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오존처리시 Bromate생성에 미치는 온도 및 pH의 영향
이무강,김영철,최종원 한국환경과학회 2004 한국환경과학회지 Vol.13 No.7
The objective of this study was to investigate the effects of pH and temperature on the formation of bromate, which is ozonation by-products, during ozonation. In this experiment, the operating parameters including pH 3~10 and temperature 15 ~ 30 ℃ were studied. Through the study for the bromate formation, reaction rate constant, and ozonation effect index on pH and temperature, the results obtained are as follows. At the same initial pH condition, the increase of pH shown similar trends even if the reaction variables such as temperature and reaction time of ozonation were exchanged. As pH and temperature were increasing, the bromate concentration was increased but bromine(HOBr+OBf) was decreased with increasing pH from 3 to 10. The activation energy(J/mol) for bromate formation decreased with increasing pH. The rate constants of bromate formation for the reaction of ozone and bromide, and ozone dosage coefficient(K_(o)) increased with temperature and pH. Ozonation effect index(OI) decreased with increasing temperature and pH.
활성탄 전해공정에 의한 돈사폐수 처리 : CI^- 농도의 영향 The Effect of CI^- Concentration
이무강,신현무,라중균 慶星大學校 環境問題硏究所 2001 環境硏報 Vol.11 No.1
Swine wastewater, a major one of livestock wastewaters, was treated using three-dimensional-electrolytic process. The concentration of electrolyte plays a major role in the electrolysis reaction and chloride has been commonly used as electrolyte. The effects of Cl- concentration was studied in the removal of COD, NH4+-N, and T-N. The removal efficiency of NH4+-N was increased with increasing Cl concentration only at higher supply of electric current(2A). In the case of Cl concentration of 2,000 mg/L, it was observed that the removal efficiencies of COD, NH4+-N, and T-N were the highest and after 5 hours reaction those were about 94%, 67%, and 50%, respectively.
朴永圭,李武康 嶺南大學校 工業技術硏究所 1977 연구보고 Vol.5 No.1
The formation constant of the mixed-ligand complexes in the Cd(Ⅱ), Cu(Ⅱ) and Pb(Ⅱ) -Trien-OH system were studied by polarograph. The determined formation constants (log B(ij)) were follows at 25℃ in the ionic strength of 0.1: metal MT MT₂ M(OH)T M(OH)T₂ M(OH)₂T Cd(Ⅱ) 12.22 14.63 13.58 15.45 15.57 Cu(Ⅱ) 20.16 21.78 22.56 Pb(Ⅱ) 9.98 12.51 14.49 It was also confirmed that the mixed ligand complexes in this system were formed above pH 11 by the calculation of the distribution for complexes at the various pH.
Chlorophyll-金屬錯體에 의한 廢水中의 重金屬 除去
김정모,이무강 慶星大學校 環境問題硏究所 1993 環境硏報 Vol.3 No.1
The objective of this study is to get fundamental data of the possiblity of heavy metal removal by Chlorophy which is extracted from plants and the development of dried leaf powder as a adsorbent agent of heavy metals, and the adsorption removal of heavy metals by the aquatic plants. The conclusions obtained in this study were as follows. (1) Leaves of green plant in the suburban mountain contained 13.00~30.00 ㎎/l of Copper Cu(Ⅱ), but Cadmium and Lead were not detected. (2) The maximum removal efficiency by the chlorophyll of Cd , Cu , and Pb was occurred at pH 8.0~8.5(44.00~68.40%), pH 6.0~8.5(69.52~97.82%) and pH 7.0~8.5(84.60~99.80%) respectively and The Net Removal Efficiencies of wiout hydroxide-precipitation effect of Cd , Cu , Pb were 36.20% (pH=8.5), 63.61% (pH=7.5), 50.60% (pH=6.0) respectively. (3) In the experiments about the effect of metal/chlorophyll concentration ratio on the RE , RE of CD was 51.60~88.40% when Cadmium/chlorophyll ratio (Cd[㎎/l]/chlorophyll[㎎/l]) was 0.10~0.50, and the maximum RE of Cd was obtained at optimum ratio, 0.16, RE of Cu was 94.36%~96.88% when Cu/chlorophyll ratio was 0.16~1.0 and optimum ratio was 1.0, and not less than 95% of Pb was removed at the same ratio range with Cu , and optimum ratio of Pb was 0.5. (4) In the experiments about the effect of pH on the heavy metal RE of dry-leaf powder under the pH 2.0~13.0, the maximum Re of Cd , Cu Pb were 59.26% (pH=8.5), 55.60% (pH=8.5), and 96.12% (pH=8.0) respectively. (5) In the experiments about the effect of dry leaf powder on the RE of heavy metals, under the natual water condition of pH 7.0, 57.74% of Cd and 13.00~23.60% of Cu and 82.50~89.56% of Pb were removed when 0.5~6.0 gm of dry leaf powder were added.
오존처리에 의한 Bromate의 생성이 고환독성에 미치는 영향
이무강,정운용,정민화,한갑이,조희숙,최종원 慶星大學校 環境問題硏究所 2002 環境硏報 Vol.12 No.1
Bromate is a chemical oxidizing agent that has been used in analytical chemistry, in four milling, in beer malting, in cheese making, as a component of home and salon permanent hair-wave kits. In this study the objective was to investigate the effects of testis toxicity due to bromate in rats. On the biological study, the body weight changes, bromate(0, 0.1, 0.2, 0.4g/L) treated group showed decreased in the body weight and testis compared to the normal group. But kidney weight was increased. Hepatic and spleen weight were not effected compared to the normal group. Lipid peroxide content in the testis was increased by bromate which was concentrated 0.4g/L for 24 weeks. Testis cytosolic enzyme system(xanthine oxidase, aldehyde oxidase) of bromate group were significantly increased in comparison with those of normal group and microsomal enzyme system were not effected. And blood testosterone concentration was significantly decreased in comparison with those of group given bromate.
曺秉樂,李種達,朴永圭,李哲熙,李武康 嶺南大學校 環境問題硏究所 1981 環境硏究 Vol.1 No.1
In this study, a method of treating waste water from the Bisan Dyeing Industry complex has been developed. This process will be used as a model for treating waste water from the future large-scale dyeing industy complex. If the concentrated dyeing waste water may be seperated from the scouring waste water the C-2 process is the most economical to treat the concentrated dyeing waste water first by the coagulation precipitation process and the scouring waste water mixed with the effluent of coagulation precipitaion next by the activated sludge process. When it is impossible to seperate the concentrated dyeing waste water from scouring water for the Biasn Dyeing Industry complex, the B-2 process treating by the activated sludge process following coagulation precipitation with alum can be applied.
朴永圭,李哲熙,李武康 嶺南大學校 環境問題硏究所 1982 環境硏究 Vol.2 No.1
This studies provided the optimization for the design treating activated sludge process for the waste water from the large-scale dyeing industrial complex. Two processes were here used to treat the dyeing waste water, which one is treated with raw waste water directly by the activated sludge process and the other treated by the coagulation follwing with activated sludge process. Design parameters as maximum specific substrate utillization rate(??) and half velocity coefficient (??) were obtained for each process. And also discussed the optimization conitions for the design of the activated sludge process with these parameters.