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Characterization of Mineralogical and Physicochemical Properties of Soils Contaminated with Metals at Gahak Mine
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 Title & Authors
Characterization of Mineralogical and Physicochemical Properties of Soils Contaminated with Metals at Gahak Mine
Lee, Choong Hyun; Lee, Seon Yong; Park, Chan Oh; Kim, Jong Won; Lee, Sang Hwan; Park, Mi Jeong; Jung, Moon Young; Lee, Young Jae;
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 Abstract
Soil samples collected in an area of Gahak Mine were investigated for the characterization of mineralogical and physicochemical properties of contaminants in soils. It is found that soils in the study area are contaminated by lead (Pb), copper (Cu), zinc (Zn), cadmium (Cd), in which their concentrations are 595.3 mg/kg, 184.9 mg/kg, 712.8 mg/kg, and 10.64 mg/kg, respectively. All the concentrations exceed the concern criteria of Korean standard. Upon distribution patterns of metals identified by the sequential extraction procedure, our results show that more than 50% of metals are found as a residual type, and 30% are accounted for the association of Fe/Mn oxides. Interestingly, XRD results show that minium (Pb3O4) and cuprite (Cu2O) are identified in the soil samples, suggesting that the sources of the contaminants for Pb and Cu are these minerals. In SEM images, tens of µm of Pb oxides and Pb silicate-minerals are observed. We, therefore, note that the contamination of metals in the study area results from the direct influx and disturbance of tailings. Our findings indicate that the characterization of physicochemical and mineralogical properties of contaminated soils is a critical factor and plays an important role in optimizing recovery treatments of soils contaminated in mine development areas.
 Keywords
Mineralogical properties;Contaminant speciation;Tailings;heavy metals;Soil contamination;
 Language
Korean
 Cited by
1.
가학광산 주변 중금속 오염토양의 정화를 위한 역부선 최적화,김상효;안용현;이충현;이영재;박미정;이상환;정문영;

한국자원공학회지, 2015. vol.52. 6, pp.549-558 crossref(new window)
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