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用于在竞争性阳离子存在下回收钾的聚合物包埋膜（PIM）

Polymer Inclusion Membranes (PIM) for the Recovery of Potassium in the Presence of Competitive Cations.

作者信息

Casadellà Anna, Schaetzle Olivier, Nijmeijer Kitty, Loos Katja

机构信息

Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.

Wetsus, European Centre of Excellence for Sustainable Water Technology, P.O. Box 1113, 8911 MA Leeuwarden, The Netherlands.

出版信息

Polymers (Basel). 2016 Mar 15;8(3):76. doi: 10.3390/polym8030076.

DOI:10.3390/polym8030076
PMID:30979175
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6432578/
Abstract

Potassium is an important nutrient used in fertilizers but is not always naturally available We investigated the properties of polymer inclusion membranes (PIM) regarding their selective recovery of K⁺ over competitive ions typically present in urine (Na⁺ and NH₄⁺). The greatest flux was observed when the ratio of mass 2-nitrophenyl octyl ether (2-NPOE) used as plasticizer to cellulose triacetate (CTA) used as polymer was 0.25. The highest flux was achieved with a content of 24.8 wt % of dicyclohexan-18-crown-6 (DCH18C6) used as carrier, although the highest selectivity was observed with a content of 14.0 wt % of DCH18C6. We also studied whether the transport mechanism occurring in our system was based on co-transport of a counter-ion or ion exchange. Two different receiving phases (ultrapure water and 100 mM HCl) were tested. Results on transport mechanisms suggest that co-transport of cations and anions is taking place across our PIMs. The membrane deteriorated and lost its properties when the receiving phase was acidic; we suggested that this was due to hydrolysis of CTA. The greatest flux and selectivity were observed in ultrapure water as receiving phase.

摘要

钾是肥料中使用的一种重要养分，但并非总能自然获取。我们研究了聚合物包容膜（PIM）对尿液中典型竞争离子（Na⁺和NH₄⁺）选择性回收K⁺的性能。当用作增塑剂的2-硝基苯基辛基醚（2-NPOE）与用作聚合物的三醋酸纤维素（CTA）的质量比为0.25时，观察到最大通量。以用作载体的二环己基-18-冠-6（DCH18C6）含量为24.8 wt%时实现了最高通量，不过以DCH18C6含量为14.0 wt%时观察到最高选择性。我们还研究了我们系统中发生的传输机制是基于抗衡离子的共运输还是离子交换。测试了两种不同的接收相（超纯水和100 mM HCl）。传输机制的结果表明，阳离子和阴离子的共运输正在我们的PIM中发生。当接收相为酸性时，膜会恶化并失去其性能；我们认为这是由于CTA的水解。以超纯水作为接收相时观察到最大通量和选择性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/2af23b7d2770/polymers-08-00076-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/6e1fc8c23240/polymers-08-00076-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/4315e4fae3ff/polymers-08-00076-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/68c633b7e257/polymers-08-00076-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/9cd744625c04/polymers-08-00076-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/eda22f3e73c5/polymers-08-00076-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/db746893f484/polymers-08-00076-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/a39632f1c94f/polymers-08-00076-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/d94c4cb48d8f/polymers-08-00076-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/2af23b7d2770/polymers-08-00076-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/127aef6fae14/polymers-08-00076-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/3e452f5fef99/polymers-08-00076-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/5a0720ce9182/polymers-08-00076-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/6e1fc8c23240/polymers-08-00076-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/4315e4fae3ff/polymers-08-00076-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/68c633b7e257/polymers-08-00076-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/9cd744625c04/polymers-08-00076-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/eda22f3e73c5/polymers-08-00076-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/db746893f484/polymers-08-00076-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/a39632f1c94f/polymers-08-00076-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/d94c4cb48d8f/polymers-08-00076-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7cb3/6432578/2af23b7d2770/polymers-08-00076-g012.jpg

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