Polyaromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in groundwater and leachate around selected waste dumpsites from two southwestern states of Nigeria were investigated. Samples were Soxhlet-extracted using hexane/methylene chloride mixture and cleaned-up with preconditioned solid-phase extraction cartridges. The ∑PAHs (PCBs) (all in µg/L) in the boreholes, leachate, and hand-dug well across all locations ranged from below detection limit (BDL) to 0.62 (BDL to 0.067), 1.16 to 9.96 (0.003 to 0.041), and BDL to 0.01 (0.001–0.031), respectively. Low molecular weight-PAHs accounted for ≥61% of ∑PAHs detected across all locations. The highly chlorinated hexa-PCBs [2,2′,3,4,4′,5′-HeCB(#180), 2,2′,3,4′,5′,6-HeCB(#34) and 2,2′,4,4′,5,5′-HeCB(#153)] dominated the entire congener profiles. Pyrene and 2,3′,4,4′,5-PeCB(#118) constituted 56% and 58% of the ∑PAHs and ∑PCBs, respectively. Sampled water is not adequately safe for drinking and may pose cancer risk. This study should be sustained for health risk and sustenance of an enduring ecological integrity.

调查了来自尼日利亚西南两个州的部分垃圾场附近的地下水和渗滤液中的多环芳烃（PAHs）和多氯联苯（PCBs）。使用己烷/二氯甲烷混合物对样品进行索格利特萃取，并使用预处理的固相萃取柱进行净化。钻孔，浸出液和手挖井中所有位置的∑PAH（PCB）（均以µg / L计）范围从低于检测极限（BDL）到0.62（BDL到0.067），从1.16到9.96（0.003到0.041） ）和BDL分别为0.01（0.001-0.031）。低分子量PAH占所有位置检测到的∑PAH的≥61％。高度氯化的六氯联苯[2,2'，3,4,4'，5'-HeCB（＃180），2,2'，3,4'，5'，6-HeCB（＃34）和2 ，2'，4,4'，5,5'-HeCB（＃153）]主导了整个同类物分布。P和2,3'，4,4'，5-PeCB（＃118）分别占∑PAH和∑PCB的56％和58％。取样的水不能安全饮用，并且可能引起癌症。为了健康风险和维持持久的生态完整性，应该坚持这项研究。