• Title/Summary/Keyword: 중금속

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전동싸리의 생장에 미치는 Al과 Co의 영향

  • 박태규;송승달
    • Proceedings of the Korean Environmental Sciences Society Conference
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    • pp.245-246
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    • 2000
  • 콩과식물인 전동싸리를 대상으로 통제된 조건하에서 Al과 Co처리에 따른 식물체의 생장반응과 식물체내 중금속의 축적정도 및 근류의 질소고정 활성의 변화를 조사한 결과 중금속은 Co가 Al보다 높게 축적되었고, 처리 초기에는 지하부를, 장기간 처리시는 광합성 기관의 생장을 억제했는데, Co 처리는 영향이 미약하였으나, Al처리구는 다소 심각한 영향을 주었으며, 생장에 비해 질소고정계의 피해가 현저하였다. 전동싸리는 흡수된 중금속을 뿌리수준에서 조절함으로써 광합성기관으로 이동을 억제하는 중금속에 대한 생장적응을 나타내었다. 결국 전동싸리는 30ppm의 중금속 처리시 뿌리 수준에서 조절함으로써 광합성기관으로 전이를 차단하여 금속에 대한 내성 나타내었고, Al이 Co보다 심각한 영향을 미치는 것으로 나타났다.

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중금속 거동에 대한 Mn상 변화의 영향 : 인위적 조건에서의 Mn-함유 광미시료에 대한 Batch실험 결과

  • 김정연;송윤구;문지원;강진규;문희수
    • Proceedings of the KSEEG Conference
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    • pp.238-240
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    • 2003
  • 본 연구는 덕음광산 광미시료에 대한 각 pH별 중금속 거동 및 본 지역에서 중금속과 밀접한 관계를 가지는 토양광물인 Mn-함유광물의 용해도의 상관성을 규명하고자 한다. 본 연구를 통하여 Mn-함유광물의 용해도에 따른 중금속의 거동간의 상관관계를 알아봄으로서 광산 주변 지역의 지구화학적인 변화를 예측하고 오염지역 특성을 정확하게 이해할수 있도록 정보를 제공하고자 하였다. (중략)

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Comprehensive Assessment of Thermal Behavior of Heavy Metal Elements in Coal (석탄에 존재하는 중금속원소들의 고온거동에 관한 고찰)

  • 김형택;최병철;권혁보
    • Journal of Energy Engineering
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    • v.8 no.4
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    • pp.499-504
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    • 1999
  • 본 논고에서는 석탄의 화학조성, 입도 및 광물질 종류들에 따라 중금속 선분들의 고온 거동을 해석하여 대규모 석탄화력발전소의 중금속화합물 배출규제기준결정과 관련된 기초자료를 제공하고자 시도하였다. 먼저 , Sb. Ca, Pb, Ni, As, Cr, Mg, Se, Be Co, Hg,Mn, Cd Ti, Zn 등 원소들의 휘발성을 석탄에 포함된 광물질의 고온거동을 조사하여 분석한 결과 중금속물질 배출정도는 광물질들의 고온상 기체/고체 분포 여부 및 광물질들의 고온에서의 변이 과정과 밀접한 관계가있는 것으로 인식되었다. 또한 , 반응후 중금속물질들의 비산재와 슬랙에의 존재분포를 입도별로 해석하였으며, 그 결과는 EF enrichment factor를 이용하여 해석하였다.

