JSC Research Center “Uralelektromed”, Verkhnyaya Pyshma, Russia:

A. V. Sviridov, Assistant Professor
E. V. Ganebnykh, Post-Graduate Student
G. I. Maltsev, Chief Specialist, e-mail: mgi@elem.ru
K. L. Timofeev, Chief Hydrometallurgist

One of the possible ways to increase the efficiency of waste w ater treatment technologies is the use of new highly disperse sorbents acting as sorbentscoprecipitators of toxic components, which basis are natural silica-alumina, which surface is modified by inorganic and organic substances (in particular, montmorillonite MMT). During the sorbent synthesis, their sorption, electric-surface, hydrophilic-oleophilic and rheological properties were adjusted by varying the nature and concentration of the modifiers, such as: soda ash; sodium aluminate; sodium ferrate; polyphosphates; organic compounds, containing carboxyl and ether groups. The reagent “Ecosol-401” (“Экозоль-401”) was obtained on MMT basis, containing carboxyl groups. During metal extraction from solutions of JSC "Uralelektromed", the best results were reached with a dosage of 65 mg/dm³ of reagent “Ecosol-401”, together with 0.2 mg/dm³ of flocculant “Praestol 650 TR” (“Праестол 650 ТР”) by the technology of contact lightening of treated water carried on loading from quartz sand (loading height is 210 mm, equivalent diameter of silica sand grains is 1.5–2.0 mm, column diameter is 30 mm) at filtration rate of 2.5 dm³/hour. Residual concentrations of metal impurities meet the environmental discharge standards.

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