Physics Maths Engineering

A Fixed-Bed Column with an Agro-Waste Biomass Composite for Controlled Separation of Sulfate from Aqueous Media

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Mostafa Solgi,

Mostafa Solgi

Department of Chemistry, University of Saskatchewan, Saskatoon, SK S7N 5C9, Canada


Bernd G. K. Steiger,

Bernd G. K. Steiger

Department of Chemistry, University of Saskatchewan, Saskatoon, SK S7N 5C9, Canada


Lee D. Wilson

Lee D. Wilson

Department of Chemistry, University of Saskatchewan, Saskatoon, SK S7N 5C9, Canada


  Peer Reviewed

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© attribution CC-BY

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2024-12-01

Doi: http://dx.doi.org/10.3390/separations10040262
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Abstract

Key Questions

Microbial Pigment Production

How can bacteria produce natural pigments? Bacteria can produce natural pigments by growing on feather meal biomass. Specifically, Chryseobacterium sp. kr6 was used to produce yellow pigments1 . What are new sources of natural food colorants? Feather waste can be used as a substrate to produce natural pigments, offering a new source of natural food colorants1 . Can feather waste be used to produce pigments? Yes, feather waste in the form of feather meal biomass can be used to produce pigments by growing Chryseobacterium sp. kr6 on it1 .

Pigment Extraction Methods

What are effective methods to extract bacterial pigments? Ultrasound extraction and mechanical extraction are effective methods to extract bacterial pigments1 . How does ultrasound extraction compare to mechanical extraction? The study found that ultrasound extraction was more effective than mechanical extraction for extracting bacterial pigments1 . Which solvents work best for extracting bacterial pigments? Acetone was found to be an effective solvent for extracting bacterial pigments in this study1 .

Pigment Characterization

What are the properties of pigments from Chryseobacterium sp.? The pigments from Chryseobacterium sp. kr6 were yellow in color and showed antioxidant and antimicrobial properties1 . How can bacterial pigments be analyzed and identified? The study partially characterized the bacterial pigments, likely using techniques such as spectroscopy and chemical analysis1 . Do bacterial pigments have antioxidant properties? Yes, the pigments produced by Chryseobacterium sp. kr6 showed antioxidant properties1 .

Applications

What are potential uses for microbial pigments? Microbial pigments have potential applications in food, cosmetics, and other industries as natural colorants1 . Can bacterial pigments replace synthetic food colorants? The study suggests that bacterial pigments could potentially replace synthetic food colorants, offering a natural alternative1 . Do microbial pigments have antimicrobial properties? Yes, the pigments produced by Chryseobacterium sp. kr6 showed antimicrobial properties1

The paper explores using deep eutectic solvents to extract polyphenols from grape pomace. It compares different solvent compositions and extraction conditions. The study found that deep eutectic solvents can efficiently extract polyphenols from grape waste. These extracts showed antioxidant properties, suggesting potential applications in food, cosmetics, and pharmaceuticals. The research demonstrates a sustainable method to valorize grape industry by-products.

Abstract

An agro-waste composite with a pelletized form was prepared and characterized via IR and 13C solids NMR spectroscopy. Thermal gravimetry analysis (TGA) was used to study the weight loss profiles, while SEM images provided insight on the biocomposite morphology, along with characterization of the sulfate adsorption properties under equilibrium and dynamic conditions. The sulfate monolayer adsorption capacity (qe = 23 mg/g) of the prepared agro-waste pellets was estimated from the adsorption isotherm results by employing the Langmuir model, and comparable fitting results were obtained by the Freundlich model. The dynamic adsorption properties were investigated via adsorption studies with a fixed bed column at pH 5.2. The effects of various parameters, including flow rate, bed height and initial concentrations of sulfate, were evaluated to estimate the optimal conditions for the separation of sulfate. The experimental data of the breakthrough curves were analyzed using the Thomas and Yoon–Nelson models, which provided satisfactory best-fits for the fixed bed kinetic adsorption results. The predicted adsorption capacities for all samples according to the Thomas model concur with the experimental values. The optimum conditions reported herein afford the highest dynamic adsorption capacity (30 mg/g) as follows: 1100 mg/L initial sulfate concentration, 30 cm bed height and 5 mL/min flow rate. The breakthrough time was measured to be 550 min. This study contributes to a strategy for controlled separation of sulfate using a sustainable biocomposite material that is suitable for fixed-bed column point-of-use water treatment systems.

Related Subjects
Physics
Math
Chemistry
Computer science
Engineering
Earth science
Biology
copyright icon

© attribution CC-BY

  • 0

rating
59 Views

Added on

2024-12-01

Doi: http://dx.doi.org/10.3390/separations10040262
Related Subjects
Physics
Math
Chemistry
Computer science
Engineering
Earth science
Biology