Muhammad Yudhistira Azis, Sri Wahyuni, Cessoria Phiannissha, Muhammad Ali Zulfikar, Henry Setiyanto

Optimizing Parameters of Xylenol Neodymium Imprinted Polymers (Nd-IPs) for Neodymium (III) Ions Adsorption

Introduction

Optimizing parameters of xylenol neodymium imprinted polymers (nd-ips) for neodymium (iii) ions adsorption . Optimizing Nd-IPs for Neodymium (III) ion adsorption. Parameters, isotherms, and kinetics evaluated, achieving 30.36 mg/g capacity and high selectivity.

Abstract

Performance evaluation of metal Neodymium Imprinted Polymers (Nd-IPs) through the polymerization of methyl metaacrylate with divinyl benzene in the presence of a metal complex Nd(III)-Xylenol Orange (XO) has been investigated. The adsorption capability towards Nd(III) ion were optimized based on ion retention parameters, such as pH, contact time, concentration, adsorption isotherm, and kinetic studies. The synthesized Nd-IPs obtained Nd(III) adsorption capacity reached 30.36 mg.g-1 at a pH of 5 with 20 minutes contact time. The isotherm studies showed the preference of Freundlich isotherm over Langmuir isotherm. The selectivity coefficient of Nd-IPs to ion Nd+3/La+3 are 1.35 and 1.38, then selectivity coefficient value obtained 1.35 and 1.40 for Nd+3/Y+3.

Review

The manuscript "Optimizing Parameters of Xylenol Neodymium Imprinted Polymers (Nd-IPs) for Neodymium (III) Ions Adsorption" presents a focused investigation into the performance characteristics of Neodymium Imprinted Polymers for the selective adsorption of Nd(III) ions. This work addresses a highly pertinent area given the increasing demand for rare earth elements and the need for efficient and selective recovery methods from various matrices. The study's primary objective—optimizing key adsorption parameters—is crucial for advancing the practical application of these specialized polymeric materials in environmental remediation or resource recovery. The authors systematically evaluated the adsorption capabilities of the synthesized Nd-IPs by optimizing critical ion retention parameters, including solution pH, contact time, and initial metal ion concentration. Comprehensive adsorption isotherm and kinetic studies were also performed, providing mechanistic insights into the adsorption process. Notably, the synthesized Nd-IPs demonstrated a maximum Nd(III) adsorption capacity of 30.36 mg.g-1, achieved under optimal conditions of pH 5 and a relatively rapid contact time of 20 minutes. The preference for the Freundlich isotherm suggests a heterogeneous adsorption mechanism. Furthermore, the study quantified the selectivity of the Nd-IPs, reporting selectivity coefficients for Nd(III)/La(III) in the range of 1.35-1.38, and for Nd(III)/Y(III) between 1.35-1.40, indicating a degree of preferential binding. In conclusion, this research provides a valuable and systematic optimization study of Nd-IPs for Neodymium (III) adsorption, contributing significant data to the field of rare earth element separation. The rigorous optimization of parameters and the detailed characterization of adsorption behavior are strengths of this work, offering clear guidelines for future applications. While the reported adsorption capacity is respectable, further improvements in selectivity, particularly against closely related rare earth elements, could enhance the practical utility of these polymers. Overall, the findings are clear, well-supported by the presented data in the abstract, and lay a solid foundation for the continued development of efficient and selective materials for neodymium recovery.

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