Publication detail

Development and evaluation of the iron oxide-hydroxide based resin gel for the diffusive gradient in thin films technique

SMOLÍKOVÁ, V. PELCOVÁ, P. RIDOŠKOVÁ, A. HEDBÁVNÝ, J. GRMELA, J.

Original Title

Development and evaluation of the iron oxide-hydroxide based resin gel for the diffusive gradient in thin films technique

Type

journal article in Web of Science

Language

English

Original Abstract

An ion-exchange resin Lewatit FO 36 was used for the preparation of a new resin gel for the diffusive gradient in thin films technique (DGT). The DGT method was optimized for the accumulation of four bioavailable arsenic species (As-III, As-V, monomethylarsonic acid, dimethylarsinic acid) in the aquatic environment. The total sorption capacity of Lewatit FO 36 resin gel was 535 mu g As disc(-1). The microwave-assisted extraction in the presence of NaCl (10 g L-1) and NaOH (10 g L-1) was used for the isolation of arsenic species from the Lewatit FO 36 resin gel. The elution efficiency of arsenic was 98.4 +/- 2.0%. Arsenic was determined by the optimized electrothermal atomic absorption spectrometry (ET-AAS) method using palladium modifier, pre-atomization cool-down step and tungsten carbides coating of graphite tube. The Lewatit FO 36 resin gel provides accurate results (c(DGT)/c(SOL) ratio 0.86-1.00) in the pH range 4 -8. No significant influence of experimental conditions was observed in the presence of chlorides (0 -0.5 mol L-1) and humic acid (0-100 mg L-1). Only a very high concentration of phosphates (10 mg L-1) caused a slight decrease in the diffusion coefficients of MMA and As-V species (8.4% and 12.4%, respectively). The presence of iron (0-1 mg L-1) caused a decrease in the diffusion coefficients, but with regard to the common concentrations of iron (less than 0.3 mg L-1), the negative effect was considered not significant for As-III and DMA in natural water. The DGT-ET-AAS method was applied for the determination of bioavailable arsenic species in the spiked river water samples and also in-situ in the water reservoir. The new resin gel was characterized by a homogeneous gel structure with excellent reproducibility (< 5% variation of results between batches) and high sorption capacity which suggests its possible long-term application (up to 286 days in the environment with the arsenic concentration of 100 mu g L-1).

Keywords

Diffusive gradient in thin films technique; Arsenic species; Atomic absorption spectrometry; Aquatic environment

Authors

SMOLÍKOVÁ, V.; PELCOVÁ, P.; RIDOŠKOVÁ, A.; HEDBÁVNÝ, J.; GRMELA, J.

Released

15. 5. 2020

ISBN

0003-2670

Periodical

ANALYTICA CHIMICA ACTA

Year of study

1102

Number

1

State

Kingdom of the Netherlands

Pages from

36

Pages to

45

Pages count

10

URL

https://doi.org/10.1016/j.aca.2019.12.042

BibTex

@article{BUT164110,
  author="Vendula {Smolíková} and Pavlína {Pelcová} and Andrea {Ridošková} and Josef {Hedbávný} and Jan {Grmela}",
  title="Development and evaluation of the iron oxide-hydroxide based resin gel for the diffusive gradient in thin films technique",
  journal="ANALYTICA CHIMICA ACTA",
  year="2020",
  volume="1102",
  number="1",
  pages="36--45",
  doi="10.1016/j.aca.2019.12.042",
  issn="0003-2670",
  url="https://doi.org/10.1016/j.aca.2019.12.042"
}