Bioremediation of oil sludge contaminated soil by landfarming with added cotton stalks

A field bioremediation of oil sludge contaminated soil was conducted by landfarming treatment with added cotton stalks in the Shengli oil field. The ability of landfarming treatment was evaluated to reduce petroleum hydrocarbons and restore soil quality. For 39-month landfarming, the initial concentration of total petroleum hydrocarbons (TPH) was 12.57 mg g−1 for oil sludge contaminated soil. The removal efficiency of TPH, saturated fraction and...