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합성폐수 내 인을 제거하기 위한 TiCl<sub>4</sub> 농도 및 초기 pH 최적조건 도출
신소연,김종호,안종화,Shin, So-Yeun,Kim, Jong-Ho,Ahn, Johng-Hwa 한국물환경학회 2015 한국물환경학회지 Vol.31 No.6
This study experimentally determined the effect of titanium tetrachloride (TiCl<sub>4</sub>) concentration ([TiCl<sub>4</sub>]) (0.25-0.55 mM) and initial pH (3-11) on phosphorus (P) removal in synthetic wastewater (2 mg P/L). The P removal efficiency increased when [TiCl<sub>4</sub>] increased. The P removal efficiency showed a parabolic trend with an inflection point at pH 7. At the molar ratio of TiCl<sub>4</sub> and P>6.2, the P removal efficiency was over 90% and the residual P concentration was less than 0.2 mg/L. Within the design boundaries, the complete P removal could be achieved at 7.0≤initial pH≤8.5 and 0.43≤[TiCl<sub>4</sub>]≤0.55 mM. The final pH was over 5.8 at initial pH≥7.7 and [TiCl<sub>4</sub>]≥0.35 mM. The results showed that TiCl4 was effective in P removal in water so that it could be an alternative chemical for P removal.
마이크로웨이브를 이용한 폐수 내 고농도 암모니아성질소 제거
신소연 ( So Yeun Shin ),구본흥 ( Bon Heung Koo ),김태현 ( Tae Hyun Kim ),이유학 ( Yu Hak Lee ),안종화 ( Johng Hwa Ahn ) 한국물환경학회 2014 한국물환경학회지 Vol.30 No.5
Industrial use of microwave heating as an alternative to conventional heating is becoming popular mainly due to dramatic reductions in reaction time. Therefore, this work experimentally determined the effect of microwave irradiation on ammonia nitrogen removal in wastewater. The effects of air flow rate (0.3~0.9 L/min), treatment temperature (70~100°C), and initial pH (9~11) were characterized. As the air flow rate increased from 0.3 to 0.9 L/min, the ammonia removal rate constant (k) increased from -0.6642 to -1.0755 min-1. As the temperature increased from 70 to 100°C, k increased -0.0338 to -1.0755 min-1. As the pH increased from 9 to 11, k increased -0.2443 to -1.0755 min-1. Ammonia removal was strongly dependent on temperature and pH rather than air flow rate. The results show that microwave irradiation is effective in ammonia nitrogen removal in wastewater due to advantages of fast and effective processing.
합성폐수 내 인을 제거하기 위한 TiCl4 농도 및 초기 pH 최적조건 도출
신소연 ( So Yeun Shin ),김종호 ( Jong Ho Kim ),안종화 ( Johng Hwa Ahn ) 한국물환경학회 2015 한국물환경학회지 Vol.31 No.6
This study experimentally determined the effect of titanium tetrachloride (TiCl4) concentration ([TiCl4]) (0.25-0.55 mM) and initial pH (3-11) on phosphorus (P) removal in synthetic wastewater (2 mg P/L). The P removal efficiency increased when [TiCl4] increased. The P removal efficiency showed a parabolic trend with an inflection point at pH 7. At the molar ratio of TiCl4 and P>6.2, the P removal efficiency was over 90% and the residual P concentration was less than 0.2 mg/L. Within the design boundaries, the complete P removal could be achieved at 7.0≤initial pH≤8.5 and 0.43≤[TiCl4]≤0.55 mM. The final pH was over 5.8 at initial pH≥7.7 and [TiCl4]≥0.35 mM. The results showed that TiCl4 was effective in P removal in water so that it could be an alternative chemical for P removal.
양현식(Yang, Hyun Sik),신소연(Shin, So Yeon),김연지(Kim, Yeun Ji),김재홍(Kim, Jae Hong) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
Dye-sensitized solar cells (DSSC) are currently attracting wide spread academic and commercial interest for the conversion of sunlight into electricity because of their easy manufacturing process and high efficiency. The solar energy conversion efficiencies of DSSC are strongly dependent on dye molecules adsorbed on the TiO2 surface which used for photosensitization of sun light, since an excited state of dye could inject an electron into the conduction band of semiconductor. We have developed novel organic dyes which have phenothiazine moieties as an electron donor in their charge-transfer chromophore for application of DSSCs. We had synthesized a series of phenothiazine derivatives which have different wave length absorbing chromophore in the molecule with high molar extinction coefficient. The photovoltaic performance of DSSC composed of organic chromophores with broad wavelength absorption property were measured and evaluated by comparison with that of pristine ruthenium dye.