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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and Characterization of a Phosphonylated Polypropylene Ion Exchanger
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Preparation and Characterization of a Phosphonylated Polypropylene Ion Exchanger

机译：膦酰化聚丙烯离子交换剂的制备与表征

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摘要

Because typical ion exchange resins used for treating wastewater contain sulfur binding sites and suffer from application limitations, a new ion exchange system was developed by phosphonylating nonwoven polypropylene fabric (PP). These fabrics were phosphonylated for 0.5, 1,2, and 4 h; amount of phosphorus on phosphonylated PP increased with an increase in phosphonylation time. After hydrolysis, the appropriate phosphonylated sample was placed in a glass column where a europium (Eu~(3+)), lead (Pb~(2+)), or mercury (Hg~(2+)) salt solution was passed through the fabrics after an equilibration period of 5 min. Filtrate samples were then analyzed by atomic absorption spectroscopy for metal concentration. Results showed that metal binding efficiency for Eu~(3+) increased with an increase in phosphonylation time; Pb~(2+) binding efficiency increased up to 2 h phosphonylation time and then decreased; Hg~(2+) binding efficiency was practically independent of phosphonylation time. PP fabrics were also sulfonated and tested for binding efficiency to determine if phosphorus ws a better binding site than sulfur. By comparing the results from phosphonylated PP and sulfonated PP. datashowed that phosphonylated PP bound metal ions at a higher efficiency than sulfonated PP. Also, phosphonylated PP had higher binding efficiencies with Eu~(3+) and Pb~(2+) than a commercial exchange resin.
机译：因为用于处理废水的典型离子交换树脂包含硫键合位点，并且受到应用限制，所以通过对非织造聚丙烯织物（PP）进行磷酰化开发了一种新的离子交换系统。这些织物被磷酸化0.5、1,2和4小时;膦酰化PP上的磷含量随膦酰化时间的增加而增加。水解后，将合适的膦酰化样品放入玻璃柱中，在其中通过a（Eu〜（3+）），铅（Pb〜（2+））或汞（Hg〜（2+））盐溶液5分钟的平衡时间后，织物。然后通过原子吸收光谱法分析滤液样品中的金属浓度。结果表明，Eu〜（3+）的金属结合效率随膦酰化时间的增加而增加。 Pb〜（2+）的结合效率最高可达2 h的膦酰化时间，然后下降; Hg〜（2+）的结合效率实际上与膦酰化时间无关。还对PP织物进行了磺化处理并测试了结合效率，以确定磷是否比硫具有更好的结合位点。通过比较膦酰化PP和磺化PP的结果。数据表明，与磺化PP相比，膦酰化PP结合金属离子的效率更高。同样，与商业交换树脂相比，膦酰化PP与Eu〜（3+）和Pb〜（2+）的结合效率更高。

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