Artikkelit kirjoittajalta Kalevi Pihlaja
Turpeen kemiasta ja turpeesta kemiallisena raaka-aineena.
English title: Peat chemistry and peat as a chemical raw material.
Tiivistelmä |
Näytä lisätiedot
|
Artikkeli PDF-muodossa |
Tekijä
Peat chemistry is an important field of research, both from the molecular and from the applications point of view. Peat consists of a wide variety of different organic components and groups of compounds with differing properties. For example, the so-called humic substances can bind to and form complexes with inorganic ions. The use of peat as a chemical raw material for many chemical products is technically possible. At the present, however, the cost of production from peat needs to be significantly lower than from more conventional sources (e.g. oil) in order to overcome the complications caused by its heterogeneity and high water content. Nevertheless, it can be expected that in the coming decades the value of peat not merely as an energy source but as a chemical raw material will be realized.
Keywords: Chemical refining, organic components, peat
-
Pihlaja,
Department of Chemistry, University of Turku, SF-20500 Turku, Finland
Sähköposti:
ei.tietoa@nn.oo
Maatumisen vaikutus rahka- ja saraturpeista orgaanisilla liuottimilla uuttautuvan aineksen koostumukseen.
English title: Effect of humification on the composition of the solvent-extractable matter in Sphagnum and Carex peats.
Tiivistelmä |
Näytä lisätiedot
|
Artikkeli PDF-muodossa |
Tekijät
Solvent-extractable matter of Sphagnum (S) and Carex (C) peats of different degrees of humification (S, H2-H8; C, H3-H8) were isolated, saponified and analyzed. The C peat material was found to contain more extract than the S peat (C, 9.3%; S, 5.9%, on average). In both peat series the extract content increased with increasing degree of humification. In both peats the unsaponifiable, non-volatile polymeric matter comprised the biggest part, nearly one half on average, of the saponified extracts, which also were analyzed for their lipid components and other volatile materials. These fractions accounted for over one third and nearly one fifth, respectively. The total amounts of all these three categories generally increased, as did those of the individual lipid groups, with increasing humification. However, the relative minimum of the polymers and the relative maximum of the analyzed lipid compounds were found in the samples of H4 in both peat series. Fatty and ω-hydroxy acids were the most abundant lipid groups, together accounting for 70-90% of the analyzed lipids. Sterols and 1-alkanols were clearly more abundant in the S peat. The relative amounts of the lipid groups did not show a distinct dependence on the degree of humification in either peat series. The individual lipid group compositions of both peat types were very similar although some exceptions were found.
Keywords: Carex , humification, peat lipids, Sphagnum
-
Lehtonen,
Department of Chemistry, University of Turku, SF-20500 Turku, Finland
Sähköposti:
ei.tietoa@nn.oo
- Ketola, Sähköposti: ei.tietoa@nn.oo
- Haihu, Sähköposti: ei.tietoa@nn.oo
- Pihlaja, Sähköposti: ei.tietoa@nn.oo
Turpeen biologi-sesti aktiivisista aineista ja niiden luonteesta.
English title: Biologically active substances in peat — is it possible to characterize them and their modes of action at the molecular level?
Tiivistelmä |
Näytä lisätiedot
|
Artikkeli PDF-muodossa |
Tekijä
A short review on biologically active substances in peat and their characterization is given. There is a clear need for further multidisciplinary research into use of peat as a chemical raw material. The material is based on a lecture presented at DGMT symposium "Operating Mechanisms of Peat Therapy" in Bad Alexandersbad, FRG, 1985.
Key words: peat therapy, biologically active substances, mode of action at the molecular level
-
Pihlaja,
Department of Chemistry, University of Turku, SF-20500 Turku, Finland
Sähköposti:
ei.tietoa@nn.oo
Click this link to register to Suo - Mires and peat.
Jos olet rekisteröitynyt käyttäjä, kirjaudu sisään tallentaaksesi valitsemasi artikkelit myöhempää käyttöä varten.
Valitsemasi artikkelit
Suo - Mires & Peat
