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.

What is the turbidity removal ratio of PAFC?

The prepared PAFC is used to treat mine water and compared with the results of PAC and PAF, the turbidity removal ratio of PAFC is 99.6%, which is greater than 96.4% of PAC and 93.7% of PAF. PAFC is a mixture with different degrees of polymerization.

Is polyaluminium ferric chloride a composite coagulant?

Gao, B.; Yue, Q.; Miao, J. Evaluation of polyaluminium ferric chloride (PAFC) as a composite coagulant for water and wastewater treatment. Water Sci. Technol. 2003, 47, 127. [ Google Scholar] [ CrossRef] [ PubMed]

How to extract (Al + Fe) B species from PAFC?

The mixture solution of ethanol, propylene glycol, and acetone could be used as precipitation solvents to extract the (Al + Fe) b species from PAFC. The optimal separation and purification conditions were organic solvents volume ratio = 2:1:7 and the middle organic solvents dosage V2 = 100 mL ( V1 = V3 = 50 mL, for 10 mL of 0.3 M PAFC solution).

What is PAFC from coal gangue?

The XRD and FT-IR spectra showed that the prepared product is a mixture of PAFC with different degrees of polymerization. The preparation of PAFC from coal gangue can realize the resource utilization of gangue. It is mainly used for the treatment of coal industrial wastewater and the treated water can be recycled.

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.