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관련 위해물질-식품의 중금속 오염 현황과 관리방안

  • Yun, Gi-Seon
    • Bulletin of Food Technology
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    • v.20 no.4
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    • pp.37-49
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    • 2007
  • 중금속은 인류가 금속을 이용하기 시작하면서 위험인자로 대두되기 시작하여 산업화 과정과 함께 환경오염을 초래하였고 나아가 식품을 오염시키는 원인물질로 작용함으로써 인간의 건강을 위협하기에 이르렀다. 중금속은 체내에서 분해되기 어렵고 배출이 쉽지 않아 생물체에 축적되면 먹이 연쇄를 따라 농축되므로 먹이사슬의 최종소비자인 사람에게 식품의 중금속 오염은 심각한 문제다. 특히 수은, 납, 카드뮴은 식품 중에서 공통적으로 볼 수 있는 독성물질로 생체조직과 강한 결합을하여 생체 내에 축적되어 천천히 제거되는 유해물질이다. 본문에서는 국내.외의 연구결과를 토대로 식품의 중금속 오염현황, 위해성, 관리방안에 대해 살펴보고자 한다.

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잔류중금속에 대한 고찰

  • Lee, Mun-Han
    • The Korea Swine Journal
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    • v.12 no.9
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    • pp.140-143
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    • 1990
  • 중금속이란 비중이4.0이상인 금속류로서 독성을 가진 것이나, 사람이나 가축에 대하여 노출될 가능성이 큰것은 비소.카드뮴.납.수은.주석.아연.철.구리.셀레늄 등 10여종에 이른다 이와같은 중금속에 의한 중독은 대체로 중금속이 함유된 공산품을 취급하는 근로자들의 직업병으로는 흔히 보고되어 있으나, 식품중에 잔류하는 중독은 이따이 이따이 병등이 보고되어 있다.

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Heavy Metal Concentrations in Soils and Crops in the Poongwon Mine Area (풍원광산 지역의 토양 및 농작물 중금속 오염)

  • Kim, Jakwan
    • Journal of the Korean GEO-environmental Society
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    • v.11 no.2
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    • pp.5-11
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    • 2010
  • Abandoned mines release acid mine drainage and cause the contamination of soil and crops around the mine area. The objective of current study is to evaluate effect of mine on the soil and crop contamination. Soils, water, and crops were collected and analyzed, and the heavy metal data were classified into types of the soil, types of crops, and distance from the minehead. Surface soils of the mine area were highly contaminated with heavy metals, especially with zinc and lead. Tailings and cultivated paddy soils were also highly contaminated. Heavy metal concentrations upon distance from minehead decrease steadily as the distance from the minehead increase. The correlation between heavy metals was extracted from soils and the content in the rice samples showed a positive relation for arsenic and cadmium but not a meaningful relation for other metals.

The Inhibitory Effects of Intestine-oriented Lactobacillus sp. KP-3 on the Accumulation of Heavy Metals in Sprague Dawley rats (Sprague Dawley 쥐에서 장내 유래 Lactobacillus sp. KP-3의 중금속 축적 저해 효과)

  • Kim, Shin Yeon;Kim, Hyun Pyo
    • Journal of Life Science
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    • v.25 no.2
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    • pp.164-173
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    • 2015
  • To investigate the effect of lactic acid bacteria on the heavy metal adsorption from internal organs and blood, lactic acid bacteria were isolated from human feces. Some strains resistant to heavy metals were selected by incubation in agar media containing each of chrome and cadmium salts. Among them, a strain named KP-3 was ultimately chosen due to its higher growth rate in selective broth medium containing the heavy metals at the concentration of 0.01%. The strain was identified as Lactobacillus sp. based on its morphological, cultural and physiological characteristics. For evaluating the ability to prevent accumulation of heavy metals by selected Lactobacillus sp. strain in vivo, Sprague Dawley rats were fed with heavy metal salts (cadmium, chrome and lead) with or without cultured whole cells for 7 days. The amounts of heavy metals accumulated in liver, kidney and blood were analyzed. As a result, chrome was accumulated to kidney mostly, and lead was frequently found in liver and kidney. Experimental group (rats fed with lactic acid bacteria) showed less accumulation of heavy metal than control group (rats fed with saline solution). The inhibition rates of heavy metal accumulation were calculated to 41.8% (Cd), 33.4% (Cr) and 44.2% (Pb). Especially, feeding lactic acid bacteria strongly reduced accumulation of cadmium in blood. The results showed that feeding Lactobacillus sp. KP-3 could prevent the bioaccumulation of heavy metals in the living body.

