title: [Sorption and desorption behaviors of phenanthrene on sediments from the rivers and estuaries flowing into sea around Bohai Bay].
abstract: Batch experiments were employed to investigate the sorption and desorption procedures of phenanthrene (Phe) on the river and estuarine sediments. The relationships between sorption parameters and organic matter properties were also discussed. The results indicated that the data on Phe sorption and desorption by different river and estuarine sediments could be fitted well by the linear partitioning and Freundlich model. The linear distribution coefficients (KD) (v) aried from 58 to 743 L x kg(-1). The Freundlich parameters (K(F) and K(FOC)) varied from 75 microg(1-N) x kg(-1) x L(N) to 367 micro(1-N) x kg(-1) x L(N) and from 2253 microg(1-N) x kg(-1) x L(N) to 34743 microg(1-N) x kg(-1) x L(N), respectively. There were significantly positive correlations between K(D) and TOC, TN, DOC, Phe, C/N, DOC/TOC. However, a negative correlation occurred between K(F), K(FOC) values and DOC/TOC ratios. The data on Phe desorption could be better fitted by the Freundlich model than that by linear partitioning model. Except for S1, S8 and S9 samples, the others exhibited obvious sorption and desorption hysteresis. Contents and properties of organic matter were significant as the major factors controlling Phe sorption and desorption to and from the sediments. Considering the frequent impacts of anthropogenic sources on the river and estuarine sediments, the effects of dissolved organic matter on Phe sorption and desorption were perceived to be more important.
authors.affiliation: College of Water Science, Beijing Normal University, Beijing 100875, China. jiaolixin1224@yahoo.com.cn
authors.forename: Li-Xin
authors.initials: LX
authors.lastname: Jiao
authors.forename: Wei
authors.initials: W
authors.lastname: Meng
authors.forename: Bing-Hui
authors.initials: BH
authors.lastname: Zheng
authors.forename: Xing-Ru
authors.initials: XR
authors.lastname: Zhao
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Yan-Wen
authors.initials: YW
authors.lastname: Qin
mesh_terms: D000327:Adsorption; D002681:China; D019015:Geologic Sediments / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008962:Models, Theoretical; D009792:Oceans and Seas; D009930:Organic Chemicals / Q000737:chemistry*; D010316:Particle Size; D010616:Phenanthrenes / Q000737:chemistry / Q000302:isolation & purification*; D045483:Rivers / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D009930:Organic Chemicals; D010616:Phenanthrenes; D014874:Water Pollutants, Chemical; C031181:phenanthrene