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Phenanthrene sorption to environmental black carbon in sediments from the Song-Liao watershed (China)
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 (n values) and BC/total organic carbon (TOC) content of the original sediments (r 2 = 0.687, p<0.01), indicating the dominance of BC in Phen sorption nonlinearity. The BC isolates from this industrialized region had n values of 0.342 to 0.505 and logK FOC values of 6.02 to 6.42 (µg·kg−1·OC−1)/(µg·L−1) n for Phen. At a given C e, the BC had higher K oc 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 C e= 0.05 S w, clearly indicating the dominance of BC particles in overall sorption of Phen by sediments.
Phenanthrene sorption to environmental black carbon in sediments from the Song-Liao watershed (China)
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 (n values) and BC/total organic carbon (TOC) content of the original sediments (r 2 = 0.687, p<0.01), indicating the dominance of BC in Phen sorption nonlinearity. The BC isolates from this industrialized region had n values of 0.342 to 0.505 and logK FOC values of 6.02 to 6.42 (µg·kg−1·OC−1)/(µg·L−1) n for Phen. At a given C e, the BC had higher K oc 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 C e= 0.05 S w, clearly indicating the dominance of BC particles in overall sorption of Phen by sediments.
Phenanthrene sorption to environmental black carbon in sediments from the Song-Liao watershed (China)
Zhang, Jinghuan (author) / He, Mengchang (author) / Lin, Chunye (author) / Sun, Ke (author) / Men, Bin (author) / Zhou, John L. (author)
2009-12-01
9 pages
Article (Journal)
Electronic Resource
English
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