Phenanthrene sorption to environmental black carbon in sediments from the Song-Liao watershed (China)

2009, Volume 3, Issue 4

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Frontiers of Environmental Science & Engineering >> 2009, Volume 3, Issue 4 doi: 10.1007/s11783-009-0150-0

Phenanthrene sorption to environmental black carbon in sediments from the Song-Liao watershed (China)

State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;

Available online: 2009-12-05

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Abstract

Black carbon (BC) in ten contaminated sediments from the Song-Liao watershed, NE China, was isolated upon treatments using a combustion method at 375°C, and the isolates’ sorption isotherms for phenanthrene (Phen) were determined. All sorption isotherms were nonlinear and fitted well by the Freundlich model. A negative relation was found between Freundlich sorption nonlinearity parameter ( values) and BC/total organic carbon (TOC) content of the original sediments (=0.687, <0.01), indicating the dominance of BC in Phen sorption nonlinearity. The BC isolates from this industrialized region had values of 0.342 to 0.505 and log values of 6.02 to 6.42(μg·kg·OC)/(μg·L) for Phen. At a given , the BC had higher value than the original sediments, revealing a higher sorption capacity for BC. BC was responsible for 50.0% to 87.3% of the total sorption at =0.05 , clearly indicating the dominance of BC particles in overall sorption of Phen by sediments.

Keywords

phenanthrene ; sorption ; black carbon ; sediment ; Song-Liao watershed

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