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Valorization of Keratin Waste as a Functional Precursor for PLA/SBS Composite Adsorbent Films

by Predescu, Andra Mihaela , Chiriță, Corina Violeta , Dincă, Laurențiu , Gaidău, Carmen , Nicolae, Cristian-Andi , Popescu, Ramona Eugenia , Gabor, Augusta Raluca , Râpă, Maria , Darie-Niță, Raluca Nicoleta

in Adsorbents / Adsorption / Aqueous solutions / Biomass / Cellulose / Chromium / Circular economy / Composite materials / Efficiency / Flexibility / Fourier transforms / Heavy metals / Infrared spectroscopy / Keratin / Mechanical properties / Membranes / Molecular weight / Morphology / Photocatalysis / Polyethylene glycol / Polymers / Scanning electron microscopy / Sheep / Spectrum analysis / Sulfur content / Thermodynamic properties / Toxicity / Wool

2026

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Valorization of Keratin Waste as a Functional Precursor for PLA/SBS Composite Adsorbent Films

2026

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Valorization of Keratin Waste as a Functional Precursor for PLA/SBS Composite Adsorbent Films

2026

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Journal Article

Valorization of Keratin Waste as a Functional Precursor for PLA/SBS Composite Adsorbent Films

Predescu, Andra Mihaela,

Chiriță, Corina Violeta,

Dincă, Laurențiu,

Gaidău, Carmen,

Nicolae, Cristian-Andi,

Popescu, Ramona Eugenia,

Gabor, Augusta Raluca,

Râpă, Maria,

Darie-Niță, Raluca Nicoleta

2026

Overview

This study investigated the valorization of keratin extracted from sheep wool waste for the preparation of PLA/SBS/Keratin composites as potential adsorbents for the removal of chromium (Cr) from synthetic water. A flexible formulation containing 75 wt% PLA and 25 wt% SBS was selected for the incorporation of 10 wt%, 20 wt%, and 30 wt% keratin. The morphology and structural characteristics of keratin and PLA-based composites were analyzed using SEM and FT-IR spectroscopy. The mechanical and thermal properties of the prepared composites were investigated using TGA and DMA analyses. The adsorption experiments revealed that keratin exhibited an adsorption capacity of 57.57 mg g of Cr(VI) removal efficiency, while the PLA/SBS formulation containing 10 wt% keratin achieved a removal efficiency of total Cr of 55.41%. After three regeneration cycles, the removal efficiency decreased by approximately half of the total Cr removal.

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Publisher

MDPI AG,Multidisciplinary Digital Publishing Institute (MDPI)

Subject

/ Biomass