多螯合官能团离子交换纤维的性能研究及其在废水净化上的应用（Ⅰ）

Study on the Properties of Ion Exchange Fibres Containing Multi -Chelating Function Groups and Application for Purification of Waste Water(Ⅰ)

研究了含有乙二胺和羧基的聚丙烯腈纤维的离子交换性能。该纤维对Ｃｕ２＋，Ｃｄ２＋，Ｃｒ３＋，Ｃｏ２＋，Ｍｎ２＋，Ｎｉ２＋，Ｐｂ２＋，Ｈｇ２＋和Ｚｎ２＋等重金属离子的最大交换容量分别为１．１９，０．９６，０．８０，０．９２，０．９６，０．９６，０．６６，０．６５和０．９９ｍｍｏｌ／ｇ（干）。按其分配系数大小和对各离子的选择性的次序各离子分别为Ｃｏ２＋＞Ｚｎ２＋＞Ｃｕ２＋＞Ｎｉ２＋＞Ｍｎ２＋＞Ｐｂ２＋＞Ｃｄ２＋＞Ｃｒ３＋＞Ｈｇ２＋。该离子交换纤维可用于废水中的重金属离子的去除。

Modified polyacrylonitril(PAN) fibre containing multi-chelating function groups was prepared through three reaction steps of PAN fibre with hydrazine,ethylenediamine and sodium hydroxide. The properties and application of the new modified PAN fibre containing multi-chelating function groups are here reported.The first investigation of the modified ion exchange fibre (IEF) revealed that the maximum capacities for the heavy metal ions Cu2+,Co2+,Cd2+,Zn2+, Mn2+ Ni2+,Cr3+,Hg2+ and Pb2+ were 1.19,0.92,0.96,0.99, 0.96,0.96,0.80,0.65 and 0.66 mmol/g (dry weight),respectively.According to the distribution coefficients and selectivities for various metal ions the order was Co2+>Zn2+>Cu2+>Ni2+> Mn2+>Pb2+>Cd2+>Cr3+>Hg2+.The product could be reused after regeneration with diluted nitric acid.It might be an effective tool for removing and concentration of copper,cadimium,chromium,cobalt,nickel,lead,mercury,zinc and manganes from waste water.