Evaluation of the efficiency of raw bagasse and biochar adsorbents in removing heavy metals from drilling mud wastes of Mishan Formation

Oil-well drilling operations lead to the dissemination of heavy metals into the environment with numerous adverse effects on various components of the environment and living beings. The purpose of this study is to investigate the efficiency of raw bagasse and biochar adsorbents in removing heavy metals from drilling mud wastes of the Mishan Formation. For this purpose, the drilling mud waste of Mishan Formation was submitted to chemical digestion, followed by blending with raw bagasse and biochar adsorbents according to the experimental design. The percentage removal of barium, nickel, vanadium, and cadmium was calculated and statistical analysis, analysis of variance, and comparison of means were performed using the Duncan test at the 5% level. The results of analysis of variance of the parameters influencing the removal percentage showed that contact time had the greatest contribution to the removal efficiency of vanadium and cadmium. The amount and type of absorbent were also recognized as the most effective parameters in the removal of barium and nickel, respectively. Based on the results of contact time, the maximum percentage removal was observed at 60 min for nickel and cadmium, at 120 min for barium and vanadium. According to the maximum removal percentage of nickel, cadmium, vanadium and barium (98.37%, 96.53%, 96.93% and 87.98%, respectively), the use of crude bagasse and biochar adsorbents in the metal removal process Heavy can be used as an effective technique to reduce the risks of these pollutants and preserve the animal, plant and ... environment. In Khuzestan province, due to the existence of extensive sugarcane fields, large quantities of bagasse are produced annually, which are either burned or stored without use. On the other hand, the presence of oil tanks causes the production of drilling wastes and heavy metals in high volumes. It follows bio-animals and living organisms, so the removal of heavy metals from the drilling residues of oil wells using raw sugarcane bagasse can be considered as a management and environmentally friendly solution.