Enhanced boron recovery by a new synthesized polyvinyl alcohol anchored gallic acid moiety via ethyl carbamate linker

ABSTRACT

An innovative promising Gallic acid anchored poly vinyl alcohol via ethyl carbamate linker (PVA-EC-GA), was functionalized to extract boron from a tourmaline ore sample from Sikait area in South Eastern Desert of Egypt, which assaying 10.45% boron oxide. Specifications for PVA-EC-GA composite were accomplished by employing a variety of methods including XPS, FT-IR, EDX, BET, ¹ H-NMR, TGA, ¹³C-NMR and GC-MS analyses, which assure an equitable prepare of PVA-EC-GA. Investigational measurements, namely: pH, agitation time, initial concentration of boron, composite dose, co-ions, temp. and agents of eluting, have been improved. At 25°C, pH 10, 20 min agitation and 0.0092 mol/L boron ions, PVA-EC-GA composite has an extreme uptake capacity of 43.75 mg per gram which is equivalent to 175 mg/L boron ions. From the isotherm modeling, Langmuir’s quite fitting the practical data. Conferring to kinetic modeling, pseudo-second order kinetic model well predicted the kinetics of boron ions adsorption by PVA-EC-GA giving a theoretical retention capacity of 43.86 mg/g. Thermodynamic prospects expose that the adsorption process was expected as an exothermic, spontaneous, and preferable adsorption at low temp. Boron ions can be eluted from the loaded composite, by 0.5 M H₂SO₄ with a 97% effectiveness

KEYWORDS:

• Boron recovery
• poly vinyl alcohol anchored gallic acid
• boron adsorption
• tourmaline ore

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Correction

Acknowledgments

The authors extend their appreciation to the Ministry of Education in KSA for funding this research work though the project number KKU-IFP2-DA-8.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Novelty statement

• An innovative promising Gallic acid anchored poly vinyl alcohol via ethyl carbamate linker (PVA-EC-GA) was successfully prepared.

• The prepared PVA-EC-GA was successfully characterized with several tools and confirmed.

• PVA-EC-GA was utilized for modeling and optimizing adsorption of Boron.

• The mechanism of adsorption of Boron was proposed

• Boron was successfully separated as Boric acid from working Sikait tourmaline ore sample.

Correction Statement

This article was originally published with errors, which have now been corrected in the online version. Please see Correction (http://dx.doi.org/10.1080/01496395.2024.2320480)