Mineralogical characterization related to physico-chemical conditions in the pyrite-rich tailings in Guryong Mine, Korea

Autor:	Yong Seon Zhang, Yungoo Song, Yeon Kyu Sonn, Yong-Hee Moon, Hi Soo Moon, Byung Keun Hyun
Rok vydání:	2013
Předmět:	Calcite Gypsum Schwertmannite Geochemistry Soil Science Mineralogy chemistry.chemical_element Plant Science engineering.material Tailings Sulfur chemistry.chemical_compound chemistry Jarosite engineering Pyrite Sulfate
Zdroj:	Soil Science and Plant Nutrition. 59:509-521
ISSN:	1747-0765 0038-0768
DOI:	10.1080/00380768.2013.773416
Popis:	The detailed characterization of mineralogical changes with depth in pyrite-rich tailings from an abandoned mine provides insight into the future geochemical progression of the tailings. Based on the pH and mineralogical characterization, the Guryong mine tailings can be divided into four zones: jarosite zone, iron (Fe)-sulfate zone, Fe-oxyhydroxide and gypsum-bearing pyrite zone, and calcite-bearing pyrite zone. The jarosite zone was approximately 50 cm deep from the surface and had secondary gypsum (CaSO4·2H2O) and jarosite [KFe3(SO4)2(OH)6]. The pH of the jarosite zone ranged from 2.3 to 4.0, and the ratio of total Fe to total sulfur (S) ranged from 0.7 to 4.3. These results show that the solid phase, schwertmannite or jarosite, is associated with the total sulfate (SO4) content. The Fe-sulfate zone had low pH values caused by strong pyrite oxidation and greatest amounts of the secondary minerals and acid-leachable heavy metals. The Fe-oxyhydroxide and gypsum-bearing pyrite zone reflects parti...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::85db4ea8eeb7ad6b6e4d296de16549bb https://doi.org/10.1080/00380768.2013.773416 Zobrazit plný text záznamu