Medium material for removing phenol contamination from groundwater, method of producing the same, and use of the same

A method of producing a medium material for removing phenol contamination from groundwater, comprising:

• (a) weighing an amount of organic bentonite and an amount of cupric nitrate at a mass ratio of 1:0.25, respectively, formulating a cupric nitrate solution, adding said amount of organic bentonite to said cupric nitrate solution, withdrawing said amount of organic bentonite and placing it into a heating equipment to increase the temperature to 250-300° C. at 10° C/min, and roasting for 30-45 min to obtain a modified bentonite;
• (b) culturing phenol-degrading bacteria extracted from a manganese sand filter material in a tryptic soy broth (TSB) medium with a concentration of 1±0.4% under ambient conditions of pH=6.0-7.3, 25° C., and a dissolved oxygen concentration of 8.15-8.40 mg/L for 10-24h to form an active bacterial agent;
• (c) adjusting an OD600 value of said active bacterial agent to near 1.0, inoculating to 100 mL of an MSVP medium containing 0.20-0.45 g/L of SiO2 powder, and adding to 100 mL of a sodium alginate solution with a mass concentration of 0.5 g/L at a volume ratio of 10-20% after 15-24 h of adsorption to obtain a bacteria-entrapping solution;
• and
• (d) adding said bacteria-entrapping solution, said manganese sand filter material, said modified bentonite, and an amount of biochar at a mass ratio of 1:(0.2-0.4):(0.2-0.4):(0.1-0.2) to a CaC12 crosslinking solution to form agglomerates or spheres through crosslinking and coagulation, which are washed with sterile water to obtain immobilized granules or prills.