Magnetic properties of biogenic selenium nanomaterials
نویسندگان
چکیده
Bioreduction of selenium oxyanions to elemental is ubiquitous; elucidating the properties this biogenic (BioSe) thus important understand its environmental fate. In study, magnetic nanospheres (BioSe-Nanospheres) and nanorods (BioSe-Nanorods) obtained via reduction selenium(IV) using anaerobic granular sludge taken from an upflow blanket (UASB) reactor treating paper pulp wastewater were investigated. The study indicated that BioSe nanomaterials have a strong paramagnetic contribution with some ferromagnetic component due incorporation Fe(III) (high-spin low-spin species) as by electron resonance (EPR). paramagnetism did not saturate up 50,000 Oe at 5 K, hysteresis curve showed coercivity 100 moment saturation around 10 emu. X-ray photoelectron spectroscopy (XPS) EPR evidenced presence in nanomaterial. Signals for Fe(II) observed neither nor XPS ruling out nanoparticles. being abundantly present likely got entrapped extracellular polymeric substances (EPS) coating nanomaterials. nanomaterial increases mobility may effect on phytoplankton growth environment. Furthermore, supported literature, there potential exploit drug delivery systems well space refrigeration.
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ژورنال
عنوان ژورنال: Environmental Science and Pollution Research
سال: 2021
ISSN: ['1614-7499', '0944-1344']
DOI: https://doi.org/10.1007/s11356-020-11683-2