| Texto completo | |
| Autor(es): |
Mesa, Ruddy L.
[1]
;
Villa, Javier E. L.
[2, 3]
;
Khan, Sabir
[1, 2, 3]
;
Alves Peixoto, Rafaella R.
[4]
;
Morgano, Marcelo A.
[5]
;
Goncalves, Luis Moreira
[6]
;
Sotomayor, Maria D. P. T.
[2, 3]
;
Picasso, Gino
[1]
Número total de Autores: 8
|
| Afiliação do(s) autor(es): | [1] Natl Univ Engn, Fac Sci, Lab Phys Chem Res, Lima 15333 - Peru
[2] State Univ Sao Paulo UNESP, Inst Chem, BR-14800060 Araraquara, SP - Brazil
[3] Natl Inst Alternat Technol Detect Toxicol Evaluat, BR-14800060 Araraquara, SP - Brazil
[4] Fluminense Fed Univ UFF, Dept Analyt Chem, BR-24020150 Niteroi, RJ - Brazil
[5] Inst Food Technol ITAL, BR-13070178 Campinas, SP - Brazil
[6] Univ Sao Paulo, Inst Chem, BR-05508000 Sao Paulo, SP - Brazil
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | NANOMATERIALS; v. 10, n. 12 DEC 2020. |
| Citações Web of Science: | 0 |
| Resumo | |
Methylmercury (MeHg+) is a mercury species that is very toxic for humans, and its monitoring and sorption from environmental samples of water are a public health concern. In this work, a combination of theory and experiment was used to rationally synthesize an ion-imprinted polymer (IIP) with the aim of the extraction of MeHg+ from samples of water. Interactions among MeHg+ and possible reaction components in the pre-polymerization stage were studied by computational simulation using density functional theory. Accordingly, 2-mercaptobenzimidazole (MBI) and 2-mercaptobenzothiazole (MBT), acrylic acid (AA) and ethanol were predicted as excellent sulfhydryl ligands, a functional monomer and porogenic solvent, respectively. Characterization studies by scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) revealed the obtention of porous materials with specific surface areas of 11 m(2) g(-1) (IIP-MBI-AA) and 5.3 m(2) g(-1) (IIP-MBT-AA). Under optimized conditions, the maximum adsorption capacities were 157 mu g g(-1) (for IIP-MBI-AA) and 457 mu g g(-1) (for IIP-MBT-AA). The IIP-MBT-AA was selected for further experiments and application, and the selectivity coefficients were MeHg+/Hg2+ (0.86), MeHg+/Cd2+ (260), MeHg+/Pb2+ (288) and MeHg+/Zn2+ (1510), highlighting the material's high affinity for MeHg+. The IIP was successfully applied to the sorption of MeHg+ in river and tap water samples at environmentally relevant concentrations. (AU) | |
| Processo FAPESP: | 19/00677-7 - RADes-MIP - preparação e síntese de materiais para desenvolvimento de dispositivos de análise rápida para monitoramento de poluentes emergentes usando polímeros biomiméticos altamente seletivos baseados na tecnologia de impressão molecular |
| Beneficiário: | Maria Del Pilar Taboada Sotomayor |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 14/50945-4 - INCT 2014: Instituto Nacional de Tecnologias Alternativas para Detecção, Avaliação Toxicológica e Remoção de Micropoluentes e Radioativos |
| Beneficiário: | Maria Valnice Boldrin |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 18/14425-7 - Um novo rumo sinérgico para a microextração por difusão gasosa (GDME) fazendo uso de polímeros com impressão molecular (MIPs) |
| Beneficiário: | Luís Francisco Moreira Gonçalves |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |