Synthesis and Characterization of Nano Fe and Mn (hydr)oxides to Be Used as Natural Sorbents and Micronutrient Fertilizers

Fe and Mn (hydr)oxides are widely used as contaminant sorbents in water/wastewater systems but their potential use micronutrient fertilizers is still poorly known. In this research, four nano-metal (amorphous oxide (AMO), Fe-Mn binary (FMBO), two-line ferrihydrite (2L-Fh) goethite) were successfully synthesized completely characterized (infrared Mössbauer spectroscopy, X-ray diffraction particle size, specific surface area, point of zero charge). AMO, FMBO 2L-Fh introduced to interact with AgNO3 (20.0 µM) TlNO3 (100.0 diluted solutions for three days check capability Ag+ Tl+ adsorbents. AMO (4% w/w) tested nanofertilizers by arranging a hydroponic bioassay 35 on white lupin culture Mn-hyperaccumulator plant model. structure was identified an amorphous mixture oxides while dopped birnessite. Both materials efficient extracting although large concentration released from the solutions. promoted nutrition plants. Synthetic iron chelate (Fe-EDDHA), present nutrient dissolution, could be adsorbed onto producing accumulation roots increasing uptake rate without toxicity symptoms. Therefore, not only demonstrated efficiency adsorbents, also displayed they would promising nanomaterials fertilizers.