• Title, Summary, Keyword: 백색침전물

Search Result 17, Processing Time 0.041 seconds

Comparative Analysis of Heavy Metal Contamination, Mineral Composition and Spectral Characteristics of White, Reddish Brown and Mixed Precipitates Occurring at Osip Stream Drainage, Gangwondo, South Korea (강원도 오십천 수계에 분포하는 백색침전물, 적갈색침전물 및 혼합침전물의 중금속 오염, 광물조성 및 분광학적 특성의 비교분석)

  • Lim, Jeong Hwa;Yu, Jaehyung;Shin, Ji Hye;Koh, Sang-Mo
    • Economic and Environmental Geology
    • /
    • v.52 no.1
    • /
    • pp.13-28
    • /
    • 2019
  • This study analyzed precipitation environment, heavy metal contamination, and mineral composition of white, reddish brown and mixed precipitates occurring at the Osip stream drainage, Gangwondo. Furthermore, spectral characteristics of the precipitates associated with heavy metal contamination and mineral composition was investigated based on spectroscopic analysis. The pH range of the precipitates was 4.43-6.91 for white precipitates, 7.74-7.94 for reddish brown precipitates, and 7.59-7.9 for the mixed precipitates, respectively. XRF analysis revealed that these precipitates were contaminated with Ni, Cu, Zn, and As. The white precipitates showed high Al concentration compared to reddish brown precipitates as much as 3.3 times, and the reddish brown precipitates showed high Fe concentration compared to white precipitates as much as 15 times. XRD analysis identified that the mineral composition of the white participates was aluminocoquimbite, gibbsite, quartz, saponite, and illite, and that of reddish brown precipitates was aluminum isopropoxide, kaolinite, goethite, dolomite, pyrophyllite, magnetite, quartz, calcite, pyrope. The mineral composition of the mixed precipitates was quartz, albite, and calcite. The spectral characteristics of the precipitates was manifested by gibbsite, saponite, illite for white precipitates, goethite, kaolinite, pyrophyllite for reddish brown precipitates, and albite for the mixed precipitates, respectively. The spectral reflectance of the precipitates decreased with increase in heavy metal contamination, and absorption depth of the precipitates indicated that the heavy metal ions were adsorbed to saponite and illite for white precipitates, and goethite and magnetite for reddish brown precipitates.

A Study on Analysis of Influx Path and Ingredient of Sedimentation Substance in Tunnel Drainage System (터널 배수시설에 유입된 침전물의 유입경로 및 성분분석 연구)

  • Woo, Jong-Tae;Yoo, Sang-Geon
    • Journal of the Korea institute for structural maintenance and inspection
    • /
    • v.8 no.4
    • /
    • pp.145-152
    • /
    • 2004
  • Red sedimentation substance contains large portion of Fe. The earth retaining structure of a tunnel and ground water containing more portion of Fe than other area are the major factor of this substance In case of white sedimentation substance, the most frequently founded ingredient is CaO, which is occurred in case grouting injection materials for ground reinforcement is transmitted into a tunnel system by ground water. This substance is doesn't affect safety of a tunnel Black sedimentation substance is often found in tunnels near station. This substance is a mixture of either white or red sedimentation substance and detergent material in station transmitted to a tunnel drainage system.

Characteristics of Water Contamination and Precipitates of Acid Mine Drainage, Bongyang Abandoned Coal Mine, Danyang, Chungbuk Province with Emphasis on Fe and Al behaviors (충북 단양 봉양폐탄광 산성광산배수의 수질오염과 침전물의 특성: 철, 알루미늄의 거동을 중심으로)

  • Choo, Chang Oh;Lee, Jin Kook
    • The Journal of Engineering Geology
    • /
    • v.29 no.2
    • /
    • pp.163-183
    • /
    • 2019
  • We investigated acid mine drainage (AMD) of Bongyang abandoned coal mine, Danyang, Chungbuk Province with emphasis on geochemical contaminants in AMD and precipitates using chemical analyses, XRD, SEM, IR, and $^{27}Al$ NMR. Water chemistry changes with pH and oversaturation of chemical species. According to calculation of saturation index, the AMD is saturated with various Fe, Al minerals. Orange or orcher precipitates are composed of schwertmannite and goethite, associated with Leptothrix orchracea bacteria, whereas whitish precipitates are composed mostly of alumimous minerals such as basaluminite with poor crystallinity. The whitish precipitates include trace $Al_{13}$-Tridecamer. It is important to control the precipitation and solubility of aluminous species for ensuring remediation and control for the AMD discharged from the Bongyang abandoned coal mine.

