• 자원환경지질
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• 제42권5호
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• pp.403-412
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• 2009

이산화탄소의 지중저장이 가능한 것으로 알려진 대염수층에서, 과임계이산화탄소 접촉에 의한 대표적 규산염 광물인 장석류의 지화학적 변화를 규명하기 위해 고압셀 실험을 실시하였다. 단일 시료광물인 사장석($[Ca:Na_2]O{\cdot}Al_2O_3{\cdot}2SiO_2$)과 정장석($KAlSi_3O_8$) 슬랩을 과임계이산화탄소를 형성하는 지중 조건을 재현한 고압셀 내부(100 bar, $50^{\circ}C$)에 고정시킨 후, 과임계이산화탄소와 30일 이상 반응시켰다. 고압셀 실험은 pH 8로 적정한 증류수(염수의 pH)를 포함한 과임계이산화탄소-염수-장석 반응과 염수를 제외한 과임계이산화탄소-장석 반응으로 구분하여 실시하였다. 반응 시간에 따른 장석의 표면 변화를 규명하기 위하여 광물 슬랩 평균 표면 거칠기 변화, 물 시료 내 용존 이온 변화, 반응 후 고압셀 내부에 형성된 침전물 성상을 규명하였다. 과임계이산화탄소-염수-장석 반응 실험 결과 사장석 표면의 평균 거칠기 값이 실험 전에는 0.118 nm에서 반응 30일 후에는 2.493 nm로 약 20배 이상 증가하였으며, 정장석 표면의 경우에도 표면 평균 거칠기 값은 0.246 nm에서 1.916 nm로 증가하였다. 이러한 표면 거칠기 변화는 SPM 이미지 사진에서도 관찰되어, 지중 대수층의 장석은 지중 주입된 과임계이산화탄소와 공극 내 존재하는 염수와 접촉하여 수 개월 이내에 용해/침전 반응이 진행될 것으로 판단되었다. 과임계이산화탄소에 의해 고압셀 내 물시료의 pH는 4로 떨어졌고, 사장석 슬랩 실험의 경우 물시료의 양이온 농도 분석 결과 $Ca^{2+}$와 $Na^+$ 농도가 75 mg/L, 50 mg/L로, 가장 많이 용해되는 것으로 나타났으며, 정장석의 경우 $Al^{3+}$, $K^+$, $Si^{+4}$, $Na^+$ 순으로 용존 이온 농도가 높았다. 고압셀 안에 침전된 고상 물질의 성분 분석결과 사장석 실험의 경우 Ca를 다량 함유한 무정형의 규산염 물질이었으며, 정장석의 경우에는 카올리나이트가 침전됨을 알 수 있었다. 염수를 제외한 과임계이산화탄소와 장석만을 반응시킨 셀실험의 경우에는 반응 시간에 따른 광물 표면의 평균 거칠기 값의 변화나 광물 표면의 용해현상도 거의 나타나지 않아, 물이 없는 환경에서 광물과 과임계이산화탄소와의 반응에 의한 광물의 상변화 정도는 현저하게 낮을 것으로 판단된다.

• 한국지구과학회:학술대회논문집
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• 한국지구과학회 2001년도 정기총회 및 추계학술발표 논문요약집
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• pp.34-34
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• 2001

• 한국암석학회:학술대회논문집
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• 한국암석회.한국광물학회 2009년도 공동학술발표회 논문집
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• pp.10-10
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• 2009

• 대한한의학방제학회지
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• 제11권2호
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• pp.61-82
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• 2003

Objectives: This study has been done to make sure the Gypsum's standardization in medical use. Gypsum has a quality for removing pathogenic heat from the stomach meridian function and headache. Methods: I studied the herbalogical Gypsum and compared its' compositions and character before and after high temperature burning. Results: Gypsum and Lishi(理石) are the sulfate which is made of $CaSO_4{\cdot}2H_2O$, Feldspar is a Calcite, Hanshuishi(寒水石) and Ningshuishi(凝水石) are not a Gypsum but a Magnesium Sulfate($MgSO_4$) and Kalium Sulfate($K_2SO_4$). Conclusion: Real Gypsum is supposed to be Yiong cheng${\setminus}$(應城) Gypsum. Chemical edible Gypsum isn't appropriated to be used in medicine.

• 자원환경지질
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• 제11권2호
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• pp.81-88
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• 1978

Nearly 300 bottom sediments and 20 box-cores were sampled from the Asan bay. The central portion of the Asan bay is covered by sand, slightly gravelly sand and gravelly muddy sand. Between the central and marginal zones gravelly mud and slightly gravelly sandy mud are characteristically distributed. The gravel population in the sediments seems to be originated from the rocky bottom on the area near the bay because the gravel is angular and composed of the schist and gneiss. The quartz/feldspar ratio is about 3/2. It is considered to be that the amount of feldspar in this bay is much higher than that of any other areas in the Yellow Sea. This is considerd to be comparatively short distance of transport ion of these sediment from the provenance.

