Chemical Effects of Nuclear Transformations in Metal Salts

이병헌,이종두,Byung Hun Lee,Jong Du Lee Korean Chemical Society 1975 대한화학회지 Vol.19 No.5

크롬산염, 중크롬산염, 요오드산염 및 과요드산염의 중성자포획에 수반하는 크롬-51 및 요오드-128 반조 화학종의 분배를 거름종이 전기영동법으로 검토하였다. 유효반조에너지 및 내부전환의 관점에서 생각하면 중성자 포획원자가 초기분자중에 잔유하고 반조원자에너지가 결정의 적은 범위를 가열하며 소멸된다고 하기 어렵다. 그러나 거름종이 전기영동결과 더 많은 크롬-51 및 요오드-128 반조원자가 어미분자와 결합되어 있음을 알 수 있었다. 잔류율의 관찰결과 반응 이론을 Disorder Model로 설명하였다. 양이온 반경이 클수록 2차 cage를 돌파하는 반조원자의 확율이 높다. 암모늄염중 암모늄이온은 disorder zone에서 환원작용을 하며 잔류율이 낮어졌다. 결정구조에서 자유공간이 크면 잔류율이 낮어졌다. The distribution of $^{51}Cr\;and\;^{128}I$ recoil species following radiative-neutron capture in chromates, dichromates, iodates and periodates has been investigated by using paper-electrophoresis. In view of the effective recoil energy and the effect of the internal conversion, it is unlikely that an atom which has captured a neutron can remain bound in its original molecule. It is also unlikely that the energy of the recoil atom is dissipated in heating a small region of the crystal. However, the results of paper-electrophoresis separation of recoil $^{51}Cr\;and\;^{128}I$ indicated that many more of the recoil atoms were bound in the parent molecule. The disorder model for the reaction was proposed from observations of retention. In considering cations, the greater their radii, the higher is the probability of the recoil atom breaking through the secondary cage. In ammonium salt, the ammonium ion behaved as a reducing agent in the disorder zone and resulted in low retention. Crystal structures with their greater free space have shown low retention.

Chemical Effects of Nuclear Transformations in Metal Permanganates

이병헌,김봉환,Lee, Byung-Hun,Kim, Bong-Whan Korean Association for Radiation Protection 1986 방사선방어학회지 Vol.11 No.1

금속 과망간산염 즉 과망간산칼륨, 과망간산나트륨, 과망간산은, 과망간산바륨, 과망간산암모늄에서 망간의 중성자 포획으로 야기되는 화학적 효과를 고찰하였다. 생성된 방사성 망간의 분포는 각종 흡착제 및 이온교환체 즉 이산화망간, 알루미나, 제올라이트 A-3, 카올리나이트, 도엑스 -50을 사용하여 결정하였다. 각종 흡착제 및 이온교환체에 대한 방사성 망간의 분포는 각 과망간산염에 대하여 거의 유사한 결과를 갖는다. 방사성 망간의 친화력은 도엑스 -50이 가장 크다. 잔류율의 현저한 증가가 열-어니일링을 통하여 나타나며 잔류율은 각 과망간산염의 금속이온의 제 1차 이온화 전위에 의존한다. The chemical effects resulting from the capture of the thermal neutrons by manganese in different crystalline permanganates, that is, potassium permanganate, sodium permanganate, silver permanganate, barium permanganate and ammonium permanganate, have been investigated. The distribution of radioactive manganese formed has been determined by using different absorbents and ion-exchangers, that is, manganese dioxide, alumina, Zeolite A-3, Kaolinite and Dowex-50. The distribution of radioactive manganese in various adsorbents and ion-exchangers has almost similar result for each permanganate. The affinity for radioactive manganous ion is greatest for Dewex-50. A significant increase of retention is shown through the thermal annealing and the retention depends on the first ionization potential of metal ion in permanganates.

