• Title/Summary/Keyword: Fe/Mn contents

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Analysis of multi-elemental concentration in hair according to effect of permanent wave and bleaching agents (모발의 탈색 및 퍼머넌트 웨이브 효과에 따른 다-원소금속 성분의 함량 분석)

  • Kim, Jun-Kwang;Ha, Byung-Jo
    • Analytical Science and Technology
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    • v.20 no.6
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    • pp.524-528
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    • 2007
  • Variations of the twenty one metal components (Mg, Al, V, Cr, Co, Sr, Ba, Na, K Mn, Fe, Cu, Zn, As, Hg, Pb, Ca, P, Mo, Cd, Sb) were analyzed in human hair sample by inductively coupled plasma mass spectrometry (ICP-MS). The effect of bleach and permanent wave manipulation on the elemental composition of hair were investigated. It was found that the composition of hair varied with hair bleach and permanent wave. Hair sample was collected from male in the age of thirties. Hair sample (0.05 g) was added to the Teflon digestion bomb together with 1.5 mL of nitric acid and an appropriate amount of In as an internal standard. The sample was then decomposed in the microwave digestion system. In normal hair, the contents of V, Cr, Mn, Fe, Co, Cu, Zn, As, Mo, Cd, Sb and P were increased in permanent wave hair, and Mg, Al, V, Co, Sr, Ba, Na and K were increased in bleached hair. But Mg, Al, Sr, Ba, Hg, Pb, Na, K, and Ca contents were decreased with permanent wave hair, Mn, Fe, Cu, Zn, As, Hg, Pb and Ca contents were decreased with bleached hair.

Heavy Metals in Leaves of Roadside Trees in Daegu City (대구지역 가로수잎의 중금속)

  • 이찬형;윤현숙;박연준;권종대;노기철;장성환
    • Journal of Environmental Science International
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    • v.11 no.12
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    • pp.1189-1193
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    • 2002
  • This study was conducted to determine the contents of heavy metals in leaves of roadside trees according to different growth stages in Daegu city. The orders of heavy metal contents in leaves of roadside tree and soil were Fe>Mn>Zn>Pb>Cu>Cr>Cd and Fe>Mn>Zn>Cu>Pb>Cr>Cd, respectively. The contents of heavy metals in leaves of roadside trees and soil showed an increasing tendency as the levels of traffic volume increased. The contents of heavy metals in loaves on October were higher than those on May. Zelkova serrate and Ginkgo biloba showed high contents of Cr, Cd and Pb.

Chemical Composition of Sphalerite Relating to Mineralization at the Tongyoung mine, Korea (통영광산산(統營鑛山産) 섬아연석(閃亞鉛石)의 화학조성(化學組成))

  • Kim, Moon Young;Shin, Hong Ja
    • Economic and Environmental Geology
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    • v.22 no.2
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    • pp.103-115
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    • 1989
  • The Tongyoung deposits are epithermal gold and silver bearing quartz-rhodochrosite vein type deposits of late Cretaceous. They occurs in the andesite and tuff breccia member called Gyeongsang basin. Four mineralizations can be distinguished at the mine based on macrostructures. From earlist stage to lastest stage they are: stage I, base-metal quartz vein; stage II, rhodochrosite vein (IIA) and Pb-Zn vein (IIB); stage III, barren quartz vein; stage IV, calcite-ankeritic rhodochrosite veins. Gold and silver mineralizations occur predominantly in the stage I and IIB. Electrum is closely associated with galena, sphalerite and pyrite, and has chemical compositions of 50.98-64.05 atom % Ag. Sphalerite contains 2.09-5.05 mol % FeS and 0.34-2.01 mol % MnS in the stage I, and 2.01-3.41 mol % FeS and 0.21-2.80 mol % MnS in the stage IIB. The FeS and MnS contents are in general correlated, and shows a characteristic zonal arrangement of electrum. It reveals rhat FeS contents of sphalerite which precipitated before electrum, gradually decreases in a grain during its deposition ranging from about 3.3 to 2 mol %. It may be considered from the above data that an increase of $fs_2$ caused by the oxidation of ore forming fluid is more important that the decrease of temperature.

