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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Economic and Environmental Geology
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Journal DOI :
The Korean Society of Economic and Environmental Geology
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Volume & Issues
Volume 46, Issue 6 - Dec 2013
Volume 46, Issue 5 - Oct 2013
Volume 46, Issue 4 - Aug 2013
Volume 46, Issue 3 - Jun 2013
Volume 46, Issue 2 - Apr 2013
Volume 46, Issue 1 - Feb 2013
Selecting the target year
The Possibility of Gold Recovery from the Iron-Hydroxide in the Acid Mine Drainage by Lead-Fire Assay
Cho, Kang-Hee ; Kim, Bong-Ju ; Kim, Jin-Hyung ; Choi, Nag-Choul ; Park, Cheon-Young ;
Economic and Environmental Geology, volume 46, issue 6, 2013, Pages 477~484
DOI : 10.9719/EEG.2013.46.6.477
In order to recover gold from iron-hydroxide in acid mine drainage, a lead-fire assay has been used. Acid mine drainage is generated from mining waste rocks, and iron-hydroxide precipitates from acid mine drainage, which severely contaminates the area surrounding the mine. Iron-hydroxide samples contain on average 520.29 mg/kg of Fe, 4,414.62 mg/kg sulfur, and 16.19 mg/kg Au. In an XRD analysis, quartz and goethite were observed along with the iron-hydroxide. Using a lead-fire assay, the recovery of pure gold was on average 0.174 g/ton from the iron-hydroxide, whereas the gold not recovered in the process was on average 1.37 mg/kg. This unrecovered gold was lost to the glass slag due to the galena and lead formation. The galena and lead in the glass slag was identified through XRD.
Baseline Survey Seismic Attribute Analysis for CO
Monitoring on the Aquistore CCS Project, Canada
Cheong, Snons ; Kim, Byoung-Yeop ; Bae, Jaeyu ;
Economic and Environmental Geology, volume 46, issue 6, 2013, Pages 485~494
DOI : 10.9719/EEG.2013.46.6.485
Monitoring, Mitigation and Verification (MMV) is the essential part in the Carbon Capture and Storage (CCS) project in order to assure the storage permanence economically and environmentally. In large-scale CCS projects in the world, the seismic time-lapse survey is a key technology for monitoring the behavior of injected
. In this study, we developed a basic process procedure for 3-D seismic baseline data from the Aquistore project, Estevan, Canada. Major target formations of Aquistore CCS project are the Winnipeg and the Deadwood sandstone formations located between 1,800 and 1,900 ms in traveltime. The analysis of trace energy and similarity attributes of seismic data followed by spectral decomposition are carried out for the characterization of
injection zone. High trace energies are concentrated in the northern part of the survey area at 1,800 ms and in the southern part at 1,850 ms in traveltime. The sandstone dominant regions are well recognized with high reflectivity by the trace energy analysis. Similarity attributes show two structural discontinuities trending the NW-SE direction at the target depth. Spectral decomposition of 5, 20 and 40 Hz frequency contents discriminated the successive E-W depositional events at the center of the research area. Additional noise rejection and stratigraphic interpretation on the baseline data followed by applying appropriate imaging technique will be helpful to investigate the differences between baseline data and multi-vintage monitor data.
Applications of Isotope Ratio Infrared Spectroscopy (IRIS) to Analysis of Stable Isotopic Compositions of Liquid Water
Jung, Youn-Young ; Koh, Dong-Chan ; Lee, Jeonghoon ; Ko, Kyung-Seok ;
Economic and Environmental Geology, volume 46, issue 6, 2013, Pages 495~508
DOI : 10.9719/EEG.2013.46.6.495
Recently, stable isotopes (
) of water are increasingly analyzed using laser-based technologies. These methods have advantages over Isotope Ratio Mass Spectrometry (IRMS) in that they can be used for in-situ measurements and require much less maintenance and preparation work. Two types of laser-based methods are currently available, which have different analytical principles; OA-ICOS (off-axis integrated cavity output spectroscopy) and WS-CRDS (wavelength-scanned cavity ring-down spectroscopy). In the WS-CRDS instrument, water is vaporized at controlled environment and transferred to an optical cavity by nitrogen carrier gas, and stable isotopic compositions of water vapor are measured using the degree of absorbance of specific wavelengths and the ratios of attenuation time of the laser intensity with the sensitivity of ppb to tens of ppt level. In this study, we introduce the principle of the WS-CRDS technology and the performance results including stability and comparisons with Isotope Ratio Mass Spectrometry (IRMS) and suggest possible applications of various topics in isotope hydrology.
