Simultaneous Quantitation of Manganese (II) and Iron (III) In An Industrial Effluent Using Differential Pulse Polarography

Abstract

In the present study, a successful attempt has been made to develop a simple method for the simultaneous determination of manganese (II) and iron (III) in an industrial effluent using differential pulse polarography (DPP) technique. Quantification of manganese (II) and iron (III) was done in Triethanolamine and KOH as a supporting electrolyte. The polarogram recorded for the industrial effluent in triethanolamine and KOH showed two peaks at -0.3V and ­0.82V vs. saturated calomel electrode which were confirmed to be of manganese (II) and iron (III) respectively by the method of standard addition. The linear working range for manganese (II) and iron (III) both was 1.408 µg/mL to 4.977 µg/mL. The proposed method was found to be simple, precise, and accurate and can be successfully applied for the analysis and simultaneous determination of manganese (II) and iron (III) in industrial effluents. Keywords: Differential pulse polarography, Industrial effluent, Iron (III), Manganese (II), Potassium hydroxide, Triethanolamine, I. Introduction Rapid industrialization and abnormal population growth has enhanced water pollution. Monitoring the metal ions and organic compounds in aquatic environment has been a subject of great concern over the last few decades and will continue to be so, as increasing number of metal ions in increasing amounts and a diverse array of organic compounds form a part of an industrial effluent. The heavy metals like Lead, Cadmium, Mercury, Arsenic, Iron, Nickel, Copper and others are used widely in industries. Thus, monitoring of these toxic substances is an integral part of environmental management. Some of these elements may be micronutrients for many living organisms and are required in small amounts for normal healthy growth, but any metal ion in large amount will always cause acute or chronic toxicity. Manganese is an essential trace mineral. The mineral is considered to be essential for the formation of healthy red blood cells, proper pituitary gland function, and the maintenance of good eyesight. Manganese is not only necessary for humans to survive, but it is also toxic when too high concentrations are present in a human body. Iron is a dietary requirement for most organisms. In small quantities, certain metals are nutritionally essential for a healthy life. These elements are also found in commercially available multivitamin products. Water soluble binary iron compounds such as FeSO4, FeCl2 may cause toxic effects with exceeding concentrations. The present paper deals with simultaneous quantitation of such electroactive species which are commonly associated with effluents from pharmaceutical industries. Potentiometric stripping analysis of simultaneous determination of metal ions has been reported