• 한국지구과학회지
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• 제42권4호
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• pp.383-389
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• 2021

Several studies investigating the behavior and environmental distribution of rare earth elements (REEs) have been reviewed to determine the geochemical processes that may affect their concentrations and fractionation patterns in groundwater and whether these elements can be used as tracers for groundwater-rock interactions and groundwater flow paths in small catchments. Inductively coupled plasma-mass spectrometry (ICP-MS), equipped with an ultrasonic nebulizer and active-film multiplier detector, is routinely used as an analytical technique to measure REEs in groundwater, facilitating the analysis of dissolved REE geochemistry. This review focuses on the distribution of REEs in groundwater and their application as tracers for groundwater geochemistry. Our review of existing literature suggests that REEs in ice cores can be used as effective tracers for atmospheric particles, aiding the identification of source regions.

• 대한자원환경지질학회:학술대회논문집
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• 대한자원환경지질학회 2004년도 International Symposium
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• pp.1-8
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• 2004

• 생태와환경
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• 제40권4호
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• pp.553-559
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• 2007

The vertical distributions of sulfate reducing bacteria (SRB) in sediments of lakes in Korea (Lake Sihwa and Lake Soyang) and China (Lake Aha and Lake Erhai) were investigated by fluorescence in situ hybridization (FISH). SRB from sediment of Lakes of China were located to deeper layer than those in Lakes of Korea. SRB were not detected below 19 cm and 10 cm depth in sediments of Lake Sihwa and Lake Soyang, respectively. SRB numbers were, however, detected at all observed sediments in Lake Aha and Lake Erhai. In case of lakes in Korea, the proportion of SRB ranged from 2.9 to 25.6% (Lake Sihwa) and ranged from 0.6 to 7.1% (Lake Soyang). For lakes in China, the proportions of SRB were from 0.6 to 19.4% and from 2.9 to 11.2% within sediments from Lake Aha and from Lake Erhai, respectively. The high peaks of SRB numbers in sediments of all lakes were appearing at depths between 0 cm and 2 cm.

• 대한자원환경지질학회:학술대회논문집
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• 대한자원환경지질학회 1999년도 춘계 공동학술발표회
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• pp.337-340
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• 1999

• 한국암석학회:학술대회논문집
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• 한국암석학회 2003년도 춘계학술대회
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• pp.54-54
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• 2003

• 대한자원환경지질학회:학술대회논문집
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• 대한자원환경지질학회 2007년도 춘계 지질과학기술 공동학술대회
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• pp.127-129
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• 2007

See Full Text

• 대한자원환경지질학회:학술대회논문집
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• 대한자원환경지질학회 2004년도 International Symposium
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• pp.9-28
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• 2004

Concern about arsenic is increasing throughout the world, including areas of the United States. Elevated levels of arsenic above current drinking-water regulations in ground and surface water can be the result of purely natural phenomena, but often are due to anthropogenic activities, such as mining and agriculture. The current study correlates arsenic speciation in acid mine drainage and mining influenced water with the important water-chemistry properties Eh, pH, and iron(III) concentration. The results show that arsenic speciation is generally in equilibrium with iron chemistry in low pH AMD, which is often not the case in other natural-water matrices. High pH mine waters and groundwater do not 짐ways hold to the redox predictions as well as low pH AMD samples. The oxidation and precipitation of oxyhydroxides depletes iron from some systems, and this also affects arsenite and arsenate concentrations differently through sorption processes.

• 자원환경지질
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• 제28권3호
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• pp.213-220
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• 1995

Geochemistry of stream water and sediment collected in the vicinity of the Donghae coal mine in the Samchuk coalfied were investigated in order to evaluate the environmental impacts of acid mine drainage. The pH of stream water ranges from 2.85(at 2 km away from the mine) to 7.92(at uncontaminated tributary). The main cation and anion species in the upper stream are $Ca^{2+}$ and $SO_{4}{^2-}$, respectively. The level of pH and the amount of $HCO^{3-}$ in stream water increase to the downstream and where uncontaminated small tributaries are joining, and in the area covered with limestone. From the results of thermodynamic calculation, the main forms of iron in stream water are estimated as $Fe^{2+}$ and $FeSO_{4}{^0}$, and most of them could be precipitated as FeO(OH) with increase of pH. The white precipitates in stream sediments particularly found around the coal mine are proved to be $Al(OH)_3$ by XRD and XRF analysis. As a result of investigation for seasonal variation of AMD, the level of pH decreased and conductivity increased in dry season.

