Oren Adi, Aizenshtat Zeev, Chefetz Benny
Department of Soil and Water Sciences, Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel.
Environ Pollut. 2006 May;141(2):265-74. doi: 10.1016/j.envpol.2005.08.039. Epub 2005 Oct 10.
The Kishon River, the second largest coastal river in Israel, has been severely polluted for several decades. Sediments from upstream and downstream sites of the river were analyzed, lipid-extracted and evaluated for phenanthrene uptake. Total polycyclic aromatic hydrocarbon (PAH) concentration in downstream sediments was 299 microg kg(-1), consisting mostly of petrogenic-derived PAHs. Downstream sedimentary lipids were found to be dominated by fresh and decomposed petroleum-derived n-alkanes. The total PAH concentration in upstream sediments was 173 microg kg(-1), consisting mostly of pyrogenic-derived PAHs, whereas lipids from these sediments were mostly vegetation-derived. Spectroscopic data suggested an exceptionally high aromatic content in downstream humic acid, which originated from PAHs attached to its structure. Sorption data suggested that upstream sedimentary cuticle-derived lipids function as a sorption domain, while downstream sedimentary lipids, consisting of shorter-chain-length petroleum-derived alkanes, compete with phenanthrene for sorption sites.
基顺河是以色列第二大沿海河流，几十年来一直受到严重污染。对该河上下游地点的沉积物进行了分析、脂质提取，并评估了菲的吸收情况。下游沉积物中多环芳烃（PAH）的总浓度为299微克/千克，主要由石油源PAH组成。发现下游沉积脂质以新鲜和分解的石油衍生正构烷烃为主。上游沉积物中PAH的总浓度为173微克/千克，主要由热解源PAH组成，而这些沉积物中的脂质大多来自植被。光谱数据表明下游腐殖酸中的芳香含量异常高，这源于附着在其结构上的PAH。吸附数据表明，上游沉积角质层衍生的脂质起到吸附域的作用，而下游由较短链长石油衍生烷烃组成的沉积脂质与菲竞争吸附位点。
