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Wyszukujesz frazę "chemical elements" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Iron Metallurgy Slags as a Potential Source of Critical Elements - Nb, Ta and REE
Autorzy:
Kasina, Monika
Michalik, Marek
Powiązania:
https://bibliotekanauki.pl/articles/127566.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
metallurgical slags
chemical composition
critical elements
Nb
Ta
REE
Opis:
The recovery of valuable metals from metallurgical slag disposals is a promising option to protect natural resources, limited due to technology development and increased consumption. The Ad-hoc Working Group on Defining Critical Raw Materials within the Raw Materials Supply Group has proposed a list of critical elements which have the greatest economic importance and meet the requirements of sustainable development in Europe. The goal of this study was to examine steelmaking- and blast-furnace slags from metallurgical processes to determine concentrations of elements of the greatest criticality for Poland, e.g. Nb, Ta and REE, and to discuss the viability of their recovery. Slag analyses indicate enrichment of REE relative to UCC, NASC and average chondrite compositions in blast-furnace slags and Nb and Ta in steelmaking slags. To make recovery of these critical elements reasonable and profitable, it is recommended that they be recovered together with other useful raw materials.
Źródło:
Mineralogia; 2016, 47, 1/4; 15-28
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralogy, chemical composition and leachability of ash from biomass combustion and biomass–coal co-combustion
Autorzy:
Wilczyńska-Michalik, Wanda
Gasek, Renata
Michalik, Marek
Dańko, Janusz
Plaskota, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/127639.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
biomass ash
mineral composition
chemical composition
leachability
biomass combustion and co-combustion
hazardous elements
Opis:
Ash samples from biomass combustion or co-combustion with coal were analysed. The aim of this study of ash was to determine its mineral and chemical composition, and the chemical composition of solutions obtained during one-step water extraction. Besides the chemical analysis, X-ray diffraction (XRD) and scanning electron microscopy coupled with energy dispersive spectrometry (SEM-EDS) were applied. The mineral and chemical composition of ash samples differ strongly. The content of heavy metals in the ash is generally low, but in some samples the limits of the content of some elements determined for fertilizers or soil amendments are exceeded. The relatively poor correlation between the concentration in leachate and bulk content in ash indicates that numerous elements are present in different forms in the studied samples. The results indicate that the potential use of biomass ash, or ash from biomass–coal co-combustion, requires complex studies that explore ash and leachates.
Źródło:
Mineralogia; 2018, 49, 1/4; 67-97
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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