化学镀镍废水中镍、总磷和氨氮协同处理  

Co-processing of Nickel, Total Phosphorus and Ammonia Nitrogen in Electroless Nickel Plating Wastewater

作　　者：李姗婷 徐文彬 肖勇俊 张艳华 何龙 Li Shanting;Xu Wenbin;Xiao Yongjun;Zhang Yanhua;He Long(Dongjiang Environmental Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]东江环保股份有限公司,广东深圳518000

出　　处：《广东化工》2021年第16期31-33,共3页Guangdong Chemical Industry

基　　金：广东省省级科技计划项目(2018B030323016)。

摘　　要：采用氢氧化钙初步中和联合次氯酸钙深度氧化工艺处理化学镀镍废水,重点研究了氢氧化钙中和终点p H以及次氯酸钙氧化初始p H、氧化反应温度、次氯酸钙用量和氧化反应时间对镍、总磷和氨氮协同处理效果的影响。结果表明,氢氧化钙初步中和优选终点pH=11,次氯酸钙深度氧化工艺优选条件为:氧化初始pH=3、氧化反应温度40℃、次氯酸钙用量20 g/L、氧化反应时间40 min。在优化工艺条件下,出水镍、总磷和氨氮浓度分别为0.04 mg/L、0.48 mg/L和0.93 mg/L,均满足《电镀污染物排放标准》(GB21900-2008)表3要求。Electroless nickel plating wastewater was treated by neutralization with Ca(OH)2, and then deep oxidation with Ca(ClO)2. The effects of neutralization final pH, initial oxidation pH, oxidation temperature, calcium hypochlorite dosage and oxidation time on the concentration of Ni, TP and NH3-N in effluent were studied respectively. The results showed that the optimal reaction conditions for neutralization was final pH=11, and oxidization were initial oxidation at pH=3, oxidation temperature of 40 ℃, calcium hypochlorite dosage of 20 g/L and oxidation time of 40 min. Under optimized conditions, the concentration of Ni, TP and NH3-N in effluent were 0.04 mg/L, 0.48 mg/L and 0.93 mg/L respectively, which met the special discharge limit values of water pollutants specified in Table 3 of the Comprehensive Discharge Standard for Pollutants from Electroplating(GB 21900-2008).

关 键 词：化学镀镍废水 次氯酸钙 镍 总磷 氨氮 协同氧化 

分 类 号：TQ[化学工程]