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Updated: May 18, 2026
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Preparation of Expanded Chitin Foams and their Use in the Removal of Aqueous Copper
Published on: February 27, 2021
Adsorption of Cu(II) from aqueous solution by wine processing waste sludge
Cheng-Chung Liu1, Yue-Ming Chen, Ming-Kuang Wang
1Department of Environmental Engineering, National Ilan University, Ilan, Taiwan, 260. ccliu@niu.edu.tw
Summary
Wine processing waste sludge effectively removes copper from water. Carboxyl groups facilitate this adsorption, following Langmuir and pseudo-second-order models, with a maximum capacity of 14.26 mg/g.
Area of Science:
- Environmental Science
- Materials Science
- Chemical Engineering
Background:
- Wine processing waste sludge (WPWS) is a potential biosorbent for heavy metals.
- Previous studies show WPWS efficacy for Ni, Pb, and Cr removal.
- Copper (Cu) sorption by WPWS remains unexplored.
Purpose of the Study:
- To investigate the sorption mechanism of copper by WPWS.
- To determine the adsorption capacity and kinetics of copper onto WPWS.
- To analyze the thermodynamic parameters of copper sorption.
Main Methods:
- Fourier Transform Infrared (FTIR) spectroscopy to identify functional groups.
- Sorption isotherm studies using the Langmuir model.
- Sorption kinetic studies using the pseudo-second-order model.
- Thermodynamic analysis (Gibbs free energy, enthalpy, entropy).
Main Results:
- Carboxyl groups were identified as the primary functional group responsible for copper sorption.
- The Langmuir model best described the copper sorption isotherms.
- The maximum adsorption capacity (Qm) was determined to be 14.26 mg/g at 50°C.
- Sorption kinetics were accurately described by the pseudo-second-order model.
- Thermodynamic parameters indicated a spontaneous and endothermic sorption process.
Conclusions:
- WPWS is a promising sorbent for copper removal from aqueous solutions.
- The sorption mechanism involves interactions with carboxyl functional groups.
- The process is thermodynamically favorable and follows established adsorption models.
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