Determination of heavy metal (Cadmium, manganese and aluminium) concentration in Likas river / Muhammad Faizan Masnan

Water quality status in rivers can be determined by various factors such as physical factors, chemical factors and heavy metals pollution. In this study, three types of heavy metals namely Cadmium (Cd), Manganese (Mn) and Aluminium (Al) were determined in seven selected sampling station along the Likas River. The selections of stations were based on their land used such as industrial development including houses, factories and also villages. The water sampling was done in 3 consecutive months of April, May and June 2013. Water samples collected using polietilena bottle, then preserved using 70% Nitric Acid and analysis using AAS machine model PG990. Sampling station 7 located to lower stream recorded the highest reading of Cadmium (0.931 ppm), Manganese (0.506 ppm) and Aluminium (11.803 ppm) between other stations. Concentrations of these three heavy metals were different in each sampling stations and also vary in different months. Heavy metals of Cadmium, Manganese and Aluminium were determined according to land used that present at each sampling stations for 3 consecutive months. Few types of other heavy metals can be determine in future research and proper equipment can also be used to get better data.