Effects of additives on 2,4,6-trinitrotoluene (TNT) removal and its mineralization in aqueous solution by gamma irradiation

Lee, Byungjin; Jeong, Seung‐Woo

doi:10.1016/j.jhazmat.2008.10.017

Cited by 22 publications

(7 citation statements)

References 30 publications

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“…Therefore, the Å OH plays a vital role in the PMD degradation. The positive effects of N 2 O and O 2 on the radiolysis of the target pollutants were also reported in other studies on the radiolytic degradation of organic compounds such as chlorpyrifos [28], 4-chloraniline [37], benzene sulfonate [38], 2,4-dichlorophenoxyacetic acid [39] and 2,4, 6-trinitrotoluene [32,40]:…”

Section: Effect Of Solution Ph On Pmd Degradationsupporting

confidence: 72%

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Radiation induced degradation of antiepileptic drug primidone in aqueous solution

Liu

Wang

Zheng

et al. 2015

Chemical Engineering Journal

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Section: Effect Of Solution Ph On Pmd Degradationsupporting

confidence: 72%

“…Due to the bicarbonate ion (HCO 3 À ) slowly reaction with e À aq ðk HCO À 3 =e À aq ¼ 1:0 Â 10 6 M À1 s À1 Þ and Å OH ðk HCO À 3 =e À aq ¼ 8:5Â 10 6 M À1 s À1 Þ and the very small amount of CO 3 ÅÀ , the dose constant slightly decreased with the addition of HCO 3 À anion (Eqs. (38)(39)(40)) [31].…”

Section: Effect Of CLmentioning

confidence: 99%

Radiation induced degradation of antiepileptic drug primidone in aqueous solution

Liu

Wang

Zheng

et al. 2015

Chemical Engineering Journal

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“…TNT is one of the most widely used explosives [1]. During its manufacture, TNT is purified to meet military specifications by the addition of sodium sulfite [2].…”

Section: Introductionmentioning

confidence: 99%

Treatment of TNT Red Water Using Ice Crystallization

Kim

2018

Propellants Explo Pyrotec

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Crystallization of ice from TNT red water was studied using a scraped unit. Growth rate, crystal size distribution, and median particle size of ice crystals were measured. The effect of subcooling, temperature, growth rate, and crystal size on the treatment of red water was investigated. The relationship between ice crystal growth rate and effective distribution coefficient was correlated. From the plot of ice growth rate against subcooling degree, the order of the growth kinetic was in the range of 1.2 to 2.0 for various concentrations. The purity of ice crystals increased with increasing amounts of partial melt. Above 99 % of dinitrotoluene sulfonates in red water were removed after crystallization at a cooling rate of 1.0 K/min, a final crystallization temperature of −10 °C, and a yield of 50 %. The purity of ice crystal was significantly affected by the subcooling degree. Finally, it was shown that TNT red water of 9800 mg/L COD can be treated to provide water of 54 mg/L COD by scraped ice crystallization at a yield of 50 %.

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“…고도산화공정을 활 용한 용액 속의 TNT 분해는 서로 다른 종류의 철을 함유 한 광물들과 과산화수소를 활용하는 펜톤 분해 (Ayoub et al, 2011;Matta et al, 2007), UV와 펜톤반응을 결합한 분 해 (Chen et al, 2005;Li et al, 1998), 광에너지와 펜톤반 응을 결합한 분해 (Liou et al, 2004), UV와 과산화수소를 이용한 분해 (Kwon et al, 2010), TiO2 촉매가 포함된 용액에 과산화수소를 넣고 자외선을 조사하는 분해 (Dillert et al, 1996;Shin and Kim, 2002;Son et al, 2004), 그리고 오존 혹은 오존과 UV를 결합한 분해 (Chen et al, 2007), 초음파 를 활용한 분해 (Hoffmann et al, 1996), 감마선을 이용한 분해 (Lee and Jeong, 2009;Lee and Lee, 2005 Fig. 1(a)).…”

Section: Introduction 1)unclassified

A Study on the Degradation Properties of Aqueous Trinitrotoluene by Palladium Catalyst and Formic Acid

Jeong

Choi²,

Park³

et al. 2015

Journal of Korean Society on Water Environment

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Various methods to degrade explosives efficiently in natural soil and water that include trinitrotoluene (TNT) have been studied. In this study, TNT in water was degraded by reduction with palladium (Pd) catalyst impregnated onto alumina (henceforth Pd-Al catalyst) and formic acid. The degradation of TNT was faster when the temperature of water was high, and the initial TNT concentration, pH, and ion concentration in water were low. The amounts of Pd-Al catalyst and formic acid were also important for TNT degradation in water. According to the experimental results, the degradation constant of TNT with unit mass of Pd-Al catalyst was 8.37 min -1 g -1 . The degradation constant of TNT was higher than the results of previous studies which used zero valent iron. 2,6-diamino-4-nitrotoluene and 2-amino-4,6-dinitrotoluene were detected as by-products of TNT degradation showing that TNT was reduced. The by-products of TNT were also completely degraded after reaction when both Pd-Al catalyst and formic acid existed. Even though there are several challenges of Pd-Al catalyst (e.g., deactivation, poisoning, leaching, etc.), the results of this study show that TNT degradation by Pd-Al catalyst and formic acid is a promising technique to remediate explosive contaminated water and soil.

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Effects of additives on 2,4,6-trinitrotoluene (TNT) removal and its mineralization in aqueous solution by gamma irradiation

Cited by 22 publications

References 30 publications

Radiation induced degradation of antiepileptic drug primidone in aqueous solution

Radiation induced degradation of antiepileptic drug primidone in aqueous solution

Treatment of TNT Red Water Using Ice Crystallization

A Study on the Degradation Properties of Aqueous Trinitrotoluene by Palladium Catalyst and Formic Acid

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