• Title/Summary/Keyword: mineralogical

Search Result 1,735, Processing Time 0.026 seconds

Geochemical and Mineralogical Characterization of Arsenic-Contaminated Soil at Chonam Gold Mine, Gwangyang (광양 초남 금 광산 비소오염 토양의 지화학적 및 광물학적 특성)

  • Kong, Mi-Hye;Kim, Yu-Mi;Roh, Yul
    • Economic and Environmental Geology
    • /
    • v.44 no.3
    • /
    • pp.203-215
    • /
    • 2011

  • Geochemical and mineralogical properties of a contamited soil should be taken into account to decide a remediation strategy for a given contaminant because development and optimization of soil remedial technologies are based on geochemical and mineralogical separation techniques. The objective of this study was to investigate the geochemical and mineralogical characteristics of arsenic-contaminated soils. The arsenic-contaminated soil samples were obtained from Chonam gold mine, Gwangyang, Chonnam, Particle size analysis, sequential extraction, and mineralogical analyses were used to characterize geochemical and mineralogical characteristics of the As-contaminated soils. Particle size analyses of the As-contaminated soils showed the soils contained 17-36% sand, 25-54% silt, 9-28% clay and the soil texture were sandy loam, loam, and silt loam. The soil pH ranged from 4.5 to 6.6. The amount of arsenic concentrations from the sequential soil leaching is mainly associated with iron oxides (1 to 75%) and residuals (12 to 91%). Major minerals of sand and silt fractions in the soils were feldspar, kaolinite, mica, and quartz and minor mineral of which is an iron oxide. Major minerals of clay fraction were composed of illite, kaolinite, quartz, and vermiculite. And minor minerals are iron oxide and rutile. The geochemical and mineralogical analyses indicated the arsenic is adsorbed or coprecipitated with iron oxides or phyllosilicate minerals. The results may provide understanding of geochemical and mineralogical characteristics for the site remediation of arsenic-contaminated soils.

  • https://doi.org/10.9719/EEG.2011.44.3.203 인용 PDF KSCI