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- W4237458052 abstract "The effect of nitrate, ammonium and urea on the mineralization of [14C]hexadecane (C16H34) and on denitrification was evaluated in two soils contaminated with diesel fuel. In soil A, addition of N fertilizers did not stimulate or inhibit background hexadecane mineralization (4.3 mg C16H34 kg−1 day−1). In soil B, only NaNO3 stimulated hexadecane mineralization (0.91 mg C16H34 kg−1 day−1) compared to soil not supplemented with any nitrogen nutrient (0.17 mg C16H34 kg−1 day−1). Hexadecane mineralization was not stimulated in this soil by NH4NO3 (0.13 mg C16H34 kg−1 day−1), but the addition of NH4Cl or urea suppressed hexadecane mineralization (0.015 mg C16H34 kg−1 day−1). Addition of 2 kPa C2H2 did not inhibit the mineralization process in either soil. Denitrification occurred in both soils studied when supplemented with NaNO3 and NH4NO3, but was not detected with other N sources. Denitrification started after a longer lag in soil A (10 days) than in soil B (4 days). In soil A microcosms supplemented with NaNO3 or NH4NO3, rates of denitrification were 20.6 and 13.6 mg NO3− kg−1 day−1, respectively, and in soil B, they were 18.5 and 12.5 mg NO3− kg−1 day−1, respectively. We conclude that denitrification may lead to a substantial loss of nitrate, making it unavailable to the mineralizing bacterial population. Nitrous oxide was an important end-product accounting for 30–100% of total denitrification. These results indicate the need for preliminary treatability studies before implementing full-scale treatment processes incorporating commercial fertilizers." @default.
- W4237458052 created "2022-05-12" @default.
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- W4237458052 date "2000-04-01" @default.
- W4237458052 modified "2023-09-25" @default.
- W4237458052 title "Hexadecane mineralization and denitrification in two diesel fuel-contaminated soils" @default.
- W4237458052 doi "https://doi.org/10.1016/s0168-6496(99)00103-8" @default.
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