Citation: Chun Cao, Hong-liang Kang, Ping-ping Li, Chao Zhang, Wei-wei Li, Yong Huang, Rui-gang Liu. Adsorption of Fluorinion on Polyacrylamidoxime Decorated Wool and the Mechanism[J]. Acta Polymerica Sinica, ;2016, (4): 486-493. doi: 10.11777/j.issn1000-3304.2016.15246 shu

Adsorption of Fluorinion on Polyacrylamidoxime Decorated Wool and the Mechanism

Chun Cao ^1,2,3 ,
Hong-liang Kang ⁴ ,
Ping-ping Li ^1,2,3 ,
Chao Zhang ^1,2,3 ,
Wei-wei Li ^1,2,3 ,
Yong Huang ^1,5,3 ,
Rui-gang Liu ⁴

1.
1. Sate Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190
2.
2. University of Chinese Academy of Science, Beijing 100049
3.
4.
Sate Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190
5.
2. National Research Center for Engineering Plastics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190

Received Date: 6 September 2015
Revised Date: 25 September 2015

A novel Fe3+ loaded polyacrylamidoxime modified waste wool adsorbent (Fe3+/W-g-PAO) was prepared to eliminate fluorinion (F-) in aqueous solutions.To be specific, polyacrylonitrile (PAN) was first grafted onto the waste wool by traditional free radical polymerization, in which thiol groups on waste wool were act as active sites for chain transfer.Subsequently, cyano-groups were converted to amidoxime groups.The prepared adsorbent (W-g-PAO) could successfully load Fe3+, due to the outstanding coordination ability of amidoxime groups with Fe3+.Fe3+/W-g-PAO possessed excellent adsorption capacity for F-, and the adsorption process was rapid and efficient.The adsorption process of F- on Fe3+/W-g-PAO could be fitted well by the quasi-two dynamics model and Langmuir model.However, by this adsorption style, the adsorption capacity of F- on W-g-PAO was only 14.26 mg/g.If the formation of coordination compounds of Fe3+ and F- was first prepared, the adsorption capacity of F- on W-g-PAO could be improved significantly to 49.2 mg/g.That's because Fe3+ could be reduced into Fe2+ during the loading process of Fe3+.The results indicated that the structure of Fe(III)[F-]3[-NH2]3 was formed when F- was adsorbed on Fe3+/W-g-PAO.In conclusion, the material prepared in this work, W-g-PAO, has the advantages of low-cost, recyclable and excellent adsorption capacity, which can be used as a promising material for the application in the treatment of waste water containing fluoride ions.
- Polyacrylamidoxime,
- Waste treatment,
- Fe3+-loaded,
- Fluorinion,
- Adsorption
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