1. Enzyme-immobilized hierarchically porous covalent organic framework biocomposite for catalytic degradation of broad-range emerging pollutants in waterNada Elmerhi, Khadega Al-Maqdi, Khawlah Athamneh, Abdul Khayum Mohammed, Tina Škorjanc, Felipe Gándara, Jesus Raya, Pascal Simon, Olivier Siri, Ali Trabolsi, 2023, izvirni znanstveni članek Opis: Efficient enzyme immobilization is crucial for the successful commercialization of large-scale enzymatic water treatment.
However, issues such as lack of high enzyme loading coupled with enzyme leaching present challenges for the widespread adoption
of immobilized enzyme systems. The present study describes the development and bioremediation application of an enzyme
biocomposite employing a cationic macrocycle-based covalent organic framework (COF) with hierarchical porosity for the
immobilization of horseradish peroxidase (HRP). The intrinsic hierarchical porous features of the azacalix[4]arene-based COF
(ACA-COF) allowed for a maximum HRP loading capacity of 0.76 mg/mg COF with low enzyme leaching (<5.0%). The
biocomposite, HRP@ACA-COF, exhibited exceptional thermal stability (~200% higher relative activity than the free enzyme),
and maintained ~60% enzyme activity after five cycles. LCMSMS analyses confirmed that the HRP@ACA-COF system was able
to achieve >99% degradation of seven diverse types of emerging pollutants (2-mercaptobenzothiazole, paracetamol, caffeic acid,
methylparaben, furosemide, sulfamethoxazole, and salicylic acid)in under an hour. The described enzyme-COF system offers
promise for efficient wastewater bioremediation applications. Ključne besede: covalent organic frameworks, enzymes, emerging pollutants, water purification, biocomposite Objavljeno v RUNG: 11.08.2023; Ogledov: 794; Prenosov: 6 Celotno besedilo (1,45 MB) Gradivo ima več datotek! Več... |
2. Porous polycalix[n]arenes as environmental pollutant removersSalma Abubakar, Tina Škorjanc, Dinesh Shetty, Ali Trabolsi, 2021, pregledni znanstveni članek Opis: A new and innovative class of calixarene-based polymers emerged as adsorbents for a variety of compounds and ions in solution and vapor media. These materials take advantage of the modifiable rims and hydrophobic cavities of the calixarene monomers, in addition to the porous nature of the polymeric matrix. With main-chain calixarenes’ function as supramolecular hosts and the polymers’ high surface areas, polycalixarenes can effectively encapsulate target analytes. This feature is particularly useful for environmental remediation as dangerous and toxic molecules reversibly bind to the macrocyclic cavity, which facilitates their removal and enables repeated use of the polymeric sorbent. This Spotlight touches on the unique characteristics of the calixarene monomers and discusses the synthetic methods of our reported calixarene-based porous polymers, including Sonogashira–Hagihara coupling, and diazo and imine bond formation. It then discusses the promising applications of these materials in adsorbing dyes, micropollutants, iodine, mercury, paraquat, and perfluorooctanoic acid (PFOA) from water. In most cases, these reports cover materials that outperform others in terms of recyclability, rates of adsorption, or uptake capacities of specific pollutants. Finally, this Spotlight addresses the current challenges and future aspects of utilizing porous polymers in pollution treatment. Ključne besede: calixarene, polycalixarenes, porous polymers, pollutant removal, water purification Objavljeno v RUNG: 09.04.2021; Ogledov: 2224; Prenosov: 0 Gradivo ima več datotek! Več... |
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5. Highly efficient carcinogenic bromate removal from water by a cationic covalent organic frameworkTina Skorjanc, Dinesh Shetty, Felipe Gandara, Liaqat Ali, Ali Trabolsi, 2019, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: bromate, covalent organic frameworks, Zincke reaction, adsorption, water purification Objavljeno v RUNG: 03.09.2020; Ogledov: 2740; Prenosov: 0 Gradivo ima več datotek! Več... |
6. Fast and efficient removal of paraquat in water by porous polycalix [n] arenes (n= 4, 6, and 8)Dinesh Shetty, Sandra Boutros, Tina Škorjanc, Bikash Garai, Zouhair Asfari, Jesus Raya, Ali Trabolsi, 2020, izvirni znanstveni članek Ključne besede: paraquat, adsorption, calixarene, covalent polymers, water purification Objavljeno v RUNG: 02.09.2020; Ogledov: 2418; Prenosov: 0 Gradivo ima več datotek! Več... |
7. Remarkably efficient removal of toxic bromate from drinking water with a porphyrin–viologen covalent organic frameworkTina Skorjanc, Dinesh Shetty, Felipe Gandara, Liaqat Ali, Jesus Raya, Gobinda Das, Mark Anthony Olson, Ali Trabolsi, 2020, izvirni znanstveni članek Ključne besede: bromate, covalent organic frameworks, Zincke reaction, porphyrin, water purification, viologen Objavljeno v RUNG: 02.09.2020; Ogledov: 2561; Prenosov: 0 Gradivo ima več datotek! Več... |