Heavy metal pollution is a serious environmental issue, particularly in developing countries like Nigeria. This research work focused on investigating the levels of heavy metals concentration in polyalthia longifolia. The metals analyzed include the following, Chromium (Cr), Lead (Pb), Calcium (Ca), Sodium (Na), Copper (Cu), Iron (Fe), Nickel (Ni), Aluminium (Al), Mercury (Hg) and Zinc (Zn) in the bark of polyalthia longifolia, the fresh bark samples were collected from Akwaka, Rivers-state. Atomic Absorption Spectrophotometry was used to analyze the fresh bark samples for heavy metals. The results obtained for fresh bark were; Chromium (0.03mg/100g), Lead (0.05mg/100g), Sodium (3.80mg/100g), Arsenic (0.01mg/100g), Copper (0.23mg/100g), Iron (5.21mg/100g) Nickel (0.01mg/100), Aluminium (0.30mg/100g), Mercury (ND), Zinc (2.97mg/100g) and Calcium (3.80mg/100g). from the results obtained it has shown that mercury is not detected, the values of iron, sodium, and zinc are considerably significant and which contributes to the nutritional and medicinal importance of the plant in building of the cells as coenzymes and effective metabolic rate in the body system, the values of arsenic, lead and mercury show that the plants is less toxic and may not be harmful to the human system. The consumption of this plant can contribute good fibre, high energy content and will effectively reduce dangerous health risks, the results are generally within the permissible limit of World Health Organization. . For separation and identification of various components of the Polyathia Longifolia sample extract, thin-layer chromatography (TLC) was performed using 95% ethyl acetate and 5% ethanol as eluents. This gave three separation spots with Rf factors of 0.1, 0.025 and 0.075 respectively. Extraction of the Polyalthia Longifolia plant bark was carried out by steeping washed, air-dried and ground sample in n-hexane for 48 hours, which was then filtered and evaporated to dryness to obtain a thick black viscous liquid The plant is rich in minerals and is properly cultiivated in Nigeria. Continuous research on other areas of polyalthia longifolia, should be carried out regularly in the area.

This study investigates the hydrochemical characteristics and pollution sources affecting the water quality of the Nworie and Otamiri Rivers in Owerri Metropolis, Nigeria. These rivers are essential for domestic, industrial, and agricultural uses, but are threatened by both point and non-point source pollution. The study utilized Durov diagrams to analyze water samples, revealing that ion exchange reactions are the primary hydrochemical processes influencing water quality. The samples were predominantly classified as intermediate-type water with chloride-type anions, though variations such as magnesium-rich and sodium plus potassium types were noted. The pH and Total Dissolved Solids (TDS) values exhibited systematic trends, suggesting natural geochemical processes and anthropogenic influences. Increasing activities along the watersheds, including runoff from rainfall carrying pollutants, have transformed previously point-source pollution into more complex non-point source pollution, complicating monitoring and control efforts. As observed in the post-confluence samples, the classification of water samples into different cation and anion types indicates diverse sources and interactions, including potential mixing with seawater in certain areas. The findings underscore the need for comprehensive water quality management strategies to address these rivers' diverse and dynamic contamination sources. Further research, including isotopic analysis and detailed chemical characterization, is recommended to better understand the region's environmental and human factors influencing water quality.