The aim of this study is to calculate process emission of GHGs(greenhouse gases) in nonferrous-metal industry, such as Zn, Pb, Cu and Ni. In addition, variation and emission of GHGs generated from these company were defined. And then, GHGs algorithm and calculation formular which were considered as production process in each part of nonferrous-metal industry were developed to develop calculation program of GHGs emission. These algorithm and calculation formular would present fundamental direction about other nonferrous-metal industry in the future.

포항지역 널리 분포하고 있는 규질이암으로부터 상업화를 위한 50리터 bench scale 수열장치를 사용하여 Na-A형 제올라이트의 합성을 성공적으로 수행하였고 또한 이 제올라이트를 이용하여 환경 개선재로 활용하는 연구를 수행하였다. 초기물질로 사용된 규질이암은 제올라이트의 주요 성분인 SiO2 및 Al2O3가 각각 70.7% 및 10.0% 함유되어 제올라이트의 합성에 유리한 조성을 가지고 있다. 이전의 실험실적 규모에서 수행된 동일한 조건인 Na2O/SiO2 = 0.6, SiO2/Al2O3 = 2.0, H2O/Na2O = 98.6의 조성비로 80℃에서 18시간 동안 합성한 결과, Na-A형 제올라이트의 결정도 및 결정형태는 실험실적 규모와 유사하였고, 회수율 및 양이온 교환능은 각각 95% 및 215 cmol/kg으로 실험실적 규모에서 보다 약간 우수한 결과를 나타냈다. 합성된 Na-A형 제올라이트를 이용하여 모사폐액(Pb, Cd, Cu, Zn 및 Mn)에 중금속 제거율을 조사한 결과, 중금속 제거율은 Pb 〉 Cd 〉 Cu = Zn 〉 Mn의 순서이었다. Mn을 제외한 다른 중금속들은 1500 mg/L에서 99% 이상의 제거율을 보였고, Mn의 경우도 98%의 제거율을 보여 합성된 Na-A형 제올라이트는 중금속 흡착제로서 우수한 특성을 나타냈다.

Road runoff, one of non-point source pollutants, contains various heavy metals, most of which flow into discharge waters without being treated. The mechanism of removing the heavy metals in water is similar to that of removing micro-particles. Therefore, it is considered that it is possible to remove a lot of the heavy metals contained in the road runoff by filtering or absorbing them. In this paper, performed has been a basic study on the characteristics of UNFS (Up Flow Non-Point Source Filtering System) using carbide pellet and zeolite pellet as double-layer filtering mediums to treat the road runoff. The removal rate with filtering and absorption time has been shown as follows: 29.0% for Cr; 27.8% for Cd; 25.7% for Fe; 25.4% for Co; 21.2% for Pb; 19.6% for Zn; 18.2% for Al; 17.0% for Mn; 11.3% for Ni; 7.5% for Cu. The overall removal rate according to influx change has been shown to be approximately 30%, and the load of heavy metals flowing out in initial precipitation could be reduced by using carbide as a recycling filtering medium. When the removal as coarse particles settle is added up, it is expected that UNFS will result in a higher removal rate.

In this study, in order to analyze the air quality of the indoor environments of schools, we measured the indoor, outdoor and personal exposure concentration level of PM10 for 40 classrooms(20 old, 20 new) in chungnam area from June 22 to July 19 and from November 21 to December 30, 2003. 1. Old classrooms contained more dust than new classrooms; the average of respirable dust is 43.27 ㎍/㎥ for new classrooms while 53.38 ㎍/㎥ for old one. The exposure concentration level of respirable dust in new classrooms were in summer higher outdoors than indoors. The values were indoors 46.71 ㎍/㎥, outdoors 50.46 ㎍/㎥, and personal 41.62 ㎍/㎥. Meanwhile in winter indoors had a higher concentration level than outdoors, the values being indoors 39.11 ㎍/㎥, outdoors 34.86 ㎍/㎥, and personal 49.01 ㎍/㎥. 2. Cr concentration level within dust was slightly higher in summer indoors (101.50±32.10 ng/㎥) and outdoors (100.89±35.18 ng/㎥) than winter indoors (85.80±48.95 ng/㎥) and outdoors (74.43±38.93 ng/㎥), but in personal concentration level, winter was higher. The results of this research show insufficient understanding of health risks from indoor air pollution, and shows possible health problems to students from school indoor air pollution. As such, a logical and systematic education program for students about the importance of indoor air quality should be carried out. Also the results of PM10 concentration level measurements emphasize the need for regular measurements of indoor / outdoor and personal concentration level. New classrooms in particular needs to be used after measuring pollutants and safety, and requires installation of a ventilation device in all classrooms to improve air quality.