Su, L-cysteine functionalized gold nanoparticles for the colorimetric detection of Hg 2+ induced by ultraviolet light. Dissertation, Universidade Federal de Minas Geraisį. WAD J,(2010) Especiação, Quantificação, Distribuição e Transporte de Mercúrio em Solos Contaminados do Município de Descoberto, Belo Horizonte. Thesis, Universidade Federal de São Paulo Ministério do Meio Ambienteįarias L.A (2006) Avaliação do Conteúdo de Mercúrio, Metilmercúrio e Outros Elementos de Interesse em Peixes e em Amostras de Cabelos e Dietas de Pré-Escolares da Região Amazônica. Accessed 10 August 2020īRASIL (2013) Diagnóstico Preliminar sobre o Mercúrio no Brasil. UNEP (2019) Minamata Convention on Mercury. The low LOD demonstrates its potential for Hg 2+ quantification in environmental samples such as fish, soil, and effluent discharge. The fast, simple and low-cost method is based on changes in the AgNP surface plasmon resonance band ( λ ≈ 410 nm) with LOD 6.5 ng/mL (32.5 nM), without functionalization of the AgNPs. AgNPs are used as a Hg 2+ sensor with high sensitivity and selectivity. They were monodispersed and stable for up to 180 days. The AgNps presented an average diameter of 15 nm and a zeta potential value of ~ − 28 mV. The AgNPs were characterized by UV–Vis spectroscopy, fluorescence, Fourier transform infrared, dynamic light scattering analysis and transmission electron microscopy. The components of the extract as tannins and polyphenolic compounds were responsible for the reduction in metal ions and the particles encapsulation. The AgNPs were obtained with the aqueous extract of Mimusops coriacea leaves. In the presented manuscript, spherical silver nanoparticles (AgNPs) which were prepared via green chemical method in a single step take only a few minutes to be ready as a Hg 2+ ions detector based on the plasmon band changes.
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