用于低压去除重金属离子的抗有机污染和抗生物污染聚（哌嗪酰胺）薄膜纳米复合膜。

Anti-organic fouling and anti-biofouling poly(piperazineamide) thin film nanocomposite membranes for low pressure removal of heavy metal ions.

机构信息

AcSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar, 364002, Gujarat, India; Reverse Osmosis Membrane Division, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India.

AcSIR-Central Salt & Marine Chemicals Research Institute, G. B Marg, Bhavnagar, 364002, Gujarat, India; Marine Biotechnology and Ecology Division, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India.

出版信息

J Hazard Mater. 2018 Feb 5;343:86-97. doi: 10.1016/j.jhazmat.2017.09.016. Epub 2017 Sep 11.

DOI:10.1016/j.jhazmat.2017.09.016

PMID:28946135

Abstract

Propensity towards anti-organic fouling, anti-biofouling property and low rejection of multivalent cation (monovalent counter ion) restricts the application of the state-of-art poly(piperazineamide) [poly(PIP)] thin film composite (TFC) nanofiltration (NF) membrane for the treatment of water containing toxic heavy metal ions, organic fouling agents and microbes. Herein, we report the preparation of thin film nanocomposite (TFNC) NF membranes with improved heavy metal ions rejection efficacy, anti-biofouling property, and anti-organic fouling properties compared to that of poly(PIP) TFC NF membrane. The TFNC NF membranes were prepared by the interfacial polymerization (IP) between PIP and trimesoyl chloride followed by post-treatment with polyethyleneimine (PEI) or PEI-polyethylene glycol conjugate and then immobilization of Ag NP. The IP was conducted on a polyethersulfone/poly(methyl methacrylate)-co-poly(vinyl pyrollidone)/silver nanoparticle (Ag NP) blend ultrafiltration membrane support. The TFNC membranes exhibited >99% rejection of Pb, 91-97% rejection of Cd, 90-96% rejection of Co and 95-99% rejection of Cu with permeate flux ∼40Lmh at applied pressure 0.5MPa. The improved heavy metal ions rejection efficacy of the modified NF membranes is attributed to the development of positive surface charge as well as lowering of surface pore size compared to that of unmodified poly(PIP) TFC NF membrane.

摘要

抗有机污染、抗生物污染性能差，以及对多价阳离子（单价抗衡离子）的低截留率限制了最先进的聚（哌嗪酰胺）[聚（PIP）]薄膜复合（TFC）纳滤（NF）膜在处理含有有毒重金属离子、有机污染物和微生物的水中的应用。在此，我们报告了制备具有改进的重金属离子截留效率、抗生物污染性能和抗有机污染性能的薄膜纳米复合（TFNC）NF 膜，与聚（PIP）TFC NF 膜相比。TFNC NF 膜是通过 PIP 和均苯三甲酰氯之间的界面聚合（IP）制备的，然后用聚乙烯亚胺（PEI）或 PEI-聚乙二醇缀合物进行后处理，然后固定 Ag NP。IP 在聚醚砜/聚（甲基丙烯酸甲酯）-共-聚（乙烯基吡咯烷酮）/银纳米颗粒（Ag NP）共混超滤膜支撑体上进行。TFNC 膜对 Pb 的截留率>99%，对 Cd 的截留率为 91-97%，对 Co 的截留率为 90-96%，对 Cu 的截留率为 95-99%，在 0.5MPa 的应用压力下，渗透通量约为 40Lmh。改性 NF 膜重金属离子截留效率的提高归因于表面正电荷的发展以及与未改性聚（PIP）TFC NF 膜相比表面孔径的降低。