Synthesis and application of restricted access material-ion imprinted poly (allylthiourea) for selective separation of Cd2+ and humic acid exclusion

Autor(es)

de Oliveira, Leandro L. G. ^[1] ; Suquila, Fabio A. C. ^[1] ; de Oliveira, Fernanda M. ^[1] ; Scheel, Guilherme L. ^[1] ; Tarley, Cesar R. T. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] State Univ Londrina UEL, Dept Chem, Rodovia Celso Garcia Cid, PR 445, Km 380, BR-86050482 Londrina, PR - Brazil

^[2] Univ Estadual Campinas, Natl Inst Sci & Technol Bioanal INCTBio, UNICAMP, Inst Chem, Dept Analyt Chem, Cidade Univ Zeferino Vaz S-N, BR-13083861 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: REACTIVE & FUNCTIONAL POLYMERS; v. 134, p. 93-103, JAN 2019.
• Citações Web of Science: 4

Resumo

A new restricted access cadmium ion-imprinted poly(allythiourea) was synthesized and evaluated as sorbent for Cd2+ preconcentration with simultaneous exclusion of humic acid (HA). Restricted access medium-ion imprinted polymer was assessed by using the co-monomer 2-hydroxyethyl methacrylate (HEMA) as well as by surface coating with bovine serum albumin (BSA). A set of techniques were used for sorbent characterization including, Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), CHNS/O elemental analysis, Thermogravimetric Analysis (TGA), N-2 physisorption to obtain textural data, swelling effect analysis (SE) and wettability. HP modified with HEMA and HP modified with HEMA-BSA, compared with IIP showed better performance in binding Cd2+ and simultaneous HA exclusion. However, based on relative selectivity coefficient (k'), the selective sorption of Cd2+ and efficient HA exclusion was achieved by using HP-HEMA. The obtained results demonstrate that coating of BSA onto IIP surface is unnecessary for preparing restricted material medium-ion imprinted polymer as well as decreases the selectivity of imprinted polymer. Therefore, the insertion of HEMA in the synthesis of TIP has been the best strategy to obtain a highly selective ion imprinted polymer with restricted access very promising for practical application in the interference-free determination of Cd2+ in natural waters. (AU)

• Processo FAPESP: 14/50867-3 - INCT 2014: Instituto Nacional de Ciência e Tecnologia de Bioanalítica
• Beneficiário: Marco Aurelio Zezzi Arruda
• Modalidade de apoio: Auxílio à Pesquisa - Temático