Synthesis of novel hierarchical micro/nanostructures AlOOH/AlFe and their application for As(V) removal

doi:10.1007/s11356-021-15612-9

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Synthesis of novel hierarchical micro/nanostructures AlOOH/AlFe and their application for As(V) removal	2 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1007/s11356-021-15612-9

#малотоксичные иерархические микро/наноструктуры

#мышьяк

#биметаллические наночастицы

#фазовый состав

Title: Synthesis of novel hierarchical micro/nanostructures AlOOH/AlFe and their application for As(V) removal
Creator: Svarovskaya, Natalya V.
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Bakina, Olga V.
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Glazkova, Elena A.
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Rodkevich, Nikolay G.
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Lerner, Marat I.
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Vornakova, Ekaterina A.
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Chzhou, Valeria
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Naumova, Lyudmila B.
Date: 2022
DOI: 10.1007/s11356-021-15612-9
Description: Hierarchical micro/nanostructured composites, which contain iron and/or its (hydr)oxides, demonstrate high rate and capacity of arsenic adsorption. The main objective of this paper is the use of novel low toxicity AlOOH/AlFe hierarchical micro/nanostructures for arsenic removal. AlOOH/AlFe composite was obtained by simple water oxidation in mild conditions using AlFe bimetallic nanopowder as a precursor. AlFe bimetallic nanopowder was produced by electrical explosive of two twisted wires in argon atmosphere. The productivity of the electrical explosion assembly was 50 g/h, with the consumption of the electrical energy was 75 kW·h/kg. AlFe bimetallic nanoparticles were chemically active and interacted with water at 60 °C. This nanocomposite AlOOH/AlFe is low cost and adsorbs more than 200 mg/g As(V) from its aqueous solution. AlOOH/AlFe composite has flower-like morphology and specific surface area 247.1 m2/g. The phase composition of nanostructures is present AlOOH boehmite and AlFe intermetallic compound. AlOOH/AlFe composite was not previously used for this. The flower-shape AlOOH morphology not only facilitated deliverability, but increased the As(V) sorption capacity by up to 200 mg/g. The adsorption kinetics has been found to be described by a pseudo-second-order equation of Lagergren and Weber-Morris models while the experimental adsorption isotherm is closest to the Freundlich model. This indicates the energy heterogeneity of the adsorbent surface and multilayer adsorption. The use of non-toxic nanostructures opens up new options to treat water affected by arsenic pollution.