scholarly journals Cellulose nanocrystal zero-valent iron nanocomposites for groundwater remediation

2017 ◽  
Vol 4 (6) ◽  
pp. 1294-1303 ◽  
Author(s):  
Nathan Bossa ◽  
Alexis Wells Carpenter ◽  
Naresh Kumar ◽  
Charles-François de Lannoy ◽  
Mark Wiesner
Keyword(s):  
Groundwater Remediation ◽  
Zero Valent Iron ◽  
Cellulose Nanocrystal ◽  
Environmentally Sustainable ◽  
Subsurface Remediation

Use of crystal nanocellulose to stabilize nano-ZVI has tremendous potential to improve the capability and applicability of nano-ZVI based subsurface remediation systems in an environmentally sustainable way.

scholarly journals Zero-Valent Iron Nanoparticles for Soil and Groundwater Remediation

2020 ◽  
Vol 17 (16) ◽  
pp. 5817
Author(s):  
Alazne Galdames ◽  
Leire Ruiz-Rubio ◽  
Maider Orueta ◽  
Miguel Sánchez-Arzalluz ◽  
José Luis Vilas-Vilela
Keyword(s):  
Contaminated Soils ◽  
Groundwater Remediation ◽  
Iron Nanoparticles ◽  
Environmental Issues ◽  
High Specific Surface Area ◽  
Zero Valent Iron ◽  
Pilot Studies ◽  
High Effectiveness ◽  
Nanosized Materials ◽  
Zero Valent Iron Nanoparticles

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.

Zero‐Valent Iron (ZVI) for Groundwater Remediation

2021 ◽  
pp. 282-309
Author(s):  
Naresh K. Sethy ◽  
Zeenat Arif ◽  
K.S. Sista ◽  
Pradeep Kumar ◽  
P.K. Mishra ◽  
...  
Keyword(s):  
Groundwater Remediation ◽  
Zero Valent Iron

Modification of Zero Valent Iron Nanoparticles by Sodium Alginate and Bentonite: Enhanced Transport, Effective Hexavalent Chromium Removal and Reduced Bacterial Toxicity

2020 ◽  
Author(s):  
Mengya Zhang ◽  
Kexin Yi ◽  
Xiangwei Zhang ◽  
Peng Han ◽  
Wen Liu ◽  
...  
Keyword(s):  
Sodium Alginate ◽  
Groundwater Remediation ◽  
Iron Nanoparticles ◽  
Zero Valent Iron ◽  
Sedimentation Rates ◽  
Chromium Removal ◽  
Zeta Potentials ◽  
Bacterial Toxicity ◽  
Zero Valent Iron Nanoparticles

<p>The rapid aggregation/sedimentation and decreased transport of nanoscale zero-valent iron (nZVI) particles limit their application in groundwater remediation. To decrease the aggregation/sedimentation and increase the transport of nZVI, sodium alginate (a neutral polysaccharide) and bentonite (one type of ubiquitous clay) were employed to modify nZVI. Different techniques were utilized to characterize the modified nZVI. We found that modification with either sodium alginate or bentonite could disperse the nZVI and shifted their zeta potentials from positive to negative. Comparing with the bare nZVI, the sedimentation rates of modified nZVI either by sodium alginate or bentonite are greatly decreased and their transport are significantly increased. The transport of modified nZVI can be greatly increased by increasing flow rate. Furthermore, Cr(VI) can be efficiently removed by the modified nZVI (both sodium alginate and bentonite modified nZVI). Comparing with bare nZVI, the two types of modified nZVI contain lower toxicities to Escherichia coli. The results of this study indicate that both sodium alginate and bentonite can be employed as potential stabilizers to disperse nZVI and improve their application feasibility for in situ groundwater remediation.</p>

APPLICATION OF NANOSCALE ZERO-VALENT IRON FOR GROUNDWATER REMEDIATION: LABORATORY AND PILOT EXPERIMENTS

NANO ◽  
2008 ◽  
Vol 03 (04) ◽  
pp. 287-289 ◽  
Author(s):  
STEPANKA KLIMKOVA ◽  
MIROSLAV CERNIK ◽  
LENKA LACINOVA ◽  
JAROSLAV NOSEK
Keyword(s):  
Heavy Metals ◽  
Groundwater Remediation ◽  
Laboratory Experiments ◽  
Permeable Reactive Barriers ◽  
Zero Valent Iron ◽  
Chlorinated Ethenes ◽  
Soluble Form ◽  
Chemical Decontamination ◽  
Nanoscale Zero Valent Iron

It is known that the reductive effects of zero-valent iron ( Fe 0) and the sorptive capability of iron and its oxides can be used for both the dehalogenation of chlorinated hydrocarbons (CHC), especially of chlorinated ethenes (PCE → TCE → DCE → VC → ethene, ethane), and the removing of heavy metals from groundwater by turning them into a less-soluble form through changes of their oxidation state, or by adsorption. These consequences are being exploited in the construction of iron filling permeable reactive barriers for a longer time.1 The advantages of nanoscale zero-valent iron ( nanoFe 0) over the macroscopic one consist not only in the better reactivity implicit in their greater specific surface area but also in their mobility in rock environment.2,3 Numerous laboratory experiments, especially the batch-agitated experiments, with samples from seven various contaminated localities in Europe have been carried out with the aim to discover the measurement of the reductive effect of the nanoFe 0 on selected contaminants. It was found that the nanoFe 0 can be reliably usable as a reductive reactant for in-situ chemical decontamination of sites polluted by chlorinated ethenes (CEs), or hexa-valent chromium ( Cr VI ). The rate of reductive reaction and the optimal concentrations for the real remediation action were determined. On the basis of these laboratory experiments, the methods for pilot application of nanoFe 0 have been specified. Subsequently the pilot experiments were accomplished in surveyed localities.

scholarly journals Application of nanoscale zero valent iron (NZVI) for groundwater remediation in Europe

2011 ◽  
Vol 19 (2) ◽  
pp. 550-558 ◽  
Author(s):  
Nicole C. Mueller ◽  
Jürgen Braun ◽  
Johannes Bruns ◽  
Miroslav Černík ◽  
Peter Rissing ◽  
...  
Keyword(s):  
Groundwater Remediation ◽  
Zero Valent Iron ◽  
Nanoscale Zero Valent Iron
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