Dual-Active-Sites Oriented Mesoporous Zirconia Nanofibers for Enhanced Removal of Phosphate in the Presence of Humic Acid
Excessive phosphate in water will inevitably cause eutrophication. Efficient removal of phosphate is of great significance to inhibit water eutrophication, however, humic acid (HA) in water aggravates the uncertainty of phosphate removal. In this work, mesoporous zirconia nanofiber (MZN) was synthesized and applied as an adsorbent for phosphate removal in the presence of HA. The results showed that MZN had higher adsorption capacity, stronger affinity and faster adsorption rate for phosphate in solution with HA than that without HA. In the presence of HA, HA was adsorbed on MZN through complexation, which introduced carboxyl and hydroxyl groups to MZN surface, increasing phosphate adsorption through hydrogen bonding. The boosted removal mechanism of phosphate can be ascribed to the dual-active-sites effect between the complexation of MZN to phosphate and the hydrogen bonding of the adsorbed HA to phosphate. The adsorption of phosphate by MZN with HA followed the outer-sphere complexation. Column adsorption experiment showed that MZN was feasible and effective for the treatment of phosphate in water containing HA based on the discharge standard of phosphate, and could be reused repeatedly through regeneration. The results indicate that MZN holds a great promise in efficient removal of phosphate in the presence of HA
Year of publication: |
[2022]
|
---|---|
Authors: | Tan, Ping ; Sun, Jiakang ; Li, Yuhan ; Chen, Rouxi |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
Saved in favorites
Similar items by person
-
Factors that have led to the collapse of the Bretton Woods system
Jin, Yueru, (2019)
-
Li, Yuhan, (2020)
-
Customer Concentration, the Relationship Dynamic, and Bank Loan Terms : Evidence from China
Li, Yuhan, (2022)
- More ...