Enhancement of the advanced Fenton process by weak magnetic field for the degradation of 4-nitrophenol

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 13357-13365 ◽  
Author(s):  
Xinmei Xiong ◽  
Yuankui Sun ◽  
Bo Sun ◽  
Weihua Song ◽  
Jingyi Sun ◽  
...  

A superimposed WMF could significantly improve the oxidative ability of Fe0/H2O2 and widen its applicable pH range.

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1724
Author(s):  
Liping Liang ◽  
Fenfen Xi ◽  
Liubiao Cheng ◽  
Weishou Tan ◽  
Qiang Tang ◽  
...  

The coupling use of the heterogeneous Fenton-like process (zero-valent iron (Fe0)/H2O2) and weak magnetic field (MWF) for bisphenol A (BPA) abatement was systematically investigated in this study. Though both the Fe0/H2O2 and WMF-Fe0/H2O2 processes are sensitive to pH, WMF remarkably enhanced BPA removal under the pH range of 3.0–6.0 by 0.5–9.5 times. The characterization of Fe0 confirmed the role of WMF in promoting the corrosion of Fe0. Radicals, rather than Fe intermediates, were responsible for BPA degradation. Due to the presence of Cl– as the background ions and its reactivity towards HO•, reactive chlorine species (RCS, i.e., Cl• and Cl2•−) were produced and considerably contributed to BPA degradation. In addition, ~37% and 54% of degraded BPA was ascribed to RCS in the presence of 2 and 100 mM of Cl−, respectively. However, 1.9 mg/L of ClO3− was detected in the presence of 2 mM of Cl− in the WMF- Fe0/H2O2 process. HCO3− could diminish ClO3− generation significantly through transforming RCS. The concentration of ClO3− decreased by 74% and 82% with dosing 1 and 10 mM HCO3−, respectively. The results of this study suggest that the WMF-Fe0/H2O2 process is a promising approach for BPA removal.


2018 ◽  
Vol 346 ◽  
pp. 120-126 ◽  
Author(s):  
Ting Huang ◽  
Guangming Zhang ◽  
Nan Zhang ◽  
Jie Ye ◽  
Guang Xian

2021 ◽  
Vol 118 (13) ◽  
pp. 132902
Author(s):  
Zhonghui Yu ◽  
Zhaoqiang Chu ◽  
Jikun Yang ◽  
Mohammad Javad Pourhosseini Asl ◽  
Zhanmiao Li ◽  
...  

Soft Matter ◽  
2016 ◽  
Vol 12 (4) ◽  
pp. 1279-1294 ◽  
Author(s):  
Alena Antipova ◽  
Colin Denniston

We explain the motion of a micron-sized ferromagnetic disc immersed in a nematic liquid crystal under the action of a weak magnetic field using numerical simulations. We show that the disc's behaviour can be controlled by the angular speed of the magnetic field and its magnitude.


2006 ◽  
Vol 15 (06) ◽  
pp. 1263-1271 ◽  
Author(s):  
A. SOYLU ◽  
O. BAYRAK ◽  
I. BOZTOSUN

In this paper, the energy eigenvalues of the two dimensional hydrogen atom are presented for the arbitrary Larmor frequencies by using the asymptotic iteration method. We first show the energy eigenvalues for the case with no magnetic field analytically, and then we obtain the energy eigenvalues for the strong and weak magnetic field cases within an iterative approach for n=2-10 and m=0-1 states for several different arbitrary Larmor frequencies. The effect of the magnetic field on the energy eigenvalues is determined precisely. The results are in excellent agreement with the findings of the other methods and our method works for the cases where the others fail.


1971 ◽  
Vol 42 (6) ◽  
pp. 2421-2423 ◽  
Author(s):  
H. Sugai ◽  
N. Sato ◽  
Y. Hatta

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