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

查看全文 作　　者：Jinghuan [1]ZHANG;Mengchang [1]HE;Chunye [1]LIN;Ke [1]SUN;Bin [1]MEN;John [1]L.ZHOU 机构地区：[1]State Key Laboratory of Water Environment Simulation,School of Environment,Beijing Normal University,Beijing 100875,China 出　　处：《Frontiers of Environmental Science & Engineering》索引2009年第3卷第4期,共9页 基　　金：the National Basic Research Program of China(Grant No.2004CB418502);the National Natural Science Foundation of China(Grant No.20477003). 摘　　要：Black carbon(BC)in ten contaminated sediments from the Song-Liao watershed,NE China,was isolated upon treatments using a combustion method at 375℃,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 logKFOC values of 6.02 to 6.42(μg·kg^(–1)·OC^(–1))/(μg·L^(–1))n for Phen.At a given Ce,the BC had higher Koc 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 Ce=0.05 Sw,clearly indicating the dominance of BC particles in overall sorption of Phen by sediments. 关 键 词：PHENANTHRENE SORPTION black carbon sediment Song-Liao watershed