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李忠揆,閔在基,金永煥 高麗大學校 倂設 保健大學 保健科學硏究所 1983 保健科學論集 Vol.13 No.1
The Anyang stream is one of the branch streams flowing in to the Han river. Mercury and cadmium concentrations have been measured from water and sediments samples of Anyang stream and other several ones which drains through Han river as an important main source of pollution. The results of study obtained during for 4 months from September to december 1980 were summarized as follows; 1. Average concentrations of conductivity and mercury and cadmium in Anyang stream were Conductivity 952 ㎛hos/㎝ Mercury 0.005 ㎍/㎖ Cadmium 0.0086 ㎍/㎖ 2. Mercury and cadmium average concentrations of sediment materials from Anyang stream were Mercury 1.28 ㎍/g Cadmium 2.80 ㎍/g 3. Mercury and cadmium concentrations of water from Anyang stream exit area were highest among those of other sites. 4. Significant positive correlation was found between cadmium concentrations in water and sediment showing regression line of y=-0.99+441.07X with r=0.68(p<0.01) where y indicates concentration in sediment, x indicates concentration in water, and r indicates correlation coefficient.
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李忠揆,金光鍾,車喆煥 고려대학교 의과대학 1985 고려대 의대 잡지 Vol.22 No.1
A briquet is a source of major energy for heating and cocking in the common households in Korea. For its production, a total of 2,000 workers are employed in 17 briquet factories in Seoul Korea, where they are heavily exposed to the coal dust while working. In this study ail attempt was made to analyze and evaluate the prevalence of pneumoconiosis among 152 coal workers and the ventilatory function in two briquet factories. Also, concentrations of total and respirable dust in The working environment were investigated. To obtain the amount of respirable dust, the total amount of dust in the air of each working place was measured and analyzed based on the size of particles. To determine the prevalence and type of pneumoconiosis, radiographic examinations and pulmonary function test were performed on each workers. The results are as follows: 1. The average concentrations of total and respirable dust in working places of two factories were 16.1mg/㎥ and 10. 2mg/㎥ respectively, both of which are greater than the threshold limit value. The concentrations of the total dust in each section of the factory also were beyond the TLV. The distribution of particles less than 7μ was about 60% of the total amount of dust. 2. The career history of the examines revealed the 5~9 service year group as the largest, with 51 out of 152 workers (33.6%). By the age group, 40~49 year was the largest, 82 out of 152 workers (53.9%). 3. The results of the radiographic examinations showed that 24 workers with pneumoconicsis were advanced to category 1, 2 and 3 with a prevalence rate of 15.8%. The prevalence rate showed a tendency ta increase remarkably in accordance with the age and the number of working years. 4. In case of pneumoconiosis in category 1 , 2 and 3, a high correlation between the age and the number of working years was seen (r=0.547, p<0.01). 5. In the distribution of pneumoconiosis by grade, category 2 was 54.1% of all the cases, category 1, 41.7% and category 3, 4.2%. 6. The %FEV_(1.0) and MMEF of cases were less than that of the normal group. 7. Among the workers exhibiting pneumoconiosis as determined by ventilatory function test, 25% were of obstructive type, 4.2% restrictive type, and 70.8% normal.
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