Nanofiltration of wastewaters from olive oil production: Study of operating conditions and analysis of fouling by 2D fluorescence and FTIR spectroscopy

Cifuentes-Cabezas, Magdalena; Galinha, Cláudia F.; Crespo, João G.; Vincent‐Vela, María‐Cinta; Mendoza–Roca, J.A.; Álvarez-Blanco, Silvia

doi:10.1016/j.cej.2022.140025

Cited by 17 publications

(5 citation statements)

References 72 publications

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“…A novel approach was adopted by combining FTIR and 2D fluorescence spectroscopy to investigate membrane fouling. This innovative employment of spectroscopic techniques demonstrated their practicality in evaluating both fouling and the effectiveness of cleaning protocols [96]. Polycyclic aromatic hydrocarbons (PAHs) are toxic pollutants commonly found in various sources, such as industrial emissions and contaminated soil or water.…”

Section: Non-medical Applicationsmentioning

confidence: 99%

Fluorescence in depth: integration of spectroscopy and imaging with Raman, IR, and CD for advanced research

Aeindartehran,

Sadri,

Rahimi

et al. 2024

Methods Appl. Fluoresc.

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Fluorescence spectroscopy serves as a vital technique for studying the interaction between light and fluorescent molecules. It encompasses a range of methods, each presenting unique advantages and applications. This technique finds utility in various chemical studies. This review discusses Fluorescence spectroscopy, its branches such as Time-Resolved Fluorescence Spectroscopy (TRFS) and Fluorescence Lifetime Imaging Microscopy (FLIM), and their integration with other spectroscopic methods, including Raman, Infrared (IR), and Circular Dichroism (CD) spectroscopies. By delving into these methods, we aim to provide a comprehensive understanding of the capabilities and significance of fluorescence spectroscopy in scientific research, highlighting its diverse applications and the enhanced understanding it brings when combined with other spectroscopic methods. This review looks at each technique's unique features and applications. It discusses the prospects of their combined use in advancing scientific understanding and applications across various domains.

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Section: Non-medical Applicationsmentioning

confidence: 99%

Fluorescence in depth: integration of spectroscopy and imaging with Raman, IR, and CD for advanced research

Aeindartehran,

Sadri,

Rahimi

et al. 2024

Methods Appl. Fluoresc.

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“…NF membranes were rated to be the most appropriate candidate for the recovery of polyphenol compounds based on size exclusion. For instance, NF90 and NF270 membranes were frequently reported in the literature for the concentration of propolis extract [12], winery effluents [13], pequi aqueous extract [14] (, and olive mill wastewater [15]. More than 90% of the polyphenol compounds could be recovered using these membranes at high pressure, but fouling by lipids, protein and carbohydrates was inevitable.…”

Section: Nanofiltrationmentioning

confidence: 99%

State-of-the-art Membrane Processing of Solution Rich in Phenolic Compounds

Hamzah¹,

Leo²

2023

AMST

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Polyphenols and phenolic acids extracted from plants are natural antioxidants with high market value. However, they are susceptible to thermal processes, and a significant loss throughout food and beverage processing has been widely reported. This work reviews the state-of-the-aft membrane processing of the solution rich in phenolic compounds. Novel membrane processing allows phenolic concentration and water recovery simultaneously without using hazardous chemicals and high temperatures. Comparing pressure-driven membrane filtration processes with the advanced membrane processes at the low pressure in this review allowed the proper process selection to concentration phenolic coumpounds. Pressure-driven membrane filtration processes, namely microfiltration, ultrafiltration, nanofiltration, and reverse osmosis, have been studied. Nanofiltration membranes offer high retention of polyphenols due to their matching molecular weight cut-off. Osmotic distillation, membrane distillation and forward osmosis are membrane processes operated at low pressure. Osmotic distillation and forward osmosis require drawing solutions with osmotic pressure differences to separate water from phenolic compounds. A similar separation is attained in membrane distillation by creating vapour pressure differences. Membrane distillation without drawing solution is recommended since membrane fouling can be mitigated using superhydrophobic membranes with self-cleaning properties.

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“…Other studies in membrane processes involving biological and/or organic compounds showed that fluorescence spectroscopy also has great potential for monitoring fouling development [56][57][58][59]. In these studies, fluorescence EEMs obtained on membrane surfaces were used to assess not only fouling but also the effect of cleaning at the membrane surface.…”

Section: Machine Learning and 2d Fluorescence Spectroscopy For Mbr Mo...mentioning

confidence: 99%

Development and Implementation of MBR Monitoring: Use of 2D Fluorescence Spectroscopy

Galinha

Crespo

2022

Membranes

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The monitoring of a membrane bioreactor (MBR) requires the assessment of both biological and membrane performance. Additionally, the development of membrane fouling and the requirements for frequent membrane cleaning are still major concerns during MBR operation, requiring tight monitoring and system characterization. Transmembrane pressure is usually monitored online and allows following the evolution of membrane performance. However, it does not allow distinguishing the fouling mechanisms occurring in the system or predicting the future behavior of the membrane. The assessment of the biological medium requires manual sampling, and the analyses involve several steps that are labor-intensive, with low temporal resolution, preventing real-time monitoring. Two-dimensional fluorescence spectroscopy is a comprehensive technique, able to assess the system status at real-time without disturbing the biological system. It provides large sets of data (system fingerprints) from which meaningful information can be extracted. Nevertheless, mathematical data analysis (such as machine learning) is essential to properly extract the information contained in fluorescence spectra and correlate it with operating and performance parameters. The potential of 2D fluorescence spectroscopy as a process monitoring tool for MBRs is, therefore, discussed in the present work in view of the actual knowledge and the authors’ own experience in this field.

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Nanofiltration of wastewaters from olive oil production: Study of operating conditions and analysis of fouling by 2D fluorescence and FTIR spectroscopy

Cited by 17 publications

References 72 publications

Fluorescence in depth: integration of spectroscopy and imaging with Raman, IR, and CD for advanced research

Fluorescence in depth: integration of spectroscopy and imaging with Raman, IR, and CD for advanced research

State-of-the-art Membrane Processing of Solution Rich in Phenolic Compounds

Development and Implementation of MBR Monitoring: Use of 2D Fluorescence Spectroscopy

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