Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 102, Issue -, Pages 232-240Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2017.03.150
Keywords
CCN; Adsorption; Pb(II); Fish sauce; Langmuir isotherm; Kinetics
Funding
- National Natural Science Foundation of China [21476212]
- Funds of the Zhoushan Municipal Bureau of China [2015C41004]
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In the present study, a new adsorbent based on carboxylated cellulose nanocrystal (CCN) was developed for the adsorption of Pb(II) from fish sauce. The prepared adsorbent material was characterized by zeta potential, FT-IR, XRD, and XPS tools. The changes in the morphological structure of the developed CCN surface were evidenced by SEM and TEM. The favorable adsorption conditions were selected by studying the contact time, initial concentration, temperature, and concentration of the used glutamic acid and NaCl. The results indicated that the Langmuir isotherm model agrees very well with experimental adsorption data (R-2 = 0.9962) with a maximum adsorption capacity 232.56 mgig of Pb(II) at 293.2 K. Additionally, data of the adsorption kinetics follow the pseudo-second-order kinetics (R-2 > 0.9990). On the other hand, the thermodynamics studies show that the adsorption process is spontaneous and endothermic. Furthermore, the developed CCN could be regenerated using acid treatment with a good reusability for Pb(II) adsorption. The results clearly indicated that the synthesized CCN could be effectively applied as a new material for Pb(II) adsorption from fish sauce solutions. (C) 2017 Elsevier B.V. All rights reserved.
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