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- Title
Preparation of Tannin-immobilized Collagen/Cellulose Bead for Pb(II) Adsorption in Aqueous Solutions.
- Authors
Min Zhang; Cuicui Ding; Lihui Chen; Liulian Huang
- Abstract
Bayberry tannin-immobilized collagen/cellulose bio-adsorbent (BTcollagen/ cellulose) was prepared via the reaction of bayberry tannin with the amino group of collagen in collagen/cellulose blends. Compared with collagen/cellulose beads without tannin, BT-collagen/cellulose had a more compact structure and higher thermal stability. Furthermore, the crystalline structure of cellulose in BT-collagen/cellulose was preserved. The adsorption properties of BT-collagen/cellulose to Pb(II) in aqueous solution were investigated and compared with those of collagen/cellulose. The adsorption of Pb(II) on both of the two bioadsorbents reached the maximum at pH near 5.5. Based on the mass content of collagen, the equilibrium adsorption capacity of BTcollagen/ cellulose at 25 °C was 1.352 mmol/g, according to Langmuir isotherms, which was higher than that of collagen/cellulose (0.345 mmol/g). In kinetics studies, both of the two bio-adsorbents reached equilibrium within ~240 min, and the experimental data could be well fitted by the pseudo-second-order rate model. Nevertheless, BTcollagen/ cellulose had a better reusability after three cycles of adsorption-desorption.
- Subjects
TANNINS; CELLULOSE; LEAD; ADSORPTION (Chemistry); AQUEOUS solutions; MYRICA
- Publication
BioResources, 2015, Vol 10, Issue 1, p1773
- ISSN
1930-2126
- Publication type
Article
- DOI
10.15376/biores.10.1.1773-1789