The purification of soil from oil contamination via natural sorbents

Abstract

The sorption properties of the natural materials considered wastes – cane and straw, cotton wastes, were studied in the research surveys carried out. The oil capacity of each sorbent was studied both in the static and dynamic conditions. The fact that the oil capacity of the cane and straw in dynamic conditions was 1.5 and 2.5 times lower than in the static ones, correspondingly testifies that the sorbent need some time for oil uptake. The optimum period for the sorption of the straw was 5 days, for the cane – 15 days, and for the halm – 10 days. It was established that regardless the large sorption surface, the straw and cane showed lower result than the halm in the extraction of oil from the soil. Thus, these sorbents poorly mixed (bring into contact) with the oil compared to the halm. The extraction coefficient of the oil for the cotton wastes (husk) comprises 60.17 %, for straw and cane almost same values – 32.08 % and 31.34 % correspondingly.