[1]李明,唐益洲,汪鑫龙.电催化氧化处理化学镀镍高氨氮废水[J].中国给水排水,2021,37(23):101-105.
LI Ming,TANG Yi-zhou,WANG Xin-long.Treatment of Electroless Nickel Plating Wastewater with High Ammonia Nitrogen by Electrocatalytic Oxidation[J].China Water & Wastewater,2021,37(23):101-105.
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LI Ming,TANG Yi-zhou,WANG Xin-long.Treatment of Electroless Nickel Plating Wastewater with High Ammonia Nitrogen by Electrocatalytic Oxidation[J].China Water & Wastewater,2021,37(23):101-105.
电催化氧化处理化学镀镍高氨氮废水
中国给水排水[ISSN:1000-4062/CN:12-1073/TU]
卷:
第37卷
期数:
2021年第23期
页码:
101-105
栏目:
出版日期:
2021-12-01
- Title:
- Treatment of Electroless Nickel Plating Wastewater with High Ammonia Nitrogen by Electrocatalytic Oxidation
- Keywords:
- electrocatalytic oxidation; electroless nickel plating; ammonia nitrogen; energy consumption
- 摘要:
- 以电路板行业化学镀镍高氨氮废水为研究对象，采用电催化氧化法对其进行处理，考察pH值、氯化钠投加量、电流密度对废水中氨氮和镍去除效果的影响，并分析反应过程中pH值的变化。结果表明，恒定pH值为8时处理效果最好，氨氮的氧化降解和镍的去除是pH值下降的主要原因；氯化钠投加量越大，氨氮降解速度越快；过高的电流密度反而会造成反应体系中电流效率下降、能耗升高；镍的去除滞后于氨氮的降解，且在氨氮浓度下降后会有一个加速去除的过程；经电催化氧化处理后，废水中的氨氮和镍浓度远低于《电镀污染物排放标准》（GB 21900—2008）表3中的限值，经计算降解1 kg氨氮的能耗仅为38.74 kW·h。
- Abstract:
- Electrocatalytic oxidation was applied to treat electroless nickel plating wastewater with high ammonia nitrogen from the printed circuit board industry.Effects of pH, NaCl dosage and current density on removal efficiency of ammonia nitrogen and nickel from the wastewater were investigated, and the change of pH in the reaction process was analyzed.The best treatment performance was obtained when pH was maintained constantly at 8, and degradation of ammonia nitrogen and removal of nickel were the main reasons for pH decrease. The degradation rate of ammonia nitrogen increased with higher dosage of NaCl.Too high current density would decrease the current efficiency of the reaction system and increase the energy consumption. The removal of nickel lagged behind the degradation of ammonia nitrogen, and there was an accelerated removal process after ammonia nitrogen decreased. After electrocatalytic oxidation treatment, the ammonia nitrogen and nickel concentration in the effluent were lower than the limitations in table 3 specified in Emission Standard of Pollutants for Electroplating(GB 21900-2008), and the energy consumption to degrade 1 kg of NH3-N was only 38.74 kW·h.
更新日期/Last Update:
2021-12-01