What is the difference between Pac and PAFC?

The Infrared spectrum of PAFC, extracted (Al + Fe) b species and commercial PAC showed higher content of aluminum and iron polymer linked by hydroxyl bridge in the extracted (Al + Fe) b samples compared to PAC and PAFC. The micro-morphology of the extracted (Al + Fe) b species has a three-dimensional network structure with rough branching surfaces.

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.

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).

How do you measure PAFC and purified (Al + Fe) B?

PAFC and purified (Al + Fe) b were dried at 105 °C for 8 h and measured by a Fourier transform infrared spectrometer (Nicolet Avatar 370, US) with KBr pellets. The measurement was at conditions of 4 cm −1 resolution, scanning frequency 608°min −1 and scanning range 400–4000 cm −1.

What is a (Al + Fe) species in PAFC?

The (Al + Fe) species in PAFC was divided into (Al + Fe) a, (Al + Fe) b and (Al + Fe) c by the Ferron timed complex-colorimetric method , where the (Al + Fe) b species was defined as the medium polymeric species of (Al + Fe) in PAFC (showing a reaction time with Ferron from 1 to 240 min).