Benzoylthiourea based polymers as new binding agents for diffusive gradients in thin films technique in labile mercury determination in freshwaters

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dc.contributor.authorMarrugo Madrid, Siday
dc.contributor.authorFontàs, Clàudia
dc.contributor.authorKurt, Gülşah
dc.contributor.authorSalazar Camacho, Carlos
dc.contributor.authorGutierrez Mosquera, Harry
dc.contributor.authorMarrugo Negrete, Jose
dc.contributor.authorDíez, Sergi
dc.date.accessioned2023-01-11T08:14:43Z
dc.date.available2023-01-11T08:14:43Z
dc.date.issued2022
dc.departmentSabire Yazıcı Fen Edebiyat Fakültesi
dc.description.abstractIn this study, the diffusive gradient in thin film (DGT) has been developed using three new materials derived from benzoylthiourea (PBTU, BTP1 and BTP2) for the determination of bioavailable mercury (Hg). The efficiency of these DGT devices was compared with the well-established 3-mercaptopropyl functionalized silica gel (3MFS) in laboratory and field conditions. It was found that PBTU lacked of consistency for handling and assembling in the DGT device, whereas the other two polymers provided mechanically stable binding gels and extracted satisfactorily Hg. However, BTP2 showed no correlation between Hg uptake and Hg present in the aqueous solution, and therefore, BTP1 gels was chosen as the binding layer used for DGT technique. The calculated diffusion coefficient of DGT-BTP1 was 4.0 × 10?6 cm 2 s?1 at 25 °C in 0.8 mm thick diffusion layer and 2.3% w/v of material in gel, whereas for DGT-3MFS, the D value was 9.1 × 10?6 cm 2 s?1. Moreover, it was found that neither the pH (range 4.5 – 9.5) nor the ionic strength (range 0.005–0.1 mol L?1) significantly affected the binding behavior of Hg (p > 0.05). Finally, the DGT-BTP1 devices were successfully used for in-situ measurements of Hg in Quito River (Colombia), impacted by artisanal gold mining, and were compared with DGT-3MFS. Results showed a good performance with values of the labile Hg concentration between 5 to 8% of the total Hg in water. This study demonstrates that benzoylthiourea based DGT is a useful tool for in situ monitoring of Hg in freshwaters.
dc.identifier.doi10.1016/j.eti.2022.102911
dc.identifier.endpage-en_US
dc.identifier.issn2352-1864
dc.identifier.issue-en_US
dc.identifier.scopusqualityQ1
dc.identifier.startpage-en_US
dc.identifier.urihttps:/dx.doi.org/10.1016/j.eti.2022.102911
dc.identifier.urihttps://hdl.handle.net/20.500.12451/9871
dc.identifier.volume28en_US
dc.identifier.wosWOS:000884068300001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier B.V.
dc.relation.ispartofEnvironmental Technology and Innovation
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectBenzoylthiourea Derivatives
dc.subjectDiffusive Gradients in Thin Films
dc.subjectMercury
dc.subjectRiver Water
dc.subjectSorption Gels
dc.titleBenzoylthiourea based polymers as new binding agents for diffusive gradients in thin films technique in labile mercury determination in freshwaters
dc.typeArticle

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