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Phosphate and nitrogen removal often requires the use of specific chemicals. For phosphorus removal, chemical precipitation using ferric chloride or aluminum sulfate is common. These chemicals bind with phosphorus to form insoluble compounds that can then be removed during sedimentation. For nitrogen removal, the process may involve adding sodium nitrate or ammonium sulfate to facilitate biological denitrification, where microorganisms convert nitrates into harmless nitrogen gas.
Concrete is one of the most widely utilized construction materials in the world, owing to its strength, durability, and versatility. Traditionally, the development of concrete has relied on various chemical additives to enhance its performance characteristics. Among these additives, sodium thiocyanate (NaSCN) has emerged as a significant player due to its unique properties and effects on concrete's physical and chemical behavior.