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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Rational Design of an Ion-Imprinted Polymer for Aqueous Methylmercury Sorption

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Author(s):
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]
Total Authors: 8
Affiliation:
[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
Total Affiliations: 6
Document type: Journal article
Source: NANOMATERIALS; v. 10, n. 12 DEC 2020.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 19/00677-7 - RADes-MIP - preparation and synthesis of materials for development of rapid analysis devices for monitoring emerging pollutants using highly selective biomimetic polymers based on molecular printing technology
Grantee:Maria Del Pilar Taboada Sotomayor
Support type: Regular Research Grants
FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support type: Research Projects - Thematic Grants
FAPESP's process: 18/14425-7 - A new synergetic path for gas-diffusion microextraction (GDME) making use of molecular imprinted polymers (MIPs)
Grantee:Luís Francisco Moreira Gonçalves
Support type: Research Grants - Young Investigators Grants