contribution describes chemical, physical and mineralogical properties of so-called Albanian (ore origin) leaching residuum from dumping ground of former Sered’ Nickel Works (West Slovakia). The main mineral component of this residuum represents synthetic magnetite, which is known by its ability to sorb some substances. The changes in grain size and specific surface were studied as a function of grinding time and mill. The activation in ball mill during 25 min resulted in a two-fold increase in specific surface. Contrary to this fact, grinding in attritor led to a three-fold increase in specific surface already after 15 min, i.e. from 1.31 to 3.86 m<sup>2</sup>/cm<sup>3</sup>. For adsorption tests and following magnetic filtration the leaching residuum ground in the solution of K<sub>4</sub>Fe(CN)<sub>6</sub> was applied. Obtained results point to the fact, that magnetic sorbent prepared in such a way and magnetic filtration enable substantial reduction of ion concentration of heavy metals such as copper, manganese and zinc.