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Uniform particles formed by hydrolysis of acid mine drainage with urea
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SYSNO ASEP 0369860 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Uniform particles formed by hydrolysis of acid mine drainage with urea Author(s) Šubrt, Jan (UACH-T) SAI, RID
Michalková, E. (SK)
Boháček, Jaroslav (UACH-T) SAI
Lukáč, Jozef (UACH-T)
Gánovská, Z. (SK)
Máša, B. (SK)Source Title Hydrometallurgy. - : Elsevier - ISSN 0304-386X
Roč. 106, 1-2 (2011), s. 12-18Number of pages 7 s. Language eng - English Country NL - Netherlands Keywords acid mine drainage ; urea hydrolysis ; morphology ; particles ; surface area Subject RIV CA - Inorganic Chemistry R&D Projects LC523 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) MEB0810136 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z40320502 - UACH-T (2005-2011) UT WOS 000287952600003 DOI 10.1016/j.hydromet.2010.11.012 Annotation The study describes a new way of treating of acid mine drainage (AMD) waters containing sulphate of Fe(+3) and Al(+3) as dominant components using homogenous thermal hydrolysis with urea. The model solution and the acid mine drainage solution were kept with urea at one of the selected temperatures (60 degrees C, 80 degrees C and 95 degrees C) in thermostatic bath. X-ray powder diffraction spectra identified four main phases in the hydrolysis products, namely: goethite, schwertmannite. ferrihydrite and jarosite. No crystalline phases of aluminum were detected. Depending on the precipitation conditions, the prepared samples consist of spherical aggregates of nanocrystals of various modifications of hydrated iron oxides. The specific surface area results show that with increasing content of Al(3+), the specific surface area in the final product decreases. The results reveal that by homogenous hydrolysis of acid mine drainage with urea, it is possible to prepare easily filterable relatively pure oxide precipitates with a high degree of separation of Fe and Al. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2012
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