The Preparation of Modified Industrial Waste Polyacrylonitrile for the Adsorptive Recovery of Pt(IV) from Acidic Solutions

Abstract

Sorption technique is one of the most effective methods for recovering precious metals from wastewater solutions; however, its main drawbacks of the traditional sorbents are the slow kinetics and relatively low sorption capacities. As a solution, thin sorbent fibers have been highlighted because they can lead to fast adsorption kinetics due to their high surface areas and numerous binding sites. In this sense, the applicability of an industrial waste polyacrylonitrile (PAN) textile was examined to recover Pt(IV) from acid solutions. In order to enrich cationic functional groups on the surface of a PAN textile, the textile was chemically modified via polyethylenmine (PEI) coating. Afterwards, using PEI-coated PAN fiber, batch sorption experiments (isotherms and kinetics) and column experiments were conducted to evaluate its sorption performance toward Pt(IV). It was clearly revealed in column experiments that the PEI-coated waste PAN textile (WPAN) has fast kinetics and good performance for Pt(IV) recovery.

Research into complexing properties of polyacrylonitrile complexite in the mixtures of water-dioxane

“…For the complexite NAG, HMCC in the composition of 1:1 are formed in aqueous medium. In this case, attachment of metal ions takes place gradually and the shape of curves (they have a degree) is identical to that commonly observed for LMCC [2,5,15]. In other words, for NAG HMCC, coordination nodes M:L=1:1 are formed in water.…”

“…Thus, authors [10][11][12] studied processes of adsorption of copper(II) on the modified polyacrylonitrile nano-fiber by the method of atomic adsorption. Polyacrylonitrile modified fibers were investigated with a view to their practical application for selective sorption of ions of Cr(III) [13], Pd(II), Pt(IV) [14,15]. In this case, the authors of [10][11][12][13][14][15] resolve issues related only to quantitative characteristics of sorption processes, without identifying mechanisms of the process, stoichiometry of resulting complexes.…”

“…An analysis of the scientific literature [10][11][12][13][14][15][16][17] indicates the fact that the systems with polymer ligands in aqueous-organic solvents in the presence of transition metal ions are not studied sufficiently. It is expedient to examine the complexation processes in such complex systems based on the exploration of influence of a solvating factor on the reactivity of groups in polymers, and on their matrix.…”

A Facile One-Pot Strategy to Functionalize Graphene Oxide with Poly(amino-phosphonic Acid) Derived from Wasted Acrylic Fibers for Effective Gd(III) Capture

“…Waste acrylic fibers, a major textile waste, are produced in huge volumes around the world due to the growth in world population, and the conventional disposal methods are landfilling or incineration, which cause serious resource waste and environmental pollution. − Large amounts of WAFs have to be disposed of every year. Since it contains a high content of cyano group, converting cyano group into APA group under one-step reaction conditions for recovery of toxic metal ions is an attractive way for value-added recycling of WAFs.…”

Polyethyleneimine impregnated alginate capsule as a high capacity sorbent for the recovery of monovalent and trivalent gold

“…Therefore, gold recovery from e-waste and wastewater is crucial for saving the economy and the environment. Gold can be of monovalent and/or trivalent forms in the solution phases.Presently, several technologies such as adsorption, solvent extraction, membrane separation, chemical precipitation, and ion exchange have been applied for the recovery of gold recovery from the leaching solutions [12][13][14][15][16] . Among them, the adsorption method has been widely applied because of its sustainability, promising, simplicity, eco-friendliness, low operating cost, and high efficiency 17,18 .…”