Diffusive gradients in thin films based on banana peel and moringa seeds binding gel disks for in situ measurement of Cd, Cu, Pb and Zn
| Autor: | Lauren Nozomi Marques Yabuki, Milena R. Boniolo, Amauri Antonio Menegário, Marcelo Loureiro Garcia, Karen S. Luko Sulato |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp) |
| Rok vydání: | 2020 |
| Předmět: |
In situ
endocrine system Materials science genetic structures Health Toxicology and Mutagenesis Diffusive gradients in thin films Soil Science moringa seeds 010501 environmental sciences 01 natural sciences River water Analytical Chemistry Moringa chemistry.chemical_compound Environmental Chemistry labile species Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology 010401 analytical chemistry Public Health Environmental and Occupational Health food and beverages Banana peel Acid mine drainage Pollution eye diseases 0104 chemical sciences river water passive sampler chemistry banana peel Agarose sense organs acid mine drainage Nuclear chemistry |
| Zdroj: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 1029-0397 0306-7319 |
| Popis: | Made available in DSpace on 2020-12-10T19:50:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-02-23 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Novel Diffusive Gradients in Thin Films (DGT) binding agents, Musa cavendishi banana peel (BP) and Moringa Oleifera seeds (MOS) immobilised in agarose gel, have been developed and validated for the determination of Cd, Cu, Pb and Zn in waters. The agarose-BP and agarose-MOS gel disks were characterised by Scanning Electron Microscopy, Energy Dispersive X-ray Spectrometry and Porosimetry by nitrogen adsorption. Elution of analytes from the binding agents was successfully performed with 2 mol L-1 HCl. The accumulation of Cd, Cu, Pb and Zn in DGT devices based on agarose-BP and agarose-MOS (DGT-BP and DGT-MOS) agreed well with the theoretical curves predicted by the DGT equation in synthetic solutions (500 mu g L-1 for each analyte). The uptake of DGT-BP and DGT-MOS for Cd, Cu, Pb and Zn was found to be independent of ionic strength of solutions up to 0.005 mol L-1 and for the entire studied pH range (from 3.5 to 8.0). Validation of DGT-BP and DGT-MOS methods was carried out by deploying the devices in spiked river water (the Corumbatai and the Piracicaba river). The recoveries obtained for the natural water matrices ranged between 40% and 150%. DGT-labile concentrations in situ for DGT-BP and DGT-MOS (performed in acid mine drainage) were also consistent with the values measured by conventional DGT-Chelex, albeit DGT-BP had a better binding capacity in acid drainage water. The predictions performed by chemical speciation modelling vMINTEQ were in general agreement for Pb using DGT-MOS (CDGT-MOS/C-dissolved 50% and Pb+2 (MINTEQ) species 41.9%) and for Cu using DGT-BP (CDGT-BP/C-dissolved 55% and Cu-MINTEQ(+2) species 62%). The proposed DGT-BP and DGT-MOS reaffirm the use of residual biomass as binding phase in the DGT technique, featuring low costs in production and 'green' technology approaches. Univ Estadual Paulista Unesp, Inst Geociencias & Ciencias Exatas, Rio Claro, Brazil Univ Estadual Paulista Unesp, Ctr Estudos Ambientais, Rio Claro, Brazil Univ Estadual Paulista Unesp, Inst Geociencias & Ciencias Exatas, Rio Claro, Brazil Univ Estadual Paulista Unesp, Ctr Estudos Ambientais, Rio Claro, Brazil FAPESP: FAPESP -2018/17069-7 FAPESP: FAPESP -2016/14227-5 CNPq: CNPq -304849/2016-2 CNPq: CNPq -403666/2016-3 |
| Databáze: | OpenAIRE |
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