Abstract
Abstract: Four types of carbonaceous adsorbent materials were applied for the removal of cadmium ions from water. These materials include fly ash (FA), activated carbon (AC), carbon nanofibers (CNFs), and carbon nanotubes (CNTs). The adsorption mechanisms and the kinetics of cadmium (II) removal from water were investigated. The effects of pH, the adsorbent dosage, the contact time, and the agitation speed on the removal process were studied and optimized. The four carbon adsorbents were characterized by field emission scanning electron microscopy and transmission electron microscopy. Adsorption isotherms were used to find the model of the adsorption behavior and to calculate the percentage removal. A 95% removal was obtained by using FA at pH 7, a dosage of 50 mg, a contact time of two hours, and an agitation speed of 150 rpm. In case of CNTs, CNFs, and AC, the percentage removals were found to be 27, 34, and 38%, respectively. The experimental data of the four-based carbon adsorbents were well fitted with Langmuir and Freundlich adsorption models.
| Original language | English |
|---|---|
| Pages (from-to) | 1417-1429 |
| Number of pages | 13 |
| Journal | Desalination and Water Treatment |
| Volume | 53 |
| Issue number | 5 |
| DOIs | |
| State | Published - 30 Jan 2015 |
Bibliographical note
Publisher Copyright:© 2013 Balaban Desalination Publications. All rights reserved.
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 6 Clean Water and Sanitation
Keywords
- Activated carbon
- Cadmium removal
- Carbon fly ash
- Carbon nanofibers
- Carbon nanotubes
ASJC Scopus subject areas
- Water Science and Technology
- Ocean Engineering
- Pollution
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