Poly(vinyl diglycolic acid ester)-Grafted Polyethylene/Polypropylene Fiber Adsorbent for Selective Recovery of Samarium
Poly(vinyl diglycolic acid ester)-Grafted Polyethylene/Polypropylene Fiber Adsorbent for Selective Recovery of Samarium
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DOI：
10.1021/acsapm.1c01731
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发表时间：
2022-02
影响因子：
5
通讯作者：
T. Hamada;H. Hoshina;N. Seko
中科院分区：
文献类型：
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作者：
T. Hamada;H. Hoshina;N. Seko
通过辐射引发乙酸乙烯酯接枝聚合、皂化和二乙醇酸酐开环反应，制备了固定化三齿配体摩尔当量为1.71~4.58 mm ol/g的聚乙烯接枝聚乙烯织物(PE-PDGA)。在pH为2.5的条件下，PE-PDGA对Sm、ND、Dy等稀土金属离子有较强的吸附作用，当pH从2.5增加到4时，对Sm、ND、Dy的去除效率增加；在pH为2.5~4的范围内，PE-PDGA对Sm、Nd、Dy等稀土金属的吸附选择性高于对铜、锌、钴等金属的吸附；当初始金属浓度为100ppm时，73mgSm在1g PE-PDGA上被吸附，而在初始金属浓度为10~100ppm范围内，钴在PE-PDGA上不被吸附。因此，PE-PDGA对稀土金属具有较高的选择性，并能有效地分离Sm和Co。
Poly(vinyl diglycolic acid ester)-grafted polyethylene fabric (PE-PDGA) containing 1.71–4.58 mmol/g millimolar equivalents (meqs) of immobilized tridentate ligand were prepared through radiation-induced graft polymerization of vinyl acetate, saponification, and a ring-opening reaction of diglycolic anhydride. PE-PDGA can adsorb rare earth metal ions, such as Sm, Nd, and Dy, at pH 2.5, with an increase in the removal ratio of the Sm, Nd, and Dy ions observed with an increase in the pH from 2.5 to 4. Furthermore, PE-PDGA more selectively adsorbs rare earth metals, such as Sm, Nd, and Dy, than other metals, such as Cu, Zn, and Co, in the pH range of 2.5–4; 73 mg Sm was adsorbed on 1 g PE-PDGA at an initial metal concentration of 100 ppm at pH 3, while Co was not adsorbed on PE-PDGA in the initial metal concentration range of 10 to 100 ppm. Thus, PE-PDGA showed high selectivity toward rare earth metals, and Sm and Co could be separated effectively.