Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Bangalore, 562112, India.
Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Bangalore, 562112, India.
J Environ Manage. 2019 Feb 15;232:372-381. doi: 10.1016/j.jenvman.2018.11.093. Epub 2018 Nov 27.
This study investigates the removal of heavy metal ions and humic acid using Cellulose acetate (CA) and Poly (methyl vinyl ether-alt-maleic acid) (PMVEMA) blend membranes. Antifouling properties of blend membranes were also investigated. Flat sheet membranes were prepared by phase inversion technique using different concentrations of CA and PMVEMA. The prepared membranes were characterized and their performance was evaluated by measuring pure water flux, water uptake capacity and humic acid removal. Rejection of humic acid (HA) was observed to be around 97% for all the blend membranes because of electrostatic interactions between the functional groups of HA and blends. The fouling characteristics of the membranes was assessed using HA as a foulant and the antifouling capacity of blend membranes was observed to be greater with a flux recovery ratio of almost 95% when compared to bare CA, commercial CA (TechInc) and other reported CA blends used for HA rejection. Also, the blend membranes were very effective in removing heavy metal ions (Pb, Cd and Cr) and humic acid simultaneously. Overall, the PMVEMA modified CA membranes can open up new possibilities in enhancing the hydrophilicity, permeability and antifouling properties.
本研究使用醋酸纤维素（CA）和聚（甲基乙烯基醚-马来酸共聚物）（PMVEMA）共混膜来去除重金属离子和腐殖酸。还研究了共混膜的抗污染性能。通过相转化技术，使用不同浓度的 CA 和 PMVEMA 制备了平板膜。对制备的膜进行了表征，并通过测量纯水通量、吸水率和腐殖酸去除率来评估其性能。由于腐殖酸（HA）的功能基团与共混物之间的静电相互作用，所有共混膜对腐殖酸的去除率都在 97%左右。使用 HA 作为污染物评估了膜的污染特性，与裸 CA、商业 CA（TechInc）和其他用于 HA 去除的报道的 CA 共混物相比，共混膜的抗污染能力更大，通量恢复率接近 95%。此外，共混膜还能有效去除重金属离子（Pb、Cd 和 Cr）和腐殖酸。总的来说，PMVEMA 改性 CA 膜可以为提高亲水性、渗透性和抗污染性能开辟新的可能性。
