Polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in sediment cores of the microtidal coastline of Lagos lagoon were investigated for the occurrence, sources and depositional contamination history. Sediment core samples were collected using the Wildco @ hand corer (50 cm) SS kit and extracted using a 40 mL mixture of hexane and acetone (1:1), and cleaned-up using 10 mm ID chromatographic column before the concentration of aliquots. In this investigation, 16 US EPA priority PAHs and PCB congeners were analysed in aliquots of sediment cores using Agilent 7820A gas chromatograph coupled to a 5975C inert mass spectrometer (with triple-axis detector) with an electron-impact source. PAHs and PCBs were detected at varying concentrations across the 50 cm depth of each sediment core. The total PAH concentrations ranged from 1.43–5.90 mg/kg, and were more widely distributed than the total PCBs. The total PCB concentrations ranged from BDL – 6.41 mg/kg. The PAH diagnostic ratios used identified the sources of the PAHs as pyrogenic rather than petrogenic. About 52% of the samples had concentrations above the ERM limit for total PCBs, suggesting that adverse effects on biota may occur in the long term. In general, the PAHs and PCBs concentrations detected in sediment cores of the Lagos lagoonal system may pose a considerable ecotoxicological risk to estuarine organisms.

研究了拉各斯泻湖微潮海岸线沉积物核心中的多环芳烃（PAHs）和多氯联苯（PCBs）的发生，来源和沉积污染历史。使用Wildco @ hand corer（50 cm）SS试剂盒收集沉积物核心样品，并使用40 mL己烷和丙酮的混合物（1：1）萃取，并在浓缩等分试样之前使用10 mm ID色谱柱进行净化。在这项研究中，使用安捷伦7820A气相色谱仪和带有电子碰撞源的5975C惰性质谱仪（带三轴检测器）联用的安捷伦7820A气相色谱仪，对沉积岩心等分试样中的16种美国EPA优先PAH和PCB同类物进行了分析。在每个沉积物芯的50厘米深度处以不同的浓度检测到PAHs和PCB。PAH的总浓度范围为1。43–5.90 mg / kg，并且比多氯联苯的总量分布更广泛。多氯联苯的总浓度范围为BDL – 6.41 mg / kg。使用的PAH诊断率将PAHs的来源确定为热源而不是岩石源。大约52％的样品浓度超过了全部PCB的ERM限值，这表明长期可能会对生物群产生不利影响。通常，在拉各斯泻湖系统沉积物核心中检测到的PAHs和PCBs浓度可能对河口生物造成相当大的生态毒理风险。这表明长期可能对生物群产生不利影响。通常，在拉各斯泻湖系统沉积物核心中检测到的PAHs和PCBs浓度可能对河口生物造成相当大的生态毒理风险。这表明长期可能对生物群产生不利影响。通常，在拉各斯泻湖系统沉积物核心中检测到的PAHs和PCBs浓度可能对河口生物造成相当大的生态毒理风险。