Synthesis and application of stabilized zero-valent iron nanoparticles for hexavalent chromium removal in saturated sand columns: experimental and modeling studies

2015 ◽  
Vol 57 (33) ◽  
pp. 15424-15434 ◽  
Author(s):  
Amirhosein Ramazanpour Esfahani ◽  
Ahmad Farrokhian Firouzi
Keyword(s):  
Hexavalent Chromium ◽  
Iron Nanoparticles ◽  
Zero Valent Iron ◽  
Chromium Removal ◽  
Saturated Sand ◽  
Modeling Studies ◽  
Zero Valent Iron Nanoparticles

Zero-valent iron nanoparticles supported by functionalized waste rock wool for efficient removal of hexavalent chromium

2018 ◽  
Vol 339 ◽  
pp. 85-96 ◽  
Author(s):  
Linglin Zhou ◽  
Rongrong Li ◽  
Guilong Zhang ◽  
Dongfang Wang ◽  
Dongqing Cai ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Iron Nanoparticles ◽  
Waste Rock ◽  
Zero Valent Iron ◽  
Efficient Removal ◽  
Zero Valent Iron Nanoparticles ◽  
Rock Wool

Reduction of hexavalent chromium by carboxymethyl cellulose-stabilized zero-valent iron nanoparticles

2010 ◽  
Vol 114 (1-4) ◽  
pp. 35-42 ◽  
Author(s):  
Qian Wang ◽  
Huijing Qian ◽  
Yueping Yang ◽  
Zhen Zhang ◽  
Cissoko Naman ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Carboxymethyl Cellulose ◽  
Iron Nanoparticles ◽  
Zero Valent Iron ◽  
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>

Remediation of hexavalent chromium contaminated soil by biochar-supported zero-valent iron nanoparticles

2016 ◽  
Vol 318 ◽  
pp. 533-540 ◽  
Author(s):  
Huijie Su ◽  
Zhanqiang Fang ◽  
Pokeung Eric Tsang ◽  
Liuchun Zheng ◽  
Wen Cheng ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Contaminated Soil ◽  
Iron Nanoparticles ◽  
Zero Valent Iron ◽  
Zero Valent Iron Nanoparticles
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