在水处理中有效使用二氧化氯作为替代消毒剂可能需要去除副产品亚氯酸根离子（ClO2-）。本研究评估了碱性条件（pH 7-10）和溶解氧的存在与否对亚铁[Fe（II）]将ClO2-离子还原为氯离子（Cl-）的能力的影响。在目标pH范围内，每mg ClO2中添加3.5-4.0 mg Fe（II）以有效去除ClO2。此外，未观察到氯酸盐离子的副产物形成。质量平衡研究的结果表明，大约95%的反应ClO2-被化学还原为Cl-。包括12个参考文献、表格和图表。

Effective use of chlorine dioxide as an alternative disinfectant in water treatment may require removal of the byproduct chlorite ion (ClO2-). This study evaluated the effect of alkaline conditions (pH 7-10) and the presence-absence of dissolved oxygen on the ability of ferrous iron [Fe(II)] to reduce ClO2- ion to chloride ion (Cl-). Fe(II) dosing from 3.5-4.0 mg Fe(II) per mg ClO2- provided for efficient removal of ClO2- over the targeted pH range. Furthermore, no byproduct formation of chlorate ion was observed. Results from mass balance studies indicated that approximately 95 percent of the reacting ClO2- was chemically reduced to Cl-. Includes 12 references, tables, figures.