“芬顿+重捕剂”组合工艺处理电镀化镍废水效能研究  

Study on the"Fenton+Recapter"Combined Process for Treating Electroplating Nickel Wastewater

作　　者：韩琦 陈晓丹 王小江 王宏杰 顾玉蓉 HAN Qi;CHEN Xiaodan;WANG Xiaojiang;WANG Hongjie;GU Yurong(Shenzhen Academy of Environmental Sciences,Shenzhen 518001,China;Harbin Institute of Technology Shenzhen Graduate School,School of Civil and Environment Engineering,Shenzhen,518055,China;Shenzhen Polytechnic,Shenzhen 518055,China)

机构地区：[1]深圳市环境科学研究院,广东深圳518001 [2]哈尔滨工业大学(深圳),土木与环境工程学院,广东深圳518055 [3]深圳职业技术学院,广东深圳518055

出　　处：《水处理技术》2024年第6期97-101,107,共6页Technology of Water Treatment

基　　金：深圳市科技计划资助(JCYJ20220531091403007,JCYJ20220531094416037);国家自然科学基金(42107396)。

摘　　要：为考察“芬顿+重捕剂”组合工艺对电镀化镍废水的处理效能,利用小试试验对市场上五种二硫代氨基甲酸盐类(DTC类)重捕剂进行比选,并在对单独芬顿工艺优化基础上,对组合工艺进行实际化镍废水达标处理和成本分析,确定组合工艺的最佳契合点。试验结果表明,DTC-2为较适宜的重捕剂,具有pH适应范围广(3.0~11.0)、抗干扰性强、去除Ni速度快、处理成本低(1.20元/t)等优点。确定了单独芬顿工艺中Fe^(2+)/H_(2)O_(2)较优的投加摩尔比为0.8,此时破络效果最好,络合Ni的去除率高达98.5%。组合工艺参数优化表明,当处理芬顿出水中络合Ni剩余质量浓度为0.2、0.3、0.5、0.7、1.0、1.5 mg/L时,重捕剂DTC-2(1%)投药量分别为0.08、0.19、0.5、1.25、7.5、25 mL/L,废水均能达标排放(络合Ni浓度≤0.1 mg/L)。“芬顿+重捕剂”组合工艺最佳契合方案为先芬顿处理化镍废水至剩余Ni含量为1.0 mg/L左右,再利用重捕剂DTC-2捕集去除至达标排放,此时组合工艺的处理成本最低(7.79元/t)。The aim of this work was to investigate the"Fenton+Recapter"combined process for treating electroplating nickel wastewater.Firstly,five commonly used dithiocarbamate heavy recapture agents(DTC types)were compared and selected through trial tests.Then,the optimization of the sole Fenton process was carried out,including the dosing molar ratio of Fe^(2+)/H_(2)O_(2),the dosage of H_(2)O_(2) and the reaction time.At last,the combined process was simulated to meet the nickel wastewater treatment standards and cost analysis was conducted to determine the optimal fit point of the combined process.The experimental results showed that DTC-2 was a more suitable heavy recapture agent,with advantages such as a wide pH adaptation range(3.0~11.0),strong anti-interference,fast Ni removal efficiency,and low cost(1.20¥/t).The optimal molar ratio of Fe^(2+)/H_(2)O_(2) in the sole Fenton process was determined to be 0.8,which resulted in the best breaking effect and a 98.5% removal of complex Ni.The optimization of the combined process parameters showed that when the dosage of heavy recapture agent DTC-2(1%)was 0.08,0.19,0.5,1.25,7.5 and 25 mL/L respectively,and the residual concentration of complex Ni in Fenton effluent was 0.2,0.3,0.5,0.7,1.0 and 1.5 mg/L,the wastewater could meet the discharge standards(complex Ni concentration≤0.1 mg/L).The best fit for the"Fenton+Recapter"combined process was to first treat nickel wastewater with Fenton until the concentration of Ni in the effluent was about 1.0 mg/L,and then use DTC-2 to capture and remove Ni until it meets the standard discharge.Under these conditions,the treatment cost of the combined process was the lowest(7.79¥/t).

关 键 词：电镀化镍废水 DTC类重捕剂 芬顿工艺 组合工艺 达标排放 

分 类 号：X781.1[环境科学与工程—环境工程]