• 한국지반환경공학회 논문집
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• 제2권3호
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• pp.17-35
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• 2001

본 연구에서는 자연점토에 납, 구리, 아연, 카드뮴의 단일 흡착 시 온도변화에 따른 흙의 구성성분별 흡착거동을 살펴보기 위해 혼합 흡착-연속추출법(combined adsorption-sequential extraction analysis, CASA)을 사용하였다. 실험결과 납과 구리의 경우 약 50%이상의 분배가 탄산염 형태로 나타났고, 카드뮴의 경우 약 80%이상의 분배가 이온교환 형태로 나타났다. 아연의 경우 $25^{\circ}C$이하의 온도에서는 이온교환 형태로의 분배가 약 60%로 나타났고, $40^{\circ}C$이상의 온도에서는 탄산염 형태로의 분배가 50%이상으로 나타났다. 흙의 각 구성성분에 대한 흡착용량의 온도에 따른 영향은 철.망간 산화물과 유기물 형태에서 주로 발생하는 것으로 나타났다. 또한 이온교환 형태를 제외한 모든 형태에 대한 중금속들의 흡착 반응은 온도의 증가에 따라 흡착량이 증가하는 흡열반응(${\Delta}H^0$ >0)인 것으로 나타났다.

• 한국수산과학회지
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• 제8권2호
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• pp.85-89
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• 1975

바지락의 가공적성을 판정하기 위한 기초자료를 얻기 위하여, 삼천포 대포리 바지락 양식장의 3년생 바지락에 대하여 1973년 3월부터 1974년 4월까지 수은, 납, 구리, 카드뮴의 함양을 월별로 정량하였다. 수은, 납, 구리, 카드뮴 모두 시기적으로 증감이 심하였고 대체적으로 보아 여름철에 중금속함량이 높은 경향이었다. 시기적인 변화범위를 보면 총수은은 $0.003\~0.038ppm$ 로서 평균 0.018ppm, 남은 $0.096\~0.921ppm$로서 평균 0.445 ppm, 구리는 $0.023\~0.139ppm$서 평균 0.074 ppm, 카드뮴은 $0.009\~0.038ppm$로서 평균 0.023 ppm이므로 가공원료로서 안전하다는 결론을 얻었다.

• 한국산업보건학회지
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• 제1권1호
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• pp.82-88
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• 1991

Determination of Cu, Fe, Ni, Pb, and Zn concentrations in coal and respirable coal dust were performed by atomic absorption spectrophotometry. The coal samples of 18 coal mines in Gangneung area were collected and 25 coal mines in Taebaek area. Crushed coal samples were divided into three mesh sizes. The results were as follows : 1. Metal concentrations of coals in Gangneung area by sieve sizes( -100/+200 mesh, -200/+325 mesh, -325 mesh) were as follows: Cu ; 20, 18, 19, Fe ; 1,830, 1,765, 1,107, Pb ; 6, 8, 14, Ni ; 17, 17, 14, Zn ; 4, 2, $4{\mu}g/g$, respectively. Metal concentrations in coals in Taebaek area by sieve sizes(-100/+200 mesh, -200/+325 mesh, -325 mesh) were as follows: Cu ; 30, 32, 26, Fe ; 1,741, 1,822, 1,773, Pb ; 8, 9, 7, Ni ; 13, 13, 13, Zn ; 8, 5, $4{\mu}g/g$, respectively. There were not significant differences of Cu, Fe, Ni, Pb, and Zn concentrations of coals statistically in Gangneung and Taebaek area by sieve size. 2. Metal concentrations of coals in Gangneung and Taeback area were as follows : Cu ; 19, 30, Fe ; 1,514, 1,778, Pb ; 9, 8, Ni ; 16, 13, Zn ; 3, $6{\mu}g/g$, respectively. Differences of copper and zinc concentrations of coal samples were significant between Gangneung and Taebaek area, but those of iron, nickel and lead concentrations were not significant. 3. Copper, iron, lead, nickel and zinc concentrations of coals and respirable coal dust were as follows : Cu ; 30, 6, Fe ; 1,779, 5,075, Pb ; 8, 7,814, Ni ; 13, 5,681, Zn ; 5, $134{\mu}g/g$, respectively. Differences of nickel, lead and zinc concentrations were significant between coals and respirable coal dust but those of copper and iron concentrations were not significant.

