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Spectrophotometric analyses of hexahydro-1,3,5-trinitro-1,3,5-triazine(RDX) in water

Journal of Environmental Sciences 2015年第7期27卷 39-44页

作者： Cong Shi Zhonghou Xu Benjamin L.Smolinski per M.arienti Gregory O'Connor Xiaoguang Meng Center for Environmental Systems Stevens Institute of Technology US Army RDECOM-ARDEC

A simple and accurate spectrophotometric method for on-site analysis of royal demolition explosive（RDX） in water samples was developed based on the Berthelot reaction. The sensitivity and accuracy of an existing spectrophotometric method was improved by：replacing toxic chemicals with more stable and safer reagents; optimizing the reagent dose and reaction time; improving color stability; and eliminating the interference from inorganic nitrogen compounds in water samples. Cation and anion exchange resin cartridges were developed and used for sample pretreatment to eliminate the effect of ammonia and nitrate on RDX analyses. The detection limit of the method was determined to be 100 μg/L. The method was used successfully for analysis of RDX in untreated industrial wastewater samples. It can be used for on-site monitoring of RDX in wastewater for early detection of chemical spills and failure of wastewater treatment systems.

关键词： Berthelot reaction Exchange resins RDXS pectrophotometric method Water

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Advanced Oxidation Process for DNAN Using UV/H2O2

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Engineering 2019年第5期5卷 849-854页

作者： Hailei Su Christos Christodoulatos Benjamin Smolinski per arienti Greg O’Connor Xiaoguang Meng Center for Environmental Systems Stevens Institute of TechnologyHobokenNJ 07030USA US Army RDECOM-ARDEC PicatinnyNJ 07806USA

2,4-Dinitroanisole(DNAN)is an important component of insensitive munitions that is anticipated to replace 2,4,6-trinitrotoluene(TNT)in munitions *** hydrogen peroxide(H2O2)oxidation experiments and chemical analyses were conducted to study the effect of initial pH and H2O2 dosage on the kinetics of DNAN decomposition and the reaction *** results show that DNAN degradation followed zero-order kinetics when a 250 ppm DNAN solution was treated with ultraviolet(UV)light and 1500–4500 ppm H2O2 in an initial pH range of 4–***,when the H2O2 concentration was 750 ppm,DNAN degradation followed pseudo-first-order *** results indicate that DNAN can easily be oxidized by UV/H2O2 *** the H2O2 dosage was 1500 ppm and the initial pH was 7,DNAN was reduced from 250 ppm to less than 1 ppm in 3 ***,the total organic carbon(TOC)and total carbon(TC)concentrations were reduced slowly from 100 to less than 70 ppm carbon(C)in 3 h,and decreased to about 5 ppm after 9 h of treatment,suggesting the formation of other organic *** reaction intermediates were oxidized to carbon dioxide(CO2)at a slower rate than the oxidation of ***2 was emitted from the solution because the solution pH decreased rapidly to about 3 during the UV/H2O2 *** of the nitrogen in DNAN was converted to nitrate by UV/H2O2 oxidation after 9 h of *** research results indicate that UV/H2O2 oxidation is a promising technique for the treatment of DNAN in wastewater.

关键词： 2,4-Dinitroanisole Advanced oxidation processes Wastewater treatment Photocatalysis

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