期刊
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
卷 112, 期 -, 页码 200-208出版社
ELSEVIER
DOI: 10.1016/j.psep.2017.04.027
关键词
nZVI particles; Electrospinning; Polymer nanofibers; Immobilization; -COOH/-OH ratio; Groundwater remediation; Zero-valent iron
资金
- Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE) [4.1.18-13/14]
A new approach that combines nanoscale zero-valent iron (nZVI) with electrospinning technology has been put forward to avoid nZVI agglomeration and a secondary pollution. In this study, to enhance the immobilization of nZVI particles onto the polyacrylic acid (PAA)/polyvinyl alcohol (PVA) electrospun nanofiber mat, mats (M1, M2 and M3) with different PAA/PVA mass ratios (1:1, 2:1 and 3:1) were tested for the immobilization of nZVI particles and their performance of removing contaminants. The results indicate that M3 immobilized the most nZVI particles (48.4 wt% on the mat, 2.5 times the figure for previous study) and had the highest removals to methylene blue and Cu(II) ions at 94% and 83.6% respectively, resulting from more free carboxylic groups available on the cross-linked nanofibers as well as a higher porosity into the mat. Therefore, increasing the PAA/PVA ratio is effective to boost the performance of nZVI-PAA/PVA electrospun nanofiber mat, which has a great potential for the application of nZVI-targeted contaminants remediation. (C) 2017 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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