含氨废水中锌离子和镍离子的分离与纯化
Separation and Purification of Zinc(II) and Nickel(II) Ions from Ammonia-Containing Waste Water

在工业氨化处理过程需要多金属离子组分的催化组分中，通常涉及到金属锌与镍的复合使用，在催化后的碱性溶液中会含有大量的锌、镍离子，需要进行处理和回收。本文中含氨溶液主要来源于本地某公司生产敌草快中间体时所产生的，其中在偶联阶段，使用锌粉、氯化镍等催化剂，而产生了大量的含锌与镍离子的氨水废液。它们对水环境和生态的危害很大，且分离成本很高；因此，针对氨化废水中的镍与锌离子分离，提出了一种简便可行、分离效果好、成本低、适合工业化应用的纯化方法。
The catalytic components containing multi-metal ions in the industrial ammonification process, usually involved in the combination of zinc and nickel metals/ions. After completion of catalytic reaction, a large amount of zinc(II) ion along with small scale nickel(II) ion is left in the alkaline solution, which must be treated and further recovered. The presented ammonia-containing waste solution was supplied by a local company that produces the diquat chemical intermediate. Zinc powder and nickel(II) dichloride were employed as catalysts in the coupling reaction, of which the zinc(II)- and nickel(II)-ammonia complexes consequently formed. Specially, the high concentration nickel (II) ions would cause great harm to the water environment and ecosystem. Generally, the cost of separation of zinc(II) and nickel(II) ions is relatively high. For these reasons, a practical purification method with good separation effect, low cost and suitable for industrial application is reported for the separation of zinc(II) and nickel(II) ions in the ammonia-containing waste water.