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Dye Removal Using Sustainable Membrane Adsorbents Produced from Melamine Formaldehyde−Cellulose Nanocrystals and Hard Wood Pulp
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-11-13 , DOI: 10.1021/acs.iecr.0c04033 Nathan Grishkewich 1 , Nishil Mohammed 2 , Stephen Wei 1 , Madhav Vasudev 1 , Zengqian Shi 1 , Richard M. Berry 3 , Kam Chiu Tam 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-11-13 , DOI: 10.1021/acs.iecr.0c04033 Nathan Grishkewich 1 , Nishil Mohammed 2 , Stephen Wei 1 , Madhav Vasudev 1 , Zengqian Shi 1 , Richard M. Berry 3 , Kam Chiu Tam 1
Affiliation
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Melamine formaldehyde (MF)-functionalized cellulose nanocrystals (CNC) prepared via an in situ polycondensation reaction were incorporated into hardwood pulp (HWP) membrane filters to remove anionic contaminants in water. Batch adsorption experimental data were fitted to the Freundlich model, yielding a capacity of 80 mg/g for methyl orange (MO), and the adsorption capacity was enhanced at higher temperatures. The incorporation of MF–CNCs in HWP membranes up to 14 wt % resulted in a 6-fold improvement in the wet strength and greater dye removal. However, the inclusion of MF–CNCs reduced the flux through the membranes due to the reduction of the pore size. Using a custom-designed filter cartridge, up to 20 layers of MF–CNC incorporated HWP membranes were stacked and operated at a flow pressure of up to 30 psi. Filtration studies confirmed that MF–CNCs readily bind MO inside the HWP matrix, making them effective filtration media. Functionalized CNC-incorporated HWP membranes hold great promise for the removal of a wide variety of contaminants. The simplicity and low cost in preparing and using these membranes for the removal of contaminants make this system suitable for a point-of-use water treatment system.
中文翻译：
使用三聚氰胺甲醛纤维素纳米晶体和硬木浆生产的可持续膜吸附剂去除染料
通过原位制备的三聚氰胺甲醛（MF）-官能化纤维素纳米晶体（CNC）将缩聚反应引入硬木浆（HWP）膜过滤器中，以去除水中的阴离子污染物。分批吸附实验数据拟合到Freundlich模型，产生80 mg / g的甲基橙（MO）容量，并且在较高温度下吸附容量得到增强。MF-CNC在HWP膜中的掺入量高达14 wt％，导致湿强度提高了6倍，并且染料去除率更高。但是，由于孔径减小，MF-CNC的加入减少了通过膜的通量。使用定制设计的滤芯，可堆叠多达20层装有MF-CNC的HWP膜，并在高达30 psi的流动压力下运行。过滤研究证实，MF-CNC可以轻松结合HWP基质内的MO，使其成为有效的过滤介质。结合了功能化CNC的HWP膜对于去除多种污染物具有广阔的前景。制备和使用这些膜去除污染物的简单性和低成本使该系统适用于使用点水处理系统。
更新日期：2020-11-25
中文翻译：
使用三聚氰胺甲醛纤维素纳米晶体和硬木浆生产的可持续膜吸附剂去除染料
通过原位制备的三聚氰胺甲醛（MF）-官能化纤维素纳米晶体（CNC）将缩聚反应引入硬木浆（HWP）膜过滤器中，以去除水中的阴离子污染物。分批吸附实验数据拟合到Freundlich模型，产生80 mg / g的甲基橙（MO）容量，并且在较高温度下吸附容量得到增强。MF-CNC在HWP膜中的掺入量高达14 wt％，导致湿强度提高了6倍，并且染料去除率更高。但是，由于孔径减小，MF-CNC的加入减少了通过膜的通量。使用定制设计的滤芯，可堆叠多达20层装有MF-CNC的HWP膜，并在高达30 psi的流动压力下运行。过滤研究证实，MF-CNC可以轻松结合HWP基质内的MO，使其成为有效的过滤介质。结合了功能化CNC的HWP膜对于去除多种污染物具有广阔的前景。制备和使用这些膜去除污染物的简单性和低成本使该系统适用于使用点水处理系统。
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