The humin structure of mucilage aggregates in the Adriatic and Tyrrhenian seas: hypothesis about the reasonable causes of mucilage formation |
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Authors: | Mauro Mecozzi Eva Pietrantonio Vito Di Noto Zsuzsa Ppai |
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Institution: | aIstituto Centrale per la Ricerca Scientifica e Tecnologica Applicata al Mare, via di Casalotti 300, 00166, Rome, Italy;bDipartimento di Chimica Inorganica Metallorganica ed Analitica, Università di Padova, via Loredan 4, 35151, Padua, Italy;cDepartment of Analytical Chemistry, University of Veszprém, PO Box 158, Veszprém, Hungary |
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Abstract: | Sixteen mucilages sampled in the Adriatic and Tyrrhenian seas during 1999–2001 were characterised using spectroscopic Fourier transform infrared spectroscopy (FTIR); colorimetric], chromatographic thin-layer chromatography (TLC)], and elemental analysis techniques. Most samples contained comparable fractions of organic and inorganic compounds, with the exception of a few samples where the inorganic fraction was greater than the organic fraction. Carbohydrates were important in the samples rich in organic matter, while carbonate and silica (quartz and biogenic silica) were the most important constituents of the inorganic fraction. Carbonate and silica were the only important constituents of the samples with a very low organic content.According to chemical analyses, mucilage aggregates show the typical structure of humin—the insoluble fraction of the humic substance. Classification of mucilage samples as humin-like compounds, together with a reexamination of the factors involved in the formation of organic aggregates in marine environment, has led to the formulation of a reasonable hypothesis for mucilage formation. |
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Keywords: | Mucilage Aggregates Humification Humin Adriatic Sea Tyrrhenian Sea |
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