We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Efficient adsorption of fluoride ions by polyethyleneimine modified diatomite under different conditions in a fixed bed column.
- Authors
Yanzhuo Zhang; Haiqin Zhang; Jing Zhao; Xiaozhuan Zhang; Zhiguo Cao; Binbin Jiang
- Abstract
This study investigated the removal efficiency of fluoride ions (F-) using polyethyleneimine modified diatomite earth (PEI&DT) in a fixed bed column under different conditions. Scanning electron microscopy showed that the PEI&DT had high porosity and thermogravimetric analysis showed that the diatomite was successfully modified by polyethyleneimine (PEI). Adsorption of F- by PEI&DT was measured in the fixed bed column using breakthrough time and saturation time, which increased with increasing bed height, but decreased with increasing F- concentration and flow rate. The Thomas model, which had a very good fit (average = R² > 0.9632), showed that the maximum q0 value was 97.06 mg/g. The Yoon-Nelson model predicted theoretical required times (τtheo) were close to the experimental values (τexp), and the mean error (β) < 9% showed the model was accurate. These results demonstrated that PEI&DT has high potential as an adsorbent for the removal of F- in a fixed bed column.
- Subjects
POLYETHYLENEIMINE; DIATOMACEOUS earth; IONS; ADSORPTION (Chemistry); SCANNING electron microscopy; FLUORIDES
- Publication
Desalination & Water Treatment, 2023, Vol 307, p153
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2023.29906