Cysteine-modified silica resin in DGT samplers for mercury and trace metals assessment

Marek Reichstädter, Yue Gao, Pavel Divis, Tianhui Ma, Camille Gaulier, Martine Leermakers

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4 Citations (Scopus)

Abstract

Diffusive gradients in thin-films (DGT) is an in situ passive sampling technique to assess labile trace metal concentrations in different environmental matrix. The technique is consisting of a diffusive domain backed up by a resin gel that binds free metals and metal complexes that dissociate in the diffusive domain. This technique requires specific resin for special metals, for example mercury (Hg), since the classic resin (Chelex-100) gel is not applicable for Hg measurement. A simultaneous determination of Hg with other metals by the DGT was not yet reported.Two biomolecule-based resins were prepared by glutaraldehyde immobilisation of cysteine onto 3-amino-functionalised silica and 3-aminopropyl-functionalised silica, respectively. The load of functional groups on modified resins was qualitatively and quantitatively characterised. The modified resins were applied in the DGT technique and the uptake efficiency, elution efficiency, and linear accumulation of analytes of the DGT were tested. This novel DGT technique, using two cysteine-modified resins, can accumulate Hg and other metals in a broad range of pH and ionic strength in solutions. In the Belgian coastal zone (BCZ), the concentrations of Hg and other trace metals sampled by cysteine-modified resin-DGTs were similar as those by the other two DGT assemblies for Hg and other trace metals, respectively. The cysteine-modified silica resin combined the features of Chelex-100 resin and 3-mercaptopropyl silica resin and allowed simultaneous determination of labile Hg and other trace metals. The resin with a higher load of functional groups also showed higher performance in the further application in the DGT technique.
Original languageEnglish
Article number128320
Pages (from-to)1-13
Number of pages13
JournalChemosphere
Volume263
Issue number263
DOIs
Publication statusPublished - Jan 2021

Bibliographical note

Funding Information:
We thank Dr. Vojtěch Enev for the DRIFT spectroscopy analysis at BUT. This work was supported by Materials Research Centre at FCH BUT-Sustainability and Development, REG LO1211, with financial support from National Programme for Sustainability I (Ministry of Education, Youth and Sports of Czech Republic) and by funding SPR2 (Tracing and Modelling Past & Present Global Changes) from VUB for the research group of AMGC. We also would like to thank Belspo NewSTHEPS project (BR/143/A2/NEWSTHEPS) for funding to Camille Gaulier, FWOAL911 for funding to Martine Leermakers, Yue Gao and Tianhui Ma.

Funding Information:
We thank Dr. Vojtěch Enev for the DRIFT spectroscopy analysis at BUT. This work was supported by Materials Research Centre at FCH BUT-Sustainability and Development, REG LO1211, with financial support from National Programme for Sustainability I ( Ministry of Education , Youth and Sports of Czech Republic) and by funding SPR2 (Tracing and Modelling Past & Present Global Changes) from VUB for the research group of AMGC . We also would like to thank Belspo NewSTHEPS project (BR/143/A2/NEWSTHEPS) for funding to Camille Gaulier, FWOAL911 for funding to Martine Leermakers, Yue Gao and Tianhui Ma.

Publisher Copyright:
© 2020 Elsevier Ltd

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

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