Synthesis of a Metal Ion Adsorbent from Banana Fibers and Its Adsorption Properties for Rare Metal Ions

Journal of ion exchange Pub Date : 2016-09-25 DOI:10.5182/JAIE.27.57

T. Kajiyama, Shohei Sakai, Jun G. Inoue, Toru Yoshino, Satoshi Ohmuro, Kensuke Arai, H. Kokusen

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引用次数: 1

Abstract

The synthesis of metal ion adsorbents from modified banana fibers comprising a Schiff base was investigated. The adsorption properties of a metal ion adsorbent were evaluated, and banana fiber (BF)- g -(glycidyl methacrylate)(GMA)(BF-GMA) were synthesized. A Schiff base 2,2’-{iminobis[ethane-2,1-diylnitrilo(E)methylidine]}bisphenol was synthesized via a reaction of diethylenetriamine and 5-bromo-salicyialdehyde in methanol. A metal ion adsorbent (BF-GMA(Br)) was synthesized via a reaction of the Schiff base with BF-GMA. Over 90% of La 3+ , Gd 3+ , Tm 3+ , Pr 3+ , Tb 3+ , Yb 3+ , Nd 3+ , Dy 3+ , Lu 3+ , Sm 3+ , Ho 3+ , Eu 3+ , and Er 3+ were adsorbed in a pH range of 6.0–6.6 by the synthesized metal ion adsorbent. Almost 100% of In 3+ at a pH value of 3.0–4.0 and 95% of Ga 3+ at a pH value of 3.9 were absorbed, thereby showing the maximum adsorption percentage. Almost 15% and 25% of In 3+ was adsorbed at a pH value of 1.4–1.6 and 1.8, respectively. Adsorption of Ga 3+ was barely observed in the pH range of 1.4–1.8. These results show that banana fibers can be utilized as metal ion adsorbents.

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香蕉纤维金属离子吸附剂的合成及其对稀有金属离子的吸附性能

研究了以希夫碱改性香蕉纤维为原料合成金属离子吸附剂的方法。考察了金属离子吸附剂的吸附性能，合成了香蕉纤维(BF)- g -甲基丙烯酸缩水甘油酯(BF-GMA) (BF-GMA)。以二乙基三胺和5-溴水杨醛为原料，在甲醇中合成了希夫碱2,2′-{亚胺[乙烷-2,1-二基硝基(E)甲基啶]}双酚。通过希夫碱与BF-GMA的反应，合成了一种金属离子吸附剂BF-GMA(Br)。合成的金属离子吸附剂在6.0 ~ 6.6的pH范围内吸附了90%以上的La 3+、Gd 3+、Tm 3+、Pr 3+、Tb 3+、yb3 +、Nd 3+、Dy 3+、Lu 3+、Sm 3+、Ho 3+、Eu 3+和Er 3+。在pH为3.0 ~ 4.0时，几乎100%的In 3+被吸附，在pH为3.9时，95%的Ga 3+被吸附，吸附率最大。在pH值为1.4 ~ 1.6和1.8时，in3 +的吸附量分别接近15%和25%。在pH 1.4 ~ 1.8范围内，几乎没有观察到Ga 3+的吸附。结果表明，香蕉纤维可以作为金属离子吸附剂。

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Journal of ion exchange

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