Université Paul Cézanne Aix-Marseille 3, ISM2, UMR 6263, équipe AD2M, Europôle de l'Arbois-Bâtiment Villemin, BP80-13545 Aix-en-Provence Cedex 4, France.
Environ Sci Pollut Res Int. 2012 Feb;19(2):559-76. doi: 10.1007/s11356-011-0582-5. Epub 2011 Aug 20.
The Arc River and Berre lagoon are one of important river basin hydrosystem in the South of France that receives industrial and municipal wastewaters from the adjacent area.
Due to its social and economic impact as well as ecological function of basin, an assessment of environmental risk due to mobilization of contaminants is necessary. Thus, the study aims to determine the spatial distribution of n-alkanes, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), organochlorine and organophosphorous pesticides in surface sediments and their potential origins by using gas chromatography coupled to mass spectrometry.
Total alkanes concentrations ranged from 563 to 5,068 μg kg(-1) sediment dry weight (dw), the sum of 17 PAHs ranged from 153 to 1,311 μg kg(-1) dw, the sum of seven PCBs concentrations ranged from 0.3 to 466.8 μg kg(-1) dw, and the total pesticides concentrations ranged from 0.02 to 7.15 μg kg(-1) dw. Ratios of specific n-alcanes (carbon preference index, natural n-alkanes ratio, and terrigenous/aquatic ratio) and ratios of selected PAH (anthracene (Ant)/(Ant + Phe), fluoranthene (Fl)/(Fl + pyrène (Pyr)), BaA/(BaA + chrysene (Chry)), indeno[1,2,3,c,d]pyrene (IPyr)/(IPyr + BghiP)) were calculated to evaluate the possible sources of hydrocarbons.
The evaluations suggest the sources of hydrocarbons in the sediments were generally biogenic and markedly more pyrolytic rather than petrogenic. In the perspectives of environmental risk assessment, all contaminants levels were also compared with sediments quality guidelines (SQG) resulting that the contamination levels in all stations were most of the time lower than their respective SQG. While, for PCBs concentrations, three stations (A8, B1, and B2) were higher than their effect range median values which may indicate high potential toxicity of the sediment with probable adverse effects to the living biota.
阿尔克河和贝雷泻湖是法国南部重要的河流流域水系统之一，接收来自邻近地区的工业和城市废水。
由于其社会经济影响以及流域的生态功能，有必要评估污染物迁移引起的环境风险。因此，本研究旨在通过气相色谱-质谱联用技术测定表层沉积物中 n-烷烃、多环芳烃（PAHs）、多氯联苯（PCBs）、有机氯和有机磷农药的空间分布及其潜在来源。
总烷烃浓度范围为 563 至 5068μgkg(-1) 沉积物干重（dw），17 种 PAHs 的总和范围为 153 至 1311μgkg(-1) dw，7 种 PCB 浓度总和范围为 0.3 至 466.8μgkg(-1) dw，总农药浓度范围为 0.02 至 7.15μgkg(-1) dw。特定 n-烷烃的比值（碳偏好指数、天然 n-烷烃比值和陆源/水比值）和选定 PAH 的比值（蒽（Ant）/（Ant+菲（Phe））、荧蒽（Fl）/（Fl+芘（Pyr））、苯并[a]蒽（BaA）/（BaA+屈（Chry））、茚并[1,2,3,c,d]芘（IPyr）/（IPyr+BghiP））用于评估烃类的可能来源。
评估结果表明，沉积物中烃类的来源通常是生物源的，明显更多的是热解而不是生源。从环境风险评估的角度来看，所有污染物水平也与沉积物质量指南（SQG）进行了比较，结果表明，所有站位的污染水平大多低于各自的 SQG。然而，对于 PCBs 浓度，三个站位（A8、B1 和 B2）高于其效应范围中值，这可能表明沉积物具有高潜在毒性，可能对生物群产生不利影响。
