Photos showing; (a) magnetite rich Buttala iron ore samples; (b) powdered iron ores and (c) the resulted powder of HNPs during the process

Contexts in source publication

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... grade polyethylene glycol 6000 (PEG), NaOH pellets (≥98%, anhydrous) and HCl (37%) were purchased from Sigma-Aldrich. Iron ore samples collected from the Buttala deposit were used as the iron precursor for the synthesis of HNPs. The samples were initially mineralogically and texturally investigated to obtain the un-weathered pure samples (Fig. 2a). Then the samples were cleaned using distilled water, dried and crushed. Finally, representative fractions of crushed samples were sieved to obtain particles less than 150 μm (Fig. 2b). These sieved fractions were used to study the chemical and mineralogical characteristics of the raw iron ores as well as to synthesis of ...

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... as the iron precursor for the synthesis of HNPs. The samples were initially mineralogically and texturally investigated to obtain the un-weathered pure samples (Fig. 2a). Then the samples were cleaned using distilled water, dried and crushed. Finally, representative fractions of crushed samples were sieved to obtain particles less than 150 μm (Fig. 2b). These sieved fractions were used to study the chemical and mineralogical characteristics of the raw iron ores as well as to synthesis of ...

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... of synthesized nanoparticles ( Panda et al., 2009;Díaz et al., 2016). At pH ~11.0, a dark colour HNP suspension was formed. After cooling to room temperature (28˚C 28˚C), the HNPs were centrifuged at 3000 rpm for 15 minutes. Then the supernatant was removed and HNPs crude was dried in an oven at 70 ºC for 2 hours to obtain a dry HNPs (Fig. ...

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... grade polyethylene glycol 6000 (PEG), NaOH pellets (≥98%, anhydrous) and HCl (37%) were purchased from Sigma-Aldrich. Iron ore samples collected from the Buttala deposit were used as the iron precursor for the synthesis of HNPs. The samples were initially mineralogically and texturally investigated to obtain the un-weathered pure samples (Fig. 2a). Then the samples were cleaned using distilled water, dried and crushed. Finally, representative fractions of crushed samples were sieved to obtain particles less than 150 μm (Fig. 2b). These sieved fractions were used to study the chemical and mineralogical characteristics of the raw iron ores as well as to synthesis of ...

Context 5

... as the iron precursor for the synthesis of HNPs. The samples were initially mineralogically and texturally investigated to obtain the un-weathered pure samples (Fig. 2a). Then the samples were cleaned using distilled water, dried and crushed. Finally, representative fractions of crushed samples were sieved to obtain particles less than 150 μm (Fig. 2b). These sieved fractions were used to study the chemical and mineralogical characteristics of the raw iron ores as well as to synthesis of ...

Context 6

... of synthesized nanoparticles ( Panda et al., 2009;Díaz et al., 2016). At pH ~11.0, a dark colour HNP suspension was formed. After cooling to room temperature (28˚C 28˚C), the HNPs were centrifuged at 3000 rpm for 15 minutes. Then the supernatant was removed and HNPs crude was dried in an oven at 70 ºC for 2 hours to obtain a dry HNPs (Fig. ...