Mutual-activation between Zero-Valent iron and graphitic carbon for Cr(VI) Removal: Mechanism and inhibition of inherent Side-reaction

2022 ◽  
Vol 608 ◽  
pp. 588-598
Author(s):  
Ge Gao ◽  
Lei Zhang ◽  
Yixin Shi ◽  
Shengjiong Yang ◽  
Gen Wang ◽  
...  
Keyword(s):  
Side Reaction ◽  
Graphitic Carbon ◽  
Zero Valent Iron ◽  
Removal Mechanism

Removal of U(VI) from Leaching Process Wastewater by Zero-Valent Iron

2014 ◽  
Vol 539 ◽  
pp. 815-818
Author(s):  
Hua Zeng ◽  
Wei Ming Zhang ◽  
Yi Ran Li ◽  
Yuan Yuan Liu
Keyword(s):  
Iron Powder ◽  
Ph Value ◽  
Removal Rate ◽  
Zero Valent Iron ◽  
Removal Mechanism ◽  
Leaching Process ◽  
Process Wastewater ◽  
Better Than

The removing effectiveness of U(VI) in leaching process wastewater by Zero-valent iron (ZVI)(iron powder and waste scrap) has been studied. The effects of the dosage of ZVI, pH, shaking time and temperature on treatment effiency are investigated. The results showed that: ZVI has very good removal effect on U (VI), and when pH value of solution is 6, the dosage of ZVI is 1.5 g, the shaking time is 80 min, the removal rate reached 98.6%.The removing efficiency of iron powder is sightly better than waster scrap.Acorrding to the experiment, the optimum experiment conditions and the influence of these parameters are obtained. The removal mechanism of U(VI) in leaching process wastewater by ZVI is discussed.

Treatment of Dye Wastewater by Zero Valent Iron Composited Organobentonite

2011 ◽  
Vol 340 ◽  
pp. 229-235 ◽  
Author(s):  
Jian Feng Ma ◽  
Jian Ming Yu ◽  
Bing Ying Cui ◽  
Ding Long Li ◽  
Juan Dai
Keyword(s):  
Crystal Structure ◽  
Zero Valent Iron ◽  
Orange Ii ◽  
Dye Wastewater ◽  
Removal Mechanism ◽  
X Ray Diffraction ◽  
X Ray ◽  
Secondary Pollution ◽  
Novel Material ◽  
Adsorption Amount

A novel material, zero valent iron composited organobentonite (NZVI-OB), was synthesized to adsorb dye from wastewater and to degrade the dye for avoiding secondary pollution. The crystal structure was characterized with X-ray diffraction (XRD). The effect of initial Orange II concentration and reaction time on the removal of Orange II by the NZVI-OB was studied. And the removal mechanism of Orange II was discussed. The results show that the Orange II can be removed by NZVI-OB efficiently. The maximal adsorption amount is 112.66 mg/g. The iron can effectively degrade the organic compounds after adsorption pollution, the carbon contents of organic pollutions after catalyzed and oxidized by the iron are lowered to the 19% of the original.

scholarly journals MOF derived Novel Zero-valent Iron @ Graphitic Carbon-based Nanoreactors for Selective Reduction of Hazardous 4-Nitrophenol

2021 ◽  
pp. 100081
Author(s):  
Iqra Asif ◽  
Nadeem Baig ◽  
Muhammad Sher ◽  
Anwar Ul-Hamid ◽  
Muhammad Altaf ◽  
...  
Keyword(s):  
Selective Reduction ◽  
Graphitic Carbon ◽  
Zero Valent Iron ◽  
Carbon Based

scholarly journals Synthesis, Cr(VI) removal performance and mechanism of nanoscale zero-valent iron modified potassium-doped graphitic carbon nitride

2020 ◽  
Vol 81 (9) ◽  
pp. 1840-1851 ◽  
Author(s):  
Jing Guo ◽  
Tao Chen ◽  
Xiaohui Zhou ◽  
Wenning Xia ◽  
Tao Zheng ◽  
...  
Keyword(s):  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Zero Valent Iron ◽  
Graphitic Carbon Nitride ◽  
Maximum Adsorption Capacity ◽  
X Ray Diffraction ◽  
Chromium Vi ◽  
Nanoscale Zero Valent Iron ◽  
Metal Treatment ◽  
Terminal Amino

Abstract A novel composite (nZVI@K-GCN) was firstly synthesized by liquid phase reducing nanoscale zero-valent iron (nZVI) on potassium-doped graphitic carbon nitride (K-GCN). The results of Fourier transform infrared (FTIR) spectrometry, X-ray diffraction (XRD), scanning electron microscopy (SEM) and Brunauer–Emmett–Teller (BET) suggested that nZVI@K-GCN possessed abundant active functional groups such as terminal amino-groups (-NH or -NH2 groups) and -OH, and the specific surface area and pore volume from BET of nZVI@K-GCN were 4.7 times and 3.7 times higher than that of graphitic carbon nitride (GCN), respectively. These properties showed that the composite was especially suitable for heavy metal treatment. The application of the composite in the removal of chromium(VI) from aqueous solution showed that the maximum adsorption capacity of nZVI@K-GCN towards Cr(VI) was 68.6 mg/g at 308 K when the initial concentration of Cr(VI) was 30 mg/L, and more than 99% removal was obtained at pH = 3. This adsorption was an endothermic and spontaneous process. XPS patterns and batch experiments proved that complexation, electrostatic attraction and reduction precipitation were the main adsorption mechanism for Cr(VI) on nZVI@K-GCN.

Selenate removal by zero-valent iron in oxic condition: the role of Fe(II) and selenate removal mechanism

2015 ◽  
Vol 23 (2) ◽  
pp. 1081-1090 ◽  
Author(s):  
In-Ho Yoon ◽  
Sunbaek Bang ◽  
Kyoung-Woong Kim ◽  
Min Gyu Kim ◽  
Sang Yoon Park ◽  
...  
Keyword(s):  
Zero Valent Iron ◽  
Removal Mechanism ◽  
Oxic Condition
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