Changes in Compositions of Effluent Water from Mine Wastes in Danbung Mine, Munkyung (문경 단붕탄광 폐석장 유출수의 조성변화)

  • 지상우;김선준;안지현
    • Journal of the Korean Society of Groundwater Environment
    • /
    • v.4 no.4
    • /
    • pp.169-174
    • /
    • 1997
  • Stream water and precipitates were analyzed for metal contents to evaluate the compositional changes of effluent water from mine waste Danbung mine located in the vicinity of Munkyung. Samples were collected before and after the rainy season in 1995 and before the rainy season in 1997 to observe seasonal variation and the charge of the status of pollution after the lapse of two years. Increased metal contents and lowered pH values after rainy season are thought of the results of flushing of oxidation products of pyrite accumulated during dry season in mine wastes. The results of two years later showed that pollution by AMD have progressed more seriously in that pH has been lowered by one order and metal contents increased about twice. The spatial distribution of various Fe, Al hydroxides and sulfates occurring as red and white precipitates also changed. Red precipitates occurred at stream bed in longer distance after two years and white precipitates occurred far down from the mine wastes where no precipitates had been observed 1995. And metal contents in sediments also increased up to more than ten times.

  • PDF

중부 옥천대 구룡산층 내 채석장에 의한 수질오염의 수리화학적 특성

  • 이병선;한원식;문상기;신우식;우남칠
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
    • /
    • /
    • pp.225-230
    • /
    • 2002
  • 중부 옥천대 구룡산층 분포지역에서, 채석장 지류는 특징적으로 낮은 pH와 높은 EC를 나타내는 산성광산폐수의 형태를 보이고 있었으며, 황갈색 철 침전물을 나타내고 있었다. 이들은 탄산염이 풍부한 화전리층(상층) 지류와의 혼합으로 백색 알루미늄 침전물을 형성시켰으며, 따라서 산성수의 영향 범위가 크게 나타나지 않는 것으로 확인되었다. 포화지수와 열역학 데이터를 이용한 결과, 본 연구지역 채석장 지류에 황갈색 침전물을 생성시키는 용존철은 래피도크로사이트와 침철석의 복합적인 작용에 의해 농도가 조절되고 있음을 확인하였다.

  • PDF

Fe and Al Behaviors in Precipitates and Pollution Characteristics of Acid Mine Drainage from the Donghae Abandoned Coal Mine, Taebaek, Korea (태백시 동해폐탄광 산성광산배수의 오염현황과 하상퇴적물 내 철, 알루미늄의 거동특성)

  • Choo, Chang Oh;Park, Jung-Won;Lee, Jin Kook
    • The Journal of Engineering Geology
    • /
    • v.29 no.4
    • /
    • pp.579-598
    • /
    • 2019
  • We investigated geochemical contaminants and Fe, Al behavior in precipitates of acid mine drainage (AMD) from the Donghae abandoned coal mine, Taebaek, Gangwon Province using aqueous chemical analyses, XRD, IR, and 27Al NMR, Our results showed that water chemistry changed with pH and Eh, and saturation indices of chemical species in the AMD. According to saturation calculated by visual MINTEQ, the AMD was saturated with various Fe-, Al-oxyhydroxide minerals. Reddish brown precipitates are composed of schwertmannite, ferrihydrite, and goethite, whereas whitish precipitates are composed mostly of alumimous minerals such as poorly crystallized basaluminite with trace Al13-Tridecamer. It is important to apply active treatment methods rather than simple storage pond and to control the precipitation and solubility of iron species and aluminous species for ensuring remediation and control for the AMD discharged from the Donghae abandoned coal mine.

Identification of Buza by Detecting Aconitine-type Alkaloids (Aconitine 류 알칼로이드의 검출에 의한 부자류 생약의 확인)

  • Eom, Dong-Ok;Ban, Tae-Hwan
    • Analytical Science and Technology
    • /
    • v.12 no.3
    • /
    • pp.243-247
    • /
    • 1999
  • After aconitine-type alkaloids have been isolated from the crude drug "Buza" as the precipitate, they could be identified with colour test, UV/Vis. absorption wavelength, TLC. The presence of aconitine-type alkaloids are confirmed by the reaction with the Reineke ion, $[Cr(NH_3)_2(SCN)_4]^{1+}$, and TCR ion, $[Co(SCN)4]^{2-}$, to produce the white precipitate or one of the containing from blue to yellowish blue. It is based on the formation of complex compounds by aconitine-type alkaloids with Reineke and TCR reagent. The method has been found to be simple, convenient and suitable for routine identification of aconitine-type alkaloids, related basic compounds, the crude drug "Buza" processed from the roots of certain Aconitum spp. plants(Ranunculaceae).