UASB 반응조에서 수리학적부하와 유기물질 부하 및 기질농도가 처리효율 및 입상슬러지 특성에 미치는 영향

이병헌,정몽규 ( Byung Hun Lee,Mong Kyu Jeung ) 한국폐기물자원순환학회(구 한국폐기물학회) 1994 한국폐기물자원순환학회지 Vol.11 No.3

병렬 부하를 갖는 DC배전 시스템을 위한 Voltage Bus Conditioner의 향상된 적응제어

이병헌(Byung-Hun Lee),장한솔(Han-sol Chang),나재두(Jae-Du La),김영석(Young-Seok Kim) 전력전자학회 2011 전력전자학술대회 논문집 Vol.2011 No.11

Ag-TiO₂ 광촉매 공정을 이용한 Fulvic acid의 제거

이병헌 ( Byung-hun Lee ),김민경 ( Min-gyeong Kim ) 한국수처리학회 2017 한국수처리학회지 Vol.25 No.1

This study is to remove fulvic acid of natural organic matters(NOMs) that existed in water and polluted in the water system. Fulvic acids show a high reactivity towards chlorine and make trihalomethanes in water treatment. The optimum conditions for the removal of natural organic matters were investigated using photocatalytic oxidation, which is and advanced oxidation process. For the more effective photocatalytic reaction than the conventional photocatalytic reaction, Ag was added and the experiment was conducted. Response surface methodology (RSM) was used to find the appropriate amount of Ag injection. Fulvic acid was selected as Natural Organic Matter(NOM). TiO₂ was fixed to the reactor at 300 g/L and a UV lamp with a wavelength of 254 + 185 nm was used in the experiment. Experiments were conducted under the conditions of Ag of 0.15 - 5.8 g / L, reaction time of 10 - 70 min, and irradiation density of 9.5 - 13.7 W / L. Experimental results showed that the optimum removal rate was Ag 3.5 g/L, irradiation density 13 W/L and reaction time 50 min.

외부탄소원 주입시 영양염류의 생물학적 제거를 위한 자동제어 SBR 공정에 관한 연구

이병헌 ( Byung Hun Lee ),강성재 ( Seong Jae Kang ),임성일 ( Sung Il Lim ),유평종 ( Pyung Jong Yoo ) 한국물환경학회 2002 한국물환경학회지 Vol.18 No.4

The purpose of this study is to develop effective operating process in order to achieve more suitable conditions of Anoxic-Oxic-Anoxic-Stripper(AOAS) SBR through real-time control. To improve the removal efficiency, glucose, methanol and synthetic food waste acid fermentant were added as an external carbon source, In the case of glucose and synthetic food waste acid fermentant, TN, TP were removed to average 86.9%, 73.0% respectively. Methanol was removed to average 64.6%, 55.4% respectively. The synthetic food waste acid fermentant proved to be the most efficient and allowed for the substitution of an external carbon source. The removal rate of COD_Cr, was approximately 90% at all cases. The results of the study that a correlation between ORP (Oxidation- Reduction Potential), pH and DO and nitrification or denitrification when an external carbon source is added and when it isn`t was showed that ΔORP is suitable parameter. ORP reacted properly to denitrification (ΔORP < -10) and nitrification (ΔORP <0). The use of real-time control saved anywhere between 61 and 67 minutes at the anoxic(1) stage and 26 to 52 minutes at the oxic(1) stage. When the time saved from the anoxic(1) and oxic(1) was added to the anoxic(2) stage for the removal efficiency of TN and TP increased from 0.7 to 13.9% and 12 to 35 % respectively.

병렬 펄스 부하를 갖는 직류 전력시스템을 위한 Voltage Bus Conditioner의 전류 센서 없는 제어

이병헌(Byung-Hun Lee),장한솔(Han-Sol Chang),나재두(Jae-Du La),김영석(Young-Seok Kim) 대한전기학회 2012 전기학회논문지 Vol.61 No.11

A DC power system has many loads with varied functions. Also, there may be large pulsed loads with short duty ratios which can affect the normal operation of other loads. In this paper, Voltage Bus Conditioner(VBC) without any current sensors is proposed to damp the bus voltage transients by parallel pulsed loads. The proposed control approach requires only one voltage sensor and carries out both the functions of damping the bus voltage transients and maintaining the level of energy stored. The proposed control technique has been implemented on a TMS320F2812 Digital Signal Processor(DSP). Simulated results by a Matlab Simulink and experimental results are presented which verify the control principles and demonstrate the practicalty of the approach.

