Department of Biological and Environmental Sciences, Doha, Qatar University, Qatar.
Environmental Studies Center, Qatar University, Doha, Qatar.
Sci Total Environ. 2019 Mar 25;658:787-797. doi: 10.1016/j.scitotenv.2018.12.093. Epub 2018 Dec 8.
The quantitative analysis of 18 parents and their alkyl homologs was performed in sediment samples from the central Arabian Gulf (Gulf) around Qatar Peninsula in six sequential seasons, winter 2014 to spring 2015, at 21 locations with a water depth range of 1.5-60 m. PAHs distribution was patchy with higher concentrations found inside semi-enclosed coastal areas like harbors and bays. The mean PAHs concentration was 112 ng·g dry weight with a range of 0.6 to 1560 ng·g and a variability coefficient of 2.4. The PAHs mean concentration was highest in the winter by a factor of 5 compared to mean summer concentration. A significant seasonal variability in the concentrations of ∑PAHs is mainly attributed to variability in the concentrations of the low molecular weight PAHs fraction and the less alkylated PAHs. Alkylated-PAHs were the most dominant PAHs comprising about 50% of the ∑PAHs, and with about 6 times higher than the mean concentrations in the winter compared to the mean summer concentration. The LPAHs concentrations correlated negatively with temperature and ∑PAHs correlated positively with % clay. Principal component analysis was used to identify sources of PAHs. PAHs in the Gulf have mixed sources with an estimated 57% from petroleum and 43% from pyrogenic sources. Coastal water hydrodynamics and lateral transport processes affect the distribution and composition of PAHs in the central Gulf.
对卡塔尔半岛附近阿拉伯湾中部（海湾）的沉积物样本进行了 18 位家长及其烷基同系物的定量分析，在六个连续季节（2014 年冬季至 2015 年春季），在 21 个水深范围为 1.5-60 m 的地点进行了分析。PAHs 分布不均匀，在港口和海湾等半封闭沿海地区的浓度较高。PAHs 的平均浓度为 112ng·g 干重，范围为 0.6 至 1560ng·g，变异系数为 2.4。与夏季平均浓度相比，冬季 PAHs 的平均浓度高 5 倍。∑PAHs 浓度的显著季节性变化主要归因于低分子量 PAHs 部分和较少烷基化 PAHs 浓度的变化。烷基化-PAHs 是最主要的 PAHs，占∑PAHs 的约 50%，与冬季的平均浓度相比，夏季的平均浓度高约 6 倍。LPAHs 浓度与温度呈负相关，∑PAHs 与粘土百分比呈正相关。主成分分析用于识别 PAHs 的来源。海湾中的 PAHs 具有混合来源，估计有 57%来自石油，43%来自热解源。沿海水动力和侧向输运过程影响海湾中部 PAHs 的分布和组成。
