Study on parameters of adsorption of heavy metal ions Cr6+ by banana peel adsorbent

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 banana peel by Sodium alginate and gelatin ( m∶m = 4∶1) respectively.It was both increased about 12% compared with unmodified and mobilized banana peel.These results showed that the modified and immobilized banana peel had a powerful adsorption performance for Cr6 +and could be used as a favorable bio-adsorbent in water treatment.