• Title, Summary, Keyword: 적갈색침전물

Search Result 17, Processing Time 0.048 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.

Heavy Metal Contamination, Mineral Composition and Spectral Characteristics of Reddish Brown Precipitation Occurring at Osip Stream Drainage, Gangwon-do (강원도 오십천 수계에서 발생하는 적갈색침전물의 중금속 오염, 광물조성 및 분광학적 특성)

  • Lim, Jeong Hwa;Yu, Jaehyung;Bae, Sungji;Koh, Sang-Mo;Park, Gyesoon
    • Journal of the Mineralogical Society of Korea
    • /
    • v.31 no.2
    • /
    • pp.75-86
    • /
    • 2018
  • This study analyzed precipitation environment, heavy metal concentration, mineral composition, and spectral characteristics associated with heavy metal concentration and mineral composition for the reddish brown precipitates occurred in the drainage of Dogye mining station. The pH of the reddish brown precipitates ranges from 7.59 to 7.94 resulting neutral. XRF analysis reveals that the precipitates has high Fe concentration, and contaminated with Ni, Cu, and Zn. Dolomite, calcite, goethite, magnetite, kaolinite, pyrophyllite, quartz and aluminum isopropoxide were identified based on XRD analysis. As a result of spectral analysis associated with heavy metal contamination, visible reflectance increases and infrared reflectance decreases with a increase in heavy metal concentration. The spectral characteristics of the reddish brown precipitates is turned out to be manifested by goethite, magnetite, kaolinite, pyrophyllite and aluminum isopropoxide.

Mineralogy of Ferrihydrite and Schwertmannite from the Acid Mine Drainage in the Donghae Coal Mine Area (동해탄광일대의 산성광산배수에서 침전된 페리하이드라이트와 슈워트마나이트에 대한 광물학적 연구)

  • Kim, Jeong-Jin;Kim, Soo-Jin
    • Journal of the Mineralogical Society of Korea
    • /
    • v.16 no.2
    • /
    • pp.191-198
    • /
    • 2003
  • The ochreous precipitates, reddish brown and brownish yellow in color, are pre- cipitated in the stream bottom of acid mine drainage (AMD) in the Donghae coal mine area. X-ray diffraction analysis shows that the reddish brown precipitate consists mainly of ferrihydrite with small amount of goethite, while the brownish yellow precipitate of schwertmannite. Thermal experiments show that ferrihydrite and schwertmannite partially convert to poorly-crystallized hematite at $400^{\circ}C$ and to well-crystallized hematite at $700^{\circ}C$.

Characteristics of the Dalseong Acid Mine Drainage and the Role of Schwertmannite (달성폐광산 산성광산배수의 발달특징과 슈베르트마나이트의 역할)

  • Choo, Chang-Oh;Jeong, Gyo-Cheol;Lee, Jin-Kook
    • The Journal of Engineering Geology
    • /
    • v.17 no.2
    • /
    • pp.187-196
    • /
    • 2007
  • The Dalseong acid mine drainage were studied focused on the characters of schwertmannite that controls geochemistry of the stream. Besides chemical analysis of stream water, particle size analysis, XRD SEM and TEM were performed on precipitates of streams and on wasted metalliferous ores. The AMD discharged from the abandoned mine reveals a decrease of pH and EC downward stream. Euhedral sulfur occurs as equigranular aggregates on the altered pyrite while fine acicula goethite coalesces to form cross, star, or starfish-like shapes. Water chemistry plotted on the Eh-pH diagram shows that schwertmannite and ferrihydrite are stable phases. Reddish brown precipitates consist of mostly schwertmannite with less goethite, whereas yellowish brown precipitates are composed of geothite with less schwertmannite. The particle size of precipitates ranges $d(0.1)\;0.861{\mu}m{\sim}3.769{\mu}m,\;d(0.5)\;3.984{\mu}m{\sim}15.255{\mu}m,\;and\;d(0.9)\;9.875{\mu}m{\sim}56.726{\mu}m$. Schwertmannite is characterized by equigranular spheric form. Pincushion or spicule with 100nm width and $200{\sim}300nm$length form on schwertmannite sphere with radial growth patterns. It is highly probable that reddish or yellowish brown precipitates formed in many AMDs may contain schwerhnannite. Because it can serve as sink for removing heavy elements by adsorption in AMD system, there is a need to correctly identify schwertmannite in precipitates and to characterize its phase stability.

