Design, synthesis and characterization of MOF-199 and ZIF-8: Applications in the adsorption of phenols derivatives in aqueous solution

This research presents the modification of MOF-199 and ZIF-8 using furfuryl alcohol (FA) as a carbon source to subsequently fix lipase from Pseudomonas cepacia and use these biocatalysts in the transesterification of African palm oil (APO). The need to overcome the disadvantages of free lipases in the biodiesel production process led to the use of metal organic framework (MOF)-type supports because they provide greater thermal stability and separation of the catalytic phase, thus improving the activity and efficiency in relation to the use of free lipase, disadvantages that could not be overcome with the use of other types of catalysts used in transesterification/esterification reactions for the production of biodiesel. The modification of MOFs ZIF-8 and MOF-199 with FA increases the pore volume which allows better immobilization of Pseudomonas cepacia lipase (PCL). The results show that these biocatalysts undergo transesterification with biodiesel yields above 90%. Additionally, studies were carried out on the effect of (1) enzyme loading, 2) enzyme immobilization time, (3) enzyme immobilization temperature, and (4) pH on the % immobilization of the enzyme and the specific activity. The results show that the highest immobilization efficiency for the FA@ZIF-8 support has a value of 91.2% when the load of this support was 3.5 mg/mg and has a specific activity of 142.5 U/g protein. The FA@MOF-199 support presented 80.3% enzyme immobilization and 125% U/g specific activity protein. We established that the specific activity increases in the period from 0.5 to 5.0 h for the systems under investigation. After this time, both the specific activity and the % efficiency of enzyme immobilization decrease. Therefore, 5.0 h (immobilization efficiency of 95 and 85% for FA@MOF-199, respectively) was chosen as the most appropriate time for PCL immobilization. Methods of adding methanol, with three and four steps, were tested, where biodiesel yields greater than 90% were obtained for the biocatalysts synthesized in this

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“…The behavior of the isotherms is the same; however, here the commercial samples were used, so the textural values changed. 56 …”

Section: Resultsmentioning

confidence: 99%

“…It should be noted that the analysis of the adsorption isotherms for the two MOFs used in this research study was the same as that carried out in a previous publication. The behavior of the isotherms is the same; however, here the commercial samples were used, so the textural values changed …”

Section: Resultsmentioning

confidence: 99%

Biodiesel Production from Transesterification with Lipase from Pseudomonas cepacia Immobilized on Modified Structured Metal Organic Materials

et al. 2022

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“…Most of these dyes, highly toxic to aquatic organisms and human beings are usually discharged directly to water thereby contaminating the natural resources 6 . Various conventional techniques like adsorption using activated carbon, ultra‐filtration/reverse osmosis using various membranes, oxidation using biological agents, and so forth, have serious limitations 7–9 . The degradation products of most organic dyes are far more toxic than parent compounds demanding the urgent need for innovative technological solutions 10–14 .…”

Section: Introductionmentioning

confidence: 99%

Photoassisted degradation of rhodamine B using poly(ε‐caprolactone) based nanocomposites: Mechanistic and kinetic features

Elias

Sarathchandran

Joseph

et al. 2021

J of Applied Polymer Sci

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The efficiency of poly (ε‐caprolactone)‐cloisite 10A nanocomposite membrane in removing/degrading of an amphoteric dye (rhodamine B) from aqueous samples under visible light is investigated in detail. Nanocomposite membranes were prepared by electrospinning technique using acetone‐chloroform mixture as solvent. The synthesized nanocomposites were used to degrade rhodamine B from aqueous samples under visible light conditions using a 50 W light‐emitting diode lamb. Samples were withdrawn at definite intervals of 30 min and analyzed using UV–vis spectroscopy, LC‐Q‐ToF/MS‐MS, and antibacterial studies. Detailed chemistry of the rhodamine B degradation is reported by interpreting experimental results and using first‐principles density functional theory calculations. Cytotoxicity tests confirm the eco‐friendly nature of end product obtained. Nanocomposite with 9 wt% of cloisite 10A, effectively converts rhodamine B to eco‐friendly products within almost 3 h. To the best of our knowledge, no work has been reported on the use of poly(ε‐caprolactone)‐cloisite 10A nanocomposites for dye removal from water samples.

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Adsorption study of p-nitrophenol on a silver(I) triazolate MOF

et al. 2020

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Design, synthesis and characterization of MOF-199 and ZIF-8: Applications in the adsorption of phenols derivatives in aqueous solution

Cited by 13 publications

References 73 publications

Biodiesel Production from Transesterification with Lipase from Pseudomonas cepacia Immobilized on Modified Structured Metal Organic Materials

Biodiesel Production from Transesterification with Lipase from Pseudomonas cepacia Immobilized on Modified Structured Metal Organic Materials

Photoassisted degradation of rhodamine B using poly(ε‐caprolactone) based nanocomposites: Mechanistic and kinetic features

Adsorption study of p-nitrophenol on a silver(I) triazolate MOF

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