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Copper removal from wastewater by a chitosan-based biodegradable composite

  • Advances in Environmental Biotechnology and Engineering 2018
  • Published:
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Abstract

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 × 80 mm. The highest copper ion removal is 62.5 mg Cu2+ 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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Acknowledgments

Mr. Heriberto Alonso Gómez and Mr. Ricardo Rosas are greatly acknowledged for their assistance in Atomic Absorption Spectrometry and XRD analyses, respectively, at Universidad Autonoma Metropolitana-Iztapalapa. Dr. José D. Sepulveda-Sánchez is also greatly acknowledged for his assistance in EDS and SEM studies. Ms. Claudia Barrera is greatly acknowledged for the diligent proofreading of this paper.

Funding

The authors would like to thank the Secretary of Education, Science Technology, and Innovation of Mexico City (SECTEI) of the Government of Mexico City, for funding Project No. SECTEI/196/2019 and CONACYT for scholarship grants (OVG and MEM).

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Correspondence to Keiko Shirai.

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Responsible editor: Tito Roberto Cadaval Jr

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Velasco-Garduño, O., Martínez, M.E., Gimeno, M. et al. Copper removal from wastewater by a chitosan-based biodegradable composite. Environ Sci Pollut Res 27, 28527–28535 (2020). https://doi.org/10.1007/s11356-019-07560-2

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  • DOI: https://doi.org/10.1007/s11356-019-07560-2

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