• 한국세라믹학회지
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• 제35권6호
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• pp.575-582
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• 1998

Sutiability of Jungsan clay shale dolomite sludge Anyang feldspar and alumina as raw materials for light-weight porous ceramics was examined. In order to find optimum manufacturing conditions compositions heating temperatuers and heating times were varied and their effects on physical properties were measured and bloating mechanism was investigated. Jungsan clay seems suitable as raw material to make the light-weight constructional materials with 5wt% of ANyang feldspar and alumina added in calcined clay (800$^{\circ}C$) having bulk density of 0.45g/cm3 water absorption of 1.34% and compressive strength of 85kg/cm2 rapid-heated at 1200$^{\circ}C$ for 30min. It is suggested that bloating mechanism depends on the difference of tem-peratures between the inside and outside in specimen the remained gases in interstices can bloat by the li-quid phase of surface with high viscosity and gas pressure at elevated temperature.

• 한국광물학회:학술대회논문집
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• 한국광물학회 1997년도 창립 10주년 기념 산업광물 심포지엄
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• pp.74-88
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• 1997

• 대한화학회지
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• 제10권2호
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• pp.67-75
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• 1966

Four kinds of clays from Sinyewon mine which is located in Chungchoungnam-Do district and two kinds of Japanese clays (Gairome, Kibushi) were selected and studied on the fundamental properties of these clays and those which are refined by the elutriation method. Chemical analysis, grading analysis such as refractoriness, specific gravity, color, fired color and plasticity, particle size distribution, various thermal tests, X-ray diffraction analysis and electron microscopic survey were carried out on these clays. The comparison of domestic clays with Japanese clays was made. 1. In chemical composition and physical properties, these four kinds of Sinyewon clays are almost similar to each other and also to Gairome and Kibushi clays. In refractoriness, Gairome and Kibushi clays have relatively high value such as SK 34 and 35, while Sinyewon clays have the value of about SK 32. Especially Sinyewon clay B has the low refractoriness (SK 18) and plasticity. Refined clays have the tendency of somewhat higher value than crude ones in refractoriness. 2. When burnt up to $900^{\circ}C$, the coefficients of contraction of Sinyewon clays were under 1.5%, Gairome under 1.3%, Kibushi under 3.0%. Only Sinyewon clay B showed expansion (1.0%) instead of contraction. 3. X-ray diffraction analysis and electron micrography showed that all of four Sinyewon clays and two Japanese clays are mainly composed of poorly crystallized kaolin, containing small amount of halloysite, sericite and considerable amount of quartz and feldspar. Sinyewon clay B contains especially large amount of quartz and feldspar. In general, it has been found out that the refined clays were free from large amount of iron oxide, quartz and feldspar.

• 보존과학연구
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• 통권21호
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• pp.233-271
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• 2000

This study has proved if there are homogeneities in crystal structures, firing temperaures and element compositions of 69 specimens for potteries and soils from Changdo, Kangjin-gun, Jinjuk-Ri in Korea and Yaezhou inChina and obtained the following results.1. XRD analyses showed that soft potteries seemed to contain ($\alpha$)quartz, feldspar, while hard potteries seemed to contain ($\alpha$-)quartz, mullite, tridymite, feldspar. Jinjuk-Ri soils consisted of clays such as Kiolinite, Montmorillonite, Muscovite, Illite and, mica and feldspar etc.2. It was estimated that the firing temperatures which are determined by crystals using XRD, ranged from $550^{\circ}C$ to $870^{\circ}C$ for soft potteries and $870^{\circ}C$ to $975^{\circ}C$ for hard potteries.3. The firing temperatures for 4-pieces of Changdo pottery were measured by using TG-DTA, and it was found that specimen No. 10 was fired at temperatures below $600^{\circ}C$, while specimens No. 14, No. 23 and No. 29 were fired at temperatures above $1000^{\circ}C$.4. It was found that the specimems for potteries and porcelains from Changdo, Kangjin-gun, Jinjuk-Ri in Korea and Yaezhou in China were apparently classified into 4 clusters. This suggests that there are no correlations between the raw materials used in each 4 regions. Among the porcelains from Changdo, there were many typologically similar ones to those from Yaezhou in China in the 9th centry, but the analyses of porcelains only from Changdo, Kangjin in Korea and Yaezhouin China showed that they were classified into 3 clusters. This suggest that there are no correlations between the raw materials used for making porcelains in Changdo, Kangjin-gun, Jinjuk-Ri in Korea and Yaezhou in China.

• 한국환경과학회지
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• 제19권11호
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• pp.1363-1374
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• 2010

This study examined the physical and chemical properties of soil in Jang-San wetland in Busan Metropolitan City. The wetland covers wide and flat area comparing to its outside. The samples of the wetland soil were collected and analyzed in order to identify the profiles and chemical properties. According to the analyses of soil moisture and particle size distribution, the wetland soil mostly belongs to sandy loam with the soil moistures of 14.9-153.2%. The soil profiles are configured with O, A, B, and C horizons from the land surface. The organic matter content (2.38-16.7%) at most sampling locations decreases downwardly with the highest at 0-20 cm depth. The organic matter content has a good positive relationship with soil moisture content. According to X-ray diffraction analysis, the wetland soils contain quartz and feldspar (the main components of rhyolite porphyry) as well as montmorillonite, gibbsite, and kaolinite (the weathered products of feldspar). The wetland soil displays the highest iron concentration (average 22,052 mg/kg), indicating oxidation of iron. High concentrations of potassium (average 17,822 mg/kg) and sodium (average 5,394 mg/kg) originate from the weathering of feldspar. Among anions, sulfate concentration is highest with average 9.21 mg/kg that may originate from sulfate minerals and atmosphere.