Nanoparticulate zero-valent iron coupled with polyphosphate: the sequential redox treatment of organic compounds and its stability and bacterial toxicity

2017 ◽  
Vol 4 (2) ◽  
pp. 396-405 ◽  
Author(s):  
Hak-Hyeon Kim ◽  
Min Sik Kim ◽  
Hyung-Eun Kim ◽  
Hye-Jin Lee ◽  
Min-Hee Jang ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Zero Valent Iron ◽  
Redox Treatment ◽  
Bacterial Toxicity

TPP enhances the reactivity and stability of nZVI, decreasing the bacterial toxicity.

A comparative study of the degradation efficiency of chlorinated organic compounds by bimetallic zero-valent iron nanoparticles

2021 ◽  
Author(s):  
Abhilash Venkateshaiah ◽  
Daniele Silvestri ◽  
Stanislaw Wacławek ◽  
Rohith K. Ramakrishnan ◽  
Kamil Krawczyk ◽  
...  
Keyword(s):  
Comparative Study ◽  
Organic Compounds ◽  
Iron Nanoparticles ◽  
Degradation Efficiency ◽  
Zero Valent Iron ◽  
Chlorinated Organic Compounds ◽  
Aquatic Pollutants ◽  
Chlorinated Organic ◽  
Zero Valent Iron Nanoparticles

The efficacy of zero-valent iron nanoparticles (nZVI) in degrading aquatic pollutants could be enhanced by the deposition of other metals on their surface. This article describes the synthesis of bimetallic...

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>

Removal of organic compounds and trace metals from oil sands process-affected water using zero valent iron enhanced by petroleum coke

2014 ◽  
Vol 139 ◽  
pp. 50-58 ◽  
Author(s):  
Parastoo Pourrezaei ◽  
Alla Alpatova ◽  
Kambiz Khosravi ◽  
Przemysław Drzewicz ◽  
Yuan Chen ◽  
...  
Keyword(s):  
Trace Metals ◽  
Organic Compounds ◽  
Petroleum Coke ◽  
Oil Sands ◽  
Zero Valent Iron
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