Structural modification of humic acids in a barrier discharge plasma

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Аннотация

The paper presents the results of the initiation of chemical transformations of humic acids (HA) in a barrier discharge plasma. The HA were treated with ammonia vapor in the presence of various gaseous media like ethylene, air, oxygen, carbon dioxide, and mixtures of argon. The method of EPR spectroscopy has revealed a decrease in the number of paramagnetic centers after treatment of HA in a barrier discharge. This suggests the recombination of free radicals in their structure. As revealed by IR spectroscopy, the intensity of the band at 1383 cm–1 corresponding to the NO3 group increased when HA were exposed to discharge plasma in air. When HA were treated with ammonia vapor in an argon atmosphere, ammonium humate was formed, which is completely soluble in water.

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Авторлар туралы

N. Yudina

Institute of Petroleum Chemistry of the Siberian Branch of the Russian Academy of Sciences

Хат алмасуға жауапты Автор.
Email: natal@ipc.tsc.ru
Ресей, Tomsk

A. Ryabov

Institute of Petroleum Chemistry of the Siberian Branch of the Russian Academy of Sciences

Email: a.y.ryabov@yandex.ru
Ресей, Tomsk

S. Kudryashov

Institute of Petroleum Chemistry of the Siberian Branch of the Russian Academy of Sciences

Email: ks@ipc.tsc.ru
Ресей, Tomsk

S. Zherebtsov

Federal Research Center of Coal and Coal-Chemistry of Siberian Branch of the Russian Academy of Sciences, Institute of Coal SB RAS

Email: sizh@yandex.ru
Ресей, Kemerovo

K. Votolin

Federal Research Center of Coal and Coal-Chemistry of Siberian Branch of the Russian Academy of Sciences, Institute of Coal SB RAS

Email: kostvot@mail.ru
Ресей, Kemerovo

K. Shpakodrayev

Federal Research Center of Coal and Coal-Chemistry of Siberian Branch of the Russian Academy of Sciences, Institute of Coal SB RAS

Email: shpakodraevkm@mail.ru
Ресей, Kemerovo

N. Malyshenko

Federal Research Center of Coal and Coal-Chemistry of Siberian Branch of the Russian Academy of Sciences, Institute of Coal SB RAS

Email: profkemsc@yandex.ru
Ресей, Kemerovo

Әдебиет тізімі

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Жүктеу
2. Fig. 1. IR spectra: 1 – untreated GC; 2 – GC after barrier discharge in the presence of a mixture of argon with ammonia vapor.

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Метадеректер
3. Fig. 2. IR spectra: 1 – untreated GC; 2 – GC after barrier discharge in the presence of air.

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