Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2022 Jan 20;14(3):405.
doi: 10.3390/polym14030405.

Adsorption of Hydrolysed Polyacrylamide onto Calcium Carbonate

Jin Hau Lew  1 , Omar K Matar  1 , Erich A Müller  1 , Myo Thant Maung Maung  2 , Paul F Luckham  1
Affiliations

Adsorption of Hydrolysed Polyacrylamide onto Calcium Carbonate

Jin Hau Lew et al. Polymers (Basel). .

Abstract

Carbonate rock strengthening using chemical techniques is a strategy to prevent excessive fines migration during oil and gas production. We provide herein a study of the adsorption of three types of hydrolysed polyacrylamide (HPAM) of different molecular weight (F3330S, 11-13 MDa; F3530 S, 15-17 MDa; F3630S, 18-20 MDa) onto calcium carbonate (CaCO3) particles via spectrophotometry using a Shimadzu UV-2600 spectrometer. The results are compared to different adsorption isotherms and kinetic models. The Langmuir isotherm shows the highest correlation coefficient (R2 > 0.97) with equilibrium parameters (RL) ranging between 0 and 1 for all three HPAMs, suggesting a favorable monolayer adsorption of HPAM onto CaCO3. The adsorption follows pseudo-second order kinetics, indicating that the interaction of HPAM with CaCO3 is largely dependent on the adsorbate concentration. An adsorption plot reveals that the amount of HPAM adsorbed onto CaCO3 at equilibrium increases with higher polymer molecular weight; the equilibrium adsorbed values for F3330S, F3530S and F3630S are approximately 0.24 mg/m2, 0.31 mg/m2, and 0.43 mg/m2, respectively. Zeta potential analysis shows that CaCO3 has a zeta potential of +12.32 mV, which transitions into negative values upon introducing HPAM. The point of zero charge (PZC) is observed at HPAM dosage between 10 to 30 ppm, in which the pH here lies between 9-10.

Keywords: adsorption isotherm; calcium carbonate; kinetics; polyacrylamide; polymer adsorption.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Molecular formula of HPAM.
Figure 2
Figure 2
Amount of F3330S (11–13 MDa), F3530S (15–17 MDa) and F3630S (18–20 MDa) adsorbed onto CaCO3 against concentration of polymer dosage (Lines are a guide to the eye).
Figure 3
Figure 3
Configuration of (a) low molecular weight HPAM and (b) high molecular weight HPAM on the CaCO3 surface.
Figure 4
Figure 4
Effect of the stirring time on the amount of F3530S adsorbed onto CaCO3.
Figure 5
Figure 5
t/Qt versus time (pseudo-second order kinetic model) for the adsorption of 300 ppm F3530S onto CaCO3. (R2 = 0.9996).
Figure 6
Figure 6
Qt versus t0.5 (intraparticle diffusion kinetic model) for the adsorption of 300 ppm F3530S onto CaCO3. (R2 = 0.949).
Figure 7
Figure 7
Langmuir adsorption isotherm model of F3330S, F3530S and F3630S adsorption onto CaCO3.
Figure 8
Figure 8
Zeta potential result of CaCO3 adsorbed with F3330S, F3530S and F3630S.
See this image and copyright information in PMC

References

    1. Wang S., Li G., Li Y., Guo J., Zhou S., Yong S., Pan B., Bai B. Adsorption of new hydrophobic polyacrylamide on the calcite surface. J. Appl. Polym. Sci. 2017;134:45314–45321. doi: 10.1002/app.45314. - DOI
    1. Mahmood A., Vissapragada B., Alghamdi A.H., Allen D., Herron M., Carnegie A., Dutta D., Olesen J.-R., Chourasiya R.D., Logan D., et al. A Snapshot of Carbonate Reservoir Evaluation. Oilfield Rev. 2000;12:20–41.
    1. Nouri A., Vaziri H., Belhaj H., Islam R. Effect of Volumetric Failure on Sand Production in Oil-Wellbores; Proceedings of the SPE—Asia Pacific Oil and Gas Conference and Exhibition; Jakarta, Indonesia. 9–11 September 2003; pp. 86–93. SPE 80448.
    1. Talaghat M.R., Esmaeilzadeh F., Mowla D. Sand production control by chemical consolidation. J. Pet. Sci. Eng. 2009;67:34–40. doi: 10.1016/j.petrol.2009.02.005. - DOI
    1. Mowar S., Zaman M., Stearns D.W., Roegiers J.C. Micro-mechanisms of pore collapse in limestone. J. Pet. Sci. Eng. 1996;15:221–235. doi: 10.1016/0920-4105(95)00065-8. - DOI

LinkOut - more resources