Simultaneous Adsorption/Reduction of Bromate by Nanoscale Zerovalent Iron Supported on Modified Activated Carbon

2013 ◽  
Vol 52 (35) ◽  
pp. 12574-12581 ◽  
Author(s):  
Xiuqiong Wu ◽  
Qi Yang ◽  
Dechao Xu ◽  
Yu Zhong ◽  
Kun Luo ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Zerovalent Iron ◽  
Modified Activated Carbon ◽  
Simultaneous Adsorption ◽  
Nanoscale Zerovalent Iron ◽  
Adsorption Reduction

Chromium (VI) removal from water using starch coated nanoscale zerovalent iron particles supported on activated carbon

2018 ◽  
Vol 206 (6) ◽  
pp. 708-715 ◽  
Author(s):  
Bin Ji ◽  
Yaorong Shu ◽  
Yuexin Li ◽  
Jiale Wang ◽  
Yuting Shi ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Zerovalent Iron ◽  
Iron Particles ◽  
Chromium Vi ◽  
Nanoscale Zerovalent Iron

REMOVAL OF ARSENATE (V) BY SURFACTANT-MODIFIED ACTIVATED CARBON

2012 ◽  
Vol 11 (8) ◽  
pp. 1433-1438 ◽  
Author(s):  
Jinren Ni ◽  
Guangzhi Zhang ◽  
Hao Hu ◽  
Weiling Sun ◽  
Bin Zhao ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Modified Activated Carbon

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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