Citation: Wei Zhu, Xiaohua Huang, Yi Zhang, Zhonglong Yin, Zhen Yang, Weiben Yang. Renewable molybdate complexes encapsulated in anion exchange resin for selective and durable removal of phosphate[J]. Chinese Chemical Letters, ;2021, 32(11): 3382-3386. doi: 10.1016/j.cclet.2021.04.027 shu

Renewable molybdate complexes encapsulated in anion exchange resin for selective and durable removal of phosphate

School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing Normal University, Nanjing 210046, China

yangzhen@njnu.edu.cn

yangwb007@njnu.edu.cn

Received Date: 11 January 2021
Revised Date: 15 February 2021
Accepted Date: 16 April 2021
Available Online: 22 April 2021

Figures(4)

The existence of many anions in wastewater reduces the removal efficiency of phosphate by adsorbents under realistic conditions. Facing this challenge, the study reports on an insistent and stable composite adsorbent of molybdate complexes Fe-(MoO_x) embedded in a macroporous anion exchange resin (D-201). [Fe(MoO_x)]-D-201 shows 93.7% adsorption capacity (28.3 mg/g) for phosphate even when the molar concentration of coexisting ions is 5 times higher than phosphate. The capacity of adsorbent is maintained more than 84.2% after five regeneration cycles to remove phosphate in the wastewater containing coexisting ions. The ability of highly selective removal of phosphate is maintained during the regeneration cycles explained by the change of the binding of molybdate clusters with phosphate, which is due to the different structures of molybdate clusters depending on various pH. In general, this work puts forward a new idea for the development of phosphorus removal adsorbents for the treatment of wastewater containing coexisting ions.
- Molybdate composite adsorbent,
- Resin,
- Phosphate removal,
- Selective and durable adsorption,
- Structural transformation of complexes
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