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임가희,배성숙 한국치위생감염관리학회 2022 한국임상치위생학회지 Vol.10 No.2
Objectives: In the current study, we measured the air quality of 60 dental clinics and hospitals in Seoul, Gyeonggi-do, and Incheon, with the aim to determine how best to create a pleasant indoor dental environment. Methods: We measured and evaluated the humidity, CO2, total volatile organic compounds (TVOC), particulate matter less than 10 μg (PM-10), CO, NO2, and O3 using a uHoo filter. After dividing by area, region, and scale, air quality measurements were performed using an indoor air quality sensor. The collected data were analyzed using IBM SPSS version 20, and the significance level was set at 0.05. Results: The dental air quality of the included clinics was generally within the range of domestic and international standards, but the TVOC level was higher than domestic standards in operating rooms, Gyeonggi, Incheon, and hospitals. Moreover, in hospitals, the level of humidity was higher than the domestic standards, and the level of NO2 was higher than the domestic and international standards in all areas, regions, and scales of medical institutions. Conclusions: The average value of dental air quality measurements differs by region and scale, highlighting the need for systematic education and environmental improvement.
임가희,이홍길,김형섭,노회정,고형욱,김지인,조훈제,김현구 한국지하수토양환경학회 2018 지하수토양환경 Vol.23 No.6
Although fluoride is an essential trace element, ingestion of excessive amount of fluoride could have detrimental effect onhuman health. Generally, the bioavailability of fluoride in soils was low, but it could be harmful to the environmentdepending on the soil properties. Therefore, it is necessary to understand the concentration distribution, and fate andtransport characteristics of fluoride to establish a resonable management strategy for fluoride pollution. This study wasconducted to evaluate nationwide fluoride distribution in soils in Korea, as well as its fate and transport characteristics. The average background concentration was 204.5 (15.3~504.8) mg/kg, which is lower than the values of foreign soils. Forthe three regions of different land use, the average concentration was 229.6 mg/kg in region 1, 195.7 mg/kg in region 2,and 273.4 mg/kg in region 3. The concentration of fluoride was the highest in soils from Youngnam block within tectonicstructure derived from metamorphic rocks. The results of sequential extraction to access F bioavailability showed fluoridein soils mainly existed as a residual form, which suggests the bioavailability of fluoride was relatively low. Soil propertiessuch as soil pH, CEC, and clay content were found to affect F bioavailability of soil.
임가희,김권래,김기훈,서병환 한국토양비료학회 2014 한국토양비료학회지 Vol.47 No.3
Absorption and accumulation of heavy metals in plants were determined by phytoavailable contents ratherthan total contents of heavy metals. Therefore, phytoavailability-based management protocol should beprepared for safe food crop production in contaminated agricultural lands. This study was conducted tounderstand the distribution and phytoavailability of heavy metal in the Korean agricultural soils affected byabandoned mining sites along with investigation of soil properties (soil pH, OM, DOC, clay content, Al/Fe/Mncontent) influencing on the metal phytoavailability. For this, 142 agricultural soils located nearby 39abandoned mining sites distributed in five province in Korea, were analyzed. Among the four different heavymetals, cadmium (Cd) and zinc (Zn) appeared to exist in more phytoavailable form than cupper (Cu) and lead(Pb). Soil pH was the main factor governing phytoavailable Cd, Pb, and Zn showing positive relationship withpartitioning coefficients of the corresponding metals; Cd (r = 0.66, P < 0.001), Pb (r = 0.70, P < 0.001), and Zn(r = 0.62, P < 0.001). This implied higher phytoavailability of the corresponding metals with higher soil pH. Incontrast, phytoavailability of Cu (r = 0.41, p < 0.01) was only negatively related with soil DOC (dissolvedorganic carbon).
농경지 토양의 중금속 오염원 및 농작물로의 중금속 전이·축적 평가
임가희,조훈제,박경훈,윤성미,김지인,노회정,김현구,윤정기,Lim, Ga-Hee,Jo, Hun-Je,Park, Gyoung-Hun,Yun, Sung-Mi,Kim, Ji-In,Noh, Hoe-Jung,Kim, Hyun-Koo,Yoon, Jeong-Ki 한국지하수토양환경학회 2018 지하수토양환경 Vol.23 No.3
It is important to identify the contaminant sources and to evaluate the fate and transport of heavy metals to crops in agricultural lands. This study was conducted to evaluate metal sources and its transfer and accumulation to crop in agricultural soils. Pollution indices were calculated and multivariate analysis was performed to identify metal sources. To evaluate transfer and accumulation of metals to crops, the contents of phytoavailable metals were evaluated by using single extraction method and the correlation between metal content and soil properties was analyzed. Also the BCF was quantitatively evaluated for investigating the metal transition to each crop grown in the research area. As a result, Cr, Ni, and Co were expected to be mainly derived from geologic factors due to weathering of certain parent rocks. The content of nickel in soils of the research area was slightly higher than that of the concern level criteria based on total concentration, but the amount transferred and accumulated in the crops was actually low. Understanding the contamination characteristics by investigating the pollution sources of heavy metals and its transfer and accumulation to crops through various evaluation techniques could provide important information for proper management of the agricultural land.
