Reduction of dinitrotoluene by hydrated electrons generated from UV irradiation of toluene in wastewater: towards cleaner production

Reduction of dinitrotoluene by hydrated electrons generated from UV irradiation of toluene in wastewater: towards cleaner production


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نویسندگان: امین باقری , محسن سعدانی

کلمات کلیدی: toluenedinitrotoluenehydrated electronreduction processcleaner production

نشریه: 20th Century Music, 237,14,110 - 118,2019

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کد مقاله 66018888
عنوان فارسی مقاله Reduction of dinitrotoluene by hydrated electrons generated from UV irradiation of toluene in wastewater: towards cleaner production
عنوان لاتین مقاله Reduction of dinitrotoluene by hydrated electrons generated from UV irradiation of toluene in wastewater: towards cleaner production
نوع مقاله اصیل پژوهشی - Original Article
نحوه ایندکس شدن مقاله Science Sitation Index Expanded -ISI - Web of Science
IF 6.395
عنوان نشریه 20th Century Music
نوع نشریه خارجی نمایه شده
شماره نشریه 237
دوره 14
صفحه شروع و پایان در نشریه 110 - 118
سال انتشار/ ارائه شمسی 1398
سال انتشار/ارائه میلادی 2019
آدرس لینک مقاله/ همایش در شبکه اینترنت https://www.sciencedirect.com/science/article/pii/S0959652619327271
ISSN 0959-6526
DOI https://doi.org/10.1016/j.jclepro.2019.117857
آدرس علمی (Affiliation) نویسنده متقاضی

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This study presents a sustainable approach for degrading dinitrotoluene to diaminotoluene in wastewater without the production of a secondary pollutant, to achieve cleaner production. This process eliminates the chemical oxygen demand of the pre-treated wastewater and ensures that the treated wastewater is reusable. In this study, the hydrated electron generated from the toluene/UV process at 254 nm in simulated wastewater, and the mechanism of its production were investigated. This mechanism demonstrated that intermediate benzyl radicals can continuously facilitate the generation of hydrated electrons by absorbing two photons during the UV process. In addition, the hydrated electron production via the photolysis of toluene resulted from the triplet state via a biphotonic process. To detect the hydrated electrons in aqueous solution, monochloroacetic acid and chloroethanol were applied. By studying the operating parameters, it was revealed that the hydrated electron generation efficiency was pH dependent, and the complete degradation of dinitrotoluene was achieved at an optimum pH of 7.5. Furthermore, the elimination of the remaining chemical oxygen demand related to the reduction process in simulated wastewater was investigated using heat-activated persulfate; through this advanced oxidation process, the chemical oxygen demand was almost completely eliminated. Depending on the pH and the model solution based on the wastewater composition, the proposed treatment technique, which is novel and environmentally friendly, can be applied to large-scale plants.

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نویسنده نفر چندم مقاله
امین باقریهفتم
محسن سعدانیدوم

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