INTERPOLYMER SYSTEMS OF POLY(METHACRYLIC ACID): POLY(4-VINYLPYRIDINE) FOR THE SELECTIVE SORPTION AND DESORPTION OF RHENIUM IONS

Arman Baishibekov, Talkybek Jumadilov, Dametken Fischer, Józef Tadeusz Haponiuk, S. Temirova, Sultan Yulusov, Bagdat Altaibayev, D. Karim

2025

Closed access Metadata (CSL-JSON)
DOI 10.51580/2025-4.2710-1185.52
Data confidence 70 medium
How this score is calculated

It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.

Abstract

Rhenium is a rare transition metal used in alloys and catalysis. Industrial recovery comes mainly from sulfuric acid effluents formed during copper and molybdenum processing. Sorption is the main method, but the choice of effective sorbents remains an issue. Aims. Interpolymer systems (IPS) of poly(methacrylic acid) (PMAA) and poly(4-vinylpyridine) (P4VP) were prepared and tested. IPS samples with different PMAA:P4VP ratios were prepared and tested. Sorption capacity, desorption behavior, and structural as well as thermal characteristics were investigated. Results and Discussion. The sorption efficiency varies with polymer composition. The 2:4 PMAA:P4VP ratio gave the highest uptake. Desorption in 2% nitric acid was moderate, with a maximum of about 75.6%. FTIR spectra showed shifts in carboxyl and pyridyl bands, confirming the role of functional groups. TGA/DSC data indicated stabilization of the polymer network after rhenium binding. Conclusion. The PMAA:P4VP system at a 2:4 ratio combined high sorption, moderate desorption, and improved structural stability. This system may be applied for rhenium recovery from metallurgical wastewater.