scholarly journals Activation of Aspen Wood with Carbon Dioxide and Phosphoric Acid for Removal of Total Organic Carbon from Oil Sands Produced Water: Increasing the Yield with Bio-Oil Recycling

Materials ◽  
2016 ◽  
Vol 9 (1) ◽  
pp. 20 ◽  
Author(s):  
Andrei Veksha ◽  
Tazul Bhuiyan ◽  
Josephine Hill
Keyword(s):  
Carbon Dioxide ◽  
Organic Carbon ◽  
Phosphoric Acid ◽  
Total Organic Carbon ◽  
Oil Sands ◽  
Produced Water ◽  
Aspen Wood ◽  
Bio Oil

scholarly journals Estimation of atmospheric total organic carbon (TOC) – paving the path towards carbon budget closure

2019 ◽  
Vol 19 (1) ◽  
pp. 459-471 ◽  
Author(s):  
Mingxi Yang ◽  
Zoë L. Fleming
Keyword(s):  
Carbon Dioxide ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Organic Compounds ◽  
Carbon Budget ◽  
Dimethyl Sulfide ◽  
Anthropogenic Activity ◽  
Heated Sample ◽  
Diurnal Variability ◽  
Marine Air

Abstract. The atmosphere contains a rich variety of reactive organic compounds, including gaseous volatile organic carbon (VOCs), carbonaceous aerosols, and other organic compounds at varying volatility. Here we present a novel and simple approach to measure atmospheric non-methane total organic carbon (TOC) based on catalytic oxidation of organics in bulk air to carbon dioxide. This method shows little sensitivity towards humidity and near 100 % oxidation efficiencies for all VOCs tested. We estimate a best-case hourly precision of 8 ppb C during times of low ambient variability in carbon dioxide, methane, and carbon monoxide (CO). As proof of concept of this approach, we show measurements of TOC+CO during August–September 2016 from a coastal city in the southwest United Kingdom. TOC+CO was substantially elevated during the day on weekdays (occasionally over 2 ppm C) as a result of local anthropogenic activity. On weekends and holidays, with a mean (standard error) of 102 (8) ppb C, TOC+CO was lower and showed much less diurnal variability. TOC+CO was significantly lower when winds were coming off the Atlantic Ocean than when winds were coming off land if we exclude the weekday daytime. By subtracting the estimated CO from TOC+CO, we constrain the mean (uncertainty) TOC in Atlantic-dominated air masses to be around 23 (±≥8) ppb C during this period. A proton-transfer-reaction mass spectrometer (PTR-MS) was deployed at the same time, detecting a large range of organic compounds (oxygenated VOCs, biogenic VOCs, aromatics, dimethyl sulfide). The total speciated VOCs from the PTR-MS, denoted here as Sum(VOC), amounted to a mean (uncertainty) of 12 (±≤3) ppb C in marine air. Possible contributions from a number of known organic compounds present in marine air that were not detected by the PTR-MS are assessed within the context of the TOC budget. Finally, we note that the use of a short, heated sample tube can improve the transmission of organics to the analyzer, while operating our system alternately with and without a particle filter should enable a better separation of semi-volatile and particulate organics from the VOCs within the TOC budget. Future concurrent measurements of TOC, CO, and a more comprehensive range of speciated VOCs would enable a better characterization and understanding of the atmospheric organic carbon budget.

scholarly journals Optimization of the adsorption of total organic carbon from produced water using functionalized multi-walled carbon nanotubes

Heliyon ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. e05866
Author(s):  
T.L. Adewoye ◽  
O.O. Ogunleye ◽  
A.S. Abdulkareem ◽  
T.O. Salawudeen ◽  
J.O. Tijani
Keyword(s):  
Carbon Nanotubes ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Produced Water ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

scholarly journals Socony Mobil Radiocarbon Dates I

1960 ◽  
Vol 2 ◽  
pp. 97-111 ◽  
Author(s):  
E. E. Bray ◽  
W. H. Burke
Keyword(s):  
Carbon Dioxide ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Proportional Counter ◽  
Organic Material ◽  
Acid Treatment ◽  
Radiocarbon Dates ◽  
Counter Method ◽  
Mesh Screen

The samples in this list were measured by the methane proportional counter method reported by Burke and Meinschein (1955). Shell samples were mechanically cleaned and washed with water. Where necessary, cold, very dilute HCI was used to remove the powdery exterior. Sedimentary wood and mud or clay samples were treated with hot concentrated HCI and washed with water before burning. Four other types of materials recovered from sediments were dated: (1) the total organic carbon, (2) benzene-soluble organic material, (3) foraminiferal tests, and (4) “dispersed carbonate”. The foraminiferal samples were recovered from the sediment by washing on a 120-mesh screen. These were then converted to carbon dioxide by acid treatment. “Dispersed carbonate” was recovered in the form of CO2, by acid (HCI) treatment of the sediment wash which had been depleted of Foraminifera. The total organic carbon samples were recovered by combustion to CO2 after all carbonates had been removed by acid treatment. Organic extractables were also converted to CO2 by combustion.

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