Kinetics of Carbon Tetrachloride Reduction at an Oxide-Free Iron Electrode

1997 ◽  
Vol 31 (8) ◽  
pp. 2385-2391 ◽  
Author(s):  
Michelle M. Scherer ◽  
John C. Westall ◽  
Margaret Ziomek-Moroz ◽  
Paul G. Tratnyek
Keyword(s):  
Carbon Tetrachloride ◽  
Iron Electrode ◽  
Free Iron ◽  
Kinetics Of

Carbon tetrachloride biodegradation in a fixed-biofilm reactor and its kinetic study

1998 ◽  
Vol 38 (8-9) ◽  
pp. 155-162 ◽  
Author(s):  
G. Jin ◽  
A. J. Englande
Keyword(s):  
Carbon Tetrachloride ◽  
Continuous Flow ◽  
Model Comparison ◽  
Biofilm Reactor ◽  
Pseudomonas Cepacia ◽  
Initial Concentration ◽  
Biphasic Model ◽  
Providencia Stuartii ◽  
Kinetics Of ◽  
Fixed Biofilm

Kinetics of Carbon Tetrachloride biodegradation are evaluated in a continuous-flow fixed-biofilm reactor with controlled initial redox potential. The column was seeded with a mixed culture of indigenous microorganisms Pseudomonas cepacia and Providencia stuartii. The fixed biofilm reactor exhibited 98%–99.9% biodegradation of CT introduced into the reactor at an initial concentration of about 200 μg/l for retention times of 1 to 4 days respectively. Four models were employed to evaluate the kinetics of CT biodegradation. These included: Eckenfelder (1989), Arvin (1991), Bouwer and McCarty (1985) and a biphasic model. Comparison of calculated results with observed results between these models agreed very closely to each other (0.968 < R2 < 0.999). Predicted performance was best described by the model of Bouwer and McCarty (1985). However, the biphasic and Eckenfelder models provided excellent correlations and were much simpler to apply. The biphasic model yielded very good correlations of the data for all detention times evaluated; whereas, the Eckenfelder model effected comparable results only at the longer retention times studied.

Kinetics of reactive absorption of carbon dioxide with solutions of aniline in carbon tetrachloride and chloroform

2008 ◽  
Vol 136 (2-3) ◽  
pp. 349-357 ◽  
Author(s):  
Srikanta Dinda ◽  
Anand V. Patwardhan ◽  
Swapna Rekha Panda ◽  
Narayan C. Pradhan
Keyword(s):  
Carbon Dioxide ◽  
Carbon Tetrachloride ◽  
Reactive Absorption ◽  
Kinetics Of

Effect of Pressure on the Rates of Reaction of Radiolysis Intermediates in Liquid n-Hexane

1971 ◽  
Vol 49 (16) ◽  
pp. 2651-2656 ◽  
Author(s):  
Kamal N. Jha ◽  
Gordon R. Freeman
Keyword(s):  
Carbon Tetrachloride ◽  
Hydrogen Atom ◽  
Pressure Dependence ◽  
Diffusion Coefficients ◽  
Effect Of Pressure ◽  
Scavenging Efficiency ◽  
Kinetics Of ◽  
Positive Ion

The yield of hydrogen from pure hexane, G(H2) = 5.3 ± 0.2 was independent of pressure in the range 1 bar to 4.6 kbars. The G values of H2, HD, and D2 obtained from 11 mol% C6D14 in C6H14 were independent of pressure and were respectively, 4.85, 0.34, and 0.11. The electron and hydrogen atom scavenging efficiencies of carbon tetrachloride and hexadiene-1,3, and the hydrogen atom scavenging efficiency of hexene-1 were independent of pressure. The positive ion scavenging efficiencies of benzene and aniline increased with increasing pressure. The volume of activation for the hydrogen atom reaction with n-hexane is essentially the same as that for the reaction with hexene-1. The pressure dependence of the charge scavenging reactions has been interpreted in terms of the kinetics of spur processes. The treatment is consistent with the fact that the efficiency of the electron scavenging reactions is independent of pressure. The increased efficiency of positive ion reaction under pressure implies that the ratio of the diffusion coefficients of the radiolytic positive ion and electron, D+/D−, increases with increasing pressure.

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