Publication detail

Methylation of humic acids - the impact on the reactivity studied by diffusion techniques

SMILEK, J. SEDLÁČEK, P. KLUČÁKOVÁ, M. KALINA, M. ENEV, V.

Original Title

Methylation of humic acids - the impact on the reactivity studied by diffusion techniques

English Title

Methylation of humic acids - the impact on the reactivity studied by diffusion techniques

Type

conference paper

Language

en

Original Abstract

The diffusion cell technique processes of chosen ionic compounds (basic organic dyes –Rhodamine 6G) was studied in supported hydrogel matrix for the study on reactivity of humic acids (standard samples of humic acids – International Humic Substances Society – Leonardite). The reactivity of humic acids was studied by interactions with basic organic dyes by the simple diffusion techniques realized in the diffusion cell. The rate of interactions of humic acids with chosen organic dye was compared by fundamental diffusion parameters such as the lag time (time needed for penetration of organic dye through hydrogel sample), the sorption capacity of humic acids and the effective diffusion coefficients. The reactivity of humic acids especially sorption capacity is strongly dependent on the amount of carboxylic groups. The influence of carboxylic groups was modified by methylation. Carboxylic groups became occupied by methyl groups during methylation, so the sorption capacity and the total reactivity of these humic acids should be lower.

English abstract

The diffusion cell technique processes of chosen ionic compounds (basic organic dyes –Rhodamine 6G) was studied in supported hydrogel matrix for the study on reactivity of humic acids (standard samples of humic acids – International Humic Substances Society – Leonardite). The reactivity of humic acids was studied by interactions with basic organic dyes by the simple diffusion techniques realized in the diffusion cell. The rate of interactions of humic acids with chosen organic dye was compared by fundamental diffusion parameters such as the lag time (time needed for penetration of organic dye through hydrogel sample), the sorption capacity of humic acids and the effective diffusion coefficients. The reactivity of humic acids especially sorption capacity is strongly dependent on the amount of carboxylic groups. The influence of carboxylic groups was modified by methylation. Carboxylic groups became occupied by methyl groups during methylation, so the sorption capacity and the total reactivity of these humic acids should be lower.

Keywords

humic acids, methylation, diffusion, reactivity, hydrogels

RIV year

2014

Released

03.06.2014

Publisher

Masarykova univerzita

Location

Brno

ISBN

978-80-210-6842-1

Book

XIV. pracovní setkání fyzikálních chemiků a elektrochemiků - Sborník příspěvků

Pages from

137

Pages to

141

Pages count

5

Documents

BibTex


@inproceedings{BUT107775,
  author="Jiří {Smilek} and Petr {Sedláček} and Martina {Klučáková} and Michal {Kalina} and Vojtěch {Enev}",
  title="Methylation of humic acids - the impact on the reactivity studied by diffusion techniques",
  annote="The diffusion cell technique processes of chosen ionic compounds (basic organic dyes –Rhodamine 6G) was studied in supported hydrogel matrix for the study on reactivity of humic acids (standard samples of humic acids – International Humic Substances Society – Leonardite). The reactivity of humic acids was studied by interactions with basic organic dyes by the simple diffusion techniques realized in the diffusion cell. The rate of interactions of humic acids with chosen organic dye was compared by fundamental diffusion parameters such as the lag time (time needed for penetration of organic dye through hydrogel sample), the sorption capacity of humic acids and the effective diffusion coefficients. The reactivity of humic acids especially sorption capacity is strongly dependent on the amount of carboxylic groups. The influence of carboxylic groups was modified by methylation. Carboxylic groups became occupied by methyl groups during methylation, so the sorption capacity and the total reactivity of these humic acids should be lower.",
  address="Masarykova univerzita",
  booktitle="XIV. pracovní setkání fyzikálních chemiků a elektrochemiků - Sborník příspěvků",
  chapter="107775",
  howpublished="electronic, physical medium",
  institution="Masarykova univerzita",
  year="2014",
  month="june",
  pages="137--141",
  publisher="Masarykova univerzita",
  type="conference paper"
}