铁电极原位产Fe(Ⅱ)诱导过硫酸盐降解水合肼废水  

Degradation of Hydrazine Hydrate by Persulfate Induced through In-situ Generation of Fe(Ⅱ) on Fe Electrode

作　　者：周振 李慧君 方小军 马文 田歌 张统[1] ZHOU Zhen;LI Huijun;FANG Xiaojun;MA Wen;TIAN Ge;ZHANG Tong(State Key Laboratory of Technologies in Space Cryogenic Propellants,Beijing Special Engineering Design and Research Institute,Beijing 100028,China)

机构地区：[1]北京特种工程设计研究院,航天低温推进剂技术国家重点实验室,北京100028

出　　处：《环境科学与技术》2021年第8期116-123,共8页Environmental Science & Technology

基　　金：国家重点研发计划(2017YFC0806305);水体污染控制与治理科技重大专项(2013ZX07312-001)。

摘　　要：随着中国航天工业的发展,发射过程中产生的水合肼废水对环境的危害逐渐显现。为提高含肼废水的降解效能,该文采用Fe电极活化过硫酸盐降解水合肼废水。研究了Na2S2O8浓度、电流强度和初始pH对水合肼降解率的影响,结果显示,较之铁电极/H_(2)O_(2)体系,相同条件下铁电极/Na2S2O8体系的水合肼降解效率和速率得到提升。其最佳运行条件为:Na2S2O8投加量10 mmol/L、电流强度0.11 A、初始pH=6.5,此时一级动力学反应速率-7.81 h^(-1),30 min水合肼的降解率达到98.6%。With the development of aerospace industry,water contamination caused by hydrazine hydrate released during the launching process has been an environmental issue for decades.In order to strengthen the degradation capacity of hydrazine hydrate,persulfate induced by Fe electrode was employed,factors such as Na2S2O8 dosage,current intensity,and initial pH that affected the degradation capacity of hydrazine hydrate were investigated.This study indicated that compared with H_(2)O_(2)/Fe electrode system,Na2 S2O8/Fe electrode system upgraded the degradation efficiency and the rate of hydrazine hydrate;and that the optimum operation condition was Na2S2O8 dosage 10 mmol/L,current intensity 0.11 A,initial pH 6.5;meantime,degradation kinetics of hydrazine hydrate in Na2S2O8/Fe electrode system fit the first order model with-7.81 h^(-1) reaction rates,and over 98.6%hydrazine hydrate were degraded within 30 min.

关 键 词：水合肼 过硫酸盐 FENTON 电絮凝 

分 类 号：X703[环境科学与工程—环境工程]