期刊
COLD REGIONS SCIENCE AND TECHNOLOGY
卷 192, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.coldregions.2021.103403
关键词
Unfrozen water; H-1 NMR; Copper; Zinc; Bentonite; Clay fraction; Toxicity
资金
- Polish National Science Centre [2017/01/X/ST10/00400]
- Faculty of Environmental, Geomatic and Energy Engineering of Kielce University of Technology [05.0.09.00/2.01.01.00.0000MNSPUBB.IKGO.20.003]
The study found that the type of exchangeable cations significantly affects the unfrozen water content in montmorillonite, and proposed empirical models that can predict the unfrozen water content after ion exchange.
The H-1-NMR method has been applied to study unfrozen water content in three model montmorillonites in their natural state and after ion exchange for Cu2+ or Zn2+ cations, being toxic for the environment. The research indicates statistically significant effect of exchangeable cation type on the variation in unfrozen water content. The proposed empirical models are able to predict the unfrozen water content after the exchange for the Cu2+ or Zn2+ ions using the clay fraction as a soil parameter much better than some of the known models based on the specific surface area and, at the same time, on the specific surface area and the clay fraction.
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