Nitrite/Nitrous Acid Generation from the Reaction of Nitrate and Fe(II) Promoted by Photolysis of Iron–Organic Complexes

2021 ◽  
Author(s):  
Masao Gen ◽  
Ruifeng Zhang ◽  
Chak Keung Chan
Keyword(s):  
Nitrous Acid ◽  
Acid Generation ◽  
Organic Complexes

Nitrous acid generation from radiolysis of nitric acid aqueous solution under gas flow condition

2016 ◽  
Vol 54 (2) ◽  
pp. 182-187
Author(s):  
Daisuke Watanabe ◽  
Yoichi Wada ◽  
Akira Sasahira ◽  
Masashi Itori ◽  
Tetsunari Ebina
Keyword(s):  
Aqueous Solution ◽  
Nitric Acid ◽  
Flow Condition ◽  
Nitrous Acid ◽  
Gas Flow ◽  
Acid Generation ◽  
Acid Aqueous Solution

scholarly journals In-situ Nitrous Acid Generation over Silica Imidazole Catalyst for Dyes Production

2019 ◽  
Vol 14 (2) ◽  
pp. 247
Author(s):  
Kasim Mohammed Hello ◽  
Nahla Ghaze Fahad
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
Nitrous Acid ◽  
Diazonium Salt ◽  
Chemical Shifts ◽  
Imidazolium Chloride ◽  
Acid Generation ◽  
Nuclear Magnetic

The objective of this research is to prepare a new type of heterogeneous catalyst and to study its usage for in-situ nitrous acid generation to form a diazonium salt. The high pure silica (> 95%) was produced by burning the clean rice husk at 800 °C. After that, the silica was transferred to sodium silicate using 1.0 M of NaOH, followed by immobilizing with 3-(chloropropyl)triethoxysilane in a simple one-pot synthesis. Finally, the material was refluxed with (0.015 mol) of p-xylyl di-imidazolium chloride. The silicon solid-state nuclear magnetic resonance shows the Q4, Q3, T3, and T2 chemical shifts at expected position. Carbon solid-state nuclear magnetic resonance spectrum shows different peaks at different chemical shifts related to the carbon structures of the organic moieties. The catalyst is stable up to 277 ºC according to the thermal analysis. TEM images show smooth and porous regularly shaped particles with an estimation size of ca. 5 nm. Coupling reaction of aromatic compounds was carried out with a diazonium salt of aniline to yield a monoazo dye. All dyes were showed matching the elemental analysis with the theoretical calculation. Besides this, the spectrum of FT-IR and UV-Visible were recorded. The catalyst was stable, easy separation from the reaction mixture, and reusable by a simple experimental procedure. The catalyst could be used successfully for the nitrous acid generation. Copyright © 2019 BCREC Group. All rights reserved 

scholarly journals An efficient process for wastewater treatment to mitigate free nitrous acid generation and its inhibition on biological phosphorus removal

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Jianwei Zhao ◽  
Dongbo Wang ◽  
Xiaoming Li ◽  
Qi Yang ◽  
Hongbo Chen ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Phosphorus Removal ◽  
Nitrous Acid ◽  
Biological Phosphorus Removal ◽  
Free Nitrous Acid ◽  
Efficient Process ◽  
Acid Generation ◽  
Biological Phosphorus

scholarly journals Development of a Gaseous Nitrous Acid Generation System for Animal Exposure Experiments

2013 ◽  
Vol 03 (04) ◽  
Author(s):  
Masayuki Ohyama Kenji Oka
Keyword(s):  
Nitrous Acid ◽  
Generation System ◽  
Acid Generation ◽  
Animal Exposure

Free Nitrous Acid Pretreatment of Thickened Waste Activated Sludge Improves Anaerobic Degradability

2017 ◽  
Vol 2017 (1) ◽  
pp. 75-84
Author(s):  
Elsayed Elbeshbishy ◽  
Frances Okoye ◽  
Dang Ho ◽  
Siva Sarathy ◽  
Wayne Parker
Keyword(s):  
Activated Sludge ◽  
Nitrous Acid ◽  
Waste Activated Sludge ◽  
Acid Pretreatment ◽  
Free Nitrous Acid ◽  
Anaerobic Degradability

Evidence for heterogeneous formation of nitrous acid on cloud droplets

2000 ◽  
Vol 31 ◽  
pp. 352-353 ◽  
Author(s):  
K. Acker ◽  
W. Wieprecht ◽  
R. Auel ◽  
D. Kalass ◽  
D. Möller
Keyword(s):  
Nitrous Acid ◽  
Cloud Droplets ◽  
Heterogeneous Formation
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