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Determination of Heavy Metals Concentrations in Urban Air using ICP Method : in the Area of Chung-Ang University (ICP법에 의한 도시대기중 중금속 농도 측정: 중앙대학교를 중심으로)

  • 손동헌;신혜숙;정성윤;정원태
    • Journal of Korean Society for Atmospheric Environment
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    • v.9 no.3
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    • pp.222-229
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    • 1993
  • Total suspended particles in the atmosphere were collected on the quartz fiber filters using an ANdersen Hi-volume air sampler from March 1989 to October 1989 and from June 1990 to February 1991, at Chung-Ang University in Seoul. A total amount of eight heavy metals (Cr, Zn, Cd, Pb, Fe, V, Ti, Mn) in total suspended particles were determined by ICP spectrophotometer. The annual arithmetic mean concentration of total suspended particle was 162.3$\mug/m^3$ and eight metals(Cr, Zn, Cd, Pb, Fe, V, Ti, Mn) were 11.6, 609.2, 3.5, 337.1, 2739.5, 15.1, 89.4 and 100.5ng/$m^3$, respectively. The concentration of total suspended particle was highest in the spring(343.7$\mug/m^3$) and lowest in the summer(91.8$\mug/m^3$). These heavy metals were distinguished into two groups in terms of their particle size distribution. The contents of first-group heavy metals (Fe, Ti, Mn) were increased in accordance with the growth of the particle size. The contents of the second-group ones such as Pb, Cd, V, and Zn, on the contrary, came to increase according as the particle size reduced. Statistical analysis indicated that there was a correlation between total suspended particle and Fe in coarse particles, and between total Suspended Particle and Zn, Pb in fine particle.

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Investigation on the Content and the Existential Form of Heavy Metals in Plants and Soils surrounding Ruined Mine (폐광산(廢鑛山) 주변(周邊) 토양(土壤) 및 식물체(植物體)의 중금속(重金屬) 존재형태(存在形態)와 함량조사(含量調査))

  • Jung, Sang Sub;Park, Chang Dong;Kang, Sang Jai;Park, Woo Churl
    • Current Research on Agriculture and Life Sciences
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    • v.11
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    • pp.111-120
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    • 1993
  • We investigated in the existential forms of heavy metals and their distribution in plant and soil surrounding ruined mine in Daduk area. The content of heavy metals in soils was more plentiful in A soil than that in another soil, excepting only Mn. The content of Mn in soils was greater in B soil than those in another soils. The content of each heavy metals, according to existential form, had different patterns on the comparision of each elements ; organic-form on Cd and As, Carbonate-form Cu, Pb and Mn and Residual-form on Fe and Zn. The popularity ration of M. senensis and J. decipiens were about 65% and 72%, respectively, and which means that these plants had resistances to heavy metals. The contents of heavy metals absorbed in root was higher than those of stem except Mn, In M. sinensis, the contents of Zn in root was similar to that of stem. To study the heavy metal contents in water, the highest content of heavy metal, mainly Fe, Mn and Zn, were calculated in extracting water.

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Distribution and Relation of Mineral Nutrients in Various Parts of Korea Ginseng (Panax ginseng C. A. Meyer) (고려인삼의 부위간 무기성분 분포 및 상관관계)

  • Lee, Chong-Hwa;Shim, Sang-Chill;Park, Hoon;Han, Kang-Wan
    • Journal of Ginseng Research
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    • v.4 no.1
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    • pp.55-64
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    • 1980
  • The distribution pattern of mineral nutrients, among various Parts of Korea ginseng (Panax ginseng C.A. Meyer) was investigated to understand ginseng nutrition by simple correlation analysis. Five·year old ginseng plants grown under four different nutritional environments were sampled and separated into leaf, petiole, stem, rhizome, cortex and epidermis of tap foot, central part of tap root, cortex and epidermis of lateral root, central part of lateral root, fine root in the middle of truly, for chemical analysis. Between mineral nutrients in root, N and P showed highly significant positive correlation each other and with Mg and Cu while all other elements (K, Ca, Mg, Fe, Mn, Zn, Cu, B) showed highly significant positive correlation each other. In shoot, number of mineral nutrient pairs haying significant relation was much less than in root. (Negative: P with Ca or B, K with N, Fe, Mn or Cu, Positive: N with Mg, Fe, Mn or Cu, K with Zn, Ca with Mg, Zn, or B, Fe Mn Cu each other, Mn with B.) The number of pairs having significant correlation in whole plant was approximately the same as the number in root but three of them showed significant negative correlation. The distribution pattern similarity of mineral contents among various parts was also discussed in relation to physiological significance in Korea ginseng plant.

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Thermodynamic Interactions Among Carbon, Silicon and Iron in Carbon Saturated Manganese Melts (탄소 포화 Mn 합금 용액내 C, Si 및 Fe 사이의 열역학적 상호작용)

  • Paek, Min-Kyu;Lee, Won-Kyu;Jin, Jinan;Jang, Jung-Mock;Pak, Jong-Jin
    • Korean Journal of Metals and Materials
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    • v.50 no.1
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    • pp.45-51
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    • 2012
  • Thermodynamics of carbon in manganese alloy melts is important in manufacturing low carbon ferromanganese and silico-manganese alloys. In order to predict the carbon solubility in liquid $Mn-Si-Fe-C_{sat}$ alloys as a function of melt composition and temperature, thermodynamic interactions among carbon, silicon and iron in carbon saturated liquid manganese should be known. In the present study, the effects of silicon and iron on the carbon solubility in Mn-Si, Mn-Fe and Mn-Si-Fe melts were measured in the temperature range from 1673 to 1773 K. The carbon solubility decreases significantly as silicon and iron contents increase in liquid manganese alloy. The interaction parameters among carbon, silicon and iron in carbon saturated liquid manganese were determined from the carbon solubility data and the Lupis' relation for the interaction coefficient at constant activity.

