Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 27, Issue 23, Pages 28527-28535Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-019-07560-2
Keywords
Copper; Wastewater; Adsorption; Chitosan; Extrusion; Chitosan-based biocomposite
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Funding
- Consejo Nacional de Ciencia y Tecnologia [001465] Funding Source: Medline
- Consejo Nacional de Ciencia y Tecnología [001465] Funding Source: Medline
- Secretary of Education, Science Technology and Innovation of Mexico City [SECTEI/196/2019] Funding Source: Medline
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This work demonstrates that a biodegradable chitosan-based biocomposite packed in mini-reactors successfully removes copper ions from aqueous solutions. The chitosan is obtained by deacetylation of biological chitin, which is extracted from shrimp wastes by lactic acid fermentation. The polysaccharide is embedded in a biodegradable prepolymer matrix before extrusion to produce porous cylindrical pellets of 2 x 80 mm. The highest copper ion removal is 62.5 mg Cu(2+)per g of the biodegradable adsorbent. Additionally, the adsorption capacity of the material, below its saturation, allows several cycles of reuse with a hydraulic retention time reduction of 1 h. This chitosan-based material is advantageous when compared with other approaches using non-biodegradable materials or costly commercial adsorbents for removing heavy metal ions in wastewater effluents as well as a filter component in water purification devices.
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