Stabilization of Zero-Valent Iron Nanoparticles for Enhanced In Situ Destruction of Chlorinated Solvents in Soils and Groundwater

2009 ◽  
pp. 281-291 ◽  
Author(s):  
Feng He ◽  
Dongye Zhao ◽  
Chris Roberts
Keyword(s):  
Iron Nanoparticles ◽  
Chlorinated Solvents ◽  
Zero Valent Iron ◽  
Zero Valent Iron Nanoparticles

Zero-valent iron nanoparticles in treatment of acid mine water from in situ uranium leaching

Chemosphere ◽  
2011 ◽  
Vol 82 (8) ◽  
pp. 1178-1184 ◽  
Author(s):  
Stepanka Klimkova ◽  
Miroslav Cernik ◽  
Lenka Lacinova ◽  
Jan Filip ◽  
Dalibor Jancik ◽  
...  
Keyword(s):  
Mine Water ◽  
Iron Nanoparticles ◽  
Zero Valent Iron ◽  
Acid Mine Water ◽  
Uranium Leaching ◽  
Acid Mine ◽  
Zero Valent Iron Nanoparticles

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>

In-situ reductive degradation of chlorinated DNAPLs in contaminated groundwater using polyethyleneimine-modified zero-valent iron nanoparticles

Chemosphere ◽  
2019 ◽  
Vol 224 ◽  
pp. 816-826 ◽  
Author(s):  
Ndumiso Vukile Mdlovu ◽  
Kuen-Song Lin ◽  
Chung-Yu Chen ◽  
Fikile Agath Mavuso ◽  
Sikhumbuzo Charles Kunene ◽  
...  
Keyword(s):  
Iron Nanoparticles ◽  
Zero Valent Iron ◽  
Contaminated Groundwater ◽  
Reductive Degradation ◽  
Zero Valent Iron Nanoparticles

Environmental benefits and risks of zero-valent iron nanoparticles (nZVI) for in situ remediation: Risk mitigation or trade-off?

2010 ◽  
Vol 118 (3-4) ◽  
pp. 165-183 ◽  
Author(s):  
Khara D. Grieger ◽  
Annika Fjordbøge ◽  
Nanna B. Hartmann ◽  
Eva Eriksson ◽  
Poul L. Bjerg ◽  
...  
Keyword(s):  
Iron Nanoparticles ◽  
Risk Mitigation ◽  
Zero Valent Iron ◽  
Environmental Benefits ◽  
In Situ Remediation ◽  
Trade Off ◽  
Zero Valent Iron Nanoparticles
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