BDD电极电化学氧化处理高COD、高氨氮火炸药废水的最佳工艺参数  

The Optimal Process Parameters of Electrochemical Oxidation of Explosive Wastewater with High COD and Ammonia Nitrogen via BDD Electrode

作　　者：洪小帆 王兵[1] 熊鹰[1,2] HONG Xiaofan;WANG Bing;XIONG Ying(School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;State Key Laboratory for Environmental-friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)

机构地区：[1]西南科技大学材料与化学学院,四川绵阳621010 [2]西南科技大学环境友好能源材料国家重点实验室,四川绵阳621010

出　　处：《西南科技大学学报》2023年第1期15-21,60,共8页Journal of Southwest University of Science and Technology

基　　金：国防科工委重点基础研究项目(JCKY2019404D002)。

摘　　要：为处理火炸药制造过程中产生的高COD、高氨氮废水,用掺硼金刚石(Boron-doped diamond,BDD)做阳极,通过电化学氧化处理,探究电流密度(40~80 mA/cm^(2))、氯化钠添加量(0.5~4.0 g/L)和pH值(2~11)对火炸药废水的COD、氨氮移除及其动力学常数的影响。结果表明,电流越大,COD与氨氮移除的动力学常数均随之增大;氯化钠添加量越大,COD动力学常数表现为线性增大,氨氮动力学常数则表现出先增大后稳定的趋势;体系的酸性越强,COD动力学常数越大,相反,体系碱性越强,氨氮动力学常数越大。结合动力学常数的变化趋势,获得了目标溶液的最佳处理参数:在pH=4,NaCl添加量2 g/L,电流密度70 mA/cm^(2)条件下处理6 h,可实现溶液中COD和氨氮的高效移除,移除率分别达到98.70%和95.74%,表明以BDD为电极电化学氧化处理火炸药废水有优良的效果。Using boron-doped diamond(BDD)as anode,electrochemical oxidation treatment technology was utilized to treat the wastewater with high COD and ammonia nitrogen in explosive production process.The effects of current density(40-80 mA/cm^(2)),sodium chloride addition amount(0.5-4.0 g/L)and pH value(2-11)on the removal of COD and ammonia nitrogen from explosive wastewater and their kinetic constants were investigated.The results show that the kinetic constants of COD and ammonia nitrogen removal(k_(COD),k_(NH_(3)-N))both increase with the increase of current.With the increase of sodium chloride addition amount,k_(COD) increases linearly,while k_(NH_(3)-N) increases firstly and then stabilizes.At the same time,the more acidic the system is,the greater the k_(COD) is.On the contrary,the more alkaline the system is,the greater the k_(NH_(3)-N) is.Combined with the variation trend of the kinetic constants,the optimal treatment parameters for the target solution are obtained.Under the condition of pH of 4,NaCl addition of 2 g/L,and current density of 70 mA/cm^(2) for 6h,the effective removal of COD and ammonia nitrogen in the solution can be achived with the removal efficiency of 98.70%and 95.74%respectively,implying that the electrochemical oxidation treatment of explosive wastewater via BDD electrode has excellent effect.

关 键 词：掺硼金刚石电极 电化学氧化技术 火炸药废水 

分 类 号：TQ115[化学工程—无机化工] TQ151