Degradation of Tetrabromobisphenol A by Sulfidated Nanoscale Zerovalent Iron in a Dynamic Two-Step Anoxic/Oxic Process

2019 ◽  
Vol 53 (14) ◽  
pp. 8105-8114 ◽  
Author(s):  
Jun Wu ◽  
Jian Zhao ◽  
Jun Hou ◽  
Raymond Jianxiong Zeng ◽  
Baoshan Xing
Keyword(s):  
Zerovalent Iron ◽  
Tetrabromobisphenol A ◽  
Nanoscale Zerovalent Iron

scholarly journals Feasibility of Using Sequential Sulfurized Nanoscale Zerovalent Iron-Persulfate Process to Degrade Tetrabromobisphenol A

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Tuan Nguyen Quoc ◽  
Khanh Hoang Nguyen ◽  
Huong Ngo Thi Thuy ◽  
Nguyen Thi Hanh Tien ◽  
Chau Tran Thi Minh ◽  
...  
Keyword(s):  
High Performance ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Initial Conditions ◽  
Zerovalent Iron ◽  
Tetrabromobisphenol A ◽  
Nanoscale Zerovalent Iron ◽  
Promising Strategy ◽  
Zerovalent Iron Nanoparticles ◽  
Anoxic Environment

This study proposed a sequential redox process to partially degrade tetrabromobisphenol A (TBBPA) within a reactor to a great extent. After 72 hours in an anoxic environment, 20 ppm of TBBPA could be effectively degraded by sulfurized zerovalent iron nanoparticles (S-nZVI) at concentrations of 2 g L-1 and 4 g L-1. Biphenol A (BPA) together with tri-, di-, and monobromobisphenol A was detected by high-performance liquid chromatography (HPLC) suggesting that TBBPA was debrominated by S-nZVI in a stepwise manner. Following the S-nZVI treatment, a persulfate-advanced oxidation process (PS-AOP) system with persulfate concentrations varied from 5 to 20 mM was incorporated to degrade the final debrominated byproduct, BPA, for 2 hours. The two-stage anoxic/oxic reactions at the same reactor with initial conditions (0.037 mM TBBPA, 4 g L-1 of S-nZVI, pH 6 in anoxic stage, 20 mM of PS in the latter oxic stage) were investigated. The sulfurized layer played an important role in such a system and hypothetically contributes to increasing electron transfer from Fe0 core as well as hydrophobicity of the NP surface. It was demonstrated that the S-nZVI/PS-AOP system could effectively remediate TBBPA and BPA and consequently provide a promising strategy to remedy brominated organic pollutants in the environment.

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.

scholarly journals Effects of nitrate on the treatment of lead contaminated groundwater by nanoscale zerovalent iron

2014 ◽  
Vol 280 ◽  
pp. 504-513 ◽  
Author(s):  
Yiming Su ◽  
Adeyemi S. Adeleye ◽  
Xuefei Zhou ◽  
Chaomeng Dai ◽  
Weixian Zhang ◽  
...  
Keyword(s):  
Zerovalent Iron ◽  
Contaminated Groundwater ◽  
Nanoscale Zerovalent Iron

In vitro biocompatibility of nanoscale zerovalent iron particles (NZVI) synthesized using tea polyphenols

2010 ◽  
Vol 12 (1) ◽  
pp. 114-122 ◽  
Author(s):  
Mallikarjuna N. Nadagouda ◽  
Alicia B. Castle ◽  
Richard C. Murdock ◽  
Saber M. Hussain ◽  
Rajender S. Varma
Keyword(s):  
Tea Polyphenols ◽  
Zerovalent Iron ◽  
Iron Particles ◽  
Nanoscale Zerovalent Iron ◽  
In Vitro Biocompatibility

Removal of Lead by Nanoscale Zerovalent Iron in Surfacewater

InCIEC 2015 ◽  
2016 ◽  
pp. 63-71 ◽  
Author(s):  
Raja Hafizzuddin Raja Amir Iskandar ◽  
Jalina Kassim ◽  
Mohd Fozi Ali ◽  
Amnorzahira Amir
Keyword(s):  
Zerovalent Iron ◽  
Nanoscale Zerovalent Iron
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