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http://hdl.handle.net/1843/61253| Type: | Artigo de Periódico |
| Title: | Bixin as a new class of biosorbent for Hg²+ removal from aqueous solutions |
| Authors: | Júlia Condé Vieira Mariana Cristine Coelho Diniz Louise Aparecida Mendes Rubén Dario Sinisterra Millán Guilherme Dias Rodrigues Ricardo Mathias Orlando Cláudia Carvalhinho Windmöller |
| Abstract: | In this study, the apocarotenoid bixin was investigated as a potential biosorbent for Hg²+ in aqueous solutions. Bixin was used to form a thin film on an inert support using the drop-coating technique. This film was characterised using ATR-FTIR, SEM, and TGA-DTG techniques. Parameters that influence adsorption, such as pH, temperature, NaCl concentration, salt type, bixin mass, and supports for the bixin film, were evaluated. Using 0.112 mg of a bixin covering on a cellulose filter, the sorbent material was able to remove 75 % of Hg²+ from a 2.0 mL, 0.3 mg g−¹, pH 6.00, 25 °C solution after 180 min of contact. Kinetics studies were carried out between 5 and 1440 min, and the pseudo-first-order adsorption model was applied. Equilibrium isotherm data were analysed, and the best fit was for the non-linear Freundlich model, with an R² of 0.9868, RMSE of 0.37, and maximum sorption capacity of 85.38 mg g−¹ obtained by the Langmuir model. The bixin film was applied in spiked environmental samples (lake and mining effluent), and it achieved 86 % Hg²+ removal. The results show that the bixin film is a suitable alternative for efficiently removing mercury from various aqueous systems. This introduces a new class of biosorbent based on apocarotenoids, which are sustainable, low cost, nontoxic, and easily obtainable. |
| Subject: | Química analítica Quimica ambiental Sorventes Adsorção Mercúrio Metais pesados Carotenoides Urucuzeiro Biomoléculas |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE QUÍMICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1016/j.enmm.2020.100407 |
| URI: | http://hdl.handle.net/1843/61253 |
| Issue Date: | May-2021 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S2215153220303901 |
| metadata.dc.relation.ispartof: | Environmental Nanotechnology, Monitoring & Management |
| Appears in Collections: | Artigo de Periódico |
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