Lead oxide is a poisonous one how can we used in water treatment.is there any method used for water purification.
It is rather lead dioxide PbO2 that is used in water treatment, more precisely in electrochemical methods. Electrochemical methods are a promising alternative for the treatment of wastewaters containing organic pollutants. The main advantages of these processes include environmental compatibility, versatility, energy efficiency, safety, selectivity, amenability to automation and cost-effectiveness. Particular attention has been placed on the anodic oxidation, based on the electro generation of hydroxyl radicals directly at the anode surface from water discharge. It has been generally observed that the nature of the electrode material strongly influences the efficiency of the anodic oxidation process. While for classical anode materials (eg: Pt, C or IrO 2) the oxygen transfer reactions are slow and characterized by low faradic yields and current loss due to O 2 evolution, the use of anodes with high oxygen overpotential, like lead dioxide (PbO 2) gold boron-doped diamond (BDD), favours the degradation and enhances the current efficiency. PbO 2 has been extensively used to decompose organic contaminants owing to its high electrical conductivity, high oxygen overpotential and chemical inertness and low cost compared with other anodic materials. The use of high-performance anodic materials like PbO 2 electrodes can achieve high efficiency and lower the operating cost.
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