Interface Mechanisms of Catalytic Ozonation with Amorphous Iron Silicate for Removal of 4-Chloronitrobenzene in Aqueous Solution

2018 ◽  
Vol 52 (3) ◽  
pp. 1429-1434 ◽  
Author(s):  
Lei Yuan ◽  
Jimin Shen ◽  
Pengwei Yan ◽  
Zhonglin Chen
Keyword(s):  
Aqueous Solution ◽  
Catalytic Ozonation ◽  
Iron Silicate ◽  
Amorphous Iron

Degradation of p-Chloronitrobenzene in Aqueous Solution by Iron Silicate Catalytic Ozonation

2014 ◽  
Vol 955-959 ◽  
pp. 2162-2168 ◽  
Author(s):  
Yue Liu ◽  
Lei Liu ◽  
Wei Jin Gong
Keyword(s):  
Aqueous Solution ◽  
Catalytic Activity ◽  
Catalytic Ozonation ◽  
Iron Silicate ◽  
Radical Scavenger ◽  
Efficient Catalyst ◽  
Green Catalyst ◽  
Hydroxyl Radical Scavenger ◽  
Radical Type ◽  
Ozonation Process

Iron silicate, a stable and efficient catalyst prepared in the laboratory has been successfully used as a catalyst combined with ozonation in the degradation of p-Chloronitrobenzene (pCNB). The catalytic ozonation removal effectiveness of pCNB was investigated under various physicochemical conditions. Both the adsorption and the single ozonation were not effective for the degradation of pCNB, but the presence of iron silicate in ozonation process could substantially enhance the pCNB removal efficiency. The hydroxyl radical scavenger experiment confirmed that iron silicate catalytic ozonation followed a radical-type mechanism. The increasing of both the iron silicate dosage and the ozone dosage could enhance the removal effectiveness of pCNB. The iron silicate catalyst could be recycled easily without decreasing any ozone catalytic activity after four successive reuses. It is concluded that the iron silicate was an efficient green catalyst for pCNB degradation in drinking water.

scholarly journals Catalytic ozonation of diclofenac with iron silicate-loaded pumice in aqueous solution

2017 ◽  
Vol 17 (5) ◽  
pp. 1458-1467
Author(s):  
Guoying Gao ◽  
Wei Chu ◽  
Zhonglin Chen ◽  
Jimin Shen
Keyword(s):  
Aqueous Solution ◽  
Synergetic Effect ◽  
Catalytic Ozonation ◽  
Iron Silicate ◽  
Oh Radicals ◽  
Ozone Decomposition ◽  
Impregnation Method ◽  
Toc Removal ◽  
Co Precipitation ◽  
Adsorption Desorption

The catalytic ozonation of diclofenac (DCF) with iron silicate-loaded pumice (FSO/PMC) in aqueous solution was investigated. FSO/PMC was synthesized by a co-precipitation–impregnation method and characterized using scanning electron microscope, N2 adsorption–desorption, X-ray fluorescence, and pHpzc measurements. Results showed that the FSO/PMC/O3 process obviously improved total organic carbon (TOC) removal efficiency from 32.3% (using sole ozonation) to 73.3% in 60 min. DCF mineralization in various oxidation processes was found to follow a two-stage pseudo-first-order kinetics. The presence of FSO/PMC effectively improved the mass transfer of ozone from gas to liquid phase and increased the efficiency of ozone decomposition, which results in the formation of •OH radicals. The ozonation of DCF generated large amounts of the ozone-refractory carboxylic acids, and these compounds were found to be continuously removed in the FSO/PMC/O3 process due to the catalytic activity of FSO/PMC. The synergetic effect between ozonation and FSO/PMC adsorption indicated that FSO/PMC is a promising catalyst for the ozonation process.

Heterogeneous catalytic ozonation of p-chloronitrobenzene (pCNB) in water with iron silicate doped hydroxylation iron as catalyst

2017 ◽  
Vol 89 ◽  
pp. 81-85 ◽  
Author(s):  
Yue Liu ◽  
Shiyuan Wang ◽  
Weijin Gong ◽  
Zhonglin Chen ◽  
Haifang Liu ◽  
...  
Keyword(s):  
Catalytic Ozonation ◽  
Iron Silicate ◽  
Heterogeneous Catalytic

Catalytic ozonation by Si-doped α-Fe2O3 for the removal of nitrobenzene in aqueous solution

2019 ◽  
Vol 228 ◽  
pp. 115766 ◽  
Author(s):  
Pengwei Yan ◽  
Jimin Shen ◽  
Lei Yuan ◽  
Jing Kang ◽  
Binyuan Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Catalytic Ozonation ◽  
Si Doped

Catalytic ozonation with silicate-based microfiltration membrane for the removal of iopamidol in aqueous solution

2021 ◽  
Vol 257 ◽  
pp. 117873
Author(s):  
Weiqiang Wang ◽  
Zhonglin Chen ◽  
Yanchi Zhou ◽  
Pengwei Yan ◽  
Jimin Shen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Catalytic Ozonation ◽  
Microfiltration Membrane
Sign in / Sign up

Export Citation Format

Share Document