Preparation of chitin nanowhiskers and its application for crystal violet dye removal from wastewaters

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 sh...

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Bibliographic Details
Published in:Environmental science and pollution research international 2019-10, Vol.26 (28), p.28548-28557
Main Authors: Druzian, Susanne Pedroso, Zanatta, Natalia Pollon, Côrtes, Letícia Nascimento, Streit, Angélica Fátima Mantelli, Dotto, Guilherme Luiz
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Alternative Adsorbent Materials for Application in Processes Industrial
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Chitin
Chitin - chemistry
Color removal
Coloring Agents - chemistry
Dye industry wastes
Dyes
Earth and Environmental Science
Ecotoxicology
Endothermic reactions
Environment
Environmental Chemistry
Environmental Health
Environmental science
Gentian violet
Gentian Violet - chemistry
Kinetics
Pore size
Porosity
Waste Water - analysis
Waste Water - chemistry
Waste Water Technology
Wastewater treatment
Water Management
Water Pollutants, Chemical - analysis
Water Pollution Control
Water Purification
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Summary: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 maximum adsorption capacity of CV on ChNW was 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.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-018-3547-0