Enhanced nitrate removal and high selectivity towards dinitrogen for groundwater remediation using biochar-supported nano zero-valent iron

Zero-valent iron has been reported as a successful remediation agent for environmental issues, being extensively used in soil and groundwater remediation. The use of zero-valent nanoparticles have been arisen as a highly effective method due to the high specific surface area of zero-valent nanoparticles. Then, the development of nanosized materials in general, and the improvement of the properties of the nano-iron in particular, has facilitated their application in remediation technologies. As the result, highly efficient and versatile nanomaterials have been obtained. Among the possible nanoparticle systems, the reactivity and availability of zero-valent iron nanoparticles (NZVI) have achieved very interesting and promising results make them particularly attractive for the remediation of subsurface contaminants. In fact, a large number of laboratory and pilot studies have reported the high effectiveness of these NZVI-based technologies for the remediation of groundwater and contaminated soils. Although the results are often based on a limited contaminant target, there is a large gap between the amount of contaminants tested with NZVI at the laboratory level and those remediated at the pilot and field level. In this review, the main zero-valent iron nanoparticles and their remediation capacity are summarized, in addition to the pilot and land scale studies reported until date for each kind of nanomaterials.

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Impact of phosphate adsorption on the mobility of PANI‐supported nano zero‐valent iron

Vadose Zone Journal ◽

10.1002/vzj2.20091 ◽

2021 ◽

Author(s):

Dantong Lin ◽

Scott Bradford ◽

Liming Hu ◽

Irene M. C. Lo

Keyword(s):

Zero Valent Iron ◽

Phosphate Adsorption ◽

Nano Zero Valent Iron

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Comparison between nano zero valent iron supporting onto activated carbon collected via two types of reagents statistically: Carbon for cationic dye removal

Journal of Physics Conference Series ◽

10.1088/1742-6596/1853/1/012016 ◽

2021 ◽

Vol 1853 (1) ◽

pp. 012016

Author(s):

A K Hammed ◽

I K Al-Asfoor ◽

A K Al-Dahan

Keyword(s):

Activated Carbon ◽

Dye Removal ◽

Zero Valent Iron ◽

Cationic Dye ◽

Nano Zero Valent Iron

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

Materials ◽

10.3390/ma14102559 ◽

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.

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