进行了小型试验，以评估反渗透（RO）和纳滤（NF）膜在去除合成淡水和水源水中砷（As）方面的有效性。作者研究了操作条件（施加压力和给水温度）和溶液化学成分（如氧化状态、pH值和共存无机溶质的存在）的影响。在各种操作条件下，通过反渗透和紧密的纳滤膜，As（V）和As（III）都能有效地从合成淡水中去除。As物种相对较大的分子量（>125 g/mol）决定了它们的分离行为。施加的压力对砷的去除几乎没有影响，但给水温度的升高随着砷的去除而降低了一小部分。As（III）和As（V）的去除率相当，As（V）对As（III）没有明显的优先排斥作用。溶液pH值在4到8之间的变化也不会影响被测膜对As物种的去除，尽管As（V）的形态和电荷发生了变化。 共存的无机溶质对砷的去除只有轻微的影响。尽管存在浊度、天然有机物和多种共存溶质，但从水源水中去除砷的效果与使用合成淡水获得的效果相当。包括41个参考文献、表格、图表。

Bench scale experiments were performed to assess the effectiveness of reverse osmosis (RO) and nanofiltration (NF) membranes in removing arsenic (As) from synthetic freshwater and source water. The authors examined the effects of operational conditions (applied pressure and feedwater temperature) and solution chemical composition (As oxidation state, pH, and presence of co-occurring inorganic solutes). Both As(V) and As(III) were effectively removed from synthetic freshwater by RO and tight NF membranes over a wide range of operational conditions. The relatively large molecular weight (>125 g/mol) of the As species governed their separation behavior. Applied pressure had little effect on As removal, but an increase in feedwater temperature decreased As removal by a small percentage. Removals of As(III) and As(V) were comparable, with no significant preferential rejection of As(V) over As(III). Variations in solution pH from 4 to 8 also did not affect the removal of As species by the membranes tested, despite changes in the speciation and charge of As(V). Co-occurring inorganic solutes had only a slight effect on As removal. Removal of As from source water was comparable to that obtained with synthetic freshwater, despite the presence of turbidity, natural organic matter, and a variety of co-occurring solutes. Includes 41 references, tables, figures.