文章信息/Info

Title:

 Reseach on Recovery of Nickel in Electroplating Waste Water Using Slot Cycle Electrolysis

作者:

王寶群; 宋寶珍; 劉京玲; 王威

(中國科學院過程工程研究所 生化工程國家重點實驗室，北京 100190)

Author(s):

 WANG Baoqun; SONG Baozhen;  LIU Jingling; WANG Wei

(National Key Laboratory of Biochemical Engineering，Institute of Process Engineering, CAS, Beijing 100190, China)

關鍵詞:

流態化; 循環電解;  電鍍廢水; 鎳; 電流效率

DOI:

10.7502/j.issn.1674-3962.2012.02.08

文獻標志碼:

A

摘要:

 對槽邊循環電解法回收電鍍廢水中Ni進行了分階段實驗研究，包括小型試驗、擴大試驗以及系統擴大試驗。試驗結果表明，適合工業生產中使用的操作條件如下：Ni離子濃度可在0��5~2��5 g/L變化，電流密度40~80 A/m��2，槽電壓3~��6 V��，pH=4��5~5��5；當Ni離子濃度保持在1��0~2��5 g/L，若連續操作電流密度采用100~150 A/m��2,則電流效率仍大于40%；若從高濃度操作到低濃度，每次回收到0��5 g/L，電流密度應取40~80 A/m��2，操作10次后，可回收到使濃度小于��0��1 g/L��，棄掉，則回收槽的回收率大于99%；由3類不同規模試驗的對比中可以看出，在相同條件下，電流效率幾乎相等。研究表明，采用槽邊循環電解法回收電鍍廢水中的Ni是完全可行的，且可保證較高回收效率。

Abstract:

 Recovery of nickel in electroplating waste water using slot cycle electrolysis has been investigated by experimentation, including pilot test, extended pilot test, and system expansion. The main results indicated the appropriate conditions of the industrial production: nickel ion concentration 0��5~2��5 g/L, current density 40~80 A/m 2, voltage of the slot cycle 3~6 V, pH=4��5~5��5. When the concentration of nickel ions remains at 1��0~2��5 g/L, the current efficiency is still greater than 40% if the current density adopting 100~150 A/m��2 continuously; if the operation is from high concentration to low concentration and 0��5 g/L of each recycling, the current density should take from 40 to 80 A/m��2. The concentration recovered is less than 0��1 g/L 10 times later. Discard it and the recovery rate of nickel would be more than 99%. By a comparison of three tests of different scales under the same conditions, it can be found that the current efficiency is almost equal. Using edge cycle of electrolysis to recover nickel in electroplating waste water is entirely feasible, and this method can ensure a high rate of recovery.��