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황상용(Sang-Yong Hwang) 대한환경위생공학회 2004 대한환경위생공학회지 Vol.19 No.4
From September 1, 2003 to November 30, 2004, 20 mineral water wells were selected for some area in east Europe and the study on their water quality was analized. It revealed that mineral water contained considerable quantity of magnesium ions which helps the smooth activities of vascular muscles, nervous systems and protects skins from allergic reactions. It also lowers cholesterol level and contains high concentration of calcium ions which is one of the vital components of teeth and bone like phosphorus. Thus it is concluded that it is not qualified as boiler feed water as it has overall high degree of hardness by the presence of four times content of Mg²+ and Ca²+.
하수방류수의 총유기물 및 부유고형물질 동시제거용 섬모필터시스템개발
황상용(Sang-Yong Hwang),이규성(Guy-Seong Lee) 한국환경관리학회 2011 環境管理學會誌 Vol.17 No.1
In this study, a Ciliation (500㎥/day) was used at the N sewage treatment center in Seoul to reuse the treated sewage water. when the sewage treatment conditions are deteriorated, SS and CODCr were test using the water bed test method process and the pollution due to the use of the Ciliumfilter was analyzed through SEM. By using the Disk type ciliumfilter, removal efficiency for SS was 49~92% which enaled the process to maintain the effluent water to be less than 3㎎/L. Removal efficiency of TCODcr was 13~56% due to the solubility organic and that of particle was 90% and 78% for particle size less than 20㎚ and 10~48㎚, respectively.
黃相容 동남보건대학 2001 論文集-東南保健大學 Vol.19 No.2
The result of investigating the chemical element of 9 hot spring water in the middle area of Korea after analyzing them from Sep. 1, 2000. to Jun. 30, 2001. shows that differing from the active volcano area in other countryies, the area is made up of the extinct volcano grounds, and the surface water is in condition of being heated by the terrestrial heat. Additionally, those elements are shown as belonging to the simple hot spring which contains less content of elements. The conclusion is as follows. 1. In order to estimate the transition element of those which are dissolved in the hot spring water, before analyzing with the atom extinction method, the result of estimating the sensitivity and detection limitation in the air C₂H₂ and N₂O-C₂H₂ flame showed that each atom is more sensitive in the flame of air-C₂H₂ than in the N₂O-C₂H₂ flame. 2. Li and Na was being increased proportionately. 3. The element relation in Ca and SO₄, Ca and Mg, Cl and Ca, Na and Ca showed the proportionate relationship, and this is thought that each ion which is the element of rocks was flown into the hot spring water.
황상용(Sang-Yong Hwang) 대한환경위생공학회 2006 대한환경위생공학회지 Vol.21 No.3
From March 1, 2005 to August 31, 2006 mineral water wells were selected for 13 areas in Southeast Asia (Indonesia, Philippines, Thailand, Singapore) and 20 areas in Northeast Asia (Korea, North Korea, China, Japan) and the study on their mineral water quality was analyzed. - Mineral water quality was the best in Korea. Mineral spring waters in some area of China and North Korea and in the whole area of the Southeast Asia were of poor quality. - The hardness of mineral water was the low in Korea (10~47㎎/L as CaCO₃), Japan (4~66㎎/L as CaCO₃), Geu㎎ang-san North Korea Area (4㎎/L as CaCO₃). Mineral spring water in Thailand, Indonesia (1~97.5㎎/L as CaCO₃) and in the other area (120~1205㎎/L as CaCO₃) were high degree of hardness. - pH value in the mineral water of Southeast Asia (pH 6.7~8.2) and Northeast Asia (pH 5.9~7.9) was up to WHO standard (pH 6.5~8.5). - Fluorine of negative ion was found in 10 mineral waters: Indonesian mineral water "ATARIN"(0.02㎎/L), Thailand mineral water "SIAM" (0.6㎎/L), "MASAFI" (0.02㎎/L), Korean mineral water "SAEMMULNARA" (1.1㎎/L), "SANSU"(0.6㎎/L), "ICIS"(0.3㎎/L), "DONGWON SAEM-MUL"(0.03㎎/L), "PYEONGCHANG" (0.6㎎/L), North Korean mineral water "KUMGANGSAN"(0.1㎎/L), Japanese mineral water "CRYSTAL GEYSER"(0.55㎎/L). However Fluorine in the other 23 mineral waters were not detectable.