title: [Study on degradation of polycyclic aromatic hydrocarbons (PAHs) with different additional carbon sources in aged contaminated soil].
abstract: This study was conducted with different additional carbon sources (such as: glucose, DL-malic acid, citrate, urea and ammonium acetate) to elucidate the degradation of polycyclic aromatic hydrocarbons (PAHs) in aged contaminated soil under an indoor simulation experiment. The results showed that the quantity of CO2 emission in different additional carbon sources treatments was obviously much more than that of check treatment in the first week, and the quantity of CO2 emission in DL-malic acid treatment was the largest. The average CO2 production decreased in an order urea > glucose approximately citrate approximately DL-malic acid approximately ammonium acetate > check. Meanwhile, the amount of volatized PAHs in applied carbon sources treatments was significantly less than that in check treatment. The amount of three volatized PAHs decreased in an order phenanthrene > fluoranthene > benzo(b)fluoranthene. Compared with the check treatment, the average degradation rates of the three PAHs were significantly augmented in the supplied carbon sources treatments, in which rates of the three PAHs were much higher in DL-malic acid and urea treatments than those in other treatments. The largest proportion of residual was benzo(b)fluoranthene (from 72% to 81%) among three PAHs compounds, followed by fluoranthene (from 53% to 70% ) and phenanthrene (from 27% to 44%).
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China. yinchunqin@126.com
authors.forename: Chun-Qin
authors.initials: CQ
authors.lastname: Yin
authors.forename: Xin
authors.initials: X
authors.lastname: Jiang
authors.forename: Fang
authors.initials: F
authors.lastname: Wang
authors.forename: Cong-Ying
authors.initials: CY
authors.lastname: Wang
mesh_terms: D001673:Biodegradation, Environmental; D002244:Carbon / Q000378:metabolism*; D019343:Citric Acid / Q000378:metabolism; D003198:Computer Simulation; D005449:Fluorenes / Q000378:metabolism; D005947:Glucose / Q000378:metabolism; D008293:Malates / Q000378:metabolism; D011084:Polycyclic Aromatic Hydrocarbons / Q000378:metabolism*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D005449:Fluorenes; D008293:Malates; D011084:Polycyclic Aromatic Hydrocarbons; D012989:Soil Pollutants; D019343:Citric Acid; D002244:Carbon; C030298:malic acid; C006703:benzo(b)fluoranthene; D005947:Glucose