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  • 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 [6 ].
  • Which coagulants are used in water purification?
  • Among them, polyaluminium chloride is the most widely used in water purification due to its fast flocculation speed and large floc size [ 1, 2, 3, 4, 5, 6, 7 ]. In water treatment plants, in order to improve the efficiency of coagulation process, the use of prehydrolysed coagulants in place of aluminium sulphate (VI) is a common practice.
  • What is high-purity poly-aluminum chloride (PACL)?
  • Poly-aluminum chloride (PACl) is one of the common coagulants for water and wastewater treatment. A new Chinese national standard of PACl has been implemented, where the concentration of insoluble substances, iron and heavy metals is to be controlled strictly, then researches on the preparation of high-purity PACl are needed.
  • 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 [6 ].