The different parameters of banana peel adsorbent that affected on adsorption capacity was studied in this article,meanwhile the adsorption characteristic and mechanism was discussed.Under the condition of pH 2.0,the initial concentration of Cr6 +150mg /L,the adsorption time 180min,the particle size 200 mesh,the maximum adsorption capacity was obtained.The maximum adsorption capacity was 64.0mg /g and 68.5mg /g for modification of banana peel by ethanol and acetic acid( v∶v = 5∶1) and immobilization of bana...