氯盐介导的铁电极活化过硫酸盐降解水合肼废水  

Degradation of hydrazine hydrate via persulfate activated by Fe electrode in Chloride media

作　　者：周振 李慧君 马文 方小军 张星 张统[1] ZHOU Zhen;LI Huijun;MA Wen;FANG Xiaojun;ZHANG Xing;ZHANG Tong(State Key Laboratory of Technologies in Space Cryogenic PropeUants,Beijing Special Engineering Design and Research Institute,Beijing 100028,China;Unit 91292 of PLA,Baoding 074000,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 [2]解放军91292部队,保定074000

出　　处：《给水排水》2022年第6期84-91,共8页Water & Wastewater Engineering

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

摘　　要：为减缓水合肼废水对环境的危害,在氯盐介导的环境下,采用铁电极激活过硫酸盐降解水合肼废水。研究了电流强度、Na_(2)S_(2)O_(8)与水合肼的摩尔比、NaCl背景离子强度、初始pH及初始水合肼浓度对水合肼降解率的影响,通过参数优化,获得了最佳运行条件:电流强度0.11 A、Na_(2)S_(2)O_(8)与水合肼的摩尔比2.5、初始pH=6.5、NaCl背景离子强度50 mM,此时30 min水合肼的降解率达到99.5%。活性自由基猝灭试验显示,·OH和·SO_(4)^(-)参与了该过程中水合肼的降解,且主导活性自由基是·OH。To relieve the detrimental effect of hydrazine hydrate to circumstance,persulfate activated by Fe electrode in chloride media was utilized.Herein,current intensity,Na_(2)S_(2)O_(8) dosage,NaCl concentration,initial pH,and hydrazine hydrate which affect degradation capacity were explored.Up to 99.5% hydrazine hydrate were removed in an optimal operating condition(current intensity=0.11 A,molar ratio of Na_(2)S_(2)O_(8) to hydrazine hydrate=2.5,NaCl concentration=50 mM,initial pH=6.5)within 30 min.As evidenced by radical-scavenging test,·OH and·SO_(4)^(-) played a part in the hydrazine hydrate degradation and·OH was the predominant participation.

关 键 词：过硫酸盐 水合肼 电絮凝 物种分布 

分 类 号：X703[环境科学与工程—环境工程]