Enhanced nitrate reduction by HPMC-stabilized nanoscale zero-valent iron (H-NZVI): Synthesis, characterization and reaction kinetics
Nano zero-valent iron (NZVI) was successfully stabilized by using hydroxypropyl methyl cellulose (HPMC). Systematic characterization observations (including XRD, TEM, FTIR, and VSM), as well as settling performance, illustrated that, compared to bare nano zero-valent iron particles (NZVI), the dispe...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-04-01
|
| Series: | Desalination and Water Treatment |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1944398625001808 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850133075902595072 |
|---|---|
| author | Da Ma Xusheng Li Huian Zou Yi Qian Mengqi Li Wenchuan Xu |
| author_facet | Da Ma Xusheng Li Huian Zou Yi Qian Mengqi Li Wenchuan Xu |
| author_sort | Da Ma |
| collection | DOAJ |
| description | Nano zero-valent iron (NZVI) was successfully stabilized by using hydroxypropyl methyl cellulose (HPMC). Systematic characterization observations (including XRD, TEM, FTIR, and VSM), as well as settling performance, illustrated that, compared to bare nano zero-valent iron particles (NZVI), the dispersity and antioxidizability of HPMC-stabilized nanoscale zero-valent iron particles (H-NZVI) were improved. Nitrate reduction efficiencies by using iron powder, NZVI, H-NZVI-5, H-NZVI-10, and H-NZVI-20 were examined, and the results showed that a moderate amount of HPMC in modification can help prevent the aggregation of NZVI and achieve high reduction efficiency. Excessive HPMC in preparation led to a decline in reduction efficiency. In addition, effects of initial pH, dissolved oxygen concentrations, and reaction temperatures on nitrate removal were studied. The results showed that the efficiency decreased with increases in initial pH and dissolved oxygen concentrations. However, the stabilized NZVI showed great superiority to bare NZVI, maintaining high activity even at basic pH or aerobic conditions. Pseudo first-order kinetics was applied to study nitrate reduction kinetics and confirmed to correlate well with experimental data. Through analysis of rate constants at different temperatures, the apparent activation energy for nitrate reduction by H-NZVI-10 was calculated to be approximately 15.18 kJ/mol. This study demonstrates that HPMC-stabilized NZVI can serve as a promising nanomaterial for enhancing nitrate reduction of nitrate. |
| format | Article |
| id | doaj-art-4bf2022d8b4b42a5bc4653c65a230a1d |
| institution | OA Journals |
| issn | 1944-3986 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Desalination and Water Treatment |
| spelling | doaj-art-4bf2022d8b4b42a5bc4653c65a230a1d2025-08-20T02:32:04ZengElsevierDesalination and Water Treatment1944-39862025-04-0132210116410.1016/j.dwt.2025.101164Enhanced nitrate reduction by HPMC-stabilized nanoscale zero-valent iron (H-NZVI): Synthesis, characterization and reaction kineticsDa Ma0Xusheng Li1Huian Zou2Yi Qian3Mengqi Li4Wenchuan Xu5Chongqing Yuxiang Double Line Expressway Co., Ltd., No. 66 Yinshan Road, Yubei District, Chongqing 408515, PR China; China Communications Highway Planning and Design Institute Co., Ltd., No. 969 Hanzhou Road, Zhengxing Street, Tianfu New Area, Chengdu, Sichuan Province 610213, PR ChinaChongqing Yuxiang Double Line Expressway Co., Ltd., No. 66 Yinshan Road, Yubei District, Chongqing 408515, PR China; China Communications Highway Planning and Design Institute Co., Ltd., No. 969 Hanzhou Road, Zhengxing Street, Tianfu New Area, Chengdu, Sichuan Province 610213, PR ChinaChongqing Yuxiang Double Line Expressway Co., Ltd., No. 66 Yinshan Road, Yubei District, Chongqing 408515, PR China; China Communications Highway Planning and Design Institute Co., Ltd., No. 969 Hanzhou Road, Zhengxing Street, Tianfu New Area, Chengdu, Sichuan Province 610213, PR ChinaChongqing Yuxiang Double Line Expressway Co., Ltd., No. 66 Yinshan Road, Yubei District, Chongqing 408515, PR China; China Communications Highway Planning and Design Institute Co., Ltd., No. 969 Hanzhou Road, Zhengxing Street, Tianfu New Area, Chengdu, Sichuan Province 610213, PR ChinaChongqing Yuxiang Double Line Expressway Co., Ltd., No. 66 Yinshan Road, Yubei District, Chongqing 408515, PR China; China Communications Highway Planning and Design Institute