期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 26, 期 28, 页码 28548-28557出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-018-3547-0
关键词
Chitin nanowhiskers; Chitin; Adsorption; Crystal violet; Cationic dye
资金
- CAPES (Coordination for the Improvement of Higher Education Personnel)
- CNPq (National Council for Scientific and Technological Development)
Chitin (Ch) and chitin nanowhiskers (ChNW) were prepared, characterized, and applied as adsorbent to remove crystal violet (CV) dye from aqueous solutions. Ch was obtained from shrimp wastes and submitted to acid hydrolysis in order to find ChNW. The increase in average pore size and the rod-like shape of ChNW were probably the main characteristics which contributed to the increase in adsorption potential, when compared with raw Ch. The adsorbent dosage considered more adequate was 5 g L-1, and the most suitable pH was 8.0. A pseudo-second-order model was adequate to represent the kinetic profile. Sips and Hill models were suitable to fit the equilibrium curves. The maximumadsorption capacity of CVon ChNWwas 59.52 mg g(-1), and the process was endothermic, favorable, and spontaneous. These findings indicated that ChNW have potential to be used as adsorbent in the treatment of colored wastewaters.
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