Carbon Sorbents of Oil and Oil Products Based on Secondary Cellulose-Containing Feedstock of Buckwheat Production

Abstract

The possibility of applying the secondary cellulose-containing feedstock resource of buckwheat production, notably its husk, as sorbents for collection of oil and oil products is shown. In order to increase the ready product yield, develop the porosity, and improve sorption characteristics of buckwheat husk, the methods for its physical and chemical modification are proposed. The influence of modification regimes on parameters of the porous structure and sorption ability of developed materials in regards to various types of oil products is investigated. It is established when studying the possibility of using the prepared material to collect oil products from the water surface that the sorption ability increases from 4.0 to 6.3 g/g in regards to oil and from 3.8 to 5.2 g/g in regards to used engine oil as the thickness of the oil product layer increases from 1 to 15 mm. The developed sorbent saturated with oil or used engine oil retains the floatability for more than 20 days. The application of the buckwheat husk as a sorbent makes it possible not only to liquidate contaminations both on the water and soil surface but to solve the utilization problems of agricultural production waste as well.