• 한국대기환경학회지
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• 제12권2호
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• pp.189-198
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• 1996

Mercury (Hg) is ubiquitous throughout the earth's atmosphere. The uniqueness of its atmospheric geochemistry is well-known with the high environmental mobility and relatively long atmospheric residence time (c.a., 1 year) associated with its high chemical stability. Despite a growing recognition of the environmental significance of its global cycling, the prexisting Korean database for atmospheric Hg is extremely rare and confined to a number of concentration measurements conducted under relatively polluted urban atmospheric environments. To help activate the research on this suvject, an in-depth analysis on the current development in the measurements of atmospheric mercury and the associated fluxes has been made using the most using the most updated data ests reported worldwide. As a first step toward this purpose, the most reliable techniques commonly employed in the measurements of its concentration in the background atmosphere are introduced in combination with the flux measurement techniques over soil surface such as: dynamic enclosure (or field flux chamber) method and field micrometeorological method. Then the results derived using these measurement techniques are discussed and interpreted with an emphasis on its mobilization across the terrestrial biosphere and atmosphere interface. A unmber of factors including air/soil temperature, soil chemical composition, soil water content, and barometric pressure are found out to be influential to the rate and amount of such exchange processes. Although absolute magnitude of such exchange processes is insignificant relative to that of the major component like the oceanic environment, this exchange process is thought to be the the predominant natural pathway for both the mobilization and redistribution of atmospheric Hg on a local or regional scale.

• 자원환경지질
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• 제51권3호
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• pp.249-277
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• 2018

이 자료는 학술지 "자원환경지질(구(舊). 광산지질)"에 수록된 논문을 대상으로 전반적인 연구동향을 살펴봄으로써 현재까지의 연구성과를 점검하고 앞으로의 발전과제를 탐색하기 위한 목적으로 수행되었다. 이를 위해 10년을 단위로 하는 시대별, 학회지명 변경 시점별, 10권을 단위로 하는 권호별로 구분하여 연구동향을 분석하였다. 분석대상은 1968년 창간호부터 최근 2017년까지 게재된 학술논문 1,886편이다. 분석결과를 바탕으로 다음과 같은 결론을 도출하였다. 전체적으로 보면, 창간이후 현재까지 '암석학 및 지구화학' 분야의 논문이 30.4%로 가장 높은 비중을 차지하며, 그 다음으로 '금속광상'과 '지구물리 및 탐사' 분야가 각각 18.3%, 14.9%로 비교적 높은 분포를 나타내고 있다. 학회지명 변경 시점을 기준으로 가장 뚜렷한 차이를 보이는 영역은 '암석학 및 지구화학' 분야이다. "광산지질"에서 "자원환경지질"로 학회지명 변경 이전인 1993년까지는 '암석학 및 지구화학'의 논문이 21.5%(121편)였지만 "자원환경지질"로 변경된 1994년 이후는 34.1%(452편)를 차지한다. 학술지 권호 및 연구분야별 분석결과에 따르면, '암석학 및 지구화학'의 논문은 21-30권호부터 급증하는 경향을 보이고 있다. 그러나, '금속광상'과 '비금속광상' 영역은 최근호로 올수록 감소하는 추세가 두드러지고 있다. 본 자료는 학술지 "자원환경지질"의 50년 역사를 종합적으로 재조명하기 위해 수록된 논문들을 양적으로 분석하고 이를 토대로 향후 발전과제를 탐색해 봄으로써 총체적 모습을 파악하기 위한 단초를 제공했다는데 의의가 있다.