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首页> 外文期刊>Separation and Purification Technology >The rapid boron uptake by multi-hydroxyl functional hairy polymers
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The rapid boron uptake by multi-hydroxyl functional hairy polymers

机译：多羟基官能多毛聚合物对硼的快速吸收

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摘要

A novel functional polymer resin with extremely rapid and selective boron sorption ability is reported. Thus, 2-hydroxyethylamino 2,3-propanediol was introduced to dangling poly(glycidyl methacrylate) graft chains on crosslinked poly(sryrene-divinyl benzene) (PS-DVB) microspheres (210-420 μm), by ring opening of the oxirane units involved. The resulting hairy polymer with multi-hydroxyalkylamine functions on the graft chains was demonstrated to bind boric acid (3.28 mmol g~(-1)) selectively; similar to ordinary bead polymers with the same chelating units tethered directly to the particle surfaces. Significant difference was unusually rapid boron uptake ability of this new polymer material, due to partial mobility of the dangling grafts carrying the boron chelating ligands. Batch kinetic experiments showed that, 1 g of the polymer sample is able to remove trace boron (100 ppm) from 100 mL aqueous solution (non-buffered) within contact-times less than 2 min. This is very short time comparing with those of ordinary functional bead polymers (i.e. 30 min). Also regeneration of the boron loaded resin by acid treatment was shown to be reasonably fast. Effect of pH, presence of some foreign ions on the boron sorption and regenerability of the polymer were investigated and compared with those of the ordinary functional bead polymers.
机译：据报道，新型的功能性聚合物树脂具有极快的选择性硼吸附能力。因此，通过环氧乙烷单元的开环，将2-羟乙基氨基2,3-丙二醇引入到交联的聚（苯乙烯-二乙烯基苯）（PS-DVB）微球（210-420μm）上的聚甲基丙烯酸缩水甘油酯接枝链上。参与。所得接枝链上具有多羟基烷基胺官能团的毛状聚合物被证明与硼酸（3.28 mmol g〜（-1））选择性结合;与普通的珠状聚合物相似，具有相同的螯合单元直接束缚在颗粒表面。显着差异是这种新聚合物材料异常快速的硼吸收能力，这是由于带有硼螯合配体的悬空接枝的部分迁移性所致。间歇动力学实验表明，1克聚合物样品能够在不到2分钟的接触时间内从100毫升水溶液（非缓冲液）中除去痕量硼（100 ppm）。与普通功能性珠状聚合物相比，这是非常短的时间（即30分钟）。还显示出通过酸处理的负载硼的树脂的再生相当快。研究了pH，一些外来离子的存在对聚合物硼吸附和可再生性的影响，并将其与普通功能性珠状聚合物进行了比较。

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