A Study on Removal of Heavy Metals (Cu, Zn, and Pb) from Contaminated Soil by Soil Washing
Kim, Myoung-Jin ;
Economic and Environmental Geology, volume 46, issue 6, 2013, Pages 509~520
DOI : 10.9719/EEG.2013.46.6.509
In this study, heavy metals are removed by soil washing from soils contaminated with Cu, Zn, and Pb, whose maximum concentrations are up to 3350, 1220, and 2240 mg/kg, respectively. Through various soil washing experiments, the optimum conditions, including type and concentration of washing reagent, washing time, mixing ratio of soil and washing reagent, and stirring speed, are derived for effective removal of the heavy metals. It is found that the most effective washing reagent and its concentration are hydrochloric acid and 50 mM, respectively. The most suitable washing time is 30 minutes and the optimal mixing ratio of soil and washing reagent is 1:30 (g/mL). The removal efficiency, on the other hand, is not affected by stirring speed. The removal efficiencies of the heavy metals decrease when washing reagent is reused. Furthermore, the heavy metals are readsorbed onto soil in case of consecutive reuse of washing reagent.
Removal of Aqueous Arsenic Via Adsorption onto Si Slag
Kim, Seong Hee ; Seol, Jeong Woo ; Lee, Woo Chun ; Kim, Soon-Oh ;
Economic and Environmental Geology, volume 46, issue 6, 2013, Pages 521~533
DOI : 10.9719/EEG.2013.46.6.521
This study was initiated to evaluate the applicability of Si slag as an adsorbent via investigation of the main properties of Si slag as an adsorbent aw well as characterization of adsorption features between aqueous arsenic and Si slag. The specific surface area of Si slag was measured to be 6.71
which seems to be slightly higher than those of other slags, but relatively lower than those of iron (oxyhydr)oxides extensively used for arsenic controlling processes. The point of zero salt effect (PZSE) of Si slag determined by potentiometric titration appeared to be comparatively high (7.3), indicating the Si slag may be favorably used for adsorption of arsenic which predominantly exists as an oxy-anions. The results of adsorption isotherm indicate that regardless of arsenic species, Langmuir-type isotherm is the most suitable to simulate the adsorption of arsenic onto Si slag. With regard to pH-dependence of arsenic adsorption, the adsorption maxima of arsenite was centered at pH 7, and the adsorption was remarkably decreased in the other pH conditions. In the case of arsenate, on the other hand, the adsorption was highest at the lowest pH (4.0) and then gradually decreased with the increase of pH. Based on the results of kinetic experiments, it is likely that the adsorption of arsenite approached equilibrium within 2 hr, but it took about 8 hr for arsenate adsorption to be equilibrated. In addition, the Pseudo second order was evaluated to be most consistent with the empirical data of arsenic adsorption onto Si slag in this study. Under identical conditions, the affinity of arsenate onto Si slag was estimated to be nearly 6 times higher than that of arsenite.
Influence of Sulfate on the Early Hydration in the Solidification of Lime-tailings
Lee, Hyun-Cheol ; Min, Kyoung-Won ; Yoo, Hwan-Geun ;
Economic and Environmental Geology, volume 46, issue 6, 2013, Pages 535~544
DOI : 10.9719/EEG.2013.46.6.535
Influence of sulfate on the early hydration in the solidification treatment of abandoned mine tailings was characterized. Solidified specimens using hydrated lime as a binder were prepared with various amounts of added
and different curing days. Unconfined compressive strength measurement, heavy metal leaching test, XRD analysis were performed after 7-, 14- and 28-days curing. According to curing days strength of solidified specimens using only distilled water increased but those with addition of
decreased. External cracks of specimens developed definitely with increasing
concentration and curing days. Concentrations of Cu, Cd, Zn, and As in the leached solutions from solidified specimens decreased significantly but Pb was leached readily in cases of hydrated lime dosage more than 10 wt%. Gypsum and
were identified in the cracked solidified specimens by XRD analysis, and pillar-shaped crystals of SEM image were identified as gypsum in reference with EDS analysis. Crystallization of sulfate in the process of lime-tailing solidification caused cracking, which should be supplemented for solidification treatment of highly sulfur-contained tailing.
Field Applications on Groundwater Management Scheme of Subwatershed Unit in Hampyeong-Gun
Jung, Chan Duck ; Song, In sung ;
Economic and Environmental Geology, volume 46, issue 6, 2013, Pages 545~559
DOI : 10.9719/EEG.2013.46.6.545
Until now, research achievements of groundwater such as groundwater to depth distribution, usage, the available amount of development, water quality have been written in the watershed units(
). However, complex topography and geology, and the rivers of our country does not fit. And a clear management standards have not been able to present measures in groundwater quantity, water quality management such as rainfall, groundwater, utilization, water quality, pollution, etc. Therefore, in this study, the classification criterion of subwatershed unit(
), which is suitable for topography and geology of Korea, for rainfall-rating, groundwater level-rating, groundwater pollution-rating, groundwater quality-rating presented and proved its efficiency by applying in Hampyeong-Gun area.
