Generation of multi-functional core-shell adsorbents: simultaneous adsorption of cesium, strontium and rhodamine B in aqueous solution

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 112; pp. 201 - 209
• Main Authors: Park, Bumjun, Kim, Jigyeong, Ghoreishian, Seyed Majid, Rethinasabapathy, Muruganantham, Huh, Yun Suk, Kang, Sung-Min
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.08.2022; 한국공업화학회
• Subjects: Adsorbent; Adsorption; Core–shell particle; Magnetic separation; Multi-function; Tetrapod needle injector; 화학공학; Tetrapod needle injector; Adsorption; Core–shell particle; Magnetic separation; Adsorbent; Multi-function
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2022.05.014

[Display omitted] •Successful synthesis of multi-functional adsorbents through tetrapod needle injector.•Tri-functional core fabricated in spherical shape with three clear distinct hemispheres.•Magnetic nanoparticles-encapsulated shell formed through chemical co-precipitation.•Simultaneous Cs+, Sr2+, and Rh B adsorption capacity with very fast kinetics.•Separation of multi-functional adsorbents under magnetic field after simultaneous adsorption. In this study, we design and synthesize multi-functional adsorbents using a customized needle injector and determine the simultaneous adsorption performance toward hazardous materials, including radioactive cesium (Cs+), strontium (Sr2+), and chemical dye rhodamine B (Rh B). A tri-functional core is synthesized using a tetrapod needle injector, which is equipped with an aligner and a supporter to align the syringe needles, to rapidly realize a one-step encapsulation of functional reagents including Prussian blue, hydroxyapatite, and MXene. Subsequently, a magnetic shell is generated via a chemical co-precipitation process. Results show that the simultaneous adsorption behaviors of the adsorbents toward the three hazardous materials are consistent with the Langmuir model, where maximum adsorption capacities of 42.744, 27.669, and 18.440 mg g−1 are recorded for Cs+, Sr2+, and Rh B, respectively. In addition, the adsorbents are separated from the aqueous solution within 5 s by the introduction of external magnetic fields, which can be applied to magnetic actuation. We believe that the generated multi-functional adsorbents can facilitate the development of multi-functional materials and provide significant guidelines for water remediation, particularly on radioactive isotopes and chemical dyes.