하수처리 : 하수관거 내의 오염물질 변화 특성모델

이병헌 ( Byung Hun Lee ),김광재 ( Kwang Jai Kim ),황은주 ( Enu Ju Hwang ) 대한상하수도학회 2007 공동추계 학술발표회 논문집 Vol.2007 No.-

오정희 소설의 문체

이병헌 ( Byung Hun Lee ) 우리어문학회 2006 우리어문연구 Vol.27 No.-

This is an attempt to study on the style of Oh Jeong-Hee`s novel. With the help of text linguistics, I set up the two dimensional standards which are `presentation and expression` according to the functions of sentences and `moderation and emission` according to the aspects of subject treatment, and looked into the characteristics of each style. As for the styles classified by the function of sentence, the style of `presentation` is to write at a distance from the emotion, feeling and intention of the text maker or writer in describing the story, background and events of the novel and the characters` psychology. Whereas the style of `expression` gives priority to the manifestation of the feeling and attitude of the writer and to the dealing with the text maker as a subject matter over the uninvolved neutral writing. So the phrase which is intruded by the writer`s judgement and the sentence which has the device that attracts the reader`s attention are the style markers of the `expression`. The style of Oh Jeong-Hee`s novel comes under the style of `expression` according to the classification by the function of sentence. `Materialization and personification`, `application of grotesque image`, `mingling of imagination and reality`, and `use of long modification including dual modification` in Oh Jeong-Hee`s novel belong to the style markers of the `expression`. As for the style classified by the aspects of subject treatment, the style of `moderation` is the statement and expression which restrains the desire for using words and keeps the virtue of harmony and proportion in managing the subject of the novel. It`s influence reveals when it shows the circumstances explicitly and makes clear the message that the writer wish to convey through a few proper words. The style of `emission` is the narrator`s attitude of saying freely and fully what he want to say in easy and relaxed state with confidence. It is the style in which any circumstance and psychology is told fully by means of the rhetorical devices and the effect of communication can reach to the maximum by means of eloquence, pungent colloquialism or unconstrained sentence. According to the classification, the style of `emission` prevails in the style of Oh Jeong-Hee`s novel though the styles of `moderation` and `emission` are properly balanced. `Exhibition of playing with idea`, `allowance of continuous rhythmic sense` and `descriptive statement` belong to the style markers of the `emission` in Oh Jeong-Hee`s novel.

하수처리장에서의 도시지역 비점오염원 부하량의 산정 1. 강우시 하수처리장 유입수 산정을 위한 SWMM 매개변수 추정

이병헌 ( Byung Hun Lee ),정창욱 ( Chang Wook Jung ),김정숙 ( Jeong Suk Kim ) 한국수처리학회 2011 한국수처리학회지 Vol.19 No.4

Main objectives of sewer system are flood disaster prevention by storm water exclusion and water quality preservation by sewage exclusion. At wet weather periods, the quantity and quality of wastewater treatment plant influent is variation by rain. The influent characteristics of wastewater treatment plant are very important factors of the wastewater treatment plant operation. If we want to estimate nonpoint source pollution of wastewater treatment plant, we need to know the influent characteristics of rainy seasons. Mike SWMM(stormwater management model), Mike Urban, XP-SWMM based SWMM(US EPA) are used for simulation of the wastewater treatment plant influent characteristics. The parameters estimation methods for the quantity simulation of SWMM were well developed. But, the parameters estimation methods for the wastewater quality characteristics by SWMM simulation is increasing interest recently. This study used surface response analysis method for the parameters estimation for the quality simulation of SWMM. Which method can save the times and get the same answers of every trial. The optimum parameters value of SWMM for influent concentration of wastewater treatment plant are as following. For BOD concentration, the maximum buildup is 1.0, time exponential is 0.03, washoff coefficient is 0.8 and washoff exponential is 2.0, respectively. For TN concentration, maximum buildup is 2.2, buildup rate is 0.88, washoff coefficient is 0.46 and washoff exponential is 0.9, respectively. For TP concentration, maximum buildup is 0.55, buildup rate is 0.40, washoff coefficient is 0.19 and washoff exponential is 0.99, respectively.