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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F20%3A43917205" target="_blank" >RIV/62156489:43210/20:43917205 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/20:PU136566

Výsledek na webu

<a href="https://doi.org/10.1016/j.aca.2019.12.042" target="_blank" >https://doi.org/10.1016/j.aca.2019.12.042</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.aca.2019.12.042" target="_blank" >10.1016/j.aca.2019.12.042</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 (AsIII, AsV, monomethylarsonic acid, dimethylarsinic acid) in the aquatic environment. The total sorption capacity of Lewatit FO 36 resin gel was 535 μg As discMINUS SIGN 1. The microwave-assisted extraction in the presence of NaCl (10 g LMINUS SIGN 1) and NaOH (10 g LMINUS SIGN 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 (cDGT/cSOL 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 LMINUS SIGN 1) and humic acid (0-100 mg LMINUS SIGN 1). Only a very high concentration of phosphates (10 mg LMINUS SIGN 1) caused a slight decrease in the diffusion coefficients of MMA and AsV species (8.4% and 12.4%, respectively). The presence of iron (0-1 mg LMINUS SIGN 1) caused a decrease in the diffusion coefficients, but with regard to the common concentrations of iron (less than 0.3 mg LMINUS SIGN 1), the negative effect was considered not significant for AsIII 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 (&lt; 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 μg LMINUS SIGN 1).

Název v anglickém jazyce

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

Popis výsledku anglicky

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 (AsIII, AsV, monomethylarsonic acid, dimethylarsinic acid) in the aquatic environment. The total sorption capacity of Lewatit FO 36 resin gel was 535 μg As discMINUS SIGN 1. The microwave-assisted extraction in the presence of NaCl (10 g LMINUS SIGN 1) and NaOH (10 g LMINUS SIGN 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 (cDGT/cSOL 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 LMINUS SIGN 1) and humic acid (0-100 mg LMINUS SIGN 1). Only a very high concentration of phosphates (10 mg LMINUS SIGN 1) caused a slight decrease in the diffusion coefficients of MMA and AsV species (8.4% and 12.4%, respectively). The presence of iron (0-1 mg LMINUS SIGN 1) caused a decrease in the diffusion coefficients, but with regard to the common concentrations of iron (less than 0.3 mg LMINUS SIGN 1), the negative effect was considered not significant for AsIII 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 (&lt; 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 μg LMINUS SIGN 1).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Analytica Chimica Acta

ISSN

0003-2670

e-ISSN

—

Svazek periodika

1102

Číslo periodika v rámci svazku

15 March

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

36-45

Kód UT WoS článku

000512982100004

EID výsledku v databázi Scopus

2-s2.0-85076847820