摘要
纳滤(NF)技术因其高能效和环境友好等优点,在工业高盐废水处理领域发挥着重要的作用。本研究选取了三种商业纳滤膜(XC-N、NF30、NF60)作为研究对象,研究了膜结构与分盐性能之间的关系,并通过正交实验确定了纳滤膜对混盐溶液的最佳分离条件。结果表明,三种纳滤膜的分离层均为半芳香族聚酰胺材质。其中,XC-N膜孔径最小、孔径分布最窄、表面负电荷密度最大,对本文研究的六种盐截留率均最高。混盐条件下,最佳分离条件为:采用XC-N膜,溶液pH值为7,混盐溶液质量浓度为10000 mg/L,两种盐的质量比为1∶1,错流压力为0.3 MPa,流速为40 L/h。在此条件下,分离因子达到46.02。该研究结果不仅有助于指导高分离选择性纳滤膜设计和制备,并且为纳滤膜的工业应用提供了参考。
Nanofiltration(NF)technology plays an important role in the treatment of industrial high-salt wastewater due to its high energy efficiency and environmental benefits.In this study,three commercial nanofiltration membranes(XC-N,NF30 and NF60)were selected to investigate the relationship between membrane structure and salt separation performance,and the optimal separation conditions for mixed salt solutions were determined by orthogonal experiments.The results showed that all three membranes had a separation layer composed of semi-aromatic polyamide material.Among them,the XC-N membrane had the smallest pore size,the narrowest pore size distribution,the largest surface negative charge density,and the highest retention rate for all six salts studied in this paper.Under mixed-salt conditions,the optimal separation conditions were identified as follows:XC-N membrane,solution pH of 7,mixed-salt concentration of 10000 mg/L,salt mass ratio of 1∶1,cross-flow pressure of 0.3 MPa,and a flow rate of 40 L/h.Under these conditions,the separation factor of NaCl/Na_(2)SO_(4)reached 46.02.These findings not only provide valuable insights for the design and fabrication of NF membranes with high separation performance but also offer practical guidance for their industrial applications.
作者
王子旭
路宏伟
喻慧
彭博
罗建泉
万印华
肖春艳
冯世超
WANG Zixu;LU Hongwei;YU Hui;PENG Bo;LUO Jianquan;WAN Yinhua;XIAO Chunyan;FENG Shichao(School of Resources and Environment,Henan University of Science and Technology,Jiaozuo 454003,China;State Key Laboratory of Biopharmaceutical Preparation and Delivery,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;Hunan Aowei Technology Co.,Ltd.,Zhuzhou 412000,China)
出处
《膜科学与技术》
北大核心
2025年第4期77-85,94,共10页
Membrane Science and Technology
基金
国家重点研发计划(2021YFC3201402)。
