Chemiluminescence imaging of the formation and photodegradation of humic acid derived from 5-hydroxy-1,4-naphthoquinone [juglone]

• Autorzy: Gorski Z. , Rolewski P. , Slawinska D. , Slawinski J.
• Języki publikacji: EN

Abstrakty

EN

A new model humic acid (HA) have been synthetized from 5-hydroxy-1,4-naphthoquinone (juglone, J), an allelopathic compound occuring in leaves, nut shells, exsudates of roots and barks of Juglans genera. Aqueous solutions of J were autooxidised at different pH 6-10 with mineral matrices: bentonite, glass and silica. The very slow autooxidation reaction was monitored by means of chemiluminescence (CL) imaging and kinetics supported by a highly sensitive CCD camera Molecular Light Imager. In the course of autooxidation that lasted three weeks, an extremely low-intensity of CL was detected The reaction liquid was further treated according to the IHSS protocol to isolate humic acid fractions. Elemental analysis, UV-VIS and FTIR absorption spectra as well as fluorescence excitation and emission spectra were measured to characterise this new HA.

Słowa kluczowe

EN

formation; new model; humic acid; photodegradation; 5-hydroxy-1,4-naphthoquinone; tree; Juglans regia; chemiluminescence imaging; Juglans; Juglans nigra

• Wydawca: -
• Czasopismo: Electronic Journal of Polish Agricultural Universities. Series Environmental Development
• Rocznik: 2004
• Tom: 07
• Numer: 2
• Opis fizyczny: http://www.ejpau.media.pl/series/volume7/issue2/environment/art-04.html

Twórcy

autor

Gorski Z.

• Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland

autor

Rolewski P.

autor

Slawinska D.

autor

Slawinski J.

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