Sorption of petroleum products by modified samples of water treatment waste

The possibility of utilizing native waste from drinking water treatment as an absorbent material for petroleum products (motor oil grade 5W-40, diesel fuel, gasoline grade A-92) has been investigated. The mineralogical composition of the water treatment waste has been determined, according to the results, it primarily consists of quartz, calcite, sepiolite, anorthite, and gallwazite. Values of the maximum absorption capacity for the investigated petroleum products and the maximum water absorption have been established. To reduce water absorption properties, the native material have been modified by thermal treatment at a temperature of 550 °C, treatment with 5 % solutions of sulfuric acid and sodium hydroxide, as well as a 5 % solution of silicone fluid of the «Ecodom Bio» brand. Values of the maximum absorption capacity of the modified water treatment waste for petroleum products and water under static and dynamic conditions also have been determined. It has been revealed that thermal treatment contributes to achieving maximum absorption capacity values for both petroleum products and water absorption. It has been established that the minimal water absorption is observed in the sample of the investigated material treated with a siliconorganic fluid solution. Purification of liquids containing hydrocarbons at a concentration of 2 mg/dm3 in dynamic conditions has been carried out. Overall, it has been determined that the maximum solution purification is observed for motor oil, and the minimal one – for gasoline grade A-92.