期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 152, 期 -, 页码 77-89出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.02.220
关键词
Adsorption; Chitosan; Polyelectrolyte complex
资金
- CAPES agency
- National Council for Scientific and Technological Development - CNPq [0008678964988973]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]
To obtain pectin-based films is challenging due to the aqueous instability of polyelectrolyte mixtures. We overcome this issue by blending chitosan to pectin of high O-methoxylation degree (56%), followed by solvent evaporation. A durable film containing 74 wt% pectin content was produced and used as an adsorbent material toward Cu(II) ions. Kinetic and adsorption equilibrium studies showed that the pseudo-second-order and Sips isotherm models adjusted well to the experimental data, respectively. Langmuir isotherm indicated a maximum adsorption capacity (q(m)) for Cu(II) removal of 29.20 mg g(-1). Differential scanning calorimetry, contact angle measurements, and X-ray photoelectron spectroscopy confirm the adsorption. The chemisorption plays an essential role in the process; thereby, the film reusability is low. After adsorption, the cytocompatible film/Cu(II) pair prevents the proliferation of Escherichia coli. (C) 2020 Elsevier B.V. All rights reserved.
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