Magnetic Oil Sorbents based on Technogenic and Natural Inorganic Materials

Abstract

The results of the study of the fractional composition, physicochemical and sorption characteristics of technological calcium carbonate and glauconite are presented. It is shown that the fraction of technological chalk with a particle size of more than 0.125 mm absorbs the greatest amount of oil and gasoline. The oil is better absorbed by the fraction of chalk with a particle size of 0.1–0.25 mm. For glauconite, oil sorption increases with decreasing particle size. The complete absorption of oil on the solid surface by the glauconite sorbent occurred within 2 min and about 10 min by the carbonate sorbent; the recovery rates were 99% and 90%, respectively. The best results in terms of the degree of water purification from oil were shown by a carbonate sorbent with a particle size of more than 0.125 mm – 83 % and glauconite with a particle size of 0.045–0.1 mm – 90% with an oil film thickness of 0.5 mm. The degree of water purification from oil was 80 % for the carbonate sorbent and 93 % for the glauconite one with an oil film thickness of 0.5 mm. With an increase in the thickness of the oil and oil films, the degree of water purification decreases.