哈尔滨工业大学学报（英文版）2006，Vol.13Issue(4)：494-497,4.
Reclaim nickel and remove organics from the spent electroless nickel-plating bath by electrolysis
Reclaim nickel and remove organics from the spent electroless nickel-plating bath by electrolysis
YU Xiu-juan 1SHEN Jin 2MENG Xian-lin 1LI Shu-qin 1YAN Lei 3ZHOU Ding3
作者信息
- 1. Dept. of Environmental Science and Engineering, Harbin Institute of Technology, Harbin 150090,China
- 2. Dept. of Environmental Science and Engineering, Heilongjiang University, Harbin 150080, China
- 3. Faculty of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
- 折叠
摘要
Abstract
Typical wastes from nickel plating operations include excess drag-out solution. An electrochemical approach was made to recover the nickel and remove the organic pollutants from the spent electroless nickelplating bath. An electrolyte cell which was constructed by the cathode of porous nickel foam and the anode of Ti/RuO2 was used. During electrolysis, the nickel ion was electrodeposited at the cathode and the oxidation of the organics in the bath was conducted at the anode. The current ( i), time ( t), temperature (T) and pH of the solution affected the recovery efficiency of nickel with constant potential electrolysis. With the optimum experimental conditions of pH = 7. 6, i = 0.45 A, T = 65℃ and t = 2 h, the concentration of nickel ion was reduced from 2. 09 g/L to 0. 053 g/L and the recovery rate of nickel, the current efficiency and the consumed energy were 97.5%, 17.1%, 12.2 kWh/kg Ni, respectively. Meanwhile, total organic carbon (TOC) of the bath was reduced from 5 800 mg/L to 152. 5 mg/L and the removal efficiency of TOC was 97.3%. The recovery rate of nickel could keep to about 97% when electrodeposit was used to recover nickel for 40 hours in a laboratory batch reactor containing the spent bath. Dull nickel containing phosphorus was obtained on the cathode.关键词
spent elctroless nickel-plating bath/electrolysis/nickel ion/organicsKey words
spent elctroless nickel-plating bath/electrolysis/nickel ion/organics分类
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YU Xiu-juan,SHEN Jin,MENG Xian-lin,LI Shu-qin,YAN Lei,ZHOU Ding..Reclaim nickel and remove organics from the spent electroless nickel-plating bath by electrolysis[J].哈尔滨工业大学学报（英文版）,2006,13(4):494-497,4.
