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论文类型：期刊论文

发表时间：2009-03-01

发表刊物：SOIL & SEDIMENT CONTAMINATION

收录刊物：SCIE、EI、Scopus

卷号：18

期号：2

页面范围：184-194

ISSN号：1532-0383

关键字：Sorption; black carbon; petroleum hydrocarbons; soil

摘要：Importance of environmental black carbon (BC) to sorption of dissolved petroleum hydrocarbons (DPH) on two soils with high BC:TOC ratios (33% and 11%, respectively) was evaluated at a relatively high concentrations (mg/L g/L range). Sorption isotherms of DPH were determined for the two original soils and soils combusted at 375C (only BC). The sorption isotherms of the original soils were linear, whereas the isotherms of the combusted soils were highly nonlinear (nF = 0.45, 0.60). It is indicated that intrinsic BC-water sorption coefficient is not possible to be used to estimate total sorption to the original soil, even in our relatively high concentrations. From the sorption isotherms, Freundlich coefficient of environmental BC sorption, KF,BCenv of 102.55 0.21 was calculated and could be used as a generic starting point for environmental modeling purposes. From the data, it could be deduced that BC was responsible for 50% of the total sorption at concentrations of 45 and 4 g/L ( g/L range), which were significantly higher than literature concentrations (ng/L range). These results demonstrate that in soil with high BC:TOC ratio BC is the most important geosorbent constituent with respect to sorption of DPH at relatively high concentrations ranged in g/L.