Effective chromium removal from water by polyaniline-coated electrospun adsorbent membrane

Autor(es)

Dognani, Guilherme ^{[1, 2]} ; Hadi, Pejman ^{[1, 3]} ; Ma, Hongyang ^{[1, 4]} ; Cabrera, Flavio C. ^[2] ; Job, Aldo E. ^[2] ; Agostini, Deuber L. S. ^[2] ; Hsiao, Benjamin S. ^[1]

Afiliação do(s) autor(es)

^[1] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 - USA

^[2] Sao Paulo State Univ UNESP, Sch Technol & Sci, BR-19060900 Presidente Prudente, SP - Brazil

^[3] SUNY Stony Brook, New York State Ctr Clean Water Technol, Stony Brook, NY 11794 - USA

^[4] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029 - Peoples R China

• Tipo de documento: Artigo Científico
• Fonte: CHEMICAL ENGINEERING JOURNAL; v. 372, p. 341-351, SEP 15 2019.
• Citações Web of Science: 6

Resumo

Polyaniline (PAni)-coated polyvinylidenefluoride-co-hexafluoropropilene (PVDF-HFP) nanofibrous membranes were fabricated by electrospinning of PVDF-HFP followed by in-situ polymerization of PAni on the nanofiber surface. The resulting membranes with PAni coating were applied for chromium removal, where the efficiency was evaluated as functions of the pH value and adsorption time. Dynamic adsorption tests were also carried out at different flow rates and volumes of chromium in water. It was found that the PAni coating greatly enhanced the chromium removal efficiency with the maximum adsorption capacity being 15.08 mg/g at pH = 4.5. The desorption study further confirmed the recyclability of the PAni coated PVDF-HFP membrane showing an efficiency over 70% even after 5 cycles of usage. The structure and property relationships of these membranes were also characterized by FTIR spectroscopy, capillary flow porometer, water contact angle, scanning electron microscopy and X-ray photoelectron spectroscopy. (AU)

• Processo FAPESP: 17/03638-7 - Estudo do fluxo, permeabilidade, incrustação e capacidade de remoção de metais em membranas de PVDF com superfície funcionalizada
• Beneficiário: Guilherme Dognani
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 15/21261-2 - Desenvolvimento de pré-filtros de água a partir de membranas eletrofiadas de PVDF com superfície funcionalizada para adsorção do CR6+
• Beneficiário: Guilherme Dognani
• Modalidade de apoio: Bolsas no Brasil - Doutorado