Publication detail

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

journal article in Web of Science

Language

en

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

RIV year

2014

Released

01.10.2014

Publisher

Elsevier

ISBN

0016-7061

Periodical

GEODERMA

Year of study

230-231

Number

1

State

NL

Pages from

151

Pages to

160

Pages count

10

URL

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

Documents

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",
  annote="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.",
  address="Elsevier",
  chapter="107447",
  doi="10.1016/j.geoderma.2014.04.018",
  institution="Elsevier",
  number="1",
  volume="230-231",
  year="2014",
  month="october",
  pages="151--160",
  publisher="Elsevier",
  type="journal article in Web of Science"
}