Sonolytic degradation of pesticide metazachlor in water: The role of dissolved oxygen and ferric sludge in the process intensification

2019 ◽  
Vol 7 (3) ◽  
pp. 103095 ◽  
Author(s):  
M. Kask ◽  
M. Krichevskaya ◽  
J. Bolobajev
Keyword(s):  
Dissolved Oxygen ◽  
Process Intensification ◽  
Sonolytic Degradation

scholarly journals The simultaneous removal of bisphenol A, manganese and ammonium from groundwater by MeOx: The role of chemical catalytic oxidation for bisphenol A

2021 ◽  
Author(s):  
Yingming Guo ◽  
Ben Ma ◽  
Jianxiong Huang ◽  
Jing Yang ◽  
Ruifeng Zhang
Keyword(s):  
Oxide Film ◽  
Bisphenol A ◽  
Dissolved Oxygen ◽  
Oxidation Process ◽  
Pilot Scale ◽  
Simultaneous Removal ◽  
Chemical Forms ◽  
Synergy Effect ◽  
Iron And Manganese

Abstract The iron and manganese oxide filter film (MeOx) were used to research the simultaneous removal of bisphenol A (BPA), manganese (Mn2+) and ammonium (NH4+) in a pilot-scale filter system. We found that 0.52 mg/L of BPA could be removed while consuming 5.44 mg/L of dissolved oxygen (DO). Since the oxidation process of NH4+ and BPA both consume the DO in water, the presence of NH4+ can hinder the removal of BPA. The presence of Mn2+ in water had a synergy effect on the BPA removal. The filter film was characterized by SEM, XRD and XPS. Some substances were generated to block the pores of the oxide film, and a small amount of film was found to crack and fall off. The elemental composition of C and O were both increased by about 9%, the composition of Mn was decreased from 63.48% to 44.55%, and the reduced manganese substance might affect the activity of the oxide film. The main chemical forms of MeOx are Mn6O12·3H2O, MnFe2O4 or Mn3O4. The decrease in the removal efficiency of BPA was mainly due to the C-containing intermediate [−CH2C − H(OH)]n covering the surface of the oxide film and blocking the pore size of the film.

Design and synthesis of novel porphyrinated polyimide nanofibers as dissolved oxygen sensor: The role of electro-activity and orientation

2019 ◽  
Vol 161 ◽  
pp. 79-88 ◽  
Author(s):  
Huanyu Lei ◽  
Jiaming Lu ◽  
Guoqing Dong ◽  
Guofeng Tian ◽  
Shengli Qi ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Oxygen Sensor ◽  
Design And Synthesis

Process intensification in chemical engineering: general trends and Russian contribution

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Rufat S. Abiev
Keyword(s):  
Energy Use ◽  
Chemical Engineering ◽  
Raw Materials ◽  
Process Intensification ◽  
Modern World ◽  
Simultaneous Increase ◽  
Russian Scientist ◽  
Energy Use Efficiency ◽  
Use Efficiency

Abstract Minimization of the costs with simultaneous increase in the raw materials and energy use efficiency is a challenge for the modern world. One of the most effective tools to solve this task is the use of process intensification (PI), first proposed by Ramshaw C. The incentive for process intensification, Proceedings, 1st Intl. Conf. Proc. Intensif. for Chem. Ind., 18, BHR Group, London, 1995, p. 1. and then extended by Stankiewicz AI, Moulijn JA. Process intensification: transforming chemical engineering. Chem Eng Prog 2000: 22–34. In the presented review, some principles of PI in chemical engineering and their application for wide variety of processes is discussed. The role of the Russian scientist with a research background is carried out in other countries.

The Role of Oxygen in Zone-Melting Recrystallization of Silicon-On-Insulator Films

1983 ◽  
Vol 23 ◽  
Author(s):  
John C. C. Fan ◽  
B-Y. Tsaur ◽  
C. K. Chen ◽  
J. R. Dick ◽  
L. L. Kazmerski
Keyword(s):  
Dissolved Oxygen ◽  
Mass Spectroscopy ◽  
Zone Melting ◽  
Constitutional Supercooling ◽  
Common Origin ◽  
Silicon On Insulator ◽  
Secondary Ion Mass Spectroscopy ◽  
Secondary Ion

ABSTRACTUsing secondary-ion mass spectroscopy, we have found that oxygen is strongly concentrated at the sub-boundaries in zone-melting-recrystallized silicon-on-insulator films prepared by the graphite-strip-heater technique. This observation suggests that the formation of sub-boundaries during recrystallization may be caused by constitutional supercooling resulting from the presence of oxygen that is dissolved into the molten Si zone from the adjacent SiO2 layers. Since all zone-melting-recrystallized films to date have been bordered by SiO2 layers, regardless of the heating techniques employed, the sub-boundaries almost always present in these films may well have dissolved oxygen as their common origin.

Role of dissolved oxygen on the degradation mechanism of Reactive Green 19 and electricity generation in photocatalytic fuel cell

Chemosphere ◽  
2018 ◽  
Vol 194 ◽  
pp. 675-681 ◽  
Author(s):  
Sin-Li Lee ◽  
Li-Ngee Ho ◽  
Soon-An Ong ◽  
Yee-Shian Wong ◽  
Chun-Hong Voon ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Dissolved Oxygen ◽  
Electricity Generation ◽  
Degradation Mechanism ◽  
Photocatalytic Fuel Cell ◽  
Reactive Green 19

scholarly journals Role of residual ferrites on crevice SCC of austenitic stainless steels in PWR water with high-dissolved oxygen

2020 ◽  
Vol 52 (11) ◽  
pp. 2552-2564
Author(s):  
Abdullah Sinjlawi ◽  
Junjie Chen ◽  
Ho-Sub Kim ◽  
Hyeon Bae Lee ◽  
Changheui Jang ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Stainless Steels ◽  
Austenitic Stainless Steels

scholarly journals Influence of grain size on chalcopyrite ore leaching in acidic medium

2007 ◽  
Vol 72 (8-9) ◽  
pp. 911-919 ◽  
Author(s):  
M.M. Antonijevic ◽  
G.D. Bogdanovic ◽  
S.M. Serbula ◽  
S.M. Milic
Keyword(s):  
Grain Size ◽  
Dissolved Oxygen ◽  
Sulphuric Acid ◽  
Acidic Medium ◽  
Raw Material ◽  
Leaching Rate ◽  
Acid Consumption ◽  
Leaching Solution ◽  
Chalcopyrite Ore

This work presents an investigation of column leaching of a chalcopyrite ore using sulphuric acid where dissolved oxygen and iron(III) ions play the role of oxidants. The investigations were carried out in PVC columns, diameter 110 mm and height 1000 mm, by percolation of the leaching solution through the ore layer. The influence of ore grain size on the degree of leaching and acid consumption was examined. The formation of gypsum on limestone results in the comminution of the initial raw material during leaching. The grain size of chalcopyrite was found to have no important influence on the leaching rate of copper. A higher consumption of sulphuric acid was found for the fractions (-3+1) mm, (?5+0) mm and (?5+3) mm than for the fractions (?10+5) mm, (?20+10) mm and (?20+0) mm. .

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