• 한국콘텐츠학회논문지
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• 제14권2호
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• pp.457-466
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• 2014

고 에너지 전자선 치료에 있어서 차폐물질은 종양조직 외 정상조직이나 주요장기를 보호하기 위해 사용된다. 하지만 이러한 물질에서 발생되어지는 산란선은 심부선량에 영향을 줄 수 있으며, 물질원자번호에 따라 다르게 나타난다. 이에 차폐물질로써 사용가능한 알루미늄, 구리, 납 등의 다양한 원자번호 물질을 전하 감약율 95% 되는 두께로 하여 측정과 MCNPX 모의계산으로 산란율을 비교분석하였다. 산란선 영향을 많이 받는 표면의 선량변화율은 최대 물질두께에서 +0.88%, 원자번호에서 +0.43%의 영향을 받으며, 전하 감약율 95% 되는 두께의 알루미늄, 구리, 납 물질은 측정에서 +19.70%, +15.20%, +12.40% 계산에서 +25.00%, +15.10%, +13.70%를 보였다. 이로 인해 산란율은 물질두께가 원자번호보다 많은 영향을 주며, 산란전자가 광자보다 많은 기여를 하고 있음을 알 수 있었다. 이에 임상에서의 적절한 차폐물질은 두께영향 산란선이 적게 방출되는 고 원자번호물질이 적당하다고 사료된다.

• 자원환경지질
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• 제39권2호
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• pp.103-109
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• 2006

Sphagnum 피트모스에서의 Cd(II), Cu(II) Pb(II)의 흡착에 대한 회분식 실험을 수행하였다. 실험결과 10-50 mg/L의 Cd(II), Cu(II), Pb(II)이 1.0 g/L의 sphagnum 피트모스에 1시간 내에 흡착되어 효과적으로 제거되었다. 초기농도에 따라 sphagnum 피트모스에 홉착된 Cd(II), Cu(II), Pb(II)의 반응속도는 유사이차 반응모델을 적용하여 설명하였다. 또한 Langmuir 등온흡착으로부터 Cd(II), Cu(II), Pb(II)에 대한 최대흡착량을 계산하여, 각각 33.90, 29.15, 91.74 mg/g가 sphagnum 피트모스에 흡착될 수 있음을 알아내었다. Sphagnum 피트모스가 Cd(II), Cu(II), Pb(II)를 흡착하는데 매우 효과적인 흡착제임을 실험결과를 통해 나타내었다.

• 환경위생공학
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• 제10권2호
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• pp.46-58
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• 1995

Acute toxicity of heavy metals( Mercury, Cadmium, Lead, Chromium and Copper ), Organophosphorus insecticides( EPN, 2, 4- D, and Parathion ), and other chemicals( Arsenic, Cyanide, and Phenol) to Daphnia magna, and Vibrio fischeri was analysed. Daphnia magna to most toxic chemicals was most sensitive among test organisms alld then Daphnia magna seems to be more useful in toxic test of water. Daphnia magna was more sensitive to heavy metals than insecticides and other chemicals. The sensitivity of Visrio JircAeri to heavy metals was not so different from that to insecticides and the sensitivity to other chemicals was low. Visrio JircAeri appears to be more sensitive to toxic chemicals than Photobacterium phosphoreum, which was compared as recorded values of P.phosphoreum. Toxic chemicals were classified as Group 1 which had a high $EC_{50}$ or $LC_{50}$ value and the low increase rate of toxicity according to the increase of concentration, Group 2 which had a high $EC_{50}$ or $LC_{50}$ value and the high increase rate of toxicity, Group 3 which had a low $EC_{50}$ or $LC_{50}$ value and the high increase rate of toxicity, and Group 4 which had a low $EC_{50}$ or $LC_{50}$ value and the low increase rate of toxicity. To Daphnia magna, Lead, Chromium EPN, and Parathion were included in Group 1 : Mercury and Copper in Group 2 : Arsonic and Cadmium in Group 3 : Cyanide, 2, 4-B, and Phenol in Group 4. To Visrio JircAeri, Lead, Chromiurl 2, 4- D, and Parathion were included in Group 1 : Merecury, Cadmium and Arsenic in Group 2 : Cyanide in Group 3 : EPN, Copper, and Phenol in Group 4.

• 약학회지
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• 제25권3호
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• pp.89-99
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• 1981

