地下水同步除铁除锰生物滤层中漏锰现象研究

Research of Leakage of Manganese in Bio-filters for Simultaneous Removal of Iron and Manganese from Groundwater

摘要: 针对生物滤层同步去除地下水中铁锰离子过程中“漏锰”现象进行了研究,明确了“漏锰”是由亚铁离子对锰化物氧化还原引起的,试验证明了影响反应的主要因素为MnO_x质量、原水中Fe²⁺浓度及pH值等.Mn²⁺溶出的浓度与MnOsub>_x及Fe²⁺浓度均呈二次曲线关系,pH值小于5.0时促进反应发生,大于7.5时则抑制锰的析出.

Abstract: Leakage of manganese usually occurs in bio-filters for simultaneous removal of iron and manganese from groundwater is conducted in this paper.The paper argues that reduction of MnO_x by Fe²⁺ causes the phenomenon of leakage of manganese.The reaction is affected mainly by mass of MnO_x,concentration of Fe²⁺ and pH value,and which is promoted while pH value below 5.0 and inhibited while pH value is over 7.5.Released manganese concentrations showed quadratic curve relationship with mass of MnO_x and also Fe²⁺ concentration.