Probing pollutants reactions at the iron surface: A case study of selenite reactions with nanoscale zero-valent iron

2021 ◽  
Author(s):  
Qing Huang ◽  
Tianhang Gu ◽  
Airong Liu ◽  
Jing Liu ◽  
Wei-Xian Zhang
Keyword(s):  
Reaction Mechanism ◽  
Solid Phase ◽  
Zero Valent Iron ◽  
Iron Surface ◽  
High Efficacy ◽  
Redox Transformations ◽  
Nanoscale Zero Valent Iron

Nanoscale zero-valent iron (nZVI) has shown a high efficacy for removing selenite (Se(IV)) from water, yet the reaction mechanism in solid phase, especially the redox transformations of selenite in the...

scholarly journals Influence of nanoscale zero-valent iron on geochemical properties of groundwater and vinyl chloride degradation: A field case study

2010 ◽  
Vol 44 (1) ◽  
pp. 131-140 ◽  
Author(s):  
Yu-Ting Wei ◽  
Shian-Chee Wu ◽  
Chih-Ming Chou ◽  
Choi-Hong Che ◽  
Shin-Mu Tsai ◽  
...  
Keyword(s):  
Vinyl Chloride ◽  
Zero Valent Iron ◽  
Field Case ◽  
Geochemical Properties ◽  
Nanoscale Zero Valent Iron

scholarly journals Magnetic solid phase extraction based on graphene oxide/nanoscale zero-valent iron for the determination of tetracyclines in water and milk by using HPLC-MS/MS

RSC Advances ◽  
2017 ◽  
Vol 7 (70) ◽  
pp. 44578-44586 ◽  
Author(s):  
Dan Wei ◽  
Shuchao Wu ◽  
Yan Zhu
Keyword(s):  
Graphene Oxide ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Zero Valent Iron ◽  
Phase Extraction ◽  
Tetracycline Antibiotics ◽  
Nanoscale Zero Valent Iron ◽  
Magnetic Solid

A magnetic solid-phase extraction (MSPE) based on graphene oxide/nanoscale zero-valent iron (GO/nZVI) coupled with HPLC-MS/MS was proposed for the determination of trace tetracycline antibiotics (TCs) in water and milk.

scholarly journals Enrichment of Uranium from Aqueous Solutions with Nanoscale Zero-valent Iron: Surface Chemistry and Application Prospect

2021 ◽  
Vol 79 (8) ◽  
pp. 1008
Author(s):  
Yilong Hua ◽  
Donghan Li ◽  
Tianhang Gu ◽  
Wei Wang ◽  
Ruofan Li ◽  
...  
Keyword(s):  
Surface Chemistry ◽  
Aqueous Solutions ◽  
Zero Valent Iron ◽  
Iron Surface ◽  
Nanoscale Zero Valent Iron

The short-term reduction of uranium by nanoscale zero-valent iron (nZVI): role of oxide shell, reduction mechanism and the formation of U(v)-carbonate phases

2017 ◽  
Vol 4 (6) ◽  
pp. 1304-1313 ◽  
Author(s):  
Sergey Tsarev ◽  
Richard N. Collins ◽  
Eugene S. Ilton ◽  
Adam Fahy ◽  
T. David Waite
Keyword(s):  
Solid Phase ◽  
Zero Valent Iron ◽  
Oxide Shell ◽  
Reduction Mechanism ◽  
Short Term ◽  
Nanoscale Zero Valent Iron

Uranium(v) can be stabilized in a carbonate solid phase upon reaction with nanoscale zero-valent iron (nZVI).

Adsorption and advanced oxidation of diverse pharmaceuticals and personal care products (PPCPs) from water using highly efficient rGO–nZVI nanohybrids

2020 ◽  
Vol 6 (8) ◽  
pp. 2223-2238 ◽  
Author(s):  
Arvid Masud ◽  
Nita G. Chavez Soria ◽  
Diana S. Aga ◽  
Nirupam Aich
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Personal Care Products ◽  
Advanced Oxidation ◽  
Zero Valent Iron ◽  
Redox Activity ◽  
Personal Care ◽  
Adsorption Sites ◽  
Reduced Graphene ◽  
Nanoscale Zero Valent Iron

Reduced graphene oxide-nanoscale zero valent iron (rGO–nZVI) nanohybrid, with tunable adsorption sites of rGO and unique catalytic redox activity of nZVI, perform enhanced removal of diverse PPCPs from water.

scholarly journals Efficient Sequestration of Hexavalent Chromium by Graphene-Based Nanoscale Zero-Valent Iron Composite Coupled with Ultrasonic Pretreatment

2021 ◽  
Vol 18 (11) ◽  
pp. 5921
Author(s):  
Haiyan Song ◽  
Wei Liu ◽  
Fansheng Meng ◽  
Qi Yang ◽  
Niandong Guo
Keyword(s):  
Aqueous Solution ◽  
Removal Efficiency ◽  
Inhibitory Effect ◽  
Ultrasonic Cavitation ◽  
Zero Valent Iron ◽  
Ultrasonic Pretreatment ◽  
Nanoscale Zero Valent Iron ◽  
Passivation Layers ◽  
Initial Ph ◽  
Two Phases

Nanoscale zero-valent iron (nZVI) has attracted considerable attention for its potential to sequestrate and immobilize heavy metals such as Cr(VI) from an aqueous solution. However, nZVI can be easily oxidized and agglomerate, which strongly affects the removal efficiency. In this study, graphene-based nZVI (nZVI/rGO) composites coupled with ultrasonic (US) pretreatment were studied to solve the above problems and conduct the experiments of Cr(VI) removal from an aqueous solution. SEM-EDS, BET, XRD, and XPS were performed to analyze the morphology and structures of the composites. The findings showed that the removal efficiency of Cr(VI) in 30 min was increased from 45.84% on nZVI to 78.01% on nZVI/rGO and the removal process performed coupled with ultrasonic pretreatment could greatly shorten the reaction time to 15 min. Influencing factors such as the initial pH, temperature, initial Cr(VI) concentration, and co-existing anions were studied. The results showed that the initial pH was a principal factor. The presence of HPO42−, NO3−, and Cl− had a strong inhibitory effect on this process, while the presence of SO42− promoted the reactivity of nZVI/rGO. Combined with the above results, the process of Cr(VI) removal in US-nZVI/rGO system consisted of two phases: (1) The initial stage is dominated by solution reaction. Cr(VI) was reduced in the solution by Fe2+ caused by ultrasonic cavitation. (2) In the following processes, adsorption, reduction, and coprecipitation coexisted. The addition of rGO enhanced electron transportability weakened the influence of passivation layers and improved the dispersion of nZVI particles. Ultrasonic cavitation caused pores and corrosion at the passivation layers and fresh Fe0 core was exposed, which improved the reactivity of the composites.

scholarly journals Efficient activation of persulfate by calcium sulfate whisker supported nanoscale zero-valent iron for methyl orange removal

RSC Advances ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 452-461
Author(s):  
Yi Han ◽  
Xian Zhou ◽  
Li Lei ◽  
Huiqun Sun ◽  
Zhiyuan Niu ◽  
...  
Keyword(s):  
Composite Material ◽  
Methyl Orange ◽  
Calcium Sulfate ◽  
Zero Valent Iron ◽  
Nanoscale Zero Valent Iron ◽  
Calcium Sulfate Whiskers ◽  
Calcium Sulfate Whisker

In order to improve the utilization of nanoscale zero-valent iron (nZVI) in activating persulfate (PS), a composite material of nZVI/CSW with nZVI supported on calcium sulfate whiskers (CSWs) was synthesized in this study.

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