内聚乙醇固定化硫酸盐还原菌同步处理废水中硫酸盐和铬

摘要

Cr(Ⅵ) and SO42-were seriously threatening to ecology environment.A novel immobilized living sulfate reducing bacteria (SRB) of embedding ethanol as inner carbon source had been prepared in the study with polyvinyl alcohol and sodium alginate as crosslinking agent,The experiment focused on the removal effect of Cr(Ⅵ) and SO42-by the novel biosorption under the condition of initial Cr(Ⅵ) and sulfate concentration of 100,200 mg/L,respectively.It had been demonstrated that the immobilized beads of embedding ethanol had great removal effect of Cr(Ⅵ) and SO42-.The results indicated that removal amounts of Cr(Ⅵ) and SO42-reached up to 341.87,1 680 μg/g,respectively.Removal efficiencies of Cr(Ⅵ) and SO42-reached up to 97.43 ％ and 99.30％,respectively.A hydrophilic microenvironment had been constituted by reticular formation of the beads to help the bacteria avoid interfering from the environment.It had been demonstrated that sulfate reduction played an important role for removing Cr(Ⅵ) and SO42-via analysis of scanning electron microscope and fourier transform infrared spectroscopy.%含Cr(Ⅵ)和硫酸盐废水对生态环境构成严重威胁.以聚乙烯醇和海藻酸钠为交联剂制备一种内聚已醇固定化硫酸盐还原菌(SRB)小球(简称固定化小球),探讨这种新型吸附剂对Cr(Ⅵ)、SO42-分别为100、200 mg/L废水的处理效果.结果表明,固定化小球对废水中Cr(Ⅵ)和SO42-具有较好去除效果,Cr(Ⅵ)和SO42-去除量分别高达341.87,1 680μg/g,去除率分别高达97.43％、99.30％.红外谱图、电子扫描图分析表明,固定化小球网状结构构成了细菌免受环境因素干扰的亲水微环境,硫酸盐还原在去除Cr(Ⅵ)和SO42-过程中发挥了重要作用.