回轉圓板에 依한 窒酸化에 關한 硏究

諸元穆,鄭渭得,金冕燮 漢陽大學校 環境科學硏究所 1989 環境科學論文集 Vol.10 No.-

回轉圓板을 利用하여 COD除去와 室酸化를 同時에 效率的으로 達成하기 위하여 일련의 實驗을 行하였다. 回轉圓板에서 박리시킨 Sludge를 현탁 狀態에서 利用하여 室酸化에 미치는 pH의 影響을 檢討하였으며, 最適 pH값은 7.5∼8.5이었다. 많은 量의 酸素供給에 依해서도 室酸化는 增加되지 않았으며, 그 까닭은 놓은 COD負荷條件下에서 COD를 利用하는 微生物君에 依해 두꺼워진 生物膜이 室酸化에 必要한 酸素와 基質移動을 制限한 때문인 것으로 推定되었다. 回轉圓板을 利用한 室酸化를 爲해서는 COD負荷는 0.027㎎/㎝²·hr以下로 制限되어야 하고, 또 높은 COD와 無機室素를 合有하는 廢水의 處理에는 多段 System이 適用되어야 한다는 것을 알 수 있었다. Rotating biological disc contactor system was used in order to accomplish the COD removal and nitrification simultaneously in one step. The effect of pH on nitrification rate was examined in a suspended growth system, using microorganism scraped from the rotating discs, and an optimum pH value was between 7.5 and 8.5. Nitrification was not accompanied by a large amount of dissolved oxygen supplied in the system. This might be attributed to the inreased thickness of the COD-utilizer-biofilm limited oxygen and substrate transfer for nitrification under high COD loading. It was found that the COD loading must be reduced to below 0.027㎎/㎝²·hr, for nitrification to occur in the rotating disc system, and that a multi-stage system could improve the treatment of waste water containing both high COD and inorganic nitrogen.

금속도금공장 폐수중의 구리 및 시안화물의 효과적인 처리방법

諸元穆,洪鍾斗,金冕燮 漢陽大學校 環境科學硏究所 1988 環境科學論文集 Vol.9 No.-

구리 및 시안화물이 혼합된 도금폐수를 적절하게 처리하는 방법을 알기 위하여 pH,농도 및 접촉시간에 따르는 용액중 구리 및 시안화물의 제거율을 실험하였다. 그 결과 시안화물은 5% NaOC1용액으로 처리하면 잔류시안 농도가 0.03 ㎎/ℓ이하로 환경배출기준에 적합하였다. pH에 따르는 영향은 pH8 이상에서 99%제거율을 나타냈다. 구리혼합용액은 중화침전법으로 실험한 결과 pH8에서 99%가 짧은 시간에 제거되었다. 시안화물과 구리혼합용액의 pH에 따르는 제거율은 pH8 및 11에서 높은 제거율(95%이상)을 보였으며 pH10에서 제거율이 떨어지는 결과를 얻었다. To investigate the effective removal method of copper and cyanide compounds in metal plating waste water, removal ratio of copper and cyanide compounds in solution are measured with varying pH, concentration and contact time. As results of the present expriment, cyanide compounds in the solution are removed to 0.03 ㎎/ℓ or less with 5% NaOC1 solution. The present result is satisfied to environmental disposal standards. The removal ratio against pH values show 99% over pH8. As results of neutral precipitation method, copper including solution are removed to 99% at pH8 in short time. The removal ratios of cyanide mixed copper solution against pH values show high efficiency(over 95%) at pH8 and 11 and removal ratios are decreased at pH10.

여러 고분자물질 및 초자에 대한 이트륨-90의 흡착특성 연구

이철,제원목,신태호 漢陽大學校 環境科學硏究所 1989 環境科學論文集 Vol.10 No.-

무담체 동위원소 Y-90의 흡착특성이 연구되어왔다. 본 연구에서는 용액에서 여러종류의 plastic과 유리의 표면에 대한 흡착이 시간과 다양한 pH값에 따라서 연구되었다. 그결과, 흡착은 1시간내에 평형에 도달했다. 어떤 종류의 실험물질이든지 최대이은흡착은 pH 6∼7사이에서 일어났으며 수산화나트륨의 농도를 증가시킴에 따라 pH 8∼9사이에서 두 번째의 최대흡착이 일어났다. 흡착과정은 Y의 이온성흡착, Y-90수산화물의 정전기적 물리적흡착, Y(OH)₃ 방사성 콜로이드의 정전기적흡착에 의해 각각설명되었다. The adsorption characteristics of carrier-free yttrium-90 have been described. The adsorption on the surface of several kinds of plastics and glass was studied in solutions with time and various pH values. As a result the adsoption reached equilibrium within 1 hour. The maximum ionic adsorption of carrier-free yttrium-90 on any kind of material tested was obserbed at pH 6∼7.Another type of maximum adsorption appeared at a pH value of about 8∼9 with an increase in the concentration of sodium hydroxide. The observations were explained on the basis of ?? ionic adsorption, electrostatic and physical adsorption of Y(Ⅲ) hydrolysis products, and electrostatic adsorption of radiocolloidal Y(OH)₃, respectively. The studies include an adsorption on the surface with yttrium-90 concentrations.

