Increase of Fluorescence of Humic-Like Substances in Interaction with Cd(II): a Photoinduced Charge Transfer Approach

• Autor(a) principal: Santos, Vinicius S. [UNESP]
• Data de Publicação: 2022
• Outros Autores: Moura, Bernardo R. [UNESP], Metzker, Gustavo [UNESP], Cornélio, Marinonio L. [UNESP], Ferreira, Odair P., Mounier, Stéphane J. L., Hajjoul, Houssam, Boscolo, Maurício [UNESP], Bisinoti, Márcia C. [UNESP], Moreira, Altair B. [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1007/s10895-022-02978-3; http://hdl.handle.net/11449/241927
• topic: Bidimensional analysis; CP/PARAFAC; Fluorescence increase; Humic-like substances; Interaction

Described is the enhancement of fluorescence intensity due to the interaction of a humic-like substance (HLS 1%) extracted from process water (PW) and Cd(II) ions in aqueous solution. Using Canonical Polyadic/Parallel Factor Analysis (CP/PARAFAC), two main components were seen that contributed to fluorescence, the first one increased it and the second one kept it constant in both static and dynamic fluorescence studies. Two-dimensional FTIR analysis indicated that the interaction of HLS 1% and Cd(II) ions occurred in the following order of affinity with the groups: C-O bonds in polysaccharides > C-O bonds in carboxylic acid. The results obtained suggest that the increase in fluorescence intensity and lifetime suggest a photoinduced charge transfer (PCT) between Cd(II) ions and carboxylic acid groups present in HLS 1%. Graphical abstract: [Figure not available: see fulltext.].