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.

Mineralogical and Geochemical Properties of Clay-silt sediments Exposed in Jangdongri, Naju, Korea (전남 나주시 장동리 지역에 노출된 적갈색 점토-실트 퇴적물의 광물 및 지화학적 특성)

  • Kwak, Tae-Hun;Jeong, Gi Young
    • Journal of the Mineralogical Society of Korea
    • /
    • v.30 no.1
    • /
    • pp.11-19
    • /
    • 2017
  • Reddish brown clay-silt sediments covered granitoid weathering crust in the Jangdongri area, Naju, Korea. Mineralogical and geochemical properties of the ~2 m sediment section were investigated. The sediments were composed mainly of quartz (50%) and clay minerals (45%) with minor contents of K-feldspar, goethite, hematite, and gibbsite. The clay minerals were illite, illite-smectite mixed-layers, vermiculite, hydroxy-Al vermiculite, kaolinite, and halloysite. Mineral composition varied little through the section with the minor upward enrichment of plagioclase and chlorite. Abundant illitic clay minerals indicated the remote source of the sediments because clays derived by granite weathering in Korea were dominated by kaolin minerals. A comparison with the mineral composition of Asian dust (Hwangsa) suggested that plagioclase and K-feldspar disappeared by chemical weathering after deposition, resulting in the quartz and clay-rich sediments. Plagioclase and chlorite altered to kaolin and vermiculite, respectively. Goethite and hematite derived by the weathering of iron-bearing minerals stained the sediment to reddish brown color. The mineralogical and geochemical properties of the reddish brown clay-silt sediments were consistent with those of eolian deposits identified in Korea, supporting eolian origin of the Jangdongri sediments, requiring future confirmation including age dating and isotopic analysis.

Mineralogy of Precipitates and Geochemisty of Stream Receiving Mine Water in the Sambong Coal Mine (삼봉탄광 주변 수계에 대한 지화학적 특성 및 침전물에 대한 광물학적 연구)

  • Woo, Eum Sik;Kim, Young Hun;Kim, Jeong Jin
    • Journal of the Mineralogical Society of Korea
    • /
    • v.29 no.4
    • /
    • pp.199-207
    • /
    • 2016
  • One of the most significant environmental issues in abandoned coal mine is acidic drainage which gives rise to the many environmental problems that acidifying streams water, sedimentation of iron/aluminium hydroxide, and pollution of water and soil. Water and precipitate samples for experiments were collected from stream and bottom in the pit mouth of Sambong mine. Mine water shows pH range from 7.24 to 7.94 in winter and 3.87 to 5.73 in summer season. The EC shows range from 432 to $897{\mu}S/cm$ at the stream receiving mine water. The highest concentrations of cations such as Mg, Al, Ca, and Mn are showing 15.50, 4.56, 85.30, 12.76 mg/L in the pit mouth, respectively. The reddish brown precipitates (Munsell color 10R-5YR in winter and 2.5YR-5Y in summer) consist mainly of 2-line ferrihydrite and schwertmannite. The precipitates are characterized by rod or cylindrical forms, and coccus or sphere of 0.1 to $0.5{\mu}m$ in diameter.

Using $CuSO_4$ for Preventing Algae Attachment on the Sedimentation Basin of Industrial Water Treatment Plant (공업용수 생산 정수장의 침전지 조류 부착방지를 위한 황산동 투입)

  • Son, Hee-Jong;Jung, Jong-Moon;Kim, Sang-Goo;Jang, Seong-Ho
    • Journal of Korean Society of Environmental Engineers
    • /
    • v.34 no.11
    • /
    • pp.780-785
    • /
    • 2012
  • Existing states of attached algae in the sedimentation basin was observed during late april to early october, and the attached algae were visible 7 days after of cleaning the trough and the communities of algae became larger with increasing the operation periods. Attached algae community included bluegreen algae (Oscillatoria sp.), diatom (Synedra sp.,) and green algae (Mougeotia sp., Oedogonium sp.) and suspended diatom (Stephanodiscus sp.) as well. Diatom (Cymbella sp., Navicula sp., Synedra sp. and Stephanodiscus sp.), green algae(Mougeotia sp. and Cosmarium sp.) and blue-green algae (Anabaena sp.) were detected in the effluent of sedimentation basin. The chlorophyll-a (chl-a)concentrations of algae community on a square centimeter after 14 and 28 days were distinctively different depended on the copper sulphate treatment. The concentration of chl-a were $4{\mu}g/L/cm^2$ and $19{\mu}g/L/cm^2$ for the copper sulphate treated water and $59{\mu}g/L/cm^2$ and $147{\mu}g/L/cm^2$ for the untreated water. Diatom algae fragments were observed in red-brownish sediments on the bottom of industrial water distribution basin and degraded blue-green and green algae formated organic sediments combined with oxidized iron.

