|
| Preparation of Nano-Zero-Valent Iron - Hydroxylapatite Coated Steel Slag and Its Adsorption Properties for Manganese |
|
Received:December 30, 2021
Revised:January 06, 2022
Accepted:January 14, 2022
Published Online:April 12, 2022
|
| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2022.05.013 |
| KeyWord:steel slag; nano-zero-valent iron (nZVI); hydroxylapatite (HAP); manganese; adsorption mechanism |
| Author | Institution |
| LU Qi-yuan |
东华理工大学 水资源与环境工程学院 |
| ZHANG Wei-min |
东华理工大学 水资源与环境工程学院 |
| WANG Yu-gang |
东华理工大学 水资源与环境工程学院 |
|
| Hits: 1429 |
| Download times: 1969 |
| Abstract: |
| Nano-zero-valent iron - hydroxylapatite coated steel slag (S-FH) was prepared by liquid-phase reduction method. Microstructure of Fe0-HAP before and after loaded was analized. Effects of pH value, dosage of S-FH, reaction time, and initial concentration of manganese on adsorption of manganese with S-FH were investigated. The adsorption mechanism was further analyzed using adsorption kinetic model and adsorption isotherm model. The results show that the best adsorption effect is obtained under the conditions including initial concentration of Mn of 5 mg/L, pH value of 5, dosage of S-FH of 0.1 g, and reaction time of 300 min. The adsorption of Mn by S-FH is more consistent with the Freundlich sorption isotherm model (R2>0.98) and quasi-second order kinetic model (R2>0.99). The adsorption mechanism is ion exchange, surface complexation, and dissolution-precipitation. |
| Close |