Abstract:

This paper introduces the method of using phosphoric acid activation to prepare activated carbon from cotton stalks. The effects of various factors in the preparation process on the adsorption property of activated carbon have been investigated. The optional condition of preparation of activated carbon from cotton stalks is put forward. Meanwhile the adsorbent property of activated carbon on heavy mental ion Cr⁶⁺ is determined. The result shows the decolorizing ability of the prepared activated carbon to methylene blue is 292.7 mg·g^-1, iodine value of activated carbon 898.2 mg·g^-1. And the yield of the prepared activated carbon is 34%.

Key words: cotton stalks, activated carbon, phosphoric acid, activation