Nanostructured Polymer Composites for Water Remediation

Akharame, Michael Ovbare; Oputu, Ogheneochuko; Pereao, Omoniyi; Fagbayigbo, Bamidele Oladapo; Razanamahandry, L.C.; Fatoki, Olalekan S

doi:10.1007/978-3-030-33745-2_10

Cited by 6 publications

(1 citation statement)

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“…The annealing phase reveals the crystallinity shapes of the precipitate. Several findings have been reported on the crystallinity materials which could be obtained after annealing the dried powders of precipitates from wastewater with chemical compounds [50][51][52]. The presence of all these elements in the annealed powders could explain the various shapes that were observed by the SEM images (Figure 5a,c,e).…”

Section: Precipitate Surface Morphologic and Elemental Compositionmentioning

confidence: 73%

Recovery of Iron Nanoparticles from Mine Wastewater Using Plant Extracts of Eucalyptus Globulus, Callistemon Viminalis and Persea Americana

Razanamahandry¹,

Nwanya

Akharame

et al. 2020

Minerals

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Mine wastewater (MW) is often rich in heavy metals that can have measurable effects on humans. The storage and treatment of MW remains a challenge for most mining companies. Iron (Fe) in MW was removed by using extracts from Eucalyptus globulus (EG); Callistemon viminalis (CV); and Persea americana (AS). Fe was removed from MW samples with an initial concentration of 5.53 mg Fe mL−1; 4.63 mg Fe mL−1 and 4.40 mg Fe mL−1 using EG leaves, CV flowers and AS seed extracts, respectively. Conditions of the MW decontamination were studied by varying the dosage of the plant extracts, the temperature of the medium and the contact time between the MW and the plant extracts. Undiluted plant extracts—which were mixed with the MW and heated at 45 °C for 3 h—gave the highest Fe-removal efficiency for CV (70%) and AS (53%) extracts, respectively. Similarly, EG extracts, albeit heated at 25 °C, showed a higher Fe-removal efficiency (85%) than the CV and AS extracts at low to high temperatures. The residual Fe concentration in the MW was 0.83 mg Fe mL−1, 1.39 mg Fe mL−1 and 2.07 mg Fe mL−1 for EG, CV and AS extracts, respectively. Residue solid-phase deposits from the precipitation reaction of the MW with the plant extracts were collected and analyzed. Fe was among the byproducts detected in the deposited material. The characterization of the annealed solid-phase deposits revealed Fe precipitates as maghemite-C (Fe2O3) and magnetite (FeFe2O4) nanoparticles. Therefore, the MW quality and form were improved, making it reusable for other purposes.

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Section: Precipitate Surface Morphologic and Elemental Compositionmentioning

confidence: 73%