Comparative studies of H2O2/Fe(II)/formic acid, sodium percarbonate/Fe(II)/formic acid and calcium peroxide/Fe(II)/formic acid processes for degradation performance of carbon tetrachloride

2018 ◽  
Vol 344 ◽  
pp. 453-461 ◽  
Author(s):  
Wenchao Jiang ◽  
Ping Tang ◽  
Shuguang Lu ◽  
Yunfei Xue ◽  
Xiang Zhang ◽  
...  
Keyword(s):  
Carbon Tetrachloride ◽  
Formic Acid ◽  
Comparative Studies ◽  
Calcium Peroxide ◽  
Sodium Percarbonate

scholarly journals Enhanced redox degradation of chlorinated hydrocarbons by the Fe(II)-catalyzed calcium peroxide system in the presence of formic acid and citric acid

2019 ◽  
Vol 368 ◽  
pp. 506-513 ◽  
Author(s):  
Wenchao Jiang ◽  
Ping Tang ◽  
Shuguang Lyu ◽  
Mark L. Brusseau ◽  
Yunfei Xue ◽  
...  
Keyword(s):  
Citric Acid ◽  
Formic Acid ◽  
Chlorinated Hydrocarbons ◽  
Calcium Peroxide

Molecular scale investigations of the reactivity of magnetite with formic acid, pyridine, and carbon tetrachloride

2006 ◽  
Vol 70 (14) ◽  
pp. 3593-3612 ◽  
Author(s):  
Richard S. Cutting ◽  
Chris A. Muryn ◽  
Geoffrey Thornton ◽  
David J. Vaughan
Keyword(s):  
Carbon Tetrachloride ◽  
Formic Acid ◽  
Molecular Scale

Ethanol enhanced carbon tetrachloride degradation in Fe(II) activated calcium peroxide system

2018 ◽  
Vol 205 ◽  
pp. 105-112 ◽  
Author(s):  
Ping Tang ◽  
Wenchao Jiang ◽  
Shuguang Lyu ◽  
Zhaofu Qiu ◽  
Qian Sui
Keyword(s):  
Carbon Tetrachloride ◽  
Calcium Peroxide

scholarly journals Applications of particulate oxygen-generating substances (POGS) in the bioartificial pancreas

2017 ◽  
Vol 5 (12) ◽  
pp. 2437-2447 ◽  
Author(s):  
John P. McQuilling ◽  
Sivanandane Sittadjody ◽  
Samuel Pendergraft ◽  
Alan C. Farney ◽  
Emmanuel C. Opara
Keyword(s):  
Bioartificial Pancreas ◽  
Calcium Peroxide ◽  
Sodium Percarbonate

In this work, sodium percarbonate and calcium peroxide were utilized as an oxygen source to improve islet viability and functionality.

scholarly journals The performance of chlorobenzene degradation in groundwater: comparison of hydrogen peroxide, nanoscale calcium peroxide and sodium percarbonate activated with ferrous iron

2020 ◽  
Author(s):  
Xuecheng Sun ◽  
Xiaogang Gu ◽  
Shuguang Lyu
Keyword(s):  
Hydrogen Peroxide ◽  
Ferrous Iron ◽  
Removal Rate ◽  
Degradation Mechanism ◽  
Molar Ratio ◽  
Liquid Chromatograph ◽  
Calcium Peroxide ◽  
Sodium Percarbonate ◽  
Molar Ratios ◽  
Resonance Test

Abstract The chlorobenzene (CB) degradation performances by various oxidants, including hydrogen peroxide (H2O2), nanoscale calcium peroxide (nCaO2) and sodium percarbonate (SPC), activated with ferrous iron (Fe(II)) were investigated and thoroughly compared. The results showed that all tested systems had strong abilities to degrade CB. The CB removal rate increased with increasing dosages of oxidants or Fe(II) because the generation of reactive oxygen species could be promoted with the chemical dosages' increase. Response surface and contour plots showed that CB could achieve a better removal performance at the same H2O2 and Fe(II) molar content, but the Fe(II) dosage was higher than that of oxidants in the nCaO2 and SPC systems. The optimal molar ratios of H2O2/Fe(II)/CB, nCaO2/Fe(II)/CB and SPC /Fe(II)/CB were 5.2/7.6/1, 8/8/1, and 4.5/8/1, respectively, in which 98.1%, 98%, and 96.4% CB removals could be obtained in 30 min reaction. The optimal pH condition was around 3, while CB removal rates were less than 20% in all three systems when the initial pH was adjusted to 9. The oxidative hydroxyl radicals (HO•) and singlet oxygen (1O2) had been detected by the electron paramagnetic resonance test. Based upon the results of liquid chromatograph-mass spectrometer analysis, the pathways of CB degradation were proposed, in which 1O2 roles were elaborated innovatively in the CB degradation mechanism. The CB degradation performance was significantly affected in actual groundwater, while increasing the molar ratio of oxidant/Fe(II)/CB was an effective way to overcome the adverse effects caused by the complex of actual groundwater matrix.

THE EFFECTS OF CHAIN LENGTH ON THE INFRARED SPECTRA OF FATTY ACIDS AND METHYL ESTERS

1962 ◽  
Vol 40 (2) ◽  
pp. 321-333 ◽  
Author(s):  
R. Norman Jones
Keyword(s):  
Fatty Acids ◽  
Carbon Tetrachloride ◽  
Chain Length ◽  
Infrared Spectra ◽  
Comparative Studies ◽  
Carbon Disulphide ◽  
Methyl Esters ◽  
Straight Chain ◽  
Group Frequency ◽  
Chain Fatty Acids

The infrared spectra of straight-chain fatty acids and their methyl esters have been measured over the range 1500–650 cm−1 in carbon tetrachloride and carbon disulphide solution. The effects of the chain length on the peak intensities of the bands have been analyzed in relation to the group frequency assignments derived from comparative studies of deuterium-substituted methyl laurates.

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