Detail publikačního výsledku

Hydration and water holding properties of cross-linked lignite humic acids

CIHLÁŘ, Z.; VOJTOVÁ, L.; CONTE, P.; NASIR, S.; KUČERÍK, J.

Original Title

Hydration and water holding properties of cross-linked lignite humic acids

English Title

Hydration and water holding properties of cross-linked lignite humic acids

Type

WoS Article

Original Abstract

In order to stabilize the structure of lignite humic acids and improve the water holding capacity, we applied formaldehyde cross-linking procedure. By combining the 1H NMR relaxometry and methods of thermal analysis, the kinetics and degree of hydration, water distribution and moisture uptake were investigated. Formaldehyde cross-linking of humic acids influenced mainly their physical properties. The thermo-oxidative stability was decreased due to an increase in pore sizes. Spatial polar groups separation increased moisture uptake at higher relative humidity.

English abstract

In order to stabilize the structure of lignite humic acids and improve the water holding capacity, we applied formaldehyde cross-linking procedure. By combining the 1H NMR relaxometry and methods of thermal analysis, the kinetics and degree of hydration, water distribution and moisture uptake were investigated. Formaldehyde cross-linking of humic acids influenced mainly their physical properties. The thermo-oxidative stability was decreased due to an increase in pore sizes. Spatial polar groups separation increased moisture uptake at higher relative humidity.

Keywords

lignite humic acids, cross-linking, hydration, DSC, NMR relaxometry, water molecule bridges

Key words in English

lignite humic acids, cross-linking, hydration, DSC, NMR relaxometry, water molecule bridges

Authors

CIHLÁŘ, Z.; VOJTOVÁ, L.; CONTE, P.; NASIR, S.; KUČERÍK, J.

RIV year

2015

Released

01.10.2014

Publisher

Elsevier

ISBN

0016-7061

Periodical

Geoderma

Volume

230-231

Number

1

State

Kingdom of the Netherlands

Pages from

151

Pages to

160

Pages count

10

URL

https://www.sciencedirect.com/science/article/pii/S001670611400175X

Full text in the Digital Library

http://hdl.handle.net/

BibTex

@article{BUT107447,
  author="Zdeněk {Cihlář} and Lucy {Vojtová} and Pelegrino {Conte} and Saqib {Nasir} and Jiří {Kučerík}",
  title="Hydration and water holding properties of cross-linked lignite humic acids",
  journal="Geoderma",
  year="2014",
  volume="230-231",
  number="1",
  pages="151--160",
  doi="10.1016/j.geoderma.2014.04.018",
  issn="0016-7061",
  url="https://www.sciencedirect.com/science/article/pii/S001670611400175X"
}

Documents

Hydration and water holding properties of cross-linked lignite humic acids