عنوان مقاله [English]
In addition to being a major environmental hazard, hydrocarbon Contamination, in contaminated sandy soils, reduce its resistance parameters and are released as an environmental and engineering hazard to nature. There are many ways to refine and improve such soils. In the present study, improvement of soils contaminated by two types of hydrocarbons (motor oil and gasoline) was performed using the Sporsarcina pasteuri strain bio-based injection method and then calcium carbonate sequestration in a tank based on the gravity penetration of microbial improvers. Effects of Hydrocarbon ,Density and Inhibitory Effects on Exposure to Microorganisms (Using Disk Inhibitory Test Results) are among the factors that influence the rate and mode of recovery and improvement with any degree of success in hydrocarbon contaminated soils. Thus, the results of the improvement process were investigated after injection and, obviously, due to the high inhibitory of the motor oil to the gasoline , the improvement process in this pollutant was less than that of the gasoline. Most bio-improvement also occurred in non-polluted soil.