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One-step silanization and amination of lignin and its adsorption of Congo red and Cu(II) ions in aqueous solution.
- Source :
-
International journal of biological macromolecules [Int J Biol Macromol] 2020 Sep 15; Vol. 159, pp. 222-230. Date of Electronic Publication: 2020 May 19. - Publication Year :
- 2020
-
Abstract
- In this work, silanized and aminated lignin (SAL) was synthesized in one step and its adsorption of Congo red and Cu(II) ions in aqueous solution was explored. Lignin was subjected to amine-silanization with (3-aminopropyl) triethoxysilane (APTES). Structural characterization substantiated successful amine-silanzation of lignin and formation of multi-layer APTES intermolecular crosslinked structure. The prepared SAL (nitrogen content = 6.1%) exhibited enhanced molecular weight, thermal stability, and water- and organic solvent-resistance properties. Additionally, the present of the porous structure of particle surface and an increase in the specific surface area and zeta potential promoted the accessibility of contaminants to the effective adsorption sites of SAL. Adsorption experiments showed that both Congo red and Cu(II) ion could be completely removed at original pH value, and their adsorption involved electrostatic attraction and complexation, respectively. The adsorption isotherms and kinetics were well described by the Langmuir and pseudo-second-order equations, respectively. The results showed that SAL is a promising adsorbent for the treatment of effluents.<br /> (Copyright © 2020 Elsevier B.V. All rights reserved.)
- Subjects :
- Adsorption
Amination
Hydrogen-Ion Concentration
Kinetics
Metals, Heavy
Molecular Structure
Molecular Weight
Osmolar Concentration
Propylamines chemistry
Silanes chemistry
Spectroscopy, Fourier Transform Infrared
Thermodynamics
Wastewater chemistry
Water Pollutants, Chemical chemistry
Congo Red chemistry
Copper chemistry
Ions chemistry
Lignin chemistry
Water Purification
Subjects
Details
- Language :
- English
- ISSN :
- 1879-0003
- Volume :
- 159
- Database :
- MEDLINE
- Journal :
- International journal of biological macromolecules
- Publication Type :
- Academic Journal
- Accession number :
- 32416303
- Full Text :
- https://doi.org/10.1016/j.ijbiomac.2020.05.072