  • PDF

Heavy Metal Contamination Characteristics and Spectral Characteristics of White Precipitation occurring at Miin Falls Drainage (미인폭포 수계에서 발생하는 백색침전물의 중금속 오염 및 분광학적 특성)

  • Lim, Jeong Hwa;Yu, Jaehyung;Shin, Ji Hye;Jeong, Yong Sik;Koh, Sang-Mo;Park, Gyesoon
    • Journal of the Mineralogical Society of Korea
    • /
    • v.30 no.1
    • /
    • pp.31-43
    • /
    • 2017
  • This study investigated mineralogy, spectral characteristics and heavy metal contamination including Cd, Ni, Al, Fe, Mn and S for white precipitation in Miin falls based on XRF, XRD, and spectrometer. As a result, Al concentration was abnormally high at all samples, and most of the samples showed high contamination level in Cd and Ni. XRD results detected quartz, kaolinite, rhomboclase, aluminocoquimbite, and gibbsite which infers that heavy metal elements are distributed by adsorption with clay minerals. Spectral characteristics of white precipitation can be described by increasing pattern of reflectance in visible spectrum and decreasing pattern of reflectance in longer wave length including near infrared and shortwave infrared spectrum. The absorption features reveals that spectral characteristics of white precipitation is mainly controlled by kaolinite, rhomboclase, aluminocoquimbite, and gibbsite. The relationship between heavy metal concentration and absorption depth showed high positive correlation for Al concentration and absorption feature at 2202 nm of Al-OH absorption. This spectral characteristics indicates that absorption depth could be effectively used for estimation of heavy metal concentration.

Dissolution Mechanism of Abandoned Metal Ores and Formation of Ochreous Precipitates, Dalseong Mine (달성광산의 폐금속 광석의 용해메커니즘과 하상 침전물의 형성특징)

  • Choo, Chang-Oh;Lee, Jin-Kook;Jeong, Gyo-Cheol
    • The Journal of Engineering Geology
    • /
    • v.18 no.4
    • /
    • pp.577-586
    • /
    • 2008
  • The formation of acid mine drainage is closely related to water chemistry and ochreous sprecipitates formed at the bottom of creeks because it is initially derived from the possible water-rock interaction in abandoned waste metals at the mine. According to analyses on water, precipitates, and alteration characters of ore metals in Dalseone mine, whitish precipitates formed at pHs above 5 while schwertmannite formed at pH $3{\sim}4$. Water chemistry vary with seasons. The water chemistry of the treatment site measured ir Octoter 2002 is characterized by lower pH, and higher Al, Zn, Cu contents relative to those in March, 2003. In the latter case, As and Cl contents are very high. $^{27}Al$ MAS NMR data show the presence of predominant octahedral Al in whitish precipitates. Metal ore minerals dissolve at margins, cleavage, or comer of crystals where reactive sites are potential. Pyrite dissolves, forming etch pits or smooth faces on the edge.

A study on analysis of influx path and ingredient of sedimentation substance and groundwater influx quantity in downtown tunnel (도심지터널에 유입된 지하수량 및 침전물의 성분분석 연구)

  • Woo, Jong-Tae
    • Journal of Korean Tunnelling and Underground Space Association
    • /
    • v.7 no.3
    • /
    • pp.219-226
    • /
    • 2005
  • The result that analyze for 6 years a groundwater influx quantity of total 60 catch-pit established in subway line 5 appeared with $0.77m^3/min$. When comparing design approaches of the catch-pit with design approaches of the box structure $2m^3/min$ and the tunnel structure $3m^3/min$, it is found that it has a surplus. Red sedimentation substance contains large portion of Fe. The earth retaining structure of a tunnel and groundwater containing more portion of Fe than other area rue the major factor of this substance. In case of white sedimentation substance, the most frequently founded ingredient is CaO, which is occurred in case grouting injection materials for ground reinforcement is transmitted into a tunnel system by ground water. This substance is doesn't affect safety of a tunnel.

  • PDF