生物法制备聚合硫酸铁及其应用研究_英文_(6)

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生物法制备聚合硫酸铁及其应用研究

王慧敏，闵小波，柴立元，舒余德

中南大学 冶金科学与工程学院，长沙 410083

摘 要：研究生物法制备铁系絮凝剂及其影响因素。以FeSO4·7H2O为原料，利用驯化后的氧化亚铁硫杆菌(T.f)在酸性条件下的催化氧化作用制备生物聚合硫酸铁(PFS)，并确定最佳制备条件。实验表明：在反应液初始pH值1.5、硫酸铵用量0.5 g/L、初始Fe2+浓度45 g/L、接种量10%、温度30 °C时，在转速为120 r/min的恒温水浴摇床中连续培养5~6 d、可以制出pH 1.5~2.2、盐基度17.5%~22.7%、全铁含量43.87~45.24 g/L的产品。实验通过处理3种废水来考察其絮凝性能，结果表明：当PFS投加量一定时，COD去除率可达70%以上，脱色率达90%，Zn2+去除率达99%，说明PFS是一种絮凝效果优异的水处理剂。 关键词：铁系；生物聚合铁；絮凝剂

(Edited by FANG Jing-hua)