중성자 방사화분석에 의한 조선시대 청·백자 분류연구

姜炯台,李澈,諸元穆 漢陽大學校 環境科學硏究所 1989 環境科學論文集 Vol.10 No.-

조선시대 자기의 특성화를 위하여 중성자방사화분석법으로 15개의 미량성분원소 (Sm,Ga,K,La,Ce,Yb,Th,Hf,Na,Cs,Sc,Rb,Fe,Co,Eu) 함량을 결정하였다. 데이타의 수학적 처리법으로서 선형판별식분석법을 사용하였다. 이 선형판별식분석법으로서 자기의 분류에 유용한 변수를 선정한 다음 재차 선형결합방식으로 분류규칙을 구하였다. 판별점수로서 평면상에 도시한 결과 경기도 광주군 상번천리5호, 상번천리9호 및 도수리 청·백자의 분류효율은 각각 12/15,15/15,10/10이었다. Data on the concentration of Sm,Ga,K,La,Ce,Yb,Th,Hf,Na,Cs,Sc,Rb,Fe,Co and Eu obtained by neutron activation analysis have been used to characterize Korean porcelain by multivariate analysis. A combination of analytical data by means of statistical linear discriminant analysis(SLDA) has resulted in removal of redundant variables, optimal linear combination of meaningful variables and formulation of classification rules. The plot in the first-to-second discriminant scores has shown that the three distinct territorial regions exist among porcelains of Kyungkido Sangbunchulli No. 5, Sangbunchulli No. 9 and Dosuri, with respective efficiencies of 12/15,15/15 and 10/10.

폐렴 구균(Streptococcus pneumoniae)에 의한 척수 경막외 농양 1예

이지영,위유미,손경목,기현균,문치숙,오원섭,백경란,송재훈 대한감염학회 2004 감염과 화학요법 Vol.36 No.6

폐렴구균은 보통 폐렴이나 뇌막염을 일으키는 균으로 척수 경막외 농양을 일으키는 경우는 매우 드물다. 본 저자들은 폐렴 구균에 의한 척수 경막 외 농양을 경험하여 보고하는 바이다. 과거 건강했던 36세 남자 환자로 사다리에서 낙상한 후 요통 및 고열, 신경학적 이상으로 내원하여 자기 공명 촬영 결과 척수 경막 외 농양으로 진단받고 항균제 투여와 함께 응급 수술을 시행하였다. 농 배양 결과 페니실린 감수성인 폐렴 구균이 분리 되었고, 수술 요법과 항생제 투여 후 농양은 치유되었으나 신경학적 이상은 호전 없는 상태로 타원으로 전원되었다. Pneumonia and meningitis are the most frequent manifestations of pneumococcal infections. Pneumococcal spinal epidural abscesses have been rarely reported. Spinal epidural abscess by Streptococcus pneumoniae has been diagnosed among the patients with diabetes mellitus, alcoholism, corticosteroid therapy, intravenous drug use, chronic renal failure, AIDS, and history of spinal surgery. Recently, we experienced a case of pneumococcal spinal epidural abscess after spinal trauma. A 36-year-old male patient was admitted with back pain, fever, and paraplegia which occurred 5 days after the trauma. Spine MRI revealed spinal epidural abscess at the level from T2 to T9. He was treated with antimicrobial agents and surgical exploration for spinal epidural abscess. Pus culture grew S. pneumoniae which was susceptible to penicillin. Despite early surgical treatment, neurologic sequelae remained. Considering the high mortality and morbidity of pneumococcal spinal epidural abscess, early diagnosis and aggressive treatment including surgical intervention and antibiotics therapy should be implemented immediately.

