Abstract
The properties of electrical discharge aluminium hydroxide and iron hydroxide have been investigat- ed. On the basic of sedimentation technique the particle size of these materials has been accounted. It was shown that the parameter dependent on obtaining of the coagulants. So the presence of copper, chromium and zinc salts in water solution is result to increasing of the radii particles of the materials. Apart from this sedimentation behavior of coagulants are also changed. Obtaining facts are needed to take into account on processes of purification of galvanic pollution by electrical discharge coagulant method.