Пожалуйста, используйте этот идентификатор, чтобы цитировать или ссылаться на этот ресурс:
http://elar.urfu.ru/handle/10995/27416
Название: | Spin labeling ESR investigation of the molecular environment of soil interacting with chemical organic contaminants |
Авторы: | Aleksandrova, O. N. |
Дата публикации: | 2013 |
Библиографическое описание: | Aleksandrova O. N. Spin labeling ESR investigation of the molecular environment of soil interacting with chemical organic contaminants / O. N. Aleksandrova // Journal of Geochemical Exploration. — 2013. — Vol. 129. — P. 6-13. |
Аннотация: | This manuscript elucidates the influence of special functional groups of organic xenobiotic chemicals on partly simultaneous molecular binding mechanisms. Organic xenobiotics are released as contaminants into the environment and are partially bound to soil constituents, such as humic substances (HS) and the mineral phase. The interaction of chemical contaminants with HS of soil was investigated using a labeling technique of soil samples with stable nitroxide radicals as model contaminants. These nitroxide radicals only differed in one functionality, a hydroxy or an amino functional group. Electron spin resonance (ESR) analyses of contaminated soil samples showed that the interaction was a multistage process that comprised an initial increase in the concentration of free organic radicals of soil influenced by contaminants with hydroxy or amino functionality, a decrease in the polarity of the molecular environment of soil, and a change in mobility of contaminant molecules. Towards the end of interaction, the concentration of free organic radicals usually decreased. Binding of contaminants to soil constituents via specific functionality was revealed detecting a change in their ESR spectra. Basing on the ESR analyses, a two-way exchange of protons' electron pairs between contaminants and HS was hypothesized to interpret the beginning of interaction. © 2013 Elsevier B.V. |
Ключевые слова: | ELECTRON SPIN RESONANCE ANALYSIS HUMIC SUBSTANCES NITROXIDE RADICALS ORGANIC RADICALS ORGANIC XENOBIOTIC CHEMICALS SPIN LABELING ELECTRON SPINS HUMIC SUBSTANCES NITROXIDE RADICALS ORGANIC RADICALS SPIN LABELING BIOCHEMISTRY CONTAMINATION FUNCTIONAL GROUPS GEOLOGIC MODELS IMPURITIES ORGANIC CHEMICALS SOIL POLLUTION SOIL SURVEYS SOILS ELECTRON SPIN RESONANCE SPECTROSCOPY CONCENTRATION (COMPOSITION) ELECTRON SPIN RESONANCE FREE RADICAL HUMIC SUBSTANCE MOLECULAR ANALYSIS ORGANIC POLLUTANT SOIL POLLUTION XENOBIOTICS |
URI: | http://elar.urfu.ru/handle/10995/27416 |
Идентификатор SCOPUS: | 84876706556 |
Идентификатор WOS: | 000339627500003 |
Идентификатор PURE: | 906833 |
ISSN: | 0375-6742 |
DOI: | 10.1016/j.gexplo.2012.12.016 |
Располагается в коллекциях: | Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC |
Файлы этого ресурса:
Файл | Описание | Размер | Формат | |
---|---|---|---|---|
scopus-2013-0568.pdf | 1,01 MB | Adobe PDF | Просмотреть/Открыть |
Все ресурсы в архиве электронных ресурсов защищены авторским правом, все права сохранены.