Distribution Characteristics of Heavy Metals in Soil in the Vicinity of King Sejong Station, King George Island, Antarctica

  • Choi, Ik-Won;Seo, Dong-Chul;Kang, Se-Won;Lee, Sang-Gyu;Seo, Young-Jin;Han, Jong-Hak;Heo, Jong-Soo;Cho, Ju-Sik
    • Korean Journal of Soil Science and Fertilizer
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    • v.45 no.1
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    • pp.103-106
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    • 2012
  • To investigate distribution characteristics of heavy metals in soils in the vicinity of King Sejong Station of King George Island, Antarctica, Fe, Mn, Cu, Zn, Pb, Co, Cd, Cr, Ni and Mo contents were investigated under different distances and directions from King Sejong Station. 13 sample sites were distributed from King Sejong Station. In site 4, the Cd content was higher than that in other sites. The Cr content was the highest in site 9, and the Ni and Mn contents were high in site 12. Cu, Co and Zn were highly contained in distance 1~2 km from King Sejong Station. Cd, Cr, Ni and Mo contents were lower, whereas Fe, Mn, Cu, Zn, Pb and Co contents were higher than other heavy metal contents at all sites.

The Effect of Additional Elements on the Tailored Magnetic Properties of Electrochemically Prepared CoPtP-X Alloys (전기화학적으로 제조한 CoPtP-X합금의 첨가제 효과에 따른 맞춤형 자기적 성질)

  • Park, H.D.;Lee, K.H.;Kim, G.H.;Jeung, W.Y.;Choi, D.H.;Lee, W.Y.
    • Journal of the Korean Electrochemical Society
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    • v.8 no.2
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    • pp.94-98
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    • 2005
  • Coptp films with the additive elements (X=Fe, Mn) of varying concentrations were prepared by in-situ electrodeposition, to tailor their magnetic properties. Alloys of CoPtP-X (X=Fe, Mn) were synthesized by changing the solution concentrations of Fe and Mn for electrodeposition. In the electrodeposited CoFePtP alloys, preferred orientation of the electrodeposited films changed from hexagonal (001) to (100) direction with increasing iron contents as revealed by X-ray diffraction, and these films exhibited various magnetic properties ranging from a typical hard magnetic to a soft magnetic property in accordance with microstructural variations. In the case of Mn addition, excellent hard magnetic property was observed at a specific Mn concentration of 0.0126 M in the electrolyte, with the coercivity of 4630 Oe and squareness of 0.856 and this was attributed to the fact that magnetization easy-axis (hexagonal c-axis) coincides with the preferred growth orientation of the film confirmed by transmission electron microscopy.

Characteristics of Manganese Nodule from the East Siberian Sea (동시베리아해 망간단괴의 특성)

  • Koo, Hyo Jin;Cho, Hyen Goo;Yoo, Chan Min;Jin, Young Keun
    • Journal of the Mineralogical Society of Korea
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    • v.30 no.4
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    • pp.219-227
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    • 2017
  • Manganese (Mn) nodules in the Arctic Sea have been founded in the Kara Sea and Barents Sea, but mineral and chemical compositions have been rarely investigated. In this study, mineralogical and geochemical characteristics of Mn nodules obtained during the Arctic Expedition ARA07C in northern East Siberian Sea were identified, and then genesis of Mn nodules were estimated by using these characteristics. Main manganese oxide minerals constituting the manganese nodule were buserite, birnessite, and vernadite. The Mn nodules generally represent radiated and massive texture, and the layered texture was developed restrictively. The radiated texture, main feature of the manganese nodule in the East Siberian Sea, is mainly composed of cuspate-globular microstructure. Compared with the Mn nodules in Pacific and Indian Oceans, Mn nodules of the East Siberian Sea are abundant in Mn, but Fe is too scarce. There was no difference in the chemical composition and microstructures between outer and inner part of nodule. Therefore, nodules are most likely to have only one genesis during their growth, and all of nodules indicate the diagenetic in $Mn-Fe-(Cu+Ni+Co){\times}10$ ternary diagram. It is considered that the manganese nodules in the East Siberian Sea are characterized by high Mn contents because manganese contents in the Arctic Ocean were mainly resulted from river or coastal erosion and most of them are trapped in the Arctic Ocean.