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301.
Carbon and hydrogen isotope fractionation by microbial methane oxidation: improved determination 总被引:1,自引:0,他引:1
Mahieu K Visscher AD Vanrolleghem PA Cleemput OV 《Waste management (New York, N.Y.)》2006,26(4):389-398
Isotope fractionation is a promising tool for quantifying methane oxidation in landfill cover soils. For good quantification an accurate determination of the isotope fractionation factor (alpha) of methane oxidation based on independent batch experiments with soil samples from the landfill cover is required. Most studies so far used data analysis methods based on approximations of the Rayleigh model to determine alpha. In this study, the two most common approximations were tested, the simplified Rayleigh approach and the Coleman method. To do this, the original model of Rayleigh was described in measurable variables, methane concentration and isotopic abundances, and fitted to batch oxidation data by means of a weighted non-linear errors-in-variables regression technique. The results of this technique were used as a benchmark to which the results of the two conventional approximations were compared. Three types of batch data were used: simulated data, data obtained from the literature, and data obtained from new batch experiments conducted in our laboratory. The Coleman approximation was shown to be acceptable but not recommended for carbon fractionation (error on alpha-1 up to 5%) and unacceptable for hydrogen fractionation (error up to 20%). The difference between the simplified Rayleigh approach and the exact Rayleigh model is much smaller for both carbon and hydrogen fractionation (error on alpha-1<0.05%). There is also a small difference when errors in both variables (methane concentration and isotope abundance) are accounted for instead of assuming an error-free independent variable. By means of theoretical calculations general criteria, not limited to methane, (13)C, or D, were developed for the validity of the simplified Rayleigh approach when using labelled compounds. 相似文献
302.
Islam Md Tasbirul Huda Nazmul Baumber Alex Hossain Rumana Sahajwalla Veena 《Environmental science and pollution research international》2022,29(39):58980-59001
Environmental Science and Pollution Research - Consumer behavior is a critical consideration for the development of sustainable waste management systems, including waste batteries, which pose a... 相似文献
303.
Adebayo Tomiwa Sunday Acheampong Alex O. 《Environmental science and pollution research international》2022,29(7):9867-9882
Environmental Science and Pollution Research - Sustainable development policies for achieving net-zero emissions require understanding the factors that influence carbon emissions. Capitalizing on... 相似文献
304.
Saxena Abhishek Norton Brian Goel Varun Singh Desh Bandhu 《Environmental science and pollution research international》2022,29(39):58537-58560
Environmental Science and Pollution Research - The successful use of solar energy for cooking requires the systems adopted not only to have technical attributes that conveniently address specific... 相似文献