Is polyaluminum ferric chloride an inorganic coagulant?

1. Introduction Polyaluminum ferric chloride (PAFC) is an efficient inorganic polymeric coagulant [1], [2]. Many studies [3], [4], [5] have demonstrated that inorganic polymeric coagulants were more effective than conventional inorganic coagulating salts in coagulation due to their resistances to the influence of wastewater initial pH.

What is poly aluminum-ferric chloride (PAFC)?

Author to whom correspondence should be addressed. Poly aluminum-ferric Chloride (PAFC) is a new type of high efficiency coagulant. In this study, high iron type gangue is used as a main raw material. It is calcined at 675 °C for 1 h and 3% CaF 2 is added to the calcined powder and reacted with 20% hydrochloric acid at 93 °C for 4 h.

Which pre-hydrolysed coagulants are most effective?

Some novel pre-hydrolysed coagulants such as polyaluminium chloride, polyaluminium ferric chloride, polyferrous sulfate, poly-ferric chloride (PFC) and natural coagulants have been found to be more effective than traditional metal coagulants for toxic organics removal .

What are the coagulation mechanisms besides charge neutralization?

And there were other coagulation mechanisms besides charge neutralization such as bridge connection and sweep flocculation, playing significant roles in decolorization process. Evaluation of polyaluminium ferric chloride (PAFC) as a composite coagulant for water and wastewater treatment

Which coagulants are used in wastewater treatment plants?

As the most common coagulants, ferric chloride (FC) and PFC have been widely used in wastewater treatment plants for many years [16, 17]. As a novel macromolecular polymer with amidine units on its molecular chains, polyamidine (PA) has attracted more attention in coagulation process.

Do surface characteristics of PAFC and flocs affect coagulation mechanisms?

However, there was lack of systematic research on the surface characteristics of PAFC and the flocs generated in water treating process and their effect on the coagulation mechanisms.