| Texto completo | |
| Autor(es): |
Costa, Floriatan Santos
;
Moreira, Luana Santos
;
Gonzalez, Mario Henrique
;
Amaral, Clarice D. B.
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | SUSTAINABLE CHEMISTRY AND PHARMACY; v. 49, p. 9-pg., 2026-02-01. |
| Resumo | |
Waste printed circuit boards (WPCB), essential component of electronic devices, comprise a complex matrix of resins and metal alloys, and often contain toxic elements such as lead (Pb). The growing use and accumulation of WPCB has raised concerns due to their environmental impact. This study evaluated alternative and more sustainable solvents for Pb extraction from electronic waste (e-waste), with quantification by flame atomic absorption spectrometry (FAAS). Conventional acid-based extraction methods were adapted using diluted acids and deep eutectic solvents (DES) composed of choline chloride (ChCl) and carboxylic acids. The solvent composition, sample-to-solvent ratio, extraction time, and temperature were systematically optimized using experimental design. The ChCl-oxalic acid and ChCl-formic acid showed promising recoveries (from 95 % to 106 %) and relative standards deviations below 3.5 % under optimized conditions. Detection limits (<5.50 mg kg(-1)) were adequate for the elevated Pb levels typically present in WPCBs. Overall, this study demonstrates that DES-based extractants offer a safe, efficient, and sustainable alternative to conventional methods for Pb extraction from electronic waste matrices, combining high analytical performance with reduced environmental and health risks. (AU) | |
| Processo FAPESP: | 17/18531-3 - Química analítica verde: do preparo de amostras a determinações de elementos-traço por espectrometria de massas com plasma indutivamente acoplado (ICP-MS) |
| Beneficiário: | Mario Henrique Gonzalez |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 19/22113-8 - Solventes eutéticos naturais: síntese, caracterização e aplicações na determinação de As, Cd, Cr, Hg, Se e V em amostras ambientais por ICP-MS |
| Beneficiário: | Mario Henrique Gonzalez |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 21/14759-5 - Solventes e técnicas de extração sustentáveis em química analítica verde para determinação de contaminantes emergentes e inorgânicos em amostras ambientais |
| Beneficiário: | Mario Henrique Gonzalez |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 24/13902-7 - Solventes Eutéticos Profundos (DES): Micro-extrações e Tendências Biotecnológicas Sustentáveis na Determinação de Contaminantes Ambientais |
| Beneficiário: | Mario Henrique Gonzalez |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |