Selenate removal by zero-valent iron in oxic condition: the role of Fe(II) and selenate removal mechanism

2015 ◽  
Vol 23 (2) ◽  
pp. 1081-1090 ◽  
Author(s):  
In-Ho Yoon ◽  
Sunbaek Bang ◽  
Kyoung-Woong Kim ◽  
Min Gyu Kim ◽  
Sang Yoon Park ◽  
...  
Keyword(s):  
Zero Valent Iron ◽  
Removal Mechanism ◽  
Oxic Condition

scholarly journals Nano Zero Valent Iron (nZVI) as an Amendment for Phytostabilization of Highly Multi-PTE Contaminated Soil

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2559
Author(s):  
Maja Radziemska ◽  
Zygmunt M. Gusiatin ◽  
Jiri Holatko ◽  
Tereza Hammerschmiedt ◽  
Andrzej Głuchowski ◽  
...  
Keyword(s):  
Plant Biomass ◽  
Absorption Spectrometry ◽  
Zero Valent Iron ◽  
Festuca Rubra ◽  
Control Series ◽  
Flame Atomic Absorption ◽  
Zn Content ◽  
Nano Zero Valent Iron ◽  
Average Plant

In recent years, a lot of attention has been given to searching for new additives which will effectively facilitate the process of immobilizing contaminants in the soil. This work considers the role of the enhanced nano zero valent iron (nZVI) strategy in the phytostabilization of soil contaminated with potentially toxic elements (PTEs). The experiment was carried out on soil that was highly contaminated with PTEs derived from areas in which metal waste had been stored for many years. The plants used comprised a mixture of grasses—Lolium perenne L. and Festuca rubra L. To determine the effect of the nZVI on the content of PTEs in soil and plants, the samples were analyzed using flame atomic absorption spectrometry (FAAS). The addition of nZVI significantly increased average plant biomass (38%), the contents of Cu (above 2-fold), Ni (44%), Cd (29%), Pb (68%), Zn (44%), and Cr (above 2-fold) in the roots as well as the soil pH. The addition of nZVI, on the other hand, was most effective in reducing the Zn content of soil when compared to the control series. Based on the investigations conducted, the application of nZVI to soil highly contaminated with PTEs is potentially beneficial for the restoration of polluted lands.

Unveiling the Role of Sulfur in Rapid Defluorination of Florfenicol by Sulfidized Nanoscale Zero-Valent Iron in Water under Ambient Conditions

2021 ◽  
Vol 55 (4) ◽  
pp. 2628-2638
Author(s):  
Zhen Cao ◽  
Hao Li ◽  
Gregory V. Lowry ◽  
Xiaoyang Shi ◽  
Xiangcheng Pan ◽  
...  
Keyword(s):  
Zero Valent Iron ◽  
Ambient Conditions ◽  
Nanoscale Zero Valent Iron

Pentachlorophenol dechlorination with zero valent iron: a Raman and GCMS study of the complex role of surficial iron oxides

2018 ◽  
Vol 25 (18) ◽  
pp. 17797-17806 ◽  
Author(s):  
Buddhika Gunawardana ◽  
Peter J. Swedlund ◽  
Naresh Singhal ◽  
Michel K. Nieuwoudt
Keyword(s):  
Iron Oxides ◽  
Zero Valent Iron

scholarly journals New Perspectives on Iron-Based Nanostructures

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1128
Author(s):  
Seyedeh-Masoumeh Taghizadeh ◽  
Aydin Berenjian ◽  
Marziyeh Zare ◽  
Alireza Ebrahiminezhad
Keyword(s):  
Pure Iron ◽  
Human Life ◽  
Zero Valent Iron ◽  
Iron Hydroxides ◽  
Human Beings ◽  
Iron Iron ◽  
Iron Based ◽  
Forms Of Iron ◽  
Structure Properties

Among all minerals, iron is one of the elements identified early by human beings to take advantage of and be used. The role of iron in human life is so great that it made an era in the ages of humanity. Pure iron has a shiny grayish-silver color, but after combining with oxygen and water it can make a colorful set of materials with divergent properties. This diversity sometimes appears ambiguous but provides variety of applications. In fact, iron can come in different forms: zero-valent iron (pure iron), iron oxides, iron hydroxides, and iron oxide hydroxides. By taking these divergent materials into the nano realm, new properties are exhibited, providing us with even more applications. This review deals with iron as a magic element in the nano realm and provides comprehensive data about its structure, properties, synthesis techniques, and applications of various forms of iron-based nanostructures in the science, medicine, and technology sectors.

New insights of enhanced anaerobic degradation of refractory pollutants in coking wastewater: Role of zero-valent iron in metagenomic functions

2020 ◽  
Vol 300 ◽  
pp. 122667 ◽  
Author(s):  
Weichao Xu ◽  
He Zhao ◽  
Hongbin Cao ◽  
Yuxiu Zhang ◽  
Yuxing Sheng ◽  
...  
Keyword(s):  
Anaerobic Degradation ◽  
Zero Valent Iron ◽  
Coking Wastewater

CFD Study on the Role of Gas Friction on the Molten Layer Shape and Melt Removal Mechanism in Laser Cutting Process of Steel

2013 ◽  
Vol 856 ◽  
pp. 220-225 ◽  
Author(s):  
Karim Kheloufi ◽  
El Hachemi Amara
Keyword(s):  
Friction Force ◽  
Laser Cutting ◽  
Cutting Process ◽  
Gradient Force ◽  
Pressure Gradient Force ◽  
Central Plane ◽  
Removal Mechanism ◽  
Molten Layer ◽  
Wavy Structure

A numerical analysis of the role of the gas friction force on the shape of the melt surface in laser cutting process is carried out. The liquid film shape is analyzed in the central plane of cutting for both cases with the pressure gradient force only and for the case of gas friction force contribution. It is shown that, the gas friction force has a significant role in the formation of humps in the central kerf zone and the transition from the smooth melt ejection regime to a wavy structure characterized by humps formation.

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