Abstract
Treated and untreated wastewater samples from Wupa Sewage Treatment Plant Idu Research and Industrial Layout Abuja were analyzed to determine the concentrations of Cd, Fe, Cu, Pb, Zn and anions like sulphate, chloride, nitrate and phosphate. Heavy metal analyses were performed by atomic absorption spectrophotometry. Mean heavy metal contents i.e. Zn, Cu, Fe, Cd and Pb in water samples reduced from 0.13 to 0.05 mg/l, 0.05 to 0.02 mg/l, 0.82 to 0.22 mg/l, 0.001 to 0.0002 mg/l, and 0.001 to 0 mg/l respectively before and after treatment. There was decrease in phosphate, chloride and sulphate concentration after treatment with increase in nitrate and nitrate concentration after treatment, suggesting the plant might be inefficient in nitrate and nitrate treatment.
Highlights
Safe discharge of untreated wastewater and scarcity of water is still a burning problem in front of mankind
Nitrate concentrations obtained in this work for the untreated wastewater samples ranged from 1.90–4.00 mg/l with a mean value of 2.87±0.75 mg/l with the measured value for treated sample increasing to 8.27±1.22 mg/l
The nitrate and nitrite results for both untreated and treated wastewater in this study are within the permissible standard limits i.e. 50 mg/l and 1 mg/l [12; 13]
Summary
Safe discharge of untreated wastewater and scarcity of water is still a burning problem in front of mankind. Studies of water quality in various effluents [1] revealed that anthropogenic activities have an important negative impact on water quality in the downstream sections of the major rivers. This is a result of cumulative effects from upstream development and from inadequate wastewater treatment facilities [2]. This study is based on weekly measurements of chemical parameters of untreated and treated water samples from Wupa Sewage Treatment Plant Idu Research and Industrial Layout Abuja over a period of six weeks
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