摘要：

这项研究是为了评估阿南布拉州Okpoko和周边地区的土壤和地下水质量。收集了15个土壤和地下水样品，分析了理化、重金属和碳氢化合物含量。取样深度分别为15cm和30cm。采用原子吸收光谱仪对土壤和地下水中的重金属进行了分析。基于SAR(<13)、pH(<8.5)和EC(>4µS/cm)的土壤分级方案表明，该地区表土(0 ~ 15cm)和底土(15 ~ 30cm)以砂为主(>占70%)，属于盐渍土。除了Ni，其他所有金属的浓度都随着深度的增加而降低。表层和底土的总石油烃含量分别为109.43 ~ 2112.64 mg/kg和105.57 ~ 1747.82 mg/kg。表层和底土TPH平均值分别为654.01±582.12和568.27±502.11 mg/kg，对照场地TPH平均值分别为54.43和16.63 mg/kg。燃料加注服务站附近的TOC含量高于控制点，这是人为影响的表现。TPH含量一般随深度的增加而降低，并且在控制区比在加油服务站附近低。除铁、锰外，其他金属含量均超过控制值。 The metal concentrations were within DPR regulatory limits for safe agricultural soils. Assessment of anthropogenic influences on the soil quality in the area with the control site as baseline was accomplished using soil quality models including:Contamination Index (CI), Pollution Load Index (PLI), Modified Contamination Degree (mCD), Geo-accumulation Index (Igeo), and Nemerov Integrated Pollution Index (NIPI) which shows that the soils are heavily polluted from the activities at the fuel filling and service stations in the area. Regular soil and groundwater assessment is recommended to monitor the contamination potential in the area.