Development of Engineered Natural Organic Sorbents for Environmental Applications: 3. Reducing PAH Mobility and Bioavailability in Contaminated Soil and Sediment Systems

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• 作者：Jixin Tang ; Elijah J. Petersen ; Qingguo Huang ; Walter J. Weber ; Jr.
• 刊名：Environmental Science & Technology
• 出版年：2007
• 出版时间：April 15, 2007
• 年：2007
• 卷：41
• 期：8
• 页码：2901 - 2907
• 全文大小：237K
• 年卷期：v.41,no.8(April 15, 2007)
• ISSN：1520-5851

文摘

The effects of engineered natural organic amendments ontwo measures of the environmental "availability" ofpolycyclic aromatic hydrocarbons (PAHs) associated withsoil and sediment samples are assessed. Two soilsspiked with pyrene alone and a sediment spiked with amixture of 4 PAH compounds were amended with raw orsuperheated-water processed peat or soybean stalks,then aged for periods of either 62 or 105 days. The agedsoils were then examined with respect to bioaccumulationof spiked pyrene by earthworms (Eisenia foetida), and toits human bioaccessibility as measured by extraction withsimulated gastrointestinal fluid. Additions of processedamendments reduced both measures of availability by factorsranging from 7.6 to 27.0 for earthworm bioaccumulationand from 2.3 to 8.8 for gastrointestinal extractability. All PAHcompounds spiked to the sediment were reduced tovarying extents in their availabilities to E. foetida andleachabilities by water by both processed and raw organicamendments.