Novel polyacrylamide-based solid scale inhibitor

Ahmed A Younes; Heba H El-Maghrabi; Hager R Ali

doi:10.1016/j.jhazmat.2017.03.052

Novel polyacrylamide-based solid scale inhibitor

J Hazard Mater. 2017 Jul 15:334:1-9. doi: 10.1016/j.jhazmat.2017.03.052. Epub 2017 Mar 29.

Authors

Ahmed A Younes¹, Heba H El-Maghrabi², Hager R Ali³

Affiliations

¹ Department of Chemistry, Faculty of Science, Helwan University, Cairo, Egypt. Electronic address: ahmadow73@yahoo.com.
² Petroleum Refining Department, Egyptian Petroleum Research Institute (EPRI), Cairo, Egypt.
³ Analysis and Evaluation Department, Egyptian Petroleum Research Institute (EPRI), Cairo, Egypt.

PMID: 28384554
DOI: 10.1016/j.jhazmat.2017.03.052

Abstract

Novel solid-state phosphorus-containing polymer was synthesized, characterized and investigated as anti-scaling agent for the removal of alkaline earth metals ions from water. An optimization protocol for the sorption process of the metal ions on the polymer surface was proposed and executed. The protocol involved parameters such as pH, contact time, polymer dose, and the initial concentration of the metal ion. The optimum pH was found to be around seven for all of the tested metal ions. The maximum sorption capacities of the prepared polymer were 667, 794, 769 and 709 (mg/g) for Mg, Ca, Sr and Ba ions, respectively. Evaluation of the sorption process from the isotherm, kinetic and thermodynamic points of view was also studied. The experimental evidence revealed that the sorption obeys Langmuir isotherm model and follows a pseudo-second order mechanism. Moreover, the sorption process is exothermic. Possibility of polymer reuse was also investigated.

Keywords: Metal ion removal; Regeneration; Scale inhibition; Scale inhibitor; Sorption.