紫外光活化过硫酸钠降解偏二甲肼
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摘要
采用紫外光活化Na_2S_2O_8降解偏二甲肼(UDMH),考察了UDMH初始质量浓度、初始溶液pH、Na_2S_2O_8投加量、常见阴离子(NO_3~-,Cl~-,HCO_3~-)存在对UDMH去除效果的影响。结果表明:随着UDMH初始质量浓度从50 mg/L升至300 mg/L,UDMH降解速率常数由0.182 min~(-1)降至0.015 min~(-1);初始溶液pH为9.0时,UDMH降解速率常数为0.087 min~(-1);随着Na_2S_2O_8投加量的增加,UDMH去除率升高,适宜的Na_2S_2O_8投加量为1.0 mmol/L;分别添加2 mmol/L常见的阴离子(NO_3~-,Cl~-,HCO_3~-)对UDMH降解效果没有明显的影响。
Unsymmetrical dimethylhydrazine(UDMH)was degraded by UV-activated sodium persulfate(Na_2S_2O_8)oxidation. The factores affecting the UDMH removal were investigated. The results showed that:The degradation rate constant of UDMH was reduced from 0.182 min~(-1) to 0.015 min~(-1) when the initial mass concentration of UDMH increased from 50 mg/L to 300 mg/L;The degradation rate constant of UDMH was 0.087 min~(-1) when the initial pH was 9.0;The removal rate of UDMH increased with the increase of Na_2S_2O_8 amount,and the appropriate Na_2S_2O_8 amount was1.0 mmol/L;The addition of 2 mmol/L common anion(NO_3~-,Cl~-,HCO_3~-)had no significant effect on UDMH degradation.
Unsymmetrical dimethylhydrazine(UDMH)was degraded by UV-activated sodium persulfate(Na_2S_2O_8)oxidation. The factores affecting the UDMH removal were investigated. The results showed that:The degradation rate constant of UDMH was reduced from 0.182 min~(-1) to 0.015 min~(-1) when the initial mass concentration of UDMH increased from 50 mg/L to 300 mg/L;The degradation rate constant of UDMH was 0.087 min~(-1) when the initial pH was 9.0;The removal rate of UDMH increased with the increase of Na_2S_2O_8 amount,and the appropriate Na_2S_2O_8 amount was1.0 mmol/L;The addition of 2 mmol/L common anion(NO_3~-,Cl~-,HCO_3~-)had no significant effect on UDMH degradation.
引文
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[2]邓小胜,刘祥萱,刘渊,等.Fenton法降解高浓度偏二甲肼废水的研究[J].环境工程,2015,33(S1):928-931.
[3]贾瑛,李毅,张秋禹.UV-Fenton方法处理偏二甲肼废水[J].含能材料,2009,17(3):365-368.
[4]张淑娟,陈啸剑,吴婉娥,等.微波强化Fenton降解偏二甲肼废水[J].含能材料,2013,21(4):455-459.
[5]王晓晨,张彭义.真空紫外光臭氧降解偏二甲肼的研究[J].环境工程学报,2009,3(1):57-61.
[6]ANTONOPOULOUM,GIANNAKAS A,DELIGIANNAKIS Y,et al. Kinetic and mechanistic investigation of photocatalytic degradation of the N,N-diethyl-m-toluamide[J].ChemEngJ,2013,231(17):314-325.
[7]NIE M,YANG Y,ZHANG Z,et al. Degradation of chloramphenicolbythermallyactivatedpersulfatein aqueous solution[J]. Chem Eng J,2014,246:373-382.
[8]MANOJ P,VARGHESE R,MANOJ V M,et al. Reaction of sulphate radical anion(SO4-·)with cyanuric acid:a potential reaction for its degradation[J]. Chem Lett,2002,31(1):74-75.
[9]孙子为,高乃云,王奕岚,等.紫外激活过硫酸盐降解水中氯霉素的研究[J].中国给水排水,2015(21):124-128.
[10]ROMERO A,SANTOS A,VICENTE F,et al. Diuron abatement using activated persulphate:effect of pH,Fe(Ⅱ)and oxidant dosage.[J]. Chem Eng J,2010,162(1):257-265.
[11]LIANG C,WANG Z S,BRUELL C J. Influence of pH on persulfate oxidation of TCE at ambient temperatures[J]. Chemosphere,2007,66(1):106-113.
[12]LEE Y C,LO S L,KUO J,et al. Persulfate oxidation of per?uorooctanoic acid under the temperatures of20-40℃[J]. Chem Eng J,2012,198/199:27-32.
[13]LIANG C,LEE I L,HSU I Y,et al. Persulfate oxidation of trichloroethylene with and without iron activation in porous media[J]. Chemosphere,2008,70(3):426-435.
[14]高乃云,胡栩豪,邓靖,等.紫外激活过硫酸盐降解水中卡马西平研究[J].华中科技大学学报(自然科学版),2013,41(12):117-122.
[15]郭鑫,马邕文,万金泉,等.基于硫酸根自由基的高级氧化技术深度处理造纸废水的研究[J].中国造纸,2012,31(9):32-37.
[16]ZHANG R,SUN P,BOYER T H,et al. Degradation of pharmaceuticals and metabolite in synthetic human urinebyUV,UV/H2O2,and UV/PDS[J]. Environ Sci Technol,2015,49(5):3056-3066.
[17]HUANG K C,COUTTENYE R A,HOAG G E. Kinetics of heat-assisted persulfate oxidation of methyl tert-butyl ether(MTBE)[J]. J Soil Contam,2002,11(3):447-448.