Copper in Peru: Present Status and Future Challenge
Acosta, Jorge ; Bustamante, Alberto ; Cardozo, Miguel ; Heo, Chul-Ho ; Kim, Eui-Jun ;
Economic and Environmental Geology, volume 46, issue 6, 2013, Pages 561~568
DOI : 10.9719/EEG.2013.46.6.561
The copper mineralization in Peru is intimately associated with porphyry Cu deposits and subdivides into three porphyry Cu belt as Paleocene, Eocene-Oligocene, and Miocene. Up to now, the total copper production from them reach 28 Mt Cu. The total copper production from the Paleocene Cu belt, including Toquepala, Cuajone, and Cerro Verde, accounts for approximately 57% of total copper production from Peru. But focusing mineral exploration on middle southern (Eocene-Oligocene) and northwestern part (Miocene) of Peru results in new discoveries, including La Granja, El Galeno, Las Bambas, Toromocho, and Rio Blanco, which have an estimated annual production more than 200,000 t Cu. In addition to them, thirteen Cu deposits are discovered from the Paleocene, Eocene-Oligocene, and Miocene Cu belts. Thus, Peru is supposed to produce Cu production from 2014 and increases annual production from 143 Mt Cu in 2012 to 490 Mt Cu in 2019. Due to new discoveries, it is expected that mineral exploration activities in Peru are likely to move from Paleocene Cu belt to Eocene-Oligocene and Miocene Cu belts.
Geophysical and Geological Exploration of Cobalt-rich Ferromanganese Crusts on a Seamount in the Western Pacific
Kim, Jonguk ; Ko, Young-Tak ; Hyeong, Kiseong ; Moon, Jai-Woon ;
Economic and Environmental Geology, volume 46, issue 6, 2013, Pages 569~580
DOI : 10.9719/EEG.2013.46.6.569
Co-rich ferromanganese crusts (Fe-Mn crusts) distributed on the seamounts in the western Pacific are potential economic resources for cobalt, nickel, platinum, and other rare metals in the future. Regulations for prospecting and exploration of Fe-Mn crusts in the Area, which enables the process to obtain an exclusive exploration right for blocks of the fixed size, were enacted recently by the International Seabed Authority, which led to public attention on its potential for commercial development. Evaluation and selection of a mining site can be established based on abundance and grade of Fe-Mn crusts in the site as well as topography that should be smooth enough for mining efficiency. Therefore, acquisition of shipboard echo-sounding and acoustic backscatter data are prerequisite to select potential mine sites in addition to visual and sampling operations. Acoustic backscatter data can be used to locate crust-covered areas in a regional scale with the understanding of acoustic properties of crust through its correlation with visual and sampling data. KIOST had collected the topographic and geologic data to assess the resources potential for Fe-Mn crusts in the west Pacific region from 1994 to 2001. However, they could not obtain acoustic backscatter data that is crucial for the selection of prospective mining sites. Therefore, additional exploration surveys are required to carry out side scan sonar mapping combined with seafloor observation and sampling to decide the blocks for application of an exclusive exploration right.
Water Quality Characteristics of Jeju Island in 1930s
Kwon, Hong-Il ; Oh, Yun-Yeong ; Park, Yoon-Suk ; Kim, Kangjoo ; Hamm, Se-Yeong ;
Economic and Environmental Geology, volume 46, issue 6, 2013, Pages 581~592
DOI : 10.9719/EEG.2013.46.6.581
In this study, the chemical components (pH,
) of water sources (surface water, groundwater, and spring water) in 1930s were compared to those in the period of 1985-1992 in Jeju Island. By the comparison, pH values and
concentrations in 1930s appeared similar to those in the second period (1985-1992) while
increased about the six times in the second period. Such a great increase of
concentration may be caused by the increase of carbon dioxide in the atmosphere due to industrialization.
Scientometric Analysis for Biodiesel
Noh, Kyung-Ran ; Kil, Sang-Cheol ; Oh, Mihn-Soo ;
Economic and Environmental Geology, volume 46, issue 6, 2013, Pages 593~602
DOI : 10.9719/EEG.2013.46.6.593
Biodiesel is an important new alternative transportation fuel and it can be produced by chemically reacting a fat or oil with an alcohol, in the presence of a catalyst. The product of the reaction is a mixture of methyl esters, which are known as biodiesel, and glycerol, which is a high value co-product. The process is known as transesterification. Biodiesel can be used neat and when used as a pure fuel it is known as BD100. However, it is often blended with petroleum-based diesel fuel and when this is done the blend is designated BD5 or BD20(BD20 is a blend of 20% biodiesel and 80% petroleum diesel fuel). Adherence to a quality standard is essential for proper performance of the fuel in the engine and will be necessary for widespread use of biodiesel. In this study, we analyzed 4,144 papers of biodiesel by category, country, institution, keyword etc. from 2001 to 2013 years.