Boosting the activity and environmental stability of nanoscale zero-valent iron by montmorillonite supporting and sulfidation treatment
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-support...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/162020 |
| _version_ | 1826120694693363712 |
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| author | Xu, Bu-De Li, De-Chang Qian, Tingting Jiang, Hong |
| author2 | Nanyang Environment and Water Research Institute |
| author_facet | Nanyang Environment and Water Research Institute Xu, Bu-De Li, De-Chang Qian, Tingting Jiang, Hong |
| author_sort | Xu, Bu-De |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T05:20:58Z |
| format | Journal Article |
| id | ntu-10356/162020 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:20:58Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1620202022-09-29T06:22:02Z Boosting the activity and environmental stability of nanoscale zero-valent iron by montmorillonite supporting and sulfidation treatment Xu, Bu-De Li, De-Chang Qian, Tingting Jiang, Hong Nanyang Environment and Water Research Institute Advanced Environmental Biotechnology Centre (AEBC) Science::Chemistry Montmorillonite Trichloroethylene 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. The authors gratefully acknowledge financial support from National Natural Science Foundation of China (21876166, 41501247), and the Key Special Program on the S&T for the Pollution Control, and Treatment of Water Bodies (No. 2017ZX07603-003). 2022-09-29T06:22:02Z 2022-09-29T06:22:02Z 2020 Journal Article 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 1385-8947 https://hdl.handle.net/10356/162020 10.1016/j.cej.2020.124063 2-s2.0-85078006405 387 124063 en Chemical Engineering Journal © 2020 Elsevier B.V. All rights reserved. |
| spellingShingle | Science::Chemistry Montmorillonite Trichloroethylene Xu, Bu-De Li, De-Chang Qian, Tingting Jiang, Hong Boosting the activity and environmental stability of nanoscale zero-valent iron by montmorillonite supporting and sulfidation treatment |
| title | Boosting the activity and environmental stability of nanoscale zero-valent iron by montmorillonite supporting and sulfidation treatment |
| title_full | Boosting the activity and environmental stability of nanoscale zero-valent iron by montmorillonite supporting and sulfidation treatment |
| title_fullStr | Boosting the activity and environmental stability of nanoscale zero-valent iron by montmorillonite supporting and sulfidation treatment |
| title_full_unstemmed | Boosting the activity and environmental stability of nanoscale zero-valent iron by montmorillonite supporting and sulfidation treatment |
| title_short | Boosting the activity and environmental stability of nanoscale zero-valent iron by montmorillonite supporting and sulfidation treatment |
| title_sort | boosting the activity and environmental stability of nanoscale zero valent iron by montmorillonite supporting and sulfidation treatment |
| topic | Science::Chemistry Montmorillonite Trichloroethylene |
| url | https://hdl.handle.net/10356/162020 |
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