(1. 昆明理工大學(xué) 環(huán)境科學(xué)與工程學(xué)院，昆明 650500；
2. 云南省城鄉(xiāng)規(guī)劃設(shè)計研究院，昆明 650228；
3. 云南瑞升煙草技術(shù)(集團)有限公司，昆明 650106)
摘 要: 通過電解-強化微電解耦合法處理模擬含銅廢水，考察不同工藝條件對出水Cu2+殘留濃度的影響，借助電化學(xué)工作站和掃描電子顯微鏡分析銅離子的還原電沉積過程和結(jié)晶過程。結(jié)果表明：電解-強化微電解耦合法處理含銅廢水的最佳工藝條件為電解電壓12 V，pH=4，鐵炭質(zhì)量比為3:1，還原反應(yīng)后出水Cu2+殘留濃度僅為4 μg/L，出水水質(zhì)遠優(yōu)于單獨微電解法和單獨電解法的，強化微電解反應(yīng)施加的外電場能推動銅離子電沉積還原峰向正方向移動，降低反應(yīng)過電位，促進還原反應(yīng)快速進行，同時，外電場的存在使得活性炭表面電沉積的銅晶體顯著細化。
關(guān)鍵字: 重金屬廢水；銅離子；電解-強化微電解；電場
（1. Faculty of Environmental Science and Technology, Kunming University of Science and Technology,
Kunmin 650500, China;
2. Erban and Rural Planning and Design Institute of Yunnan, Kunming 650228, China;
3. Yunnan Reascend Tobacco Technology (Group) Co., Ltd., Kunming 650106, China）
Abstract:The simulated cupric wastewater was treated by electrolysis-enhanced microelectrolysis coupled method. The influence of different processing conditions on residual Cu2+ concentration of effluent was studied, the reductive electrodeposition process and crystalline process of copper ion were analyzed by electrochemical workstation and SEM. The results show that the optimum process conditions of electrolysis-enhanced microelectrolysis coupled method are that the electrolyzing voltages is 12 V, pH is 4, and mass ratio of iron to carbon is 3:1. Residual Cu2+ concentration of effluent is only 4 μg/L, the water quality of effluent is far superior to those of the separate use of microelectrolysis and electrolysis. The external electric field on microelectrolysis padding can make the reduction peak voltage of copper ion move to positive potential, reduce the reactive over voltage, and promote the reduction reaction working quickly. At the same time, the electrodeposited copper crystals on the surface of activated carbon can be refined significantly because of external electric field.
Key words: electrolysis-enhanced microelectrolysis; electric field; copper ion; heavy metal wastewater