The Study on the Removal Process of Heavy Metals from Mine Drainage Using Coal Bottom Ash (석탄 바닥회를 이용한 광산배수의 중금속 제거 공정 연구)

  • Kim, Hye Rim;Lee, Jung Mi;Han, In Kyu
    • Resources Recycling
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    • v.29 no.6
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    • pp.41-47
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    • 2020
  • This study was carried out to utilize the coal bottom ash generated in a circulating fluidized bed combustion boiler as a treatment agent for heavy metal ions, and experiments were conducted to remove heavy metal ions from the acid mine drainage. The batch experiments were conducted to investigate the influence of dosage of ash, initial concentration of solution on the removal capacity of heavy metal ions (Cu, Cd, Cr, Pb). The results of the experiment showed that the total removal capacity of heavy metals was 30.8 mg/L and 46.4 mg/g, respectively, under the condition that the concentration of coal ash was added as 15 g/L of heavy materials and 10 g/L of light materials. After that, a long-term column experiment was performed to determine the maximum removal capacity of heavy metal ions (Cu, Cd, Cr, Pb, As), and the removal capacity for each metal component was investigated. After approximately 60 days of operation, the maximum removal capacity of heavy metals was 23.6 mg/g at pH 9.25.

A study on the Removal of Heavy Metals from Industrial Wastewater by Treatment with Discarded Automotive Tires (폐 타이어에 의한 고장폐수 내의 중금속 제거에 관한 연구)

  • Choung, Youn Kyoo;Min, Dal Ki;Oh, Hyun Je
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.6 no.4
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    • pp.29-42
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    • 1986
  • This study is an experimental research on the adsorption capacity and the adsorption system utilizing Discarded Automotive Tires(DAT) and Powdered or Granular Activated Carbon(PAC or GAC) for the removal of heavy metals, Ag(I), Cd(II), Cu(II), Zn(II). Batch shaking test was conducted to determine the adsorption capacity of DA T and PAC in removing the heavy metals from aqueous wastes; and laboratory-scale column experiment was performed to present design factors affecting the optimum design of adsorption column with DAT and GAC, through the concept of Bed Deph/Service Time(BDST). As results, DAT has been proven to be a good adsorbent will its adsorption capacity not falling behind PAC or GAC. Factors affecting heavy metals removals were amount of adsorbents, initial concentrations, pH and so on. BDST equations were compared with values presented by the breakthrough data from adsorption system.

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Adsorption of Heavy Metals Cd, Cu and Zn on Peat (Peat에 의한 중금속(重金屬) Cd, Cu, Zn의 흡착(吸着))

  • Han, Kang-Wan;Choi, Hyun-Ok
    • Korean Journal of Environmental Agriculture
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    • v.11 no.3
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    • pp.195-200
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    • 1992
  • Heavy metal adsorption on peat was studied to examine the utilization of abundant natural resouces as pollution control. The smaller the peat particle size, the more the heavy metals studied were adsorbed. Adsorption of heavy metals on peat was greater in single metal solutions than in mixed solutions, and the order of adsorption amount on peat was Cu > Cd > Zn. The most effective pH range of the adsorption of Cd, Zn, and Cu was between 4 and 6. With increasing the concentration of heavy metals the amount of adsorption on peat was increased, but the adsorption ratio was decreased. The adsorption of heavy metals on peat was fitted to the Freundlich isotherm and peat was appeared to be an effective adsorbent of the heavy metals. The treatment of polyethyleneimine(PEI) on the peat surface effectively increased adsorption capacity of the heavy metals. Because of its higher energy content, the heavy metal adsorbed peat could be utilized as a energy source. After burning the peat, the reduced peat volume could be save the expenses for waste disposal.

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