LIUYang,ZHAODan,LIDa-peng,et al.Modification of Anthracite by MgFe-LDHs for Sb(Ⅴ) Removal[J].China Water & Wastewater,2022,38(7):90-96.
Modification of Anthracite by MgFe-LDHs for Sb(Ⅴ) Removal
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第7期
Page:
90-96
Column:
Date of publication:
2022-04-01
- Keywords:
- anthracite; Sb(Ⅴ); magnesium iron hydrotalcite-like compound(MgFe-LDHs); modification; adsorption performance
- Abstract:
- Magnesium iron hydrotalcite-like compounds were synthesized in situ by alkaline hydrothermal coprecipitation method for modification of anthracite(Anthr/MgFe-LDHs) to improve the Sb(Ⅴ) adsorption performance of anthracite. The products were characterized by scanning electron microscopy (SEM), X-ray diffractometer (XRD) and Fourier fransform infrared spectrometer (FTIR), and the adsorption performance of Anthr/MgFe-LDHs for Sb(Ⅴ) was investigated. Anthr/MgFe-LDHs had the best adsorption performance for Sb(Ⅴ) when the molar ratio of magnesium and iron was 2∶1, and the maximum adsorption capacity was 6.77 mg/g. With the increase of pH, the removal efficiency of Sb(Ⅴ) decreased gradually when the pH of aqueous solution was in the range of 5-11. The thermodynamic parameters showed that the adsorption of Sb(Ⅴ) by Anthr/MgFe-LDHs was a spontaneous endothermic process, and the adsorption mechanism conformed to Langmuir model and quasi?second?order kinetic equation. After four cycles of adsorption and desorption, Anthr/MgFe-LDHs still had a high Sb(Ⅴ) removal efficiency that was close to 80%, indicating that it has a promising application prospect.
Last Update:
2022-04-01