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환경수의 수질자동모니터링 연구(1) : 이온 크로마토그래피에 의한 환경수중의 주요 이온분석
이요상,심순보 충북대학교 건설기술연구소 1994 建設技術論文集 Vol.13 No.2
The purpose of this research is to measure the concentration of ions in environmental water polluted by wastewater using a monitoring system. Using the ionchromatographic system is a simple, selective and sensitive method to determine simultaneously anion and rations in water. Through a number of tests for the various conditions using ionchromatographic system, the optimal condition was found as follows ; the concentration of anion eluent is 5mM Tartaric acid- 7.5% methanol-water, that of ration eluent is 1.5mM pyromellitic acid-22.5% methanol-water(pH 6.25), the flow rate is 1.2㎖/min and the detention time is 30min. The result of analysis for the water samples from Cheongju area showed the good simultaneous separation and good detection. Good ionbalance was also achived ranged from 0.95 to 1.08. From the above tests, it is recognized that the utillization of the ionchromatographic system is an effective way of measurement and can be extended to other environmental water samples.
대청댐 저수지 퇴적물의 용출특성과 수질에 미치는 영향에 관한 연구
이요상,이경식 한국환경영향평가학회 2000 환경영향평가 Vol.9 No.2
In order to solve water quality problem of domestic dam reservoir, many projects have been performed in a point of view to restoration of water quality. This study was carried out to evaluate the effect of release from sediment on water quality and release characteristics. Daecheong dam reservoir was investigated for two years, from 1998 to 1999. The nutrient release rates of Daecheong reservoir is less than foreign eutrophic reservoir at anoxic condition. For the evaluation of the effect of nutrient release on water quality, internal and external loading was calculated at Daecheong reservoir. As total phosphorus loading from sediment is calculated 9.3 ton/yr and inflow loading from Daecheong reservoir watershed 118 ton/yr, internal loading shows the portion of 7.88% to external loading. At this study, because sampling point was choosed at the point where much sediment is accumulated, experimental result is more than average release rates. Because Daecheong reservoir shows complete thermal stratification and anoxic condition below 30m from water surface in summer seasons, released phosphorus from sediment can not transfer to epilimnion and eventually resettles. Therefore sediment has insignificant impacts on water quality on Daecheong dam reservoir.