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Structuring alginate/dopamine powder into macroscopic aerogel microsphere for exceptional removal of tetracycline from water: Performance and mechanisms.
- Source :
-
International Journal of Biological Macromolecules . Jul2023:Part 3, Vol. 242, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- Aerogel was selected as one of IUPAC Top Ten Emerging Technologies in Chemistry in 2022, and has attracted tremendous concerns of scientists in removal of emerging contaminants. In this work a novel Fe3+ cross-linked alginate aerogel (SA/DA-Fe3+) with multiple sorption sites were facilely fabricated and applied for highly efficient removal of tetracycline (TC) from water. Results showed that Fe3+ and DA cooperatively improve adsorption of TC and TC was efficiently removed over a broad pH range of 4–8. The kinetics process can be better described by a chemisorption controlled pseudo-second-order kinetics model and Langmuir isotherm equation with characteristics of monolayer coverage. The fitted q max value of TC at ambient temperature was 804.6 mg g−1 higher than those of other reported adsorbents. Multiple interactions including π-π EDA, complexation, hydrogen bonding, electrostatic attraction, etc. were involved in adsorption process. Moreover, SA/DA-Fe3+ aerogel exhibited satisfactory stability, reusability, and recyclability for consecutive applications. Most importantly, after consecutively running for >1000 h with dynamic sorption capacity over 500 mg g−1, the packed-column was still not saturated, manifesting its great potentials for treating actual wastewaters. Thus, above superiorities make SA/DA-Fe3+ a promising candidate adsorbent for treating TC-containing wastewater. • Sodium alginate/dopamine powder was structured into a macroscopic aerogel. • As prepared SA/DA-Fe3+ aerogel showed superhigh sorption capacity for TC. • Fe3+ and DA incorporation synergistically improved adsorption of TC. • Multiple adsorption mechanisms were responsible for enhanced TC uptake. • It exhibited extraordinary sorption performance in fixed-bed column system. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01418130
- Volume :
- 242
- Database :
- Academic Search Index
- Journal :
- International Journal of Biological Macromolecules
- Publication Type :
- Academic Journal
- Accession number :
- 164283449
- Full Text :
- https://doi.org/10.1016/j.ijbiomac.2023.124994