摘要
随着中国航天工业的不断崛起,航天燃料偏二甲肼所伴生而来的环境影响也更为凸出。为降低推进剂所带来的环境危害,尝试用Fe电极耦合Na_(2)S_(2)O_(8)工艺来提高偏二甲肼废水的去除效率。首先,通过单因素试验研究了对偏二甲肼去除效率影响较大的Na_(2)S_(2)O_(8)与偏二甲肼物质的量之比、溶液初始酸碱度、电流强度及初始偏二甲肼浓度,获得了优化的工艺条件:Na_(2)S_(2)O_(8)与偏二甲肼物质的量之比为1.5、初始pH=7、无外加电流,此时15 min内偏二甲肼的降解率达到98.9%。随后,在最佳工艺条件下使用甲醇和对苯醌进行了自由基捕获试验,结果表明:Fe电极耦合过硫酸盐降解偏二甲肼体系中的主导活性自由基为OH和SO4·-。铁电极耦合过硫酸盐工艺为航天发射中心推进剂废水的现场处置提供了有益探索。
As a conventional propellants,unsymmetrical dimethyl hydrazine's deleterious effect to aqua has stepwise engendered an alarming environmental issue with the growth of aerospace industry in China.To improve degradation efficiency of unsymmetrical dimethyl hydrazine,herein,Fe electrode coupled persulfate process was explored.Firs-tly,single factor test such as Na_(2)S_(2)O_(8)/UDMH mole ratio,initial pH,electric current,and initial UDMH dosage that in-fluenced the decomposition efficiency of UDMH were inspected.The data validated that over 98.9%UDMH were eliminated in the optimum condition within 15 min when the Na_(2)S_(2)O_(8)/UDMH mole ratio=1.5,initial pH=7,and current intensity=0 A.In addition,radical-scavenging test was conducted with the assistant of TBA and MA in the optimal cir-cumstance.It can be conjectured that·OH and SO_(4)were the predominant radicals in the Na_(2)S_(2)O_(8)/Fe electrode system.This strategy provides another solution for propellant wastewater treatment in launch area and may shed light on the deeper understanding of the decomposition mechanism of UDMH.
作者
周振
于亚琴
马文
李慧君
王诚
张统
ZHOU Zhen;YU Yaqin;MA Wen;LI Huijun;WANG Cheng;ZHANG Tong(State Key Laboratory of Technologies in Space Cryogenic Propellants,Beijing Special Engineering Design and Research Institute,Beijing 100028,China;不详)
出处
《工业安全与环保》
2023年第8期88-93,共6页
Industrial Safety and Environmental Protection
基金
国家重点研发计划项目(2017YFC0806305)
水体污染控制与治理科技重大专项(2013ZX07312-001)。
关键词
偏二甲肼
过硫酸盐
FENTON
物种分布
推进剂废水
unsymmetrical dimethylhydrazine
persulfate
Fenton
species distribution
propellant wastewater
