固定化啤酒废酵母吸附Cr^(6+)的特性研究

Biosorption of Cr^(6+) by Immobilized Waste Beer Yeast Biomass

用啤酒废酵母作吸附剂,以海藻酸钠作包埋剂将酵母固定化制作成小球,分别从吸附时间、温度、酵母小球用量、Cr6+溶液质量浓度、pH值等因素,研究啤酒废酵母菌体对Cr6+的吸附特性。确定固定化啤酒废酵母对Cr6+吸附的最佳条件为:吸附时间1.5h、温度15℃、酵母小球用量3g/20mL、Cr6+溶液质量浓度40mg/L、pH值为3。在该条件下,对Cr6+最大吸附率为27.6%,最大吸附量为10.8mg/g。其中pH值、Cr6+溶液质量浓度、酵母小球用量3个因素对Cr6+吸附特性影响较大,其余因素影响较小。

Waste beer yeast was embedded into sodium alginate based spheres for providing a bioadsorbent for industrial wastewater treatment. The effects of length of adsorption time,temperature,adsorbent amount,Cr^6＋ concentration and pH on Cr6＋ adsorption ratio were examined. The optimal adsorption conditions were determined as follows：length of adsorption time 1 h; temperature 15 ℃; adsorbent amount 3 g/20 mL; Cr^6＋ concentration 40 mg/L; and pH 3. Under these conditions,the maximum adsorption ratio was 27.6%,and the maximum adsorption quantity was 10.8 mg/g. pH,Cr^6＋ concentration and adsorbent amount had larger effect on Cr^6＋ adsorption than two other factors.