Enhancement of microbial reductive dechlorination of polychlorinated biphenyls (PCBs) in a marine sediment by nanoscale zerovalent iron (NZVI) particles

2012 ◽  
Vol 87 (9) ◽  
pp. 1246-1253 ◽  
Author(s):  
Giulio Zanaroli ◽  
Andrea Negroni ◽  
Marta Vignola ◽  
Andrea Nuzzo ◽  
Hung-Yee Shu ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Marine Sediment ◽  
Reductive Dechlorination ◽  
Zerovalent Iron ◽  
Nanoscale Zerovalent Iron ◽  
Microbial Reductive Dechlorination

Reductive Dechlorination of Polychlorinated Biphenyls by Zerovalent Iron in Subcritical Water

1999 ◽  
Vol 33 (8) ◽  
pp. 1307-1310 ◽  
Author(s):  
Hwa K. Yak ◽  
Bernd W. Wenclawiak ◽  
I. Francis Cheng ◽  
John G. Doyle ◽  
Chien M. Wai
Keyword(s):  
Polychlorinated Biphenyls ◽  
Reductive Dechlorination ◽  
Subcritical Water ◽  
Zerovalent Iron

Reductive dechlorination of trichloroethylene by polyvinylpyrrolidone stabilized nanoscale zerovalent iron particles with Ni

2017 ◽  
Vol 340 ◽  
pp. 399-406 ◽  
Author(s):  
Macharla Arun Kumar ◽  
Sungjun Bae ◽  
Seunghee Han ◽  
Yoonseok Chang ◽  
Woojin Lee
Keyword(s):  
Reductive Dechlorination ◽  
Zerovalent Iron ◽  
Iron Particles ◽  
Nanoscale Zerovalent Iron

scholarly journals Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jien Ye ◽  
Yi Wang ◽  
Qiao Xu ◽  
Hanxin Wu ◽  
Jianhao Tong ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Removal Efficiency ◽  
Photoelectron Spectroscopy ◽  
Bimetallic Nanoparticles ◽  
Chemical Reduction ◽  
Particle Surface ◽  
Zerovalent Iron ◽  
Order Model ◽  
X Ray ◽  
Nanoscale Zerovalent Iron

AbstractPassivation of nanoscale zerovalent iron hinders its efficiency in water treatment, and loading another catalytic metal has been found to improve the efficiency significantly. In this study, Cu/Fe bimetallic nanoparticles were prepared by liquid-phase chemical reduction for removal of hexavalent chromium (Cr(VI)) from wastewater. Synthesized bimetallic nanoparticles were characterized by transmission electron microscopy, Brunauer–Emmet–Teller isotherm, and X-ray diffraction. The results showed that Cu loading can significantly enhance the removal efficiency of Cr(VI) by 29.3% to 84.0%, and the optimal Cu loading rate was 3% (wt%). The removal efficiency decreased with increasing initial pH and Cr(VI) concentration. The removal of Cr(VI) was better fitted by pseudo-second-order model than pseudo-first-order model. Thermodynamic analysis revealed that the Cr(VI) removal was spontaneous and endothermic, and the increase of reaction temperature facilitated the process. X-ray photoelectron spectroscopy (XPS) analysis indicated that Cr(VI) was completely reduced to Cr(III) and precipitated on the particle surface as hydroxylated Cr(OH)3 and CrxFe1−x(OH)3 coprecipitation. Our work could be beneficial for the application of iron-based nanomaterials in remediation of wastewater.

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