I V S, A E N, M M K, Yu.L S. Efficient carbonaceous sorbent based on the waste sludge of oil extraction industry for purifying wastewater from petroleum products. IJET [Internet]. 2018 Apr. 20 [cited 2024 Apr. 29];7(2.23):266-9. Available from: https://www.sciencepubco.com/index.php/ijet/article/view/11928