| 용성 및 불용성전극을 이용한 무전해 니켈 도금 산세 폐액 처리 |
| 김영신1, 전병한1, 구태완1, 김영훈2, 조순행1 |
1아주대학교 환경공학과
2아주대학교 환경안전공학과 |
| Treatment of Pickling Wastewater from Electroless Nickel Plating by Soluble Electrode and Insoluble Electrode |
| Young-Shin Kim1, Byeong-Han Jeon1, Tai-Wan Koo1, Young-Hun Kim2, Soon-Haing Cho1 |
1Department of Environmental Engineering, Ajou University
2Department of Environmental and Safety Engineering, Ajou University |
| Corresponding author |
Young-Shin Kim ,Tel: 031-219-2410 , Fax: 031-219-1613, Email: pyred2005@naver.com
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Received: December 8, 2015; Revised: December 28, 2015; Accepted: January 9, 2016. Published online: January 31, 2016. |
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| ABSTRACT |
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In order to treat electrolysis nickel plating pickling wastewater to meet the effluent limit less than 3.0 mg/L, the electrolysis process by using soluble and insoluble electrode were studied. Electrolysis using soluble electrodes has a characteristic of easy elution from the electrode which the insoluble electrodes close not release metal from the electrode. For these reasons, there exist different characteristics in nickel removal efficiency, purity of nickel sludge. With this connection, the feasibility test were concluded to develop optimal conditions for the treatment of pickling wastewater electrolysis by using soluble electrodes, insoluble electrodes. Optimal condition of current density, pH were derived from the pickling wastewater using insoluble electrodes. It was concluded the highest removal efficiency of nickel at the operation condition of at pH 9, current density of 15 mA/cm2. At these conditions, 95.3% purity of nickel sludge was achieved, iron content was 2.9%. Optimal condition when using soluble electrodes was derived current density of 10 mA/cm2, pH 9. Purity of nickel sludge was 77.3%, iron content was 21.0%. 50.7% and 24.2% of operating cost can be saved by the use of soluble electrodes and the use of insoluble electrodes, respectively. |
| Key Words:
Insoluble Electrode, Soluble Electrode, Electrolysis, Nickel, Electroless Plating Wastewater |
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