Remediation performance and mechanism of hexavalent chromium in alkaline soil using multi-layer loaded nano-zero-valent iron

2019 ◽  
Vol 252 ◽  
pp. 553-561 ◽  
Author(s):  
Siyu Hou ◽  
Bin Wu ◽  
Dinghua Peng ◽  
Ziru Wang ◽  
Yiyang Wang ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Zero Valent Iron ◽  
Alkaline Soil ◽  
Nano Zero Valent Iron ◽  
Performance And Mechanism

scholarly journals Almond Shell-Derived, Biochar-Supported, Nano-Zero-Valent Iron Composite for Aqueous Hexavalent Chromium Removal: Performance and Mechanisms

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 198 ◽  
Author(s):  
Yaorong Shu ◽  
Bin Ji ◽  
Baihui Cui ◽  
Yuting Shi ◽  
Jian Wang ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Zero Valent Iron ◽  
Good Effect ◽  
Isotherm Models ◽  
Almond Shell ◽  
Removal Experiments ◽  
Pseudo Second Order ◽  
Nano Zero Valent Iron ◽  
Cr Removal ◽  
Main Factor

Nano-zero-valent iron biochar derived from almond shell (nZVI-ASBC) was used for hexavalent chromium (CR) removal. Experiments showed that pH was the main factor (p < 0.01) that affected the experimental results. At a dosage of 10 mg·L−1 and pH of 2–6, in the first 60 min, nZVI-ASBC exhibited a removal efficiency of 99.8%, which was approximately 20% higher than the removal yield at pH 7–11. Fourier transform infrared spectroscopy results indicated N-H was the main functional group that influenced the chemisorption process. The pseudo second-order dynamics and Langmuir isotherm models proved to be the most suitable. Thermodynamic studies showed that the reaction was exothermic and spontaneous at low temperatures (T < 317 K). Various interaction mechanisms, including adsorption and reduction, were adopted for the removal of Cr(VI) using the nZVI-ASBC composite. The findings showed that the BC-modified nZVI prepared with almond shell exerts a good effect and could be used for the removal of Cr(VI).

Preparation of highly dispersive and antioxidative nano zero-valent iron for the removal of hexavalent chromium

Chemosphere ◽  
2021 ◽  
Vol 262 ◽  
pp. 127733 ◽  
Author(s):  
Jinhua Wu ◽  
Mingjia Yan ◽  
Sihao Lv ◽  
Weizhao Yin ◽  
Huaitian Bu ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Zero Valent Iron ◽  
Nano Zero Valent Iron

scholarly journals High dispersions of nano zero valent iron supported on biochar by one-step carbothermal synthesis and its application in chromate removal

RSC Advances ◽  
2019 ◽  
Vol 9 (22) ◽  
pp. 12428-12435 ◽  
Author(s):  
Shifeng Li ◽  
Tingting You ◽  
Yang Guo ◽  
Shuhua Yao ◽  
Shuyan Zang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Zero Valent Iron ◽  
Synthesis And Characterization ◽  
Carbothermal Synthesis ◽  
Nanoscale Zero Valent Iron ◽  
Nano Zero Valent Iron ◽  
One Step

A one-step carbothermal synthesis and characterization of biochar-supported nanoscale zero-valent iron (nZVI/BC) was performed for the removal of hexavalent chromium (Cr(vi)) from aqueous solution.

Anaerobic nano zero-valent iron granules for hexavalent chromium removal from aqueous solution

2019 ◽  
Vol 16 ◽  
pp. 100495 ◽  
Author(s):  
Ravikumar Konda Venkata Giri ◽  
Liji Susan Raju ◽  
Yarlagadda Venkata Nancharaiah ◽  
Mrudula Pulimi ◽  
Natarajan Chandrasekaran ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Zero Valent Iron ◽  
Chromium Removal ◽  
Nano Zero Valent Iron
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