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.

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.

How is PAFC prepared?

PAFC is prepared by microwave synthesis with a shortened time of 5 min and the conditions of preparation are optimized. Its performance is better than that of the commonly used polymeric aluminum chloride (PAC) and polymeric iron chloride (PAF).

What does PAFC stand for?

Synthesis, purification and characterization of polyaluminum ferric chloride (PAFC) with high (Al + Fe) b content Sep. Purif. Technol., 146 ( 2015), pp. 311 – 316

Are PAFC flocs kept by chemical bonding?

In this study, the Rf values of all the PAFC flocs were less than 40%, indicating weak floc regrowth capacity, which was considered to be the evidence that the flocs were kept by chemical bonding rather than physical force and bridging and sweep mechanisms were involved besides charge neutralization.

How is PAFC synthesized?

PAFC was synthesized following two steps: First, 50 g of blast furnace dust was placed in a 500 mL three-necked round bottom flask equipped with stirrer and reflux device. Then, 2 g NaF, 150 mL of HCl diluted solution (36%, freshly diluted 1:1 with ultrapure water) and 5 mL of HNO 3 were added.