• The Korean Journal of Food And Nutrition
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• v.14 no.2
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• pp.132-137
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• 2001

To know a degree of pollution in agricultural products cultivated around 4 unworked mines located in Chollanam-Do, we investigated a concentration of trace metal to provide the basic data for its residual limits. 28 samples of seven kinds of agricultural products (lettuce, onion. potato, radish, pepper. pumpkin, bean) collected from 4 unworked mines located in Chollanam-Do in 1999 were analyzed by Mercury Analyzer for mercury and Atomic Absorption spectrophotometer for Pb, As, Cd. Cu, Mn, and Zn. Hg contents were detected N.D. ∼trace level (0.01 ppm and less) and As contents were detected N.D. ∼ 0.038 ppm but most of samples were not detected. Cd contents were detected N.D∼0.101 ppm. The results of Hg, As, Pb and Cd content showed that for all the 7 species of agricultural products studied, none have accumulated levels dangerous enough to pose health problems. The average contents of Cu were 4.356∼10.624 rpm in bean. the Mn were 4.332∼24.385 ppm in lettuce and the Zn were 4.072 ∼ 20.715 ppm in bean, respectively.

• Geophysics and Geophysical Exploration
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• v.18 no.4
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• pp.207-215
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• 2015

Electrical resistivity surveys were conducted at two subsidence areas near and at limestone mine sites, respectively, in order to estimate their causes of subsidence and the regions of potential occurrence. In addition, the linkages of mine development with these subsidences were investigated by the rock engineering analysis. Two study areas have different geological setting. One study site is the land subsidence area, which contains clay and sandy soil near the limestone mine, The other study site is the land subsidence area located just above the mine, which is expected to be relevant to the limestone mine. As results of two-dimensional (2D) electrical resistivity surveys at the sites 1 and 2, low resistivity zones, which are 70 ~ 120 ohm-m and 20 ~ 50 ohm-m, respectively, were found under the subsidence zones. For the study site 1, the possibility of subsidence was confirmed by using three-dimensional (3D) inversion performed with 2D resistivity profiles. For the study site 2, the cause of the subsidence and the possibility of subsidence occurrence were confirmed by rock engineering computation with regard to measurement line 7 in which low resistivity accompanied by subsidence area was observed.

• Journal of the Korean GEO-environmental Society
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• v.11 no.2
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• pp.5-11
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• 2010

Abandoned mines release acid mine drainage and cause the contamination of soil and crops around the mine area. The objective of current study is to evaluate effect of mine on the soil and crop contamination. Soils, water, and crops were collected and analyzed, and the heavy metal data were classified into types of the soil, types of crops, and distance from the minehead. Surface soils of the mine area were highly contaminated with heavy metals, especially with zinc and lead. Tailings and cultivated paddy soils were also highly contaminated. Heavy metal concentrations upon distance from minehead decrease steadily as the distance from the minehead increase. The correlation between heavy metals was extracted from soils and the content in the rice samples showed a positive relation for arsenic and cadmium but not a meaningful relation for other metals.

• Photonics industry news
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• s.32
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• pp.18-29
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• 2006

빛고을 광주 첨단 산업단지에 LED신호/조명시스템시범단지가 조성된다. 한국광산업진흥회(회장 이기태)는 지난 2004년부터 오는 2008년까지 5년간 82억원을 투입해 광산업 2단계 육성사업의 일환으로 LED신호/조명시스템시범구축사업을 추진한다. 이 사업은 LED관련 제품의 테스트 베드와 홍보기회를 제공해 관련 산업의 신규 수요를 창출하고 광산업제품의 우수성을 홍보하기 위해 실시된다. 한국광산업진흥회는 이 사업을 통해 LED관련 신기술 및 신제품 개발의 동기부여, LED 관련 시젶품 홍보를 위한 데스트베드 제공, LED관련 제품 수요창출을 통한 기업 매출증대 및 지역경제 활성화에 크게 기여할 계획이다.

