Construction of a phosphate-rich polyacrylonitrile fiber surface microenvironment for efficient purification of crystal violet wastewater
Wastewater purification using fibrous adsorbents has received much attention due to their high efficiency, low cost, and recyclability. In this work, phosphate modified polyacrylonitrile fiber (B-PAN EAP F) was prepared and used to remove cationic dyes. The B-PAN EAP F showed the best adsorption cap...
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Published in | RSC advances Vol. 9; no. 64; pp. 3763 - 37641 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
England
Royal Society of Chemistry
19.11.2019
The Royal Society of Chemistry |
Subjects | |
Online Access | Get full text |
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Summary: | Wastewater purification using fibrous adsorbents has received much attention due to their high efficiency, low cost, and recyclability. In this work, phosphate modified polyacrylonitrile fiber (B-PAN
EAP
F) was prepared and used to remove cationic dyes. The B-PAN
EAP
F showed the best adsorption capacity for crystal violet (CV) when compared with rhodamine B, methyl green, Victoria blue B, methylene blue, and neutral red. The adsorption tests revealed that the fiber possessed high adsorption efficiency and achieved semi-saturated adsorption within 15 min. The maximum adsorption capacity of 354.46 mg g
−1
as calculated by the Langmuir adsorption model was higher than many other adsorbents. Furthermore, the B-PAN
EAP
F was used to remove 210 mL of CV in a continuous-flow process with a high removal efficiency over 90%. Besides, the phosphate functionalized fiber could easily decrease the concentration of CV to below 0.5 mg L
−1
which is below the maximum effluent discharge standard of 15 mg L
−1
prescribed in China. It could also be fully recovered and easily separated from the solution to achieve re-use 10 cycles. Moreover, the adsorption mechanism indicated that the adsorption process of the fiber for CV was mainly attributed to electrostatic interaction and hydrogen bonding. In conclusion, the results suggested that the B-PAN
EAP
F characterized by its simplicity, efficiency, eco-friendliness, and reusability, could be a promising candidate for CV removal.
A novel recyclable phosphate functionalized polyacrylonitrile fiber shows excellent selectivity and adsorption capacity for crystal violet. It can be used to remove this dye in a flow process with high removal efficiency. |
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Bibliography: | Electronic supplementary information (ESI) available. See DOI 10.1039/c9ra07199g ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 2046-2069 2046-2069 |
DOI: | 10.1039/c9ra07199g |