Detail publikace

Complexation of metal ions with solid humic acids, humic colloidal solutions, and humic hydrogel.

KLUČÁKOVÁ, M.

Originální název

Complexation of metal ions with solid humic acids, humic colloidal solutions, and humic hydrogel.

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The complexation kinetics of Co(II), Cu(II), and Ni(II) ions with humic acids is studied in this work. Humic acids were used in three different forms: solid powder, colloidal solution (sol), and hydrogel. The pseudosecond- order rate equation was used as the basic equation for the mathematical description of the complexation kinetics in the humic systems. Three different methods were applied to monitor the concentration changes in studied systems (conductometry, potentiometry, and UV/VIS spectroscopy). The double-linear fit was obtained in all cases. This is an indication that there are two principal types of metal binding sites in humic acids in all used forms. The strongest active centers are probably occupied in the first step, and slower interactions with less preferable binding sites and the rearrangement of formed complex follow in the second step. The values of rate constants were much higher for the first step in all cases. The highest values were obtained for humic sol and Cu(II) ions and the lowest ones for humic solid powder and Ni(II) ions. In general, the complexation rate increased in the following order: humic powder, sol, and hydrogel for all used metal ions and analytical methods.

Klíčová slova

colloid; complexation; humic acids; kinetics; metal ions

Autoři

KLUČÁKOVÁ, M.

Rok RIV

2014

Vydáno

15. 10. 2014

Nakladatel

Mary Ann Liebert, Inc.

ISSN

1092-8758

Periodikum

ENVIRONMENTAL ENGINEERING SCIENCE

Ročník

31

Číslo

11

Stát

Spojené státy americké

Strany od

612

Strany do

620

Strany počet

9

BibTex

@article{BUT109783,
  author="Martina {Klučáková}",
  title="Complexation of metal ions with solid humic acids, humic colloidal solutions, and humic hydrogel.",
  journal="ENVIRONMENTAL ENGINEERING SCIENCE",
  year="2014",
  volume="31",
  number="11",
  pages="612--620",
  doi="10.1089/ees.2013.0487",
  issn="1092-8758"
}