scholarly journals Petrological and Mineralogical Characteristics of Matrix of Pumice in Ulleung Island

2011 ◽  
Vol 24 (3) ◽  
pp. 151-164 ◽  
Author(s):  
Ji-Hyeon Im ◽  
Chang-Oh Choo ◽  
Yun-Deuk Jang
Keyword(s):  
Ulleung Island ◽  
Mineralogical Characteristics

scholarly journals Penicillium ulleungdoense sp. nov. from Ulleung Island in Korea

Mycobiology ◽  
2020 ◽  
pp. 1-9
Author(s):  
Doo-Ho Choi ◽  
Young-Hyun You ◽  
In-Seon Lee ◽  
Seung-Bum Hong ◽  
Tea-Yeol Jung ◽  
...  
Keyword(s):  
Ulleung Island

scholarly journals Mineralogical and Geochemical Characterization of Gold Mining Tailings and Their Potential to Generate Acid Mine Drainage (Minas Gerais, Brazil)

Minerals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 39
Author(s):  
Mariana Lemos ◽  
Teresa Valente ◽  
Paula Marinho Reis ◽  
Rita Fonseca ◽  
Itamar Delbem ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Minas Gerais ◽  
Acid Mine ◽  
Fine Grain ◽  
Mineralogical Characteristics ◽  
Tailing Dams ◽  
The One ◽  
And Control

For more than 30 years, sulfide gold ores were treated in metallurgic plants located in Nova Lima, Minas Gerais, Brazil, and accumulated in the Cocoruto tailings dam. Both flotation and leaching tailings from a deactivated circuit, as well as roasted and leaching tailings from an ongoing plant, were studied for their acid mine drainage potential and elements’ mobility. Detailed characterization of both tailings types indicates the presence of fine-grain size material hosting substantial amounts of sulfides that exhibit distinct geochemical and mineralogical characteristics. The samples from the ongoing plant show high grades of Fe in the form of oxides, cyanide, and sulfates. Differently, samples from the old circuit shave higher average concentrations of Al (0.88%), Ca (2.4%), Mg (0.96%), and Mn (0.17%), present as silicates and carbonates. These samples also show relics of preserved sulfides, such as pyrite and pyrrhotite. Concentrations of Zn, Cu, Au, and As are higher in the tailings of the ongoing circuit, while Cr and Hg stand out in the tailings of the deactivated circuit. Although the obtained results show that the sulfide wastes do not tend to generate acid mine drainage, leaching tests indicate the possibility of mobilization of toxic elements, namely As and Mn in the old circuit, and Sb, As, Fe, Ni, and Se in the tailings of the plant that still works. This work highlights the need for proper management and control of tailing dams even in alkaline drainage environments such as the one of the Cocoruto dam. Furthermore, strong knowledge of the tailings’ dynamics in terms of geochemistry and mineralogy would be pivotal to support long-term decisions on wastes management and disposal.

Mineralogical characteristics of soil dust from source regions in northern China

Particuology ◽  
2009 ◽  
Vol 7 (6) ◽  
pp. 507-512 ◽  
Author(s):  
Zhenxing Shen ◽  
Sandrine Caquineau ◽  
Junji Cao ◽  
Xiaoye Zhang ◽  
Yuemei Han ◽  
...  
Keyword(s):  
Northern China ◽  
Soil Dust ◽  
Source Regions ◽  
Mineralogical Characteristics

Physical, Chemical, and Mineralogical Characteristics of Soils from Volcanic Ash in Northern Idaho: I. Morphology and Genesis

1979 ◽  
Vol 43 (3) ◽  
pp. 541-547 ◽  
Author(s):  
M. A. Fosberg ◽  
A. L. Falen ◽  
J. P. Jones ◽  
B. B. Singh
Keyword(s):  
Volcanic Ash ◽  
Physical Chemical ◽  
Mineralogical Characteristics ◽  
Northern Idaho

scholarly journals Breeding biology of two wagtail subspecies on Ulleung Island, Korea: Amur Wagtails, Motacilla alba leucopsis and Black-backed Wagtails, M. a. lugens

2018 ◽  
Vol 22 (4) ◽  
pp. 259-266
Author(s):  
Ji-Young Lee ◽  
Jin-Young Park ◽  
Incheol Kim ◽  
Woo-Yuel Kim ◽  
Ha-Cheol Sung
Keyword(s):  
Breeding Biology ◽  
Ulleung Island ◽  
Motacilla Alba

scholarly journals Synthesis and characterization of nanostructured ceramics powders for biomedical applications

2007 ◽  
Vol 12 (4) ◽  
pp. 574-582 ◽  
Author(s):  
Nelson Heriberto de Almeida Camargo ◽  
O. J. Bellini ◽  
Enori Gemelli ◽  
M. Tomiyama
Keyword(s):  
Calcium Phosphate ◽  
Nanostructured Materials ◽  
Biomedical Applications ◽  
Calcium Phosphates ◽  
Morphological Characterization ◽  
Synthesis And Characterization ◽  
Powder Synthesis ◽  
Mineralogical Characteristics ◽  
Nanostructured Ceramics

Nanostructured materials have been largely studied in the last few years because they have a great potential to applications in different fields like physics, chemistry, biology, mechanic and medicine. Synthesis and characterization of nanostructured materials is a subject of great interest involving science, market, politicians, government and society. The nanostructured materials are in demand in biomedical area, mainly the bioceramics composed of calcium phosphates (Ca/P), which have an excellent biocompatibility and mineralogical characteristics similar to those of bones. The aim of this work was to optimize the method of powder synthesis of nanostructured calcium phosphate and of nanocomposites composed of calcium phosphate//SiO2n, containing 5, 10 and 15% (in volume) of nanometric silica (SiO2n). The results are expressed according to the method of synthesis, mineralogical and morphological characterization, and thermal behavior for the different compositions of the nanostructured powder synthesized.

Mineralogical Characteristics of Exsolved Spinel in the Panzhihua V‐Ti Magnetite Deposit, Sichuan: Implications for the Mineralization Process

2018 ◽  
Vol 92 (5) ◽  
pp. 1784-1797 ◽  
Author(s):  
Zhibin ZHANG ◽  
Fei HUANG ◽  
Miaomiao XING ◽  
Quan WAN ◽  
Wenyuan GAO ◽  
...  
Keyword(s):  
Mineralization Process ◽  
Mineralogical Characteristics
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