Tetracycline adsorption by H3PO4-activated carbon produced from apricot nut shells: A batch study
| Autor: | Mohamad Esmaieli, Hossein Abolghasemi, Mojtaba Hedayati Marzbali, Mostafa Hedayati Marzbali |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Environmental Engineering
Aqueous solution Chromatography General Chemical Engineering Diffusion 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Endothermic process chemistry.chemical_compound Adsorption chemistry Specific surface area medicine Environmental Chemistry 0210 nano-technology Safety Risk Reliability and Quality Mesoporous material Phosphoric acid 0105 earth and related environmental sciences Nuclear chemistry Activated carbon medicine.drug |
| Zdroj: | Process Safety and Environmental Protection. 102:700-709 |
| ISSN: | 0957-5820 |
| Popis: | Tetracycline (TC) batch adsorption was investigated in a synthesized aqueous solution using activated carbon (AC) prepared from apricot shell. The adsorbent was produced via a chemical activation method using phosphoric acid. The specific surface area, total pore volume, and average pore diameter were 307.6 m2 g−1, 0.191 cm3 g−1, and 1.957 nm, respectively. Our analysis revealed that the material produced primarily consisted of mesopores (61.1%). The effect of adsorbent dosage, contact time, initial TC concentration, temperature, and initial pH of the solution on TC adsorption was studied. A thermodynamics analysis revealed that the adsorption process is endothermic and spontaneous. Adsorption isotherms were investigated, and it was shown that the Freundlich model was the best fit for the adsorption equilibrium data. The maximum adsorption capacity of TC onto activated carbon was 308.33 mg g−1, and the adsorption kinetics perfectly matched those of the pseudo-second order model. It was concluded that adsorption of TC is controlled by both intra-particle diffusion and film diffusion mechanisms. The results showed the successful application of synthesized activated carbon for effective removal of TC. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect