Guest Editors
Prof. Rui Wang
Email: wangrui@sdu.edu.cn
Affiliation: School of Environmental Science and Engineering, Shandong University, Jingshi Road, Jinan, China
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Research Interests: ion-imprinting polymers; hydrogel fabrication methods; catalyst; selective catalytic eeduction; functional monomers

Dr. Mahshab Sheraz
Email: mahshabsheraz001@gmail.com
Affiliation: School of Environmental Science and Engineering, Shandong University, Jingshi Road, Jinan, China
Homepage:
Research Interests: sustainable polymeric materials; hybrid materials design; waste-to-resource conversion; advanced materials fabrication methods; sustainable engineering

Summary
Over the past decade, significant progress has been made in the development of ion-imprinting polymers (IIPs) and hydrogels, driven by the need for highly selective ion recognition and removal in environmental, biomedical, and industrial applications. By creating tailor-made binding sites for specific target ions, these materials offer exceptional selectivity, high adsorption capacity, and strong reusability. Recent innovations in functional monomer design, crosslinking strategies, and hybrid material integration have further improved their mechanical stability, chemical resistance, and overall performance in diverse operating environments. Such advancements have positioned IIPs and hydrogels as key materials for sustainable water treatment, nutrient recovery, pollutant remediation, sensing, and biomedical applications.
This Special Issue aims to collect high-quality original research articles, communications, and reviews focusing on the design, synthesis, characterization, and performance evaluation of IIPs and hydrogels.
Topics of interest include, but are not limited to:
· Advanced fabrication and crosslinking methods
· Novel functional monomers and hybrid systems for improved selectivity
· Environmental applications such as heavy metal removal and nutrient recovery
· Sensing, biosensing, and biomedical applications
· Sustainable and green synthesis approaches
We invite contributions that advance the development of IIPs and hydrogels toward innovative, efficient, and sustainable solutions for selective ion recognition and resource management.
Keywords
Ion-imprinting Polymers; Hydrogels; Selective Ion Recognition; Heavy Metal Removal; Nutrient Recovery; Adsorption; Environmental Remediation; Sustainable Materials; Green Synthesis.