Eggshell-Derived Copper Calcium Hydroxy Double Salts and Their Activity for Treatment of Highly Polluted Wastewater
Issued Date
2023-12-12
Resource Type
eISSN
24701343
Scopus ID
2-s2.0-85179823013
Journal Title
ACS Omega
Volume
8
Issue
49
Start Page
46663
End Page
46675
Rights Holder(s)
SCOPUS
Bibliographic Citation
ACS Omega Vol.8 No.49 (2023) , 46663-46675
Suggested Citation
Han Y., Trakulmututa J., Amornsakchai T., Boonyuen S., Prigyai N., Smith S.M. Eggshell-Derived Copper Calcium Hydroxy Double Salts and Their Activity for Treatment of Highly Polluted Wastewater. ACS Omega Vol.8 No.49 (2023) , 46663-46675. 46675. doi:10.1021/acsomega.3c05758 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/95567
Title
Eggshell-Derived Copper Calcium Hydroxy Double Salts and Their Activity for Treatment of Highly Polluted Wastewater
Author's Affiliation
Corresponding Author(s)
Other Contributor(s)
Abstract
By using methyl orange (MO) removal as a model reaction, the best temperatures for processing eggshells are 750 °C and above to obtain biobased CaO materials, a raw material for producing CuCa hydroxy double salt (HDS) materials with high efficiency in treatments of highly polluted wastewater (the initial concentration of MO is 500 ppm). Characterization techniques employed in this study include power X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, nitrogen adsorption-desorption analysis, and the colorimetric method, as well as energy-dispersive X-ray, infrared-, and electron spin resonance spectroscopies. Complete MO removal and high chemical oxygen demand (COD) efficiencies (>90%) can be achieved after 3 min treatments of the aqueous MO with the calcined eggshell-derived CuCa HDS materials. The spent, deactivated HDS materials can be regenerated by an acid wash method. The activity of CuCa HDS materials in MO removal is unaffected by eggshell sources, implying that sorting steps may be unnecessary when eggshell food waste (duck, quail, and hen eggshells) is collected to produce biobased CaO. The findings of this study demonstrated that eggshells can be used in place of limestone and could be a more sustainable, renewable, and cost-effective source for material development and other applications.
