More accurate and more efficient: Penicillinase-immobilized phase-change microcapsules for detection and removal of penicillins under microenvironmental thermal management
Journal of Environmental Chemical Engineering, ISSN: 2213-3437, Vol: 11, Issue: 1, Page: 109148
2023
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Article Description
Aiming at a high thermal sensitivity of penicillinase (Pen X) in the enzyme-catalyzed hydrolytic reaction of penicillins, we developed a novel type of Pen X-immobilized phase-change microcapsules with a thermo-temperature regulation function for enhancing the detection accuracy and removal efficiency of penicillins under high temperature environments. The microcapsules were constructed by microencapsulating n -docosane in a SiO 2 shell, followed by decorating a biocompatible chitosan coating layer on the shell surface and then immobilizing Pen X through covalent bonding. The resultant Pen X-immobilized microcapsules exhibit a well-defined core-shell microstructure and a regular spherical morphology, together with the desired chemical compositions and structures. The microcapsules present a high heat storage capacity of over 125 J/g to regulate their microenvironmental temperature through reversible phase transitions by their n -docosane core. This enables the Pen X-immobilized microcapsules to achieve a higher enzyme activity at high assay temperatures compared to conventional immobilized Pen X, resulting in a high removal rate of 94.71 % for Pen G elimination and an extremely high recovery rate of nearly 100 % for Pen G determination. Based on their superior biocatalytic capability at high temperatures, the Pen X-immobilized microcapsules developed in this study exhibit great application potential for high-accurate detection and high-efficient removal of penicillins in harsh conditions.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S2213343722020218; http://dx.doi.org/10.1016/j.jece.2022.109148; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85144824221&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S2213343722020218; https://dx.doi.org/10.1016/j.jece.2022.109148
Elsevier BV
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