Great enhancement in phosphate uptake onto lanthanum carbonate grafted microfibrous composite under a low-voltage electrostatic field

Yi Yang, Kok Yuen Koh, Haoxin Huang, Huiping Zhang, Ying Yan, J. Paul Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Removal of phosphorus from water via cost-effective measures becomes important for water industry mainly due to eutrophication in waterbody. In our lab, a novel lanthanum carbonate-microfibrous composite (LC-MC) with good performance was previously synthesized for the removal of phosphorus. In this study, we further improved our technology by applying the electrostatic field (direct current, DC) to the adsorption system. It was showed that the applied DC can greatly improve the adsorption of phosphate in particular the adsorption capacity. Better removal was seen in the pH range of 5–9 at a higher temperature. The maximum adsorption capacity of 47.57 mg-PO43− g−1 was achieved, which was 1.4 times of that operated in the absence of applied DC. The adsorption equilibrium was established at the contact time of 240 min; the adsorption history was well described by the intraparticle surface diffusion model. The negative effect from oxygen-containing anions on the phosphate uptake followed the decreasing sequence of: humic acid > carbonate > nitrate > sulfate; on the other hand, the halogen anions had almost no influence on it. Finally, the mechanism study by XPS, XRD, and IR demonstrated that the ligand exchange played an important role in the electro-assisted phosphate uptake process.

Original languageEnglish
Article number128378
JournalChemosphere
Volume264
DOIs
StatePublished - Feb 2021
Externally publishedYes

Keywords

  • Adsorption kinetics modeling
  • Electro-assisted adsorption
  • Lanthanum carbonate
  • Microfibrous composite
  • Phosphate

Fingerprint

Dive into the research topics of 'Great enhancement in phosphate uptake onto lanthanum carbonate grafted microfibrous composite under a low-voltage electrostatic field'. Together they form a unique fingerprint.

Cite this