Электронный каталог

Статья

Slavov, L.
Leptothrix Biomaterial: Investigation on a Product with Potential Applications as a Natural Absorbent Material for Heavy Metals / L.Slavov, D.M.Mirzayeva, E.Popov, S.P.Kaplina, M.V.Gustova, [a.o.]. – Text : electronic // Inorganic Chemistry Communications. – 2025. – Vol. 177. – P. 114350. – URL: https://doi.org/10.1016/j.inoche.2025.114350. – Bibliogr.: 96.

Abounded, homogenous, and uniform tubular structures with biogenic origin, obtained in a simple procedure involving prolonged storage time of natural biomass, are investigated. The tubular structures reach up to 60 μm in length and a diameter of around a micron − typical features of Leptothrix sp. activity. Energy-dispersive X-ray fluorescence spectrometry (XRF) unveils that iron is the dominant element in the material, and energy-dispersive X-ray spectroscopy (EDS) shows that the tubules contain 6.58 at.% elemental iron. The analysis of the XRD data obtained shows no sign of any iron oxides and (oxy)hydroxides nor ferrihydrite. During the Raman probing, it was established that laser power of 0.6 mW for 1 min leads to a complete transformation of the material to well-crystallized hematite (α-Fe2O3). The local overheating and the subsequent chemical transformation resulting from the higher laser power allow part of the elemental iron content in the biomass to be confirmed as belonging to the tubular structures themselves. Raman measurements involving altering laser power on exact locations unveil the path of transformation to hematite and confirm good uniformity of the obtained material. The lack of iron oxides and (oxy)hydroxides encrustation on the tubular structures is possibly due to the combined effect of sampling time (late autumn) and the lack of natural dynamic conditions in the prolonged storage time of the biomass. During Gamma spectrometry measurements, lines of short-lived radioactive isotopes (&sup(208)Tl and &sup(214)Bi) were detected, possibly sorbed by the material



Спец.(статьи,препринты) = 28.08 - Экология$
Спец.(статьи,препринты) = С 332.8 - Синхротронное излучение. Лазеры на свободных электронах. Получение и использование рентгеновских лучей
Спец.(статьи,препринты) = С 350 - Приложения методов ядерной физики в смежных областях
ОИЯИ = ОИЯИ (JINR)2025