Postoperative surveillance for recurrence after curative resection for gastric cancer and its benefit

Jae-won Shin,You-Jin Jang,Jong-Han Kim,Sung-Soo Park,Seung-Heum Park,Seung-Joo Kim,Chong-Suk Kim,Young-Jae Mok 대한외과학회 2009 대한외과학회 학술대회 초록집 Vol.2009 No.11

우라늄系列 非平衡 年代測定法과 韓半島 南海 上白島 現生 堆積層의 年代測定에 關한 硏究

Won Mok Jae(諸元穆),Chul Lee(李澈),Keung Shik Park(朴肯植),Seung Whan Choo(朱昇煥) 대한자원환경지질학회 1985 자원환경지질 Vol.18 No.3

Uranium-thorium separation technique from shallow sediment and α-source electrode-position technique are established in the present work, and uranium series disequilibrium dating method is applied to the quaternary piston core from Sangback-do, South Sea of Korean Peninsula. The age of the piston core (depth 200~300cm) sampled from Latitude 34°06′37″, Longitude 127°37′37″ was determined as ranging from 9.0±2.2 to 22.9±3.3Ky B.P, i.e., Later Pleistocene, older than Holocene which was stratigraphically known in the previous study. The sedimentation rate in the area is regularly increased according to the depth of the sedimentation layer. Except a few split sections of the piston core the sedimentation rates are avarage 7.2cm/1,000 years. Where sedimentation layer is deeper, then sedimentation rate tend to be slower. It must be pointed in age calculation that initial ²³⁰Th/²³⁴U radioactivity ratio is much influenced when detrital material was introduced in the sample. The ²³⁰Th/²³⁴U activity ratio measured in the present work is 0.06 at ²³²Th=0, and this value shows higher analytical errors because of the low-radioactivity of ²³⁰Th in the samples.

States of Am in Aqueous Solution

Won Mok Jae Korean Nuclear Society 1982 Nuclear Engineering and Technology Vol.14 No.4

pH변화 5~10 범위에서 $10^{-5}$M Am 수용액의 상태를 여과법 및 인심분리법에 의하여 조사하였다. 이 실험에서 Am의 가능한 가수분해 생성물 및 용해도 상수를 추정할 수 있었다. 이때 Baes 및 Mesmer에 의하여 이론적으로 계산한 Am(OH)$_3$의 용해도를 약 10배 증가하면 즉 log k=-18.7를 log k=-17.5로 변화시키면 계산에 의한 PH변화에 따른 Am농도곡선은 실험치와 완전히 일치하였다. The state of Am in the concentration of 10$^{-5}$M has been studied in the pH range of 5 to 10 by filtration and centrifugation method. By the experiments, we could estimate possible Am hydrolysis products and solubility constants. If the solubility of Am (OH)$_3$ estimated by Baes and Mesmer is increased about a factor of 10, i.e. changing logk=-l8.7 to logk=-17 5 it was found that the calculated curve of Am concentration versus pH agreed completely with experimental values.

State of the Saturated Solution of Insoluble Salts(Ⅰ)-Yttrium Hydroxide

Jae, Won Mok 漢陽大學校 1977 論文集 Vol.11 No.-

수산화이트륨의 포화용 상태를 방사성이트륨-90을 이용하여 조사하였다. 수산화이트륨 침전물의 존재하에 용액의 농도희석과 pH에 따르는 포화용액의 이트륨 농도를 측정한 결과??가 농도희석에 따라 변동하였다. ??값은 수산화이트륨의 농도(Moles of Y(OH)₃/Total volume of solution)에 비례하고 Y(OH)₃침전만이 존재할 때 ?? 값이 정의됨을 알았다. 이트륨이온의 침전기구는 용액중에 존재하는 불순물에 의한 흡착으로 설명하는 것이 타당함을 알았다.

The Behavior of Microamounts of Americium in Aqueous Solution

Jae, Won-Mok Korean Nuclear Society 1986 Nuclear Engineering and Technology Vol.18 No.3

The behavior of micro amount of Am in aqueous solution were investigated with centrifugation method as a function of pH. In the studies described here, equilibration times were extended to 2-3 weeks to know the aging effect in radiocolloid formation. Also, the effect of the addition of foreign materials, e. g. silica gel and Fe$^{3+}$ were examined as well as the effect of presence of concentrated electrolyte. In the results, Am appeared to be rapidly adsorbed on to impurity particles for pH < 6 and probably on the container walls by an ionic sorption process. The addition of foreign material increased the fraction of Am while the addition of concentrated electrolyte hindered the process. For pH > 7 Am behaved quite differently than for pH < 6. There appeared to be rapid sorption of some Am from solution probably on the container walls followed by partial desorption that occurred over a period of 1-2 days.s.