▎ 摘　　要

NOVELTY - Preparing waste water processing adsorbent comprises e.g. mixing 1-3 pts. wt. magnetic graphene, 1-2 pts. wt. corn straw biochar, 2-5 pts. wt. corncob, 2-5 pts. wt. tea tree root powder with 1-2 pts. wt. bentonite, drying in an oven at 70-80 degrees C, grinding in grinding machine and sieving through a 120 mesh to remove large particles grain, adding 2-4 pts. wt. acetic acid and 20-40 pts. wt. deionized water, stirring under water bath, filtering, washing with distilled water, drying in oven at, grinding in grinding machine and then sieving through a 200 mesh sieve to remove large particles. USE - The method is useful for preparing waste water processing adsorbent. ADVANTAGE - The adsorbent has high removal rate of chemical oxygen demand, cupric cation and lead ion, excellent treating effect on wastewater containing heavy metal ions and decolorization effect. DETAILED DESCRIPTION - Preparing waste water processing adsorbent comprises (i) mixing 1-3 pts. wt. magnetic graphene, 1-2 pts. wt. corn straw biochar, 2-5 pts. wt. corncob, 2-5 pts. wt. tea tree root powder with 1-2 pts. wt. bentonite, drying in an oven at 70-80 degrees C, grinding in grinding machine at 300-400 revolution per minute for 3-5 hours and sieving through a 120 mesh to remove large particles grain, (ii) adding 2-4 pts. wt. acetic acid and 20-40 pts. wt. deionized water, stirring at 60-65 degrees C for 18-20 hours under water bath, (iii) filtering, washing with distilled water, drying in oven at 70-75 degrees C for 22-24 hours, grinding in grinding machine at 350-400 revolution per minute for 3-5 hours and sieving through a 200 mesh sieve to remove large particles, (iv) adding 2-5 pts. wt. starch xanthate, 1-2 pts. wt. bovine serum albumin, 1-2 pts. wt. sodium alginate, 1-2 pts. wt. polyvinylpyrrolidone and 30-50 pts. wt. deionized water and stirring to obtain ball, (v) drying balls obtained in step (iv), soaking in a solution of 1.5-2 pts. wt. boric acid and 10-20 pts. wt. deionized water for 34-36 hours, and (vi) immersing balls in a solution of 3-5 pts. wt. sodium borohydride and 20-40 pts. wt. absolute ethanol solution for 30-50 minutes.