Raman Technology for Process Control: Waste Shell Demineralization for Producing Transparent Polymer Foils Reinforced with Natural Antioxidants and Calcium Acetate By-Products

Waste biogenic materials derived from seafood exploitation represent valuable resources of new compounds within the blue bioeconomy concept. Here, we describe the effectiveness of Raman technology implementation as an in-line tool for the demineralization process control of crustaceans or gastropods...

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Published inProcesses Vol. 12; no. 4; p. 832
Main Authors Pînzaru, Simona Cîntă, Poplăcean, Iuliana-Cornelia, Maškarić, Karlo, Dumitru, Dănuț-Alexandru, Barbu-Tudoran, Lucian, Tămaș, Tudor-Liviu, Nekvapil, Fran, Neculai, Bogdan
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.04.2024
Subjects
Acetic acid
Byproducts
Calcium
Calcium acetate
Carotenoids
Chitin
Control equipment
Crustacea
Crustaceans
Decision making
Demineralization
Demineralizing
Effectiveness
Energy consumption
Foils
Heavy metal content
Hydrochloric acid
Nonnative species
Organic compounds
Polymer industry
Polymers
Process controls
Product differentiation
Product introduction
Raman spectroscopy
Recrystallization
Seafood
Shells
Solvents
Spectrum analysis
Waste materials
Workloads
United Kingdom
Romania
Black Sea
Online AccessGet full text
ISSN2227-9717
2227-9717
DOI10.3390/pr12040832

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Abstract Waste biogenic materials derived from seafood exploitation represent valuable resources of new compounds within the blue bioeconomy concept. Here, we describe the effectiveness of Raman technology implementation as an in-line tool for the demineralization process control of crustaceans or gastropods. Transparent chitin polymeric foils and calcium acetate by-products were obtained from three waste crustacean shells (C. sapidus, S. mantis, and M. squinado) using a slow, green chemical approach employing acetic acid. Progressive mineral dissolution and increasing of the Raman characteristic signal of chitin is shown in a time-dependent manner using NIR-Raman spectroscopy, while resonance Raman shows intact carotenoids in reacted shells after 2 weeks. Chitin foil products are species-specific, and the demineralization bath of the waste shell mixture can be effectively tracked by Raman tools for solvent control and decision making for the recovery of calcium acetate by-products. Comparatively obtained calcium acetate from Rapana venosa snail shells, the subject of Raman analyses, allowed assessing by-product identity, hydration status, purity, and suitability as recrystallized material for further use as a pharmaceutical compound derived from different crustaceans or gastropod species. Cross validation of the results was done using FT-IR, XRD, and SEM-EDX techniques. A hand-held flexible TacticID Raman system with 1064 nm excitation demonstrated its effectiveness as a rapid, in-line decision making tool during process control and revealed excellent reproducibility of the lab-based instrument signal, suitable for in situ evaluation of the demineralization status and solvent saturation control.
AbstractList Waste biogenic materials derived from seafood exploitation represent valuable resources of new compounds within the blue bioeconomy concept. Here, we describe the effectiveness of Raman technology implementation as an in-line tool for the demineralization process control of crustaceans or gastropods. Transparent chitin polymeric foils and calcium acetate by-products were obtained from three waste crustacean shells (C. sapidus, S. mantis, and M. squinado) using a slow, green chemical approach employing acetic acid. Progressive mineral dissolution and increasing of the Raman characteristic signal of chitin is shown in a time-dependent manner using NIR-Raman spectroscopy, while resonance Raman shows intact carotenoids in reacted shells after 2 weeks. Chitin foil products are species-specific, and the demineralization bath of the waste shell mixture can be effectively tracked by Raman tools for solvent control and decision making for the recovery of calcium acetate by-products. Comparatively obtained calcium acetate from Rapana venosa snail shells, the subject of Raman analyses, allowed assessing by-product identity, hydration status, purity, and suitability as recrystallized material for further use as a pharmaceutical compound derived from different crustaceans or gastropod species. Cross validation of the results was done using FT-IR, XRD, and SEM-EDX techniques. A hand-held flexible TacticID Raman system with 1064 nm excitation demonstrated its effectiveness as a rapid, in-line decision making tool during process control and revealed excellent reproducibility of the lab-based instrument signal, suitable for in situ evaluation of the demineralization status and solvent saturation control.
Audience Academic
Author Poplăcean, Iuliana-Cornelia
Barbu-Tudoran, Lucian
Neculai, Bogdan
Nekvapil, Fran
Tămaș, Tudor-Liviu
Maškarić, Karlo
Dumitru, Dănuț-Alexandru
Pînzaru, Simona Cîntă
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Snippet Waste biogenic materials derived from seafood exploitation represent valuable resources of new compounds within the blue bioeconomy concept. Here, we describe...
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SubjectTerms Acetic acid
Byproducts
Calcium
Calcium acetate
Carotenoids
Chitin
Control equipment
Crustacea
Crustaceans
Decision making
Demineralization
Demineralizing
Effectiveness
Energy consumption
Foils
Heavy metal content
Hydrochloric acid
Nonnative species
Organic compounds
Polymer industry
Polymers
Process controls
Product differentiation
Product introduction
Raman spectroscopy
Recrystallization
Seafood
Shells
Solvents
Spectrum analysis
Waste materials
Workloads
Title Raman Technology for Process Control: Waste Shell Demineralization for Producing Transparent Polymer Foils Reinforced with Natural Antioxidants and Calcium Acetate By-Products
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