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β-环糊精硫酸钠盐在正渗透水处理中的应用

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摘要 正渗透(FO)作为新型的绿色膜分离技术在水处理应用中引起了极大的关注,然而影响FO实际应用的一个关键因素是开发合适的汲取剂。提出将β-环糊精硫酸钠盐(NaCDS)用作新型FO汲取剂,采用冰点渗透压法测定了NaCDS在不同浓度下的渗透压,并考察了汲取液浓度、膜方向、原料液盐浓度、流速以及汲取液和原料液之间温差等因素对FO性能的影响。结果表明:NaCDS可以产生较高的水通量并有效地减少反向溶质扩散通量;在膜的活性层朝向汲取液模式下,NaCDS可获得略高的水通量;当流速从0.184m/s上升至0.552m/s时,NaCDS水通量增加23%;另外,仅提高汲取液的温度而保持原料液温度不变同样可以有效地提高水通量,当原料液和汲取液之间温差达到20℃时,NaCDS水通量提高了25%。
出处 《给水排水》 CSCD 北大核心 2015年第7期147-150,共4页 Water & Wastewater Engineering
基金 国家自然科学青年基金(51308239) 华中科技大学创新研究院技术创新基金(0118261033)
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