啤酒酵母吸附Cu^(2+)的模拟实验

SIMULATED EXPERIMENT OF Cu 2+ TREATMENT USING SACCHAROMYCES CEREVISIAE

研究了啤酒酵母吸附重金属Ｃｕ２＋离子的可行性及反应条件对去除作用的影响．结果表明：用啤酒酵母处理Ｃｕ２＋，在起始浓度ρ０为２０～４００ｍｇ／Ｌ的范围内，吸附量ｗ为２．９８～１２．０３ｍｇ／ｇ，说明用啤酒酵母去除重金属Ｃｕ２＋是可行的．吸附反应在１０～２０ｍｉｎ基本达到吸附平衡．最适反应温度（θ）和ｐＨ分别为１５～２０℃和４．０～６．０，酵母细胞有一最适投加用量．Ｆｒｅｕｎｄｌｉｃｈ吸附等温方程的分析表明，η与重金属离子种类有关，与酵母细胞种类关系较小；ｋ值与酵母种类和重金属离子种类有关．

The possibility of heavy metal (Cu 2+ ) treatment using Saccharomyces cerevisiae and the effects of the operational conditions on the treatment were studied. The results showed when ρ (Cu 2+ ) ranged between 20～400 mg/L and the specific biosorption was 2. 98～12. 03 mg/g, Cu 2+ treatment by Saccharomyces cerevisiae was feasible. The main removal mechanism was biosorption process. The biosorption equilibrium was achieved within 10～20 minutes. The optimum temperature was 15～20℃ and optimum pH ranged between 4. 0～6. 0. The analyses of Freundlich adsorption equation indicated that η was mainly related with the kinds of heavy metals, and k was related with the species of yeast and the kinds of heavy metals.