Geochemistry and Mineralogical Characteristics of Precipitate formed at Some Mineral Water Springs in Gyeongbuk Province, Korea (경북지역 주요 약수의 지화학과 침전물의 광물학적 특성)

  • Choo, Chang-Oh;Lee, Jin-Kook
    • Journal of the Mineralogical Society of Korea
    • /
    • v.22 no.2
    • /
    • pp.139-151
    • /
    • 2009
  • Mineralogical characteristics of secondary precipitate formed at some mineral water springs in Gyeongbuk Province, Korea were studied in relation to water chemistry. The chemical water types of mineral water springs are mostly classified as $Ca-HCO_3$ type, but $Na(Ca)-HCO_3$ and $Ca-SO_4$ types are also recognized. Ca, Fe, and $HCO_3\;^-$ are the most abundant components in the water. The pH values of most springs lie in 5.76${\sim}$6.81, except Hwangsu spring having pH 2.8. Saturation indices show that all springs are supersaturated with respect to iron minerals and oxyhydroxides such as hematite and goethite. The result of particle size analysis shows that the precipitate is composed of the composite with various sizes, indicating the presence of iron minerals susceptible to a phase transition at varying water chemistry or the mixtures consisting of various mineral species. The particle size of the reddish precipitate is larger than that of the yellow brown precipitate. Based on XRD and SEM analyses, the precipitate is mostly composed of ferrihydrite (two-line type), goethite, schwertmannite, and calcite, with lesser silicates and manganese minerals. The most abundant mineral fanned at springs is ferrihydrite whose crystals are $0.1{\sim}2\;{\mu}m$ with an average of $0.5\;{\mu}m$ in size, characterized by a spherical form. It should be interestingly noted that schwertmannite forms at Hwangsu spring whose pH is very low. At Shinchon spring, Gallionella ferruginea, one of the iron bacteria, is commonly found as an indicator of the important microbial activity ascribed to the formation of iron minerals because very fine iron oxides with a spherical form are closely distributed on surfaces of the bacteria. A genetic relationship between the water chemistry and the formation of the secondary precipitate from mineral water springs was discussed.

A Study on Functionality of the Ulreungdo Seokganju as Korean Traditional Red Pigment (한국 전통 적색광물안료 울릉도석간주의 기능성 연구)

  • Do, Jin-Young;Kim, Soo-Jin;Lee, Sang-Jin;Ahn, Byung-Chan;Yun, Seong-Chul;Kim, Kwang-Jong
    • Journal of the Mineralogical Society of Korea
    • /
    • v.22 no.2
    • /
    • pp.153-162
    • /
    • 2009
  • The main compositions of "Seokganju", a Korean traditional red mineral pigment, are iron oxides. To investigate its mineralogical and functional properties, we had got its ore from Juto cave in Ulreoung island, which was a famous field of it in Korean documents. The ore occurs as a paleosol between the olivine basalt and amphibole trachyte in discontinuously. It is reddish brown and yellowish brown and consists mainly of clay minerals with minor debris. Its reddish and yellowish brown color are due to the hematite and ferrihydrate, respectively. These iron oxides are precipitated as ferrihydrate from the ferrous water in the paleosol and partly changed to hematite. The color reproduced in timber by using seokganju pigment with traditional tools and methods is similar to that in heritage building. The moistureproofing and fire resistance of Ulreungdo seokganju is far better than that of artificial seokganju. Moreover, the combustion tests show that the artificial seokganju promote the ignition and combustion of the timber. Ulreungdo seokganju is regarded as a pigment with fungicidal efficacy because growth of two wood decay fungi (cov. and typ.) are inhibited in solid medium with it.