Why is polyaluminum chloride a good coagulant for water treatment?

Polyaluminum chloride (PAC) is highly effective coagulant for water treatment over conventional coagulants because of low dosage requirement, shorter flocculation time, smaller amount of sludge, high efficiency and low aluminum residual in treated water .

Is there an alternative preparation procedure for polyaluminium chloride (PAC)?

An alternative preparation procedure for polyaluminium chloride (PAC), a common inorganic coagulant, is presented in this paper.

Which chemicals can be used as coagulants for water treatment?

There are a large number of chemicals that can be used as coagulants for water treatment, which include inorganic based coagulants, organic based coagulants and hybrid materials coagulants. Aluminum sulfate, ferric chloride, ferric sulfate and polyaluminum chloride are inorganic based chemicals which can be used for water treatment .

Can granular al be used to produce polyaluminium chloride?

An alternative way for the production of PAC should be desirable, resulting in a more effectively preparation route, regarding time and cost. In this paper, an alternative method for producing polyaluminium chloride is presented, based on the use of granular Al, as aluminium source.

What is the coagulation time for aluminum sulfate and aluminum chloride coagulants?

However, for aluminum sulfate and aluminum chloride coagulants the coagulation time and settling time were reached to 15 and 35 min, respectively. The results revealed that the residual aluminum concentration in the treated water was very small for synthesized PAC coagulant which was <0.2 mg L −1.

What is polyaluminium chloride used for?

Among the aforementioned products, polyaluminium chloride has become one of the most effective coagulant agents in water and wastewater treatment facilities with various applications, including removal of colloids and suspended particles, organic matter, metal ions, phosphates, toxic metals and color.