Synthesis of carboxyl group containing hydrazine-modified polyacrylonitrile fibres and application for the removal of heavy metals

Reactive Polymers Pub Date : 1994-11-01 DOI:10.1016/0923-1137(94)90136-8

B.W. Zhang , K. Fischer , D. Bieniek , A. Kettrup

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引用次数: 53

Abstract

Carboxyl group containing hydrazine-modified polyacrylonitrile (PAN) fibre was prepared by a modified method of T. Miyamatsu and N. Oguchi. The first investigation of this modified ion exchange fibre (IEF) revealed that the maximum capacities of the modified PAN fibre for the heavy metal ions Cu²⁺, Cd²⁺, Zn²⁺, Co²⁺, Pb²⁺, Cr³⁺, Ni²⁺ and Hg²⁺ were 1.33, 1.30, 1.03, 1.02, 0.98, 0.96, 0.95 and 0.63 mmol/g (dry weight), respectively. According to the distribution coefficients the order of decreasing selectivity of the cation exchanger for the various metal ions was Cu²⁺ > Zn²⁺ > Cr³⁺ > Hg²⁺ > Cd²⁺ > Pb²⁺ > Ni²⁺ > Co²⁺. The product could be reused after regeneration with diluted nitric acid. The high exchange capacity for copper, which offers possibilities for the application of the material for industrial purposes, was examined in additional experiments.

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含羧基肼改性聚丙烯腈纤维的合成及其在重金属脱除中的应用

采用宫松和Oguchi的改性方法制备了含羧基肼改性聚丙烯腈(PAN)纤维。初步研究表明，改性后的PAN纤维对重金属离子Cu2+、Cd2+、Zn2+、Co2+、Pb2+、Cr3+、Ni2+和Hg2+的最大容量分别为1.33、1.30、1.03、1.02、0.98、0.96、0.95和0.63 mmol/g(干重)。从分布系数来看，阳离子交换剂对各种金属离子选择性降低的顺序为Cu2+ >Zn2 +比;Cr3 +比;Hg2 +比;Cd2 +比;Pb2 +比;Ni2 +比;二氧化碳+。产品经稀释硝酸再生后可重复使用。铜的高交换能力，这为材料在工业用途上的应用提供了可能性，在另外的实验中进行了检验。

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