Co., Ltd., No. 969 Hanzhou Road, Zhengxing Street, Tianfu New Area, Chengdu, Sichuan Province 610213, PR ChinaChongqing Yuxiang Double Line Expressway Co., Ltd., No. 66 Yinshan Road, Yubei District, Chongqing 408515, PR China; China Communications Highway Planning and Design Institute Co., Ltd., No. 969 Hanzhou Road, Zhengxing Street, Tianfu New Area, Chengdu, Sichuan Province 610213, PR China; Corresponding author at: China Communications Highway Planning and Design Institute Co., Ltd., No. 969 Hanzhou Road, Zhengxing Street, Tianfu New Area, Chengdu, Sichuan Province 610213, PR China.Nano zero-valent iron (NZVI) was successfully stabilized by using hydroxypropyl methyl cellulose (HPMC). Systematic characterization observations (including XRD, TEM, FTIR, and VSM), as well as settling performance, illustrated that, compared to bare nano zero-valent iron particles (NZVI), the dispersity and antioxidizability of HPMC-stabilized nanoscale zero-valent iron particles (H-NZVI) were improved. Nitrate reduction efficiencies by using iron powder, NZVI, H-NZVI-5, H-NZVI-10, and H-NZVI-20 were examined, and the results showed that a moderate amount of HPMC in modification can help prevent the aggregation of NZVI and achieve high reduction efficiency. Excessive HPMC in preparation led to a decline in reduction efficiency. In addition, effects of initial pH, dissolved oxygen concentrations, and reaction temperatures on nitrate removal were studied. The results showed that the efficiency decreased with increases in initial pH and dissolved oxygen concentrations. However, the stabilized NZVI showed great superiority to bare NZVI, maintaining high activity even at basic pH or aerobic conditions. Pseudo first-order kinetics was applied to study nitrate reduction kinetics and confirmed to correlate well with experimental data. Through analysis of rate constants at different temperatures, the apparent activation energy for nitrate reduction by H-NZVI-10 was calculated to be approximately 15.18 kJ/mol. This study demonstrates that HPMC-stabilized NZVI can serve as a promising nanomaterial for enhancing nitrate reduction of nitrate.http://www.sciencedirect.com/science/article/pii/S1944398625001808HPMCNZVIStabilizationNitrate reduction |
| spellingShingle | Da Ma Xusheng Li Huian Zou Yi Qian Mengqi Li Wenchuan Xu Enhanced nitrate reduction by HPMC-stabilized nanoscale zero-valent iron (H-NZVI): Synthesis, characterization and reaction kinetics Desalination and Water Treatment HPMC NZVI Stabilization Nitrate reduction |
| title | Enhanced nitrate reduction by HPMC-stabilized nanoscale zero-valent iron (H-NZVI): Synthesis, characterization and reaction kinetics |
| title_full | Enhanced nitrate reduction by HPMC-stabilized nanoscale zero-valent iron (H-NZVI): Synthesis, characterization and reaction kinetics |
| title_fullStr | Enhanced nitrate reduction by HPMC-stabilized nanoscale zero-valent iron (H-NZVI): Synthesis, characterization and reaction kinetics |
| title_full_unstemmed | Enhanced nitrate reduction by HPMC-stabilized nanoscale zero-valent iron (H-NZVI): Synthesis, characterization and reaction kinetics |
| title_short | Enhanced nitrate reduction by HPMC-stabilized nanoscale zero-valent iron (H-NZVI): Synthesis, characterization and reaction kinetics |
| title_sort | enhanced nitrate reduction by hpmc stabilized nanoscale zero valent iron h nzvi synthesis characterization and reaction kinetics |
| topic | HPMC NZVI Stabilization Nitrate reduction |
| url | http://www.sciencedirect.com/science/article/pii/S1944398625001808 |
| work_keys_str_mv | AT dama enhancednitratereductionbyhpmcstabilizednanoscalezerovalentironhnzvisynthesischaracterizationandreactionkinetics AT xushengli enhancednitratereductionbyhpmcstabilizednanoscalezerovalentironhnzvisynthesischaracterizationandreactionkinetics AT huianzou enhancednitratereductionbyhpmcstabilizednanoscalezerovalentironhnzvisynthesischaracterizationandreactionkinetics AT yiqian enhancednitratereductionbyhpmcstabilizednanoscalezerovalentironhnzvisynthesischaracterizationandreactionkinetics AT mengqili enhancednitratereductionbyhpmcstabilizednanoscalezerovalentironhnzvisynthesischaracterizationandreactionkinetics AT wenchuanxu enhancednitratereductionbyhpmcstabilizednanoscalezerovalentironhnzvisynthesischaracterizationandreactionkinetics |