Clean and pure water is essential to human health. Therefore, removal of contaminants from wastewater is important to ensure that we consume only clean water. Flocculation is a process in water treatment operation which is useful in separating out sediment, removing harmful substances, and to treat colloids in water. The degree of flocculation can be increased by adding flocculating agents, also known as flocculants. [1]
Aluminum sulfate, commonly known as alum, is a type of flocculating agent which has been known for centuries and is widely used in water treatment applications. [2] However, there are possible health risks due to presence of aluminum in water despite of its effectiveness and other benefits. As alum may be health threatening, should it continue be used?
Alum is effective in treating wastewater as it settles out a wide variety of unwanted materials. This is due to the highly charged aluminum ion produced when alum dissolves in water. [3] Iron compound......
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