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Uniform particles formed by hydrolysis of acid mine drainage with urea
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SYSNO ASEP 0369860 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Uniform particles formed by hydrolysis of acid mine drainage with urea Tvůrce(i) Šubrt, Jan (UACH-T) SAI, RID
Michalková, E. (SK)
Boháček, Jaroslav (UACH-T) SAI
Lukáč, Jozef (UACH-T)
Gánovská, Z. (SK)
Máša, B. (SK)Zdroj.dok. Hydrometallurgy. - : Elsevier - ISSN 0304-386X
Roč. 106, 1-2 (2011), s. 12-18Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova acid mine drainage ; urea hydrolysis ; morphology ; particles ; surface area Vědní obor RIV CA - Anorganická chemie CEP LC523 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy MEB0810136 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z40320502 - UACH-T (2005-2011) UT WOS 000287952600003 DOI 10.1016/j.hydromet.2010.11.012 Anotace 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. Pracoviště Ústav anorganické chemie Kontakt Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Rok sběru 2012
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