采用XN45聚酰胺复合纳滤膜处理含锶（Sr2+）的模拟放射性废水。考察了初始离子浓度、溶液pH、离子强度和投加络合剂等情况下对Sr2+截留率的影响。结果表明，Sr2+截留率随着初始离子浓度和离子强度的增加而有所降低；pH升高时，截留率在一定pH范围内先降低后升高，在等电点(pH 5)附近达到最小值；在分别以聚丙烯酸和乙二胺四乙酸二钠（EDTA-2Na）作为络合剂的情况下，Sr2+的截留率均得到了提高,其中在[PAA]/[Sr]=5，pH＞7或[EDTA-2Na]/[Sr]=4，pH=9的情况下，Sr2+截留率均达到98%以上。

The performance of nanofiltration(NF) for treatment of strontium-containing radioactive wastewater was investigated using XN45 NF membrane. The effects of the initial strontium concentration, solution pH, ionic strength and complexation phenomena on strontium removal were described. The results indicated that the strontium rejection increased with decreasing initial strontium concentration and ionic strength. In addition, an increase in the solution pH reduced strontium rejection until pH = 5, at which point a further increase in pH increased strontium rejection. In the presence of a complexing agent (PAA or EDTA-2Na), the strontium rejection was generally higher than those obtained without a complexing agent. The strontium rejection reached over 98% under the conditions that [PAA]/[Sr] = 5, pH was greater than 7 or [EDTA-2Na]/[Sr] = 4, pH = 9.

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