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김학성(Hag Seong Kim),이진필(Jin Phil Lee),한훈석(Hoon Suk Han) 한국유화학회 1999 한국응용과학기술학회지 Vol.16 No.1
N/A For a cosmetic plant wastewater containing surfactants of high concentration, adsorption treatment by granular activated carbon(GAC) having different pore size distribution was studied. Three sorts GACs were used and regenerated afterwards with methanol. Experiments were composed of batch process and column test for both virgin and regenerated GACs. Following conclusions were drawn from the study : Methylene blue activating substance(MBAS) adsorption data from the batch tests for three GACs are described well by BET isotherm and Freundich isotherm. Simulation with the BET isotherm shows that maximum adsorption appears to be affected not only by specific surface area but also by pore size distribution. Maximum adsorption from the BET isotherm for MBAS appears to diminish as the number of reactivation increases. The diminshing ratio of maximum adsorption appears to decrease as the pore size methanol ranges from 95% to 97%.
온라인 중금속 측정기기(MONI-HM)의 상대정확도 산정방법 연구
박정하 ( Jung-ha Park ),김성옥 ( Sung-ok Kim ),이진필 ( Jin-phil Lee ) 한국환경기술학회 2015 한국환경기술학회지 Vol.16 No.2
본 논문은 「글로벌탑환경기술개발사업」을 수행하여 개발된 온라인 중금속 측정기기(MONI-HM)를 실제 테스트베드에 적용한 후 중금속 측정항목별 배출허용기준 및 실제 배출되는 배출수에서의 농도를 고려하여 저농도 및 고농도에서도 유효성 및 적합성을 보여줄 수 있는 상대정확도 산정방법을 제안하였다. 기존 상대정확도 산정방법은 배출허용기준 값과 기준이 되는 주시험 방법에 의한 측정값의 분포에 따라 적합범위의 폭이 달라지며, 주시험 방법에 의한 측정값이 배출허용기준의 50% 미만일 경우 배출허용기준이 높은 측정항목이 상대적으로 넓은 범위의 적합범위를 갖게 된다. 또한 배출허용기준의 50% 이하에서는 측정항목별로 일정한 적합범위의 폭을 나타내지만 50% 이상일 경우에는 주시험 농도값이 높을수록 적합범위의 폭이 넓어지게 된다. 본 논문에서 제안된 방법은 측정항목별 배출허용기준농도 차이에서 비롯되는 측정항목별 적합범위의 격차를 줄이고자 측정항목별 가중치를 두어 측정항목별 적합범위를 재설정하였다. 측정항목별 배출허용기준농도에 따라 4개의 Part로 구분하였고 각 Part별로 동일한 적합범위를 가지도록 측정항목별 가중치를 설정하였다. Zn, Cu, Cr은 25%, As는 100%, Cr은 125%, Cd는 250%, Hg는 500%의 가중치를 가지며, 측정항목별로 Zn, Cu는 ± 0.05 mg/L, Cr, Pb은 ± 0.025 mg/L, As, Cd은 ± 0.01 mg/L, Hg는 ± 0.001 mg/L의 적합범위를 가진다. 배출허용기준농도가 상대적으로 높은 Zn, Cu, Cr은 기존의 적합범위에 비해 상대적으로 적합범위가 좁혀졌고 배출허용기준농도가 상대적으로 낮은 Cd, Hg은 상대적으로 적합범위가 넓어졌다. 또한 고농도로 갈수록 적합범위가 넓어지는 현상을 해결하여 저농도 및 고농도 모두 동일한 적합범위를 갖는다. We have developed MONI-HM for the "Global Top Environment Technology Development". Considering the concentration of heavy mentals measured in itemized emission standards and wastewater discharged, we use MONI-HM in the test bed in low and high concentrations to demonstrate the effectiveness and suitability in the relative accuracy of the proposed calculation method. Existing method of it changes the range of suitable standards by distribution of data derived from the main analysis method and water quality standards(blue belt). If data derived from the main analysis method is 50% or less of water quality standards(blue belt), analysis items having high water quality standards have suitable standards of a relatively wide range. Also, Under 50% of water quality standards(blue belt) has a constant range of suitable standards of analysis items. However, above 50% of it has the higher data derived from the main analysis method, the wider a range of suitable standards. The application technology of this research is to reset a suitable range of analysis items by giving its a weighted value in order to reduce a gap of suitable ranges of analysis items due to concentration differences of water quality standards of analysis items. It was to divide up 4 parts into water quality standards of analysis items and it was set up its a weighted value, respectively. Analysis items have a weighted value such as Zn 25%, Cu 25%, Cr 25%, As 100%, Cr 125%, Cd 250%, and Hg 500%. Also, analysis items have a suitable range such as Zn ± 0.05 mg/L, Cu ± 0.05 mg/L, Cr± 0.025 mg/L, Pb ± 0.025 mg/L, As ± 0.01 mg/L, Cd ± 0.01 mg/L and Hg ± 0.001 mg/L. Water quality standards of analysis items such as Cu, Zn and Cr became narrow a gap of suitable ranges compared to the existing it. And water quality standards of analysis items such as Cd and Hg became wide a gap of suitable ranges compared to the existing it. Also, as concentration increases, the gap for suitable ranges widen. As this problem solves, it has become a same range of suitable standards regardless of high and/or low concentrations.