一种成功的除砷技术必须得到推广 能够同时去除砷酸盐和亚砷酸盐。 研究表明，低压纳滤 （NF）膜去除大部分砷酸盐，但仅去除 一些亚砷酸盐。开发膜过滤技术 几位研究人员发现，它具有清除砷酸盐的能力 建议将亚砷酸盐氧化成 砷酸盐可以改善纳滤膜的性能。 目前的研究通过以下方式对这一假设进行了调查: 评估氧化步骤对砷的影响 两种NF膜和一种低能膜的去除性能 反渗透膜。 由于其惰性、寿命长、操作简单， 与氧化剂敏感膜的相容性， 二氧化锰被选为伴星 用于膜过滤的氧化剂。后果 表明用二氧化锰预氧化 显著提高了砷的去除率。 治疗 使用膜过滤处理废水的设施 硬水或微咸水中可能含有二氧化锰 提供低维护、经济高效的预处理 如果需要额外的砷去除，则可选择 需要达到10微克/升的监管目标 砷包括38个参考文献、表格、图表。

A successful arsenic removal technology must be capable of removing both arsenate and arsenite. Research has shown that low-pressure nanofiltration (NF) membranes remove most of the arsenate but only some of the arsenite. To exploit membrane filtration's ability to remove arsenate, several researchers have suggested that a pretreatment step oxidizing arsenite to arsenate would improve the performance of NF membranes. The current study investigated this hypothesis by assessing the effect of the oxidation step on the arsenic removal performance of two NF membranes and a low-energy reverse osmosis membrane. Because of its inert nature, long life, simple operation, and compatibility with oxidant-sensitive membranes, manganese dioxide was chosen as the companion oxidant for membrane filtration. Results indicated that preoxidation with manganese dioxide significantly enhanced arsenic removal. For treatment facilities using membrane filtration to treat hard or brackish water, manganese dioxide may provide a low-maintenance, cost-effective pretreatment alternative if additional arsenic removal is required to meet the regulatory target of 10 µg/L arsenic. Includes 38 references, tables, figures.