Published 2008
| Version v1
Journal article
Magnetic niobia as adsorbent of organic contaminants in aqueous medium: effect of temperature and pH
- 1. Universidade Federal de Lavras, MG (Brazil). Dept. de Quimica
Description
This work describes novel materials based on pure iron oxide and iron oxide/niobia composite to produce a magnetic adsorbent. These materials were prepared with synthetic iron oxide and characterized by powder XRD, SEM, FTIR, TPR and Moessbauer spectroscopy. Results showed that the main iron oxides formed were goethite (α FeOOH) and maghemite (γFe2O3) with small particle size. The iron oxide and iron oxide/niobia composite showed high adsorption ability for organic compounds. The positive enthalpy indicated an endothermic adsorption process suggesting physical adsorption. (author)
Availability note (English)
Available from http://www.scielo.br/pdf/qn/v31n3/a10v31n3.pdfAdditional details
Additional titles
- Original title (Portuguese)
- Niobia magnetica como adsorvente de contaminantes organicos em meio aquoso: efeito da temperatura e do pH
Identifiers
Publishing Information
- Journal Title
- Quimica Nova
- Journal Volume
- 31
- Journal Issue
- 3
- Journal Page Range
- p. 518-522
- ISSN
- 0100-4042
- CODEN
- QUNODK
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 39082658
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- ADSORPTION; FOURIER TRANSFORMATION; GOETHITE; INFRARED SPECTRA; IRON OXIDES; MOESSBAUER EFFECT; NIOBIUM; PH VALUE; SCANNING ELECTRON MICROSCOPY; TEMPERATURE DEPENDENCE; X-RAY DIFFRACTION
- Descriptors DEC
- CHALCOGENIDES; COHERENT SCATTERING; DIFFRACTION; ELECTRON MICROSCOPY; ELEMENTS; INTEGRAL TRANSFORMATIONS; IRON COMPOUNDS; METALS; MICROSCOPY; MINERALS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; REFRACTORY METALS; SCATTERING; SORPTION; SPECTRA; TRANSFORMATIONS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS
Optional Information
- Notes
- 22 refs., 7 figs., 2 tabs.