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Intensification and optimization of the characteristics of polyacrylonitrile nanofiltration membranes with improved performance through experimental design and statistical analysis
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2020-05-27 , DOI: 10.1002/pen.25417 Seyed Saeid Hosseini 1, 2 , Amir Hossein Khodakarami 1 , Edward Ndumiso Nxumalo 2
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2020-05-27 , DOI: 10.1002/pen.25417 Seyed Saeid Hosseini 1, 2 , Amir Hossein Khodakarami 1 , Edward Ndumiso Nxumalo 2
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The present study aims to employ experimental design and statistical analysis in order to investigate in detail the effect of various prominent parameters on the characteristics and performance of polyacrylonitrile nanofiltration membranes for the treatment of electroplating wastewaters targeting Ni, Cr, and Zn ions. Incorporation of TiO2 into the membrane matrix was effective in improving pure water flux (PWF) by ~16%. Also, PWF and Ni rejection of membranes escalated to 118.55 L m−2 h−1 and 90.79%, respectively upon addition of 1.5 wt% citric acid to the dope. Variation in coagulation bath temperature from 25°C to 45°C led to the formation of membranes having higher porosity with enhanced PWF by about 25% at the expense of only 5% reduction in Ni rejection. Parameters were optimized by analysis of variance (ANOVA). In contrast to the effect of feed concentration, an increase in feed pressure and pH enhanced permeate flux and total ion rejection. Similarly, permeate flux increased at higher operational temperatures without change in total rejection. A mathematical model was developed by applying ANOVA and the best combination of operating parameters was obtained by optimization.
中文翻译：
通过实验设计和统计分析增强和优化性能提高的聚丙烯腈纳滤膜的特性
本研究旨在通过实验设计和统计分析来详细研究各种主要参数对聚丙烯腈纳米过滤膜的特性和性能的影响，该膜用于处理针对Ni，Cr和Zn离子的电镀废水。将TiO 2掺入膜基质可有效提高纯水通量（PWF）约16％。此外，膜的PWF和Ni排斥率升至118.55 L m -2 h -1在将1.5重量％柠檬酸添加到浓液中时，分别为90.79％和90.79％。凝固浴温度从25°C到45°C的变化导致形成了具有更高孔隙率的膜，PWF值提高了约25％，而Ni排泄率仅降低了5％。通过方差分析（ANOVA）优化参数。与进料浓度的影响相反，进料压力和pH的增加会增强渗透通量和总离子排斥。同样，在较高的工作温度下，渗透通量增加，总排阻率不变。通过应用方差分析开发了数学模型，并通过优化获得了最佳的运行参数组合。
更新日期：2020-05-27
中文翻译：
通过实验设计和统计分析增强和优化性能提高的聚丙烯腈纳滤膜的特性
本研究旨在通过实验设计和统计分析来详细研究各种主要参数对聚丙烯腈纳米过滤膜的特性和性能的影响，该膜用于处理针对Ni，Cr和Zn离子的电镀废水。将TiO 2掺入膜基质可有效提高纯水通量（PWF）约16％。此外，膜的PWF和Ni排斥率升至118.55 L m -2 h -1在将1.5重量％柠檬酸添加到浓液中时，分别为90.79％和90.79％。凝固浴温度从25°C到45°C的变化导致形成了具有更高孔隙率的膜，PWF值提高了约25％，而Ni排泄率仅降低了5％。通过方差分析（ANOVA）优化参数。与进料浓度的影响相反，进料压力和pH的增加会增强渗透通量和总离子排斥。同样，在较高的工作温度下，渗透通量增加，总排阻率不变。通过应用方差分析开发了数学模型，并通过优化获得了最佳的运行参数组合。
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