Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/162020
Title: Boosting the activity and environmental stability of nanoscale zero-valent iron by montmorillonite supporting and sulfidation treatment
Authors: Xu, Bu-De
Li, De-Chang
Qian, Tingting
Jiang, Hong
Keywords: Science::Chemistry
Issue Date: 2020
Source: Xu, B., Li, D., Qian, T. & Jiang, H. (2020). Boosting the activity and environmental stability of nanoscale zero-valent iron by montmorillonite supporting and sulfidation treatment. Chemical Engineering Journal, 387, 124063-. https://dx.doi.org/10.1016/j.cej.2020.124063
Journal: Chemical Engineering Journal
Abstract: Given its high activity and nontoxicity, nanoscale zero-valent iron (nZVI) has been intensively used to remediate the groundwater contaminated by trichloroethylene (TCE). However, the long-term stability of nZVI could be impaired by aging and natural organic matter. Herein, a montmorillonite-supported sulfurated nZVI (S-nZVI/MMT) was successfully synthesized, which exhibited robust activity and stability under environmental conditions through the interlayer interaction of MMT. The removal efficiency of TCE by S-nZVI/MMT reached 78.7%, which was much higher than that by S-nZVI and nZVI/MMT, within 12 h with Fe/S dosage ratio of 1:1 and particle dosage of 4 g/L. Importantly, the presence of high concentration of humic acid (up to 50 mg/L) caused unobvious effect on the performance of S-nZVI/MMT toward TCE removal, and more than 68.1% of removal efficiency of TCE could be maintained when the particle was aged in water for 30 days. The high activity and stability of S-nZVI/MMT may be attributed to the formation of nano-sized S-nZVI clusters in the MMT interlayer, protecting the active sites from passivation of humic acid. This work may promote the application of nZVI under complex natural conditions.
URI: https://hdl.handle.net/10356/162020
ISSN: 1385-8947
DOI: 10.1016/j.cej.2020.124063
Rights: © 2020 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:NEWRI Journal Articles

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