Quality Assessment of the Soils Used for Urban Agriculture in Seoul and its Vicinity
임가희,박솔이,전다솜,윤정환,이단비,오준석,김계훈 한국토양비료학회 2016 한국토양비료학회지 Vol.50 No.4
Soil quality assessment is an important tool for environmental management in an agricultural field. It can be used to evaluate the health of the soils and to establish the basis for sustainable urban agriculture and soil management. For this study, the chemical properties of the soils used for urban agriculture were examined. Results of the soil analysis for chemical properties were applied to soil quality assessment system, which is composed of principal component analysis, application to scoring function and derivation of soil quality index (SQI). Soil pH, electrical conductivity (EC), organic matter (OM), total nitrogen (T-N) were determined for minimum data set (MDS) according to principal component analysis. Based on the results of scoring for four indicators (pH, EC, OM, T-N), soil pH was the indicator that needs the most urgent management. Results of SQI derivation showed that many of the urban farms appeared to be insufficient score in comprehensive soil quality assessment. In conclusion, soil management practices based on scores derived from soil chemical indicators need to be carried out to maintain sustainable urban agricultural soil environment and to provide easy-to-understand information to urban farmers.
폐광산 인근 농경지 토양의 중금속 유효도 분포와 유효도에 영향을 미치는 토양특성
임가희 ( Ga Hee Lim ),김계훈 ( Byoung Hwan Seo ),서병환 ( Kwon Rae Kim ),김권래 ( Kye Hoon Kim ) 한국환경농학회 2013 한국환경농학회 학술대회집 Vol.2013 No.-
우리나라 중금속 오염 농경지는 상당수가 폐광산 인근에 분포하고 있고, 작물생산을 위한 영농활 동이 지속적으로 이루어지고 있다. 이러한 지역에서 생산된 농산물의 안전성 문제가 제기되고 있어, 생산 단계에서 작물의 중금속 흡수를 저감시키기 위한 관리방안이 필요한 실정이다. 식물에 의한 중 금속 흡수는 토양 중 중금속 총농도에 의한 영향보다 중금속 유효도에 영향을 받으므로 유효도 관리 에 초점을 맞추어야 할 필요성이 있다. 토양 내 중금속 유효도는 토양 pH, 유기물함량, 양이온교환 용량, 점토함량 등 다양한 이화학적 특성에 따라 결정된다는 많은 연구결과가 보고되고 있다. 따라서 안전한 농산물 생산을 위해서는 토양 내 중금속 유효도와 토양특성을 함께 고려해야 한다. 본 연구 에서는 폐광산 인근 오염 농경지에 대한 관리방안을 모색하고자 하는 연구의 일환으로 폐광산의 영 향을 받은 농경지 토양의 중금속 유효도와 이에 영향을 미치는 토양특성을 알아보고자 하였다. 우리나라 폐광산 인근 농경지 토양 142점을 채취하여 실험 재료로 사용하였으며, 풍건한 토양의 pH, 유기물(O.M.), 용존유기탄소(DOC), 점토함량, 알루미늄·철·망간 산화물 함량, 왕수분해법에 의한 중금속(Cd, Cu, Pb, Zn) 총농도, 1 M NH4NO3 침출법과 0.02 M Ca(NO3)2 침출법에 의한 중 금속 유효태 농도를 측정하였다. 각 측정값은 pH와 점토함량을 제외하고, 로그값으로 변환 후 토 양특성과 중금속 함량 및 유효도 간의 상관관계를 선형회귀분석을 통해 분석하였다. 중금속 유효태 농도에 대한 중금속 총농도의 비율로 산출한 분배계수 Kd d, Kd e값은 토양의 중금 속 유효도를 나타낸다. Cu를 제외하고 Cd, Pb, Zn의 Kd값은 토양 pH와 양의 상관관계를 나타냈 는데, 이는 토양 pH가 상승함에 따라 중금속 유효도가 감소한다는 일반적인 이론과 상응하는 결과 였다. Kd값과 유기물 및 DOC와의 상관관계에 있어서는 Cd, Cu, Pb, Zn 모두가 대체적으로 음의 상관관계가 있는 것으로 나타났고 이는 유기물이 증가할수록 토양 내 중금속 유효도가 증가한다는 것을 의미한다. 알루미늄·철·망간 산화물 함량과 Kd값과의 상관관계는 Cd, Cu, Pb, Zn 모두에 서 양의 상관관계를 나타냈으며 이는 양이온흡착능력이 많은 토양일수록 중금속을 흡착하는 능력 도 커져 유효도가 감소하는 것을 의미한다. 이상 결과를 종합해 볼 때 중금속 종류별로 상관관계 정도의 차이는 있으나 토양 pH, 유기물 및 DOC, 알루미늄·철·망간 산화물의 함량이 중금속의 유효도를 결정하는 주요 인자로 판단된다. 따라서, 유효도 관리를 위해서 이들 인자들이 고려되어 야 할 것이다.