Zobrazeno 1 - 10
of 208
pro vyhledávání: '"rare elements"'
Publikováno v:
International Journal of Applied Mathematics and Computer Science, Vol 34, Iss 3, Pp 439-451 (2024)
Besides clustering and classification, detection of atypical elements (outliers, rare elements) is one of the most fundamental problems in contemporary data analysis. However, contrary to clustering and classification, an atypical element detection t
Externí odkaz:
https://doaj.org/article/3ef77efaea3246be9c771963318d9334
Publikováno v:
Geography, Environment, Sustainability, Vol 16, Iss 4, Pp 180-192 (2024)
Studies on thermal power plant areas with respect to chemical composition of particulate matter deposited in snow cover are limited. This study aims to monitor (2014–2022) particulate load and trace elements associated with the particulate matter d
Externí odkaz:
https://doaj.org/article/7a7c8ec39a9f4c2480e4cceabd2f1f7c
Publikováno v:
Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 334, Iss 3, Pp 26-39 (2023)
The relevance of the research is caused by the possibility of using coal not only as energy fuel, but also as a source of valuable elements-impurities (Ge, Re, Ga, Nb, Zr, Hf, Y, Au, REE, etc.). This is especially true of toxic impurities, since a si
Externí odkaz:
https://doaj.org/article/87b6763dc7534b2cb4340f9aad5c06a4
Autor:
Alex da Silva de Freitas, Lara Luiza de Oliveira Pompermayer, Ana Dalva de Oliveira Santos, Marília Teresa Lima do Nascimento, Tatiana Dillenburg Saint'Pierre, Rachel Ann Hauser-Davis, José Antônio Baptista Neto, Estefan Monteiro da Fonseca
Publikováno v:
Journal of Trace Elements and Minerals, Vol 4, Iss , Pp 100068- (2023)
Background: This study aimed to evaluate the environmental quality of Padre Lagoon, an urban coastal lagoon in Southeastern Rio de Janeiro, Brazil, employing rare earth elements (REEs) as tracers. Aim: The present study aimed to quantify REEs content
Externí odkaz:
https://doaj.org/article/6f734156d38f43c796d08e15bae25795
Publikováno v:
Minerals, Vol 14, Iss 2, p 120 (2024)
The main objective of this manuscript is to collect, classify, and compile all available data about secondary mineral sources of REEs in the South-Eastern Europe (SEE). The material is generated from the extracting and processing sector, that might b
Externí odkaz:
https://doaj.org/article/4cec54b2e49f4c95a5d60b1024f31308
Publikováno v:
Shiyou shiyan dizhi, Vol 43, Iss 5, Pp 855-861 (2021)
Three types of rare earth elements, Pr, Yb and Sm, in shale gas well and fracturing fluid, which showed a low content and are environmentally friendly and chemically stable, formed complexes with ethylenediamine tetra-acetic acid and di-picolinic aci
Externí odkaz:
https://doaj.org/article/6d16690faf5649c19812999deb874b4c
Autor:
Sergey I. Arbuzov, Igor Yu. Chekryzhov, Sergey S. Ilenok, Bulat R. Soktoev, Elena E. Soboleva
Publikováno v:
Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 332, Iss 5, Pp 17-38 (2021)
The relevance of this research is conditioned by the need to develop predictive and prospecting criteria for identifying a strategically important type of germanium raw material – germanium-coal deposits. The main aim is to study the geochemical fe
Externí odkaz:
https://doaj.org/article/fcd8294438b54687a863df0d366fd2b3
Publikováno v:
Геодинамика и тектонофизика, Vol 13, Iss 2 (2022)
The ICP-MS determinations have been made on microelement content of ~650–640 Ma ultramafic lamprophyre-aillikite dikes and alkaline silicate rocks and carbonatites from the Bolshetagninsky ijolite-syenite massif, spatially overlapped in the norther
Externí odkaz:
https://doaj.org/article/f7c6d998958543d5bb44f51c8c219296
Publikováno v:
Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, Vol 48, Iss 4, Pp 64-84 (2020)
The composition of manganese micronodules from miopelagic clays and Ethmodiscus oozes of the central part of the Brazil Basin (station 1537, R/V Akademik Sergei Vavilov) is considered. Micronodules were recovered from >50 μm fraction of sediments fr
Externí odkaz:
https://doaj.org/article/eb56e76689d1480d826d88fc551863cf
Publikováno v:
پترولوژی, Vol 11, Iss 2, Pp 1-18 (2020)
The Fertile pegmatites are known as the most important source of strategic and rare elements. These coarse-grained granitic units are related to potentially granitic intrusions and the identification of the parental intrusion is the first step of the
Externí odkaz:
https://doaj.org/article/05cb9a1476e147eba228030a4c4d30e0