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Article

Characterisation and Traceability of Calcium Carbonate from the Seaweed Lithothamnium calcareum

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Faculty of Pharmaceutical Sciences, University of São Paulo, Av. Prof. Lineu Prestes, 580, Butantã, São Paulo CEP 05508-900, Brazil
2
Institute of Geosciences, University of São Paulo, Rua do Lago 562, São Carlos, São Paulo CEP 05508-080, Brazil
3
Centre for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), Av. dos Estados, 5001, Santo André, São Paulo CEP 09210580, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Guido Kickelbick
Solids 2021, 2(2), 192-211; https://doi.org/10.3390/solids2020013
Received: 24 February 2021 / Revised: 1 April 2021 / Accepted: 6 April 2021 / Published: 6 May 2021
(This article belongs to the Special Issue Feature Papers of Solids 2021)
Calcium carbonate (CaCO3) from the seaweed Lithothamnium calcareum is a suitable dietary supplement for the prevention of osteoporosis, due to its chemical composition. This study compared CaCO3 from L. calcareum to CaCO3 from oyster shell and inorganic minerals that are already used in the pharmaceutical industry. The Rietveld refinement of the XRD showed that the mineral fraction of L. calcareum is composed of aragonite (50.3 wt%), magnesian calcite (45.3 wt%), calcite (4.4 wt%), comin contrast to oyster shell and inorganic minerals, which contain only calcite. The morphology of L. calcareum carbonate particles is granular xenomorphic, which is distinct from the scalenohedral form of inorganic calcite and the fibrous and scale-like fragments of oyster shell. The crystal structures of aragonite and magnesian calcite, present in L. calcareum, have higher contents of oligoelements than the pure calcite in other materials. The isotopic composition (stable isotopes of carbon and oxygen) is heavy in the CaCO3 from L. calcareum13C = 1.1‰; δ18O = −0.1‰) and oyster shell (δ13C = −4‰; δ18O = −2.8‰) in marked contrast to the much lighter isotopic composition of inorganic mineral CaCO313C = −19.2‰; δ18O = −26.3‰). The differences indicated above were determined through principal component analysis, where the first and second principal components are sufficient for the clear distinction and traceability of CaCO3 sources. View Full-Text
Keywords: calcium carbonate; Lithothamnium calcareum; traceability of CaCO3 sources; trace elements in calcium carbonates calcium carbonate; Lithothamnium calcareum; traceability of CaCO3 sources; trace elements in calcium carbonates
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MDPI and ACS Style

da Silva, R.P.; Kawai, G.S.D.; Andrade, F.R.D.d.; Bezzon, V.D.N.; Ferraz, H.G. Characterisation and Traceability of Calcium Carbonate from the Seaweed Lithothamnium calcareum. Solids 2021, 2, 192-211. https://doi.org/10.3390/solids2020013

AMA Style

da Silva RP, Kawai GSD, Andrade FRDd, Bezzon VDN, Ferraz HG. Characterisation and Traceability of Calcium Carbonate from the Seaweed Lithothamnium calcareum. Solids. 2021; 2(2):192-211. https://doi.org/10.3390/solids2020013

Chicago/Turabian Style

da Silva, Rosana P., Giovanna S.D. Kawai, Fabio R.D.d. Andrade, Vinicius D.N. Bezzon, and Humberto G. Ferraz. 2021. "Characterisation and Traceability of Calcium Carbonate from the Seaweed Lithothamnium calcareum" Solids 2, no. 2: 192-211. https://doi.org/10.3390/solids2020013

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