Using of Alternative Green Coagulant in Treatment of Micro-Pollutants in Different Water Resources

Abstract

Drinking water treatment is a vital process to provide consumers with safe and healthy water. Conventional treatment using chlorine and alum as treatment chemicals has many quality problems as chlorine disinfection by-products and residual aluminum, so looking for an alternative for both chlorine and alum is still a main topic for the water researchers. A potential alternative is a ferrate (VI) salt (e.g. potassium ferrate), which is a very strong oxidant; under acidic conditions, the redox potential of ferrate(VI) ions is the strongest among all oxidants/disinfectants used for water and wastewater treatment. In addition, it acts as a coagulant; during the oxidation/disinfection process, ferrate(VI) ions are reduced to Fe(III) ions or ferric hydroxide, and this simultaneously generates a coagulant in a single dosing and mixing unit process. This study represents an attempt to use these properties to remove ammonia from surface water resources and to treat iron and manganese from ground water resources. Two different study area were selected: Rosetta Branch as surface water resource and Delta Region as ground water resource, Ferrate was prepared and characterized in-house and has proven itself as a green potential alternative for the conventional treatment.