• Photonics industry news
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• s.45
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• pp.30-33
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• 2008

• Photonics industry news
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• s.35
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• pp.64-69
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• 2006

• Photonics industry news
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• s.33
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• pp.8-9
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• 2006

• Journal of the Mineralogical Society of Korea
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• v.16 no.3
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• pp.265-280
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• 2003

The Mugeuk mineralized area that associated with the pull-apart type Cretaceous Eumseong basin is composed of several gold-silver vein deposits that are emplaced in late Cretaceous biotite granite. The gold-silver deposits in the area show various hydrothermal alteration zones as well as Au/Ag ratios and ore mineralogy. The Geumbong mine showing relatively high gold fineness is composed of multiple veins and show alteration pattern; vein \longrightarrow phyllic \longrightarrow subphyllic \longrightarrow propylitic \longrightarrow subpropylitic zone. In contrast, The Taegeuk mines show the low fineness values, in far southern part are characterized by increasing tendency of simple and/or stockwork veins. The deposit displays alteration pattern; vein \longrightarrow propylitic \longrightarrow subpropylitic zone. Variations of alteration zone with depth show that phyllic zone are dominant in deeper level and propylitic zone sporadically overlapped by argillic zone are dominant in shallow level. The differences of alteration pattern between the gold-silver deposits are reflect the evolution of the hydrothermal fluids; the ore-forming fluids of the Geumbong mine are at relatively high temperature and salinity and highly-evolved meteoric water, developing phyllic zone, the Taegeuk mine containing greater amounts of less-evolved meteoric waters shows relatively low temperature and salinity in ore-forming fluids, developing propylitic zone. The various physicochemical environment for gold-silver mineralization in the Mugeuk mineralized area is due to proximity from heat source area (Mugeuk mine) to marginal area (Taegeuk mine) in a geothermal field. Therefore, it is suggested that the criteria for project exploration in the area are to focus on the area proximal to heat source and phyllic zone.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.1022-1026
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• 2009

우리나라에서는 1980년대 초반부터 비점오염원 원단위를 산정하기 시작하였으나 모두 단일강우 또는 제한된 수의 실측자료만을 이용하였다. 각 토지이용에 따른 비점오염의 유출특성을 충분하게 반영하지 못하였기 때문에 강우량의 변화가 큰 지역의 경우, 강우 특성에 따라 특정 기간에 과도하게 오염부하가 산정될 수 있다. 최근 수질오염의 특징은 과거의 대량 발생원인 점오염에 의한 수질오염에서 도시 강우 유출수나 농경지 등으로부터 대량의 비점오염에 의한 수질오염으로 변화하고 있다. 그러나 비점오염은 점오염과 같이 일정한 출구를 통해 유출되지 않으므로 집중처리에 의한 조절 방법의 적용이 곤란한 형편이다. 본 연구에서는 광산(저탄장) 지역의 모니터링을 실시하여 계절별 비점오염부하 유출특성에 대하여 조사하였고, 오염부하와 EMC 농도를 산정하여 분석하였다. 본 연구는 장기적인 모니터링 과제로 향후 지속적인 모니터링을 실시하여 수질분석과 유량을 측정한다면 광산(저탄장) 지역의 비점오염부하 산정 시 유용한 자료로 활용될 것으로 판단된다.

• Photonics industry news
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• s.65
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• pp.20-22
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• 2011

광산업이 신성장동력산업으로 각광받고 있다. 특히 광주광산업은 미래 먹거리를 위해 10여 년부터 진행된 지역전략산업진흥사업의 가장 성공적인 모델로 자리를 잡아가고 있다. 광주광산업은 소비도시로 알려진 광주의 경제지도도 바꿔놓고 있다. 자동차와 가전산업과 함께 광주시 3대 주력산업으로 광산업이 당당히 어깨를 견주고 있는 것. 한국광산업진흥회에 따르면 지난해 광주광산업 매출은 2조 5,400억원이었다. 지난해 1조 6천 억원에 비해 1조원 가량 매출이 늘었다. 매출증가는 후발경제요소인 일자리 창출에도 긍정적인 역할을 미치고 있다. 지난해 8,000여 명이 광산업 분야의 일자리를 얻었다. 벤처수준에 불과했던 광산업 기업들의 성장세도 눈부시다. 기술력과 시장 잠재력을 믿고 광주에 둥지를 튼 기업들이 이제는 어엿한 중견기업으로 성장하고 있다. 지난 10여년간 각종 시행착오와 어려움을 겪으면서 이들 기업들은 내공을 단련해왔다. 때마침 전세계적으로 인터넷 열풍이 불었고 기후변화에 따른 녹색성장에 대한 공감대가 퍼져가면서 광통신과 LED 등 광산업 수요가 크게 늘기 시작했다.