نتایج جستجو برای: ferrihydrite
تعداد نتایج: 542 فیلتر نتایج به سال:
Despite the ubiquity of ferrihydrite in natural sediments and its importance as an industrial sorbent, the nanocrystallinity of this iron oxyhydroxide has hampered accurate structure determination by traditional methods that rely on long-range order. We uncovered the atomic arrangement by real-space modeling of the pair distribution function (PDF) derived from direct Fourier transformation of t...
• Effects of carbonate and phosphate on ferrihydrite transformation were investigated. Carbonate can override the retarding impact P transformation. promoted formation more crystalline rhombic hematite particles. Phosphate serve a different role in cycling nutrients & metals. In soils rhizospheres, iron (oxyhydr)oxides oxyanions like occur ubiquitously their interaction have important implicati...
Arsenic slows the structural ordering and transformation of As-bearing green rust formed from ferrihydrite under anoxic circum-neutral pH conditions.
Abstract Nanotechnology has been evolving in the past decades as an alternative to conventional fertilizers. Ferrihydrite nanoparticles that model available Fe pool of soils are proposed be used recover deficiency plants. Nevertheless, ferrihydrite aqueous suspensions known undergo slow transformation a mixture goethite and hematite, which may influence its biological availability. Several nano...
The formation and transformation of secondary minerals in areas affected by neutralized acid mine drainage (AMD) determine the behavior toxic elements. To better understand binding form elements minerals, we focused on distribution precipitates heavy metals AMD near a typical Cu-polymetallic deposit located central Tibet. Compared to background values, average metal (As, Cu, Co, Mo, Pb, Zn) con...
Texture and magnetic properties of aligned hexaferrite obtained from spark plasma sintering nanosized sixline-ferrihydrite platelets resulting in (BH)max = 33 kJ m−3.
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