Mechanism of amitriptyline adsorption on Ca-montmorillonite

Authors

Po-Hsiang Chang¹ , Wei-Teh Jiang¹ , Zhaohui Li² , Chung-Yih Kuo³ , Jiin-Shuh Jean¹ , Wan-Ru Chen⁴ , Guocheng Lv⁵

1. Department of Earth Sciences, National Cheng Kung University
2. Geosciences Department, University of Wisconsin – Parkside
3. Department of Public Health, Chung Shan Medical University
4. Department of Environmental Engineering, National Cheng Kung University
5. School of Materials Science and Technology, China University of Geosciences

Conference / event

The 1st International Conference on Emerging Contaminants (EMCON Forum 2013), October 2013 (Kaohsiung, Taiwan)

Poster summary

The uptake of amitriptyline (AMI) from aqueous environment by Ca-montmorillonite (SAz-2) was studied in a batch system under different physicochemical conditions. The adsorbent was characterized by X-ray diffraction and Fourier transform infrared (FTIR) analyses. The AMI adsorption on SAz-2 obeyed the Langmuir isotherm with a capacity of 330 mg/g (1.05 mmol/g) at pH 6–7. The adsorption kinetics was fast, almost reaching equilibrium in 2 h, and followed a pseudo-second-order kinetic model. Desorption of exchangeable cations correlated with the AMI adsorption well, indicating that cation exchange was the major mechanism. The higher adsorption capacity suggested that SAz-2 could be a good candidate to remove AMI from wastewater and would be an important environmental sink for the fate and transport of AMI in soils and groundwater.

Keywords

Amitriptyline, Cation exchange, Intercalation, Montmorillonite, FTIR

Research areas

Environmental Engineering

References

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Funding

No data provided

Supplemental files

No data provided

Additional information

Competing interests

No competing interests were disclosed.

Data availability statement

The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.

Creative Commons license

Copyright © 2023 Chang et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.