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High internal phase emulsion hierarchical porous polymer grafting polyol compounds for boron removal
Journal of Water Process Engineering ( IF 7 ) Pub Date : 2021-03-26 , DOI: 10.1016/j.jwpe.2021.102025
Zhe Wang , Kaiyuan Ma , Yufeng Zhang , Xinbo Zhang , Huu Hao Ngo , Jianqiang Meng , Lingzhong Du

Removing micro-pollutants is an important global challenge for the development of good adsorbents and environmental engineering issues. In this work, the structure of hierarchically and interconnected porous polymer has been fabricated by a high internal phase emulsion (HIPE) with water-in-oil and used for removing boron from water. This porous polymer was synthesized via monomer radical polymerization and utilized the active sites of monomer –Cl. In this way the vicinal hydroxyl group of N-Methyl-d-glucamine (NMG) was successfully introduced and grafted into HIPE by nucleophilic substitution reaction under the catalysis of triethylamine. The maximum boron uptake capacity was 2.54 mmol/g at a boron concentration of 100 mg/L, and reached adsorption equilibrium after about 2 h. Compared to traditional adsorption membrane materials, the HIPE porous polymer had better mechanical strength and able to resist acid and alkaline in the long-term. Meanwhile the regeneration efficiency of the HIPE30 %-g-PNMG porous polymer remained at 100 % after being used for 10 cycles.



中文翻译:

用于脱硼的高内相乳液分级多孔聚合物接枝多元醇化合物

去除微量污染物是发展良好吸附剂和环境工程问题的重要全球挑战。在这项工作中,分层和相互连接的多孔聚合物的结构是由具有油包水的高内相乳液(HIPE)制成的,并用于从水中去除硼。该多孔聚合物是通过单体自由基聚合反应合成的,并利用了单体-Cl的活性位点。这样,N-甲基-d的邻位羟基在三乙胺的催化下,通过亲核取代反应成功地引入了β-葡糖胺(NMG)并将其接枝到HIPE中。在硼浓度为100 mg / L时,最大硼吸收能力为2.54 mmol / g,约2小时后达到吸附平衡。与传统的吸附膜材料相比,HIPE多孔聚合物具有更好的机械强度,并且能够长期抵抗酸和碱。同时,HIPE30%-g-PNMG多孔聚合物在使用10个循环后的再生效率保持在100%。

更新日期:2021-03-27
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