Abstract
Recent discovery of humic acid (HA) in the free-living, brown algaPilayella littoralis has prompted a search for HA in other live plants. Marine algaeCodium fragile andMonostoma oxyspermum (greens),Chondrus crispus,Palmaria palmata andPolysiphonia lanosa (reds),Ascophyllum nodosum, Fucus vesiculosus andLaminaria saccharina (browns) andZostera marina (marine angiosperm) were investigated for their HA content. Only the brown algae and the marine angiosperm contained HA, which was extracted by a standard procedure augmented with necessary removal of alginic acid (where applicable). The isolated products were identified as HA by comparison of their analytical data, uv-visible, FTIR,1H NMR spectra and morphologies with those of authentic HA isolated from municipal compost.
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Radwan, A., Davies, G., Fataftah, A. et al. Isolation of humic acid from the brown algaeAscophyllum nodosum, Fucus vesiculosus, Laminaria saccharina and the marine angiospermZostera marina . J Appl Phycol 8, 553–562 (1996). https://doi.org/10.1007/BF02186335
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DOI: https://doi.org/10.1007/BF02186335