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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Zeolite-SPION Nanocomposite for Ammonium and Heavy Metals Removal from Wastewater

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Author(s):
Helton P. Nogueira [1] ; Sergio H. Toma [2] ; Alceu T. Silveira Jr. [3] ; Koiti Araki [4]
Total Authors: 4
Affiliation:
[1] Universidade de São Paulo. Instituto de Química. Departamento de Química Fundamental - Brasil
[2] Universidade de São Paulo. Instituto de Química. Departamento de Química Fundamental - Brasil
[3] Universidade de São Paulo. Instituto de Química. Departamento de Química Fundamental - Brasil
[4] Universidade de São Paulo. Instituto de Química. Departamento de Química Fundamental - Brasil
Total Affiliations: 4
Document type: Journal article
Source: Journal of the Brazilian Chemical Society; v. 31, n. 11, p. 2342-2350, 2020-10-30.
Abstract

Minimizing the emission of industrial effluents and realizing the recovery/extraction of key elements such as the rare earths from low concentration solutions, or during water decontamination processes, are some of the biggest challenges of modern society. Accordingly, the preparation and characterization of a low cost recyclable and reusable superparamagnetic iron oxide nanoparticles (SPION)/zeolite nanocomposite (Zmag) is described, and the possibility of their use for removal of heavy metals and ammonium/ammonia is discussed, generating water whose quality is in compliance with the more strict modern environmental laws. Such materials are suitable for realization of a more efficient dispersion method for adsorption in combination with magnetically aided concentration/separation processes for removal of contaminants. In fact, Zmag was shown to efficiently remove PbII and HgII, as well as NH4+ from water, generating effluents that can be directly disposed in water bodies according to the current environmental law requirements, as stated by EPA (North America Environmental Protection Agency). That nanocomposite material has a competitive production cost and allowed a cutback in the nitrogen (NH3) content from 300 mg L-1 (diluted slurry source) to less than 36 mg L-1. Furthermore, Zmag demonstrated high capacity to concentrate and recover in a cyclic way LaIII. (AU)

FAPESP's process: 18/21489-1 - Supramolecular nanotechnology: design, materials and devices
Grantee:Henrique Eisi Toma
Support Opportunities: Research Projects - Thematic Grants