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פותח על ידי קלירמאש פתרונות בע"מ -
Mechanochemical degradation of 2,4-D adsorbed on synthetic birnessite
Year:
2000
Authors :
נאסר, אחמד
;
.
Volume :
163
Co-Authors:
Nasser, A., Department of Environmental Sciences, Cook College, Rutgers University, New Brunswick, NJ 08903-0231, United States
Sposito, G., Earth Sciences Division, Mail Stop 90/1116, Lawrence B., Berkeley, CA 94720, United States
Cheney, M.A., Department of Environmental Sciences, Cook College, Rutgers University, New Brunswick, NJ 08903-0231, United States
Facilitators :
From page:
117
To page:
123
(
Total pages:
7
)
Abstract:
Mechanochemical degradation of 2,4-D (2,4-dichlorophenoxyacetic acid) adsorbed on synthetic birnessite (δ-MnO2) was investigated using heat conduction calorimetry. The overall transformation kinetics of 2,4-D on birnessite after light grinding were approximately first-order, with an apparent activation energy of approximately 37 kJ mol-1 for the range of temperatures 10-50°C. The two decomposition products detected under mechanochemical degradation and incubation were 2,4-dichlorophenol and CO2, but no consumption of gaseous oxygen was detected. A positive correlation was found between Mn(II) produced and CO2 evolved, suggesting that the decomposition of 2,4-dichlorophenol involves the oxide substrate as a source of oxygen and yields Mn(II). (C) 2000 Elsevier Science B.V.Mechanochemical degradation of 2,4-D (2,4-dichlorophenoxyacetic acid) adsorbed on synthetic birnessite (δ-MnO2) was investigated using heat conduction calorimetry. The overall transformation kinetics of 2,4-D on birnessite after light grinding were approximately first-order, with an apparent activation energy of approximately 37 kJ mol-1 for the range of temperatures 10-50 °C. The two decomposition products detected under mechanochemical degradation and incubation were 2,4-dichlorophenol and CO2, but no consumption of gaseous oxygen was detected. A positive correlation was found between Mn(II) produced and CO2 evolved, suggesting that the decomposition of 2,4-dichlorophenol involves the oxide substrate as a source of oxygen and yields Mn(II).
Note:
Related Files :
Adsorption
birnessite
Heat conduction
temperature
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/S0927-7757(99)00297-6
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
28074
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:36
Scientific Publication
Mechanochemical degradation of 2,4-D adsorbed on synthetic birnessite
163
Nasser, A., Department of Environmental Sciences, Cook College, Rutgers University, New Brunswick, NJ 08903-0231, United States
Sposito, G., Earth Sciences Division, Mail Stop 90/1116, Lawrence B., Berkeley, CA 94720, United States
Cheney, M.A., Department of Environmental Sciences, Cook College, Rutgers University, New Brunswick, NJ 08903-0231, United States
Mechanochemical degradation of 2,4-D adsorbed on synthetic birnessite
Mechanochemical degradation of 2,4-D (2,4-dichlorophenoxyacetic acid) adsorbed on synthetic birnessite (δ-MnO2) was investigated using heat conduction calorimetry. The overall transformation kinetics of 2,4-D on birnessite after light grinding were approximately first-order, with an apparent activation energy of approximately 37 kJ mol-1 for the range of temperatures 10-50°C. The two decomposition products detected under mechanochemical degradation and incubation were 2,4-dichlorophenol and CO2, but no consumption of gaseous oxygen was detected. A positive correlation was found between Mn(II) produced and CO2 evolved, suggesting that the decomposition of 2,4-dichlorophenol involves the oxide substrate as a source of oxygen and yields Mn(II). (C) 2000 Elsevier Science B.V.Mechanochemical degradation of 2,4-D (2,4-dichlorophenoxyacetic acid) adsorbed on synthetic birnessite (δ-MnO2) was investigated using heat conduction calorimetry. The overall transformation kinetics of 2,4-D on birnessite after light grinding were approximately first-order, with an apparent activation energy of approximately 37 kJ mol-1 for the range of temperatures 10-50 °C. The two decomposition products detected under mechanochemical degradation and incubation were 2,4-dichlorophenol and CO2, but no consumption of gaseous oxygen was detected. A positive correlation was found between Mn(II) produced and CO2 evolved, suggesting that the decomposition of 2,4-dichlorophenol involves the oxide substrate as a source of oxygen and yields Mn(II).
Scientific Publication
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