About: Uniform particles formed by hydrolysis of acid mine drainage with urea

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	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. 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. (en)
Title	Uniform particles formed by hydrolysis of acid mine drainage with urea Uniform particles formed by hydrolysis of acid mine drainage with urea (en)
skos:prefLabel	Uniform particles formed by hydrolysis of acid mine drainage with urea Uniform particles formed by hydrolysis of acid mine drainage with urea (en)
skos:notation	RIV/61388980:_____/11:00369860!RIV12-AV0-61388980
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(LC523), P(MEB0810136), Z(AV0Z40320502)
http://linked.open...iv/cisloPeriodika	1-2
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Boháček, Jaroslav Šubrt, Jan Lukáč, Jozef
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav anorganické chemie AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	236822
http://linked.open...ai/riv/idVysledku	RIV/61388980:_____/11:00369860
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	acid mine drainage; urea hydrolysis; morphology; particles; surface area (en)
http://linked.open.../riv/klicoveSlovo	acid mine drainage surface area urea hydrolysis morphology particles
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[64B4A568F095]
http://linked.open...i/riv/nazevZdroje	Hydrometallurgy
http://linked.open...in/vavai/riv/obor	CA
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Perspective inorganic materials Structure, properties and use of mine drainage waters and sediments
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	106
http://linked.open...iv/tvurceVysledku	Boháček, Jaroslav Šubrt, Jan Máša, B. Gánovská, Z. Lukáč, Jozef Michalková, E.
http://linked.open...ain/vavai/riv/wos	000287952600003
http://linked.open...n/vavai/riv/zamer	Design, syntéza a charakterizace klastrů, kompozitů, komplexů a dalších sloučenin na bázi anorganických látek; mechanismy a kinetika jejich interakcí
issn	0304-386X
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.hydromet.2010.11.012

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