摘要：Surface soil samples were collected from six (6) urban waste dumpsites within Akwa Ibom State, Niger Delta region of Nigeria during the dry and wet of the study area and examined their lead (Pb), cadmium (Cd) and arsenic (As) contents. Soil pH and organic matter (OM) contents were also analyzed for in these samples. Using Pearson Correlation, the roles of total metal content, pH and OM on the mobility of these metals in soils studied were investigated. Results obtained revealed Cd as the element with the highest mobility potential while As was the least mobile element in the area. It was also deduced from the study that, total lead in soil correlated negatively with its mobility in soil, the effect of total Cd in soil varied with season while total arsenic showed significant positive relationship with its mobility in soil irrespective of the season. Mobility of lead was strongly hindered by soil pH and OM notwithstanding the change in season experienced. However, soil pH and OM strongly promoted the mobility of cadmium and arsenic in the area during dry season but during the wet season these properties acted as impediments to their mobility in soil. This study has shown that the mobility and accessibility of these toxic elements could be controlled by the regulating soil pH and OM contents