This study was performed to investigate the contamination level of heavy metals in freshwater flshes. The samples of 92 cases were collected at 7 areas located on HanRiver from November to December in 1980. Contents of heavy metals: cadmium, lead, copper, chromium and zinc were analyzed by atomic absorption spectrophotometry. The results were as follows: 1. Generally mean value of the heavy metal contents of fishes collected on lower parts of Han River were higher than those of upper parts. 2. In the cadmium contents, the highest value was $20.52{\pm}5.10$ ppb in Carassius auratus, and the values at Hannam and Noryangjin area were higher than those at other parts on Han River. 3. In the lead contents, the highest was $0.29{\pm}0.03ppm$ in Carassius auratus and that in Parasilurus asotus was the lowest $0.12{\pm}0.02ppm$ Mean contents of lead in the samples of Hannam and Haengjue area were higher than those of other area 4. In the copper contents, the highest value was $3.13{\pm}0.34ppm$ in Carassius auratus and the contents of fishes of Haengjue area was higher than those of any other area. It was significant among the species, but not among the collecting areas in copper contents. 5. In the chromium contents, the highest was $1.16{\pm}0.12ppm$ in Carassius auratus and that in Parasilurus asotus was the lowest $0.21{\pm}0.01ppm$ The contents of samples of Hannam and Noryangjin area were also higher than those of other area. 6. In the zinc contents, that in Arassius auratus was the highest value with $14.06{\pm}1.13ppm$ and that in Parasilurus asotus was the lowest $4.79{\pm}0.53ppm$. On the other hand, it was significant among the species and collecting areas. 7. Accumulation of heavy metals in freshwater fishes is tended to increase with growth.

• 한국지반환경공학회 논문집
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• 제14권10호
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• pp.59-64
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• 2013

화강풍화토의 풍화강도에 따른 중금속 흡착특성을 규명하기 위해 납과 구리를 이용하여 회분식 흡착실험을 수행하였다. 화강풍화토의 풍화가 진행됨에 따라 용해성이 높은 $SiO_2$, $K_2O$, $Na_2O$의 함량은 감소하며, 산화물인 $Fe_2O_3$의 함량은 증가하는 것으로 나타났으며, 강열감량과 비표면적은 증가하고 투수계수는 감소하는 것으로 나타났다. 화강풍화토의 풍화강도가 증가할수록 비표면적과 점토질 성분이 증가하므로 납과 구리의 흡착량이 증가하는 것으로 나타났다. 화강풍화토에 의한 납과 구리의 흡착속도는 1차 반응속도모델보다 2차 반응속도모델에 의해 적절하게 설명될 수 있는 것으로 나타났다.

• 한국응용약물학회:학술대회논문집
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• 한국응용약물학회 2001년도 추계학술대회 및 정기총회
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• pp.91-91
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• 2001

Nramp2, also known as DMT1 and DCT1, is a 12-transmembrane domain protein responsible for dietary iron uptake as well as metal ions such as lead, manganese, zinc, copper, nickel, cadmium, and cobalt. High expression of DMT1 increase lead uptake, and DMT1-dependent lead transport was H -dependent and inhibited by iron ions. The molecular mechanism of lead transport in CNS is as yet unknown. although interactions between iron and lead at the level of absorption have been known for some time. The process of lead uptake into astrocytes was not known yet. Nramp2 may mediate transport of heavy metal into astrocytes. We investigated whether Nramp2 mediate transport of lead into astrocytes. And we do whether Nramp2 was expressed highly by deprivation of iron in Astrocytes, and lead uptake into astrocytes was influenced by expression of Nramp2. Immortalized human fetal astrocyte(SV-FHA) cells were cultured in medium containing Dulbecco's modified Eagle's medium and treated with Deferoxamine. Northern blot analysis was done for determining mRNA level of DMT1 and lead uptake assay was done in incubation condition of pH 5.5 and 7.4.

• 한국수산과학회지
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• 제9권3호
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• pp.177-184
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• 1976

1576년 8월 11일 대조일과 8월 20일 소조일에 울산만 및 인근해역의 수은, 카드뮴, 구리, 납, 아연의 농도분포를 조사한 결과를 요약하면 다음과 같다. 1) 대조시의 수은농도는 0.00-0.20ppb에 평균 0.06ppb, 카드뮴은 0.00-1.80ppb에 평균0.22ppb, 구리는 0.83-10.60ppb에 평균 1.67ppb,남은 0.00-4.53 ppb에 평균 1.35ppb, 아연은 0.0-21.8ppb에 평균 4.4ppb였으며, 소조시에는 수은이 0.00-0.10ppb에 평균 0.03ppb, 카드뮴은 0.00-0.54ppb에 평균 0.19ppb, 구리는 0.51-2.60ppb에 평균 0.92ppb, 납은 0.00-2.21ppb에 평균 1.00ppb, 아연은 0.0-13.5ppb에 평균 3.3ppb였다. 2) 대조시가 소조시보다 각 금속의 농도범위 및 평균값이 높았고 해역별 차이도 컸다. 3) 울산항내에는 아연을 제외한 수은, 카드뮴, 만내 해역도 외양해수에 비하여 높은 편이었으나 만외해역은 일반연안 해역과 비슷한 농도를 보였다. 4) 울산항내는 대조시에 염분온도가 낮고 pH가 낮은 수질상태를 보였다. 5) 만외 해역중 온산면의 당월과 송정부근 해역이 수은, 카드뮴, 납, 아연의 농도가 인근 해역에 비해 높은 분포를 보였다.