Extraction of metals from natural waters: A neutron characterization of the nanostructured manganese-oxide-based adsorbents
2006 (English)In: Physica. B, Condensed matter, ISSN 0921-4526, Vol. 385, 493-495 p.Article in journal (Refereed) Published
A methodology has been developed for extraction of metals, i.e., lithium, gold and inorganic arsenic, from natural waters using nanostructured manganese-oxide-based adsorbents. The methods are extremely efficient, highly selective, recyclable, and environmentally benign. A key process to functionalize the Li-, Au- and As-adsorption relies on the protonation of nanoparticles of Mn-spinel, Mn2O3- and Bi-doped Mn2O3 adsorbents, respectively, so that proper exchange or redox reactions with the targeted metal ions or complexes become possible in spite of the very dilute contents in aqueous solutions. We have applied small-to-wide angle neutron diffraction and inelastic scattering to determine the fractal-like morphology of the nanocomposites, the mixed crystal phases therein and the atomic dynamics. In the case of the pure and hydrogenated Mn-spinel, the neutron data were compared with first-principles calculations of the phonon density of states and the local vibrations modes of adsorbed hydrogen atoms.
Place, publisher, year, edition, pages
2006. Vol. 385, 493-495 p.
manganese oxide adsorbents, gold recovery, lithium extraction, neutron scattering
IdentifiersURN: urn:nbn:se:uu:diva-151371DOI: 10.1016/j.physb.2006.05.227ISI: 000243096400144OAI: oai:DiVA.org:uu-151371DiVA: diva2:409673