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The inhibitory effects of four inhibitors on the solution adsorption of CaCO 3 on Fe 3 O 4 and Fe 2 O 3 surfaces

The inhibitory effects of four inhibitors on the solution adsorption of CaCO 3 on Fe 3 O 4 and Fe 2 O 3 surfaces

Changjun Li, Chaoyi Zhang, Wuping Zhang

Sci Rep. 2019 Sep 23;9(1):13724.

PMID: 31548558

Abstract:

This study presents the inhibitory effects of four scale inhibitors, including polyacrylic acid (PAA), hydrolyzed polymaleic anhydride (HPMA), polyepoxysuccinic acid (PESA) and polyaspartic acid (PASP), on the adsorption of CaCO3 on the surfaces of Fe3O4 and Fe2O3. Samples were characterized using SEM and EDS and the average atomic number ratios of Ca/Fe were calculated. Inhibition effects followed the trend: PESA > PAA > PASP > HPMA and PESA > PASP > HPMA > PAA for Fe3O4 and Fe2O3, respectively. Molecular dynamics simulations based on the adsorption model of the scale inhibitor on the surface and calculations of the adsorption energy between the scale inhibitor molecule and the surface revealed that the relatively high scale inhibitory effect is due to low adsorption energy between the inhibitor molecule and the surface. Density Functional Theory (DFT) calculations of the model after adsorption revealed that the relatively low adsorption energy depends on the number of H-O bonds formed as well as those with higher Mulliken population values between the scale inhibitor and the surface.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP51274374	Polyepoxysuccinic acid		51274-37-4	Price

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