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- Title
Cadmium Removal from Aqueous Solutions using L-cysteine Functionalized Single-Walled Carbon Nanotubes.
- Authors
Zazouli, Mohammad Ali; Yousefi, ZabihAlla; Taghavi, Mahmoud; Akbari-adergani, Behrouz; Cherati, Jamshid Yazdani
- Abstract
Background and purpose: Cadmium is a very toxic metal that have adverse effects on human health and aquatic environments even at low concentrations, therefore, efforts should be made to eliminate this metal from aquatic ecosystems. The aim of this study was to investigate the efficiency of Lcysteine functionalized single-walled carbon nanotubes (SWCNs) in cadmium removal from aqueous solutions. This study also assessed the role of some parameters such as pH, adsorbent dose, contact time and cadmium concentration. Materials and methods: Single-walled carbon nanotubes were functionalized with L-cysteine. Then the optimum level of pH, carbon nanotubes dose, contact time, and cadmium concentration were determined during the adsorption process. The experimental data were compared with the Langmuir and Freundlich adsorption isotherm models. Results: qe increased when the pH level increased, while contact time and Cd concentration decreased by increasing of the carbon nanotubes dose. The Langmuir adsorption model agreed well with the experimental data (R² = 0.997). Efficiency of removal of Cd by SWCNs was 94.26% in optimal condition. Conclusion: The results showed that L-cysteine functionalized single-walled carbon nanotubes could be effective for the removal of cadmium.
- Subjects
AQUEOUS solutions; CYSTEINE; SINGLE walled carbon nanotubes; CADMIUM poisoning; HEALTH risk assessment; AQUATIC ecology; PHYSIOLOGICAL effects of hydrogen-ion concentration
- Publication
Journal of Mazandaran University of Medical Sciences (JMUMS), 2013, Vol 23, Issue 98, p36
- ISSN
1735-9260
- Publication type
Article