• Title/Summary/Keyword: 중금속 및 비소

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The Distribution Characteristics and Contamination of Heavy Metals in Soil from Dalcheon Mine (달천광산 토양 내 중금속의 존재형태 및 오염도)

  • Suh, Ji-Won;Yoon, Hye-On;Jeong, Chan-Ho
    • Journal of the Mineralogical Society of Korea
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    • v.21 no.1
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    • pp.57-65
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    • 2008
  • The geochemical partitioning of arsenic in contaminated soils from a of wet land and tailing of the abandoned mine is examined. Chemical analysis and sequential extraction method by ultrasound-sonication extraction are applied to investigate the mobility and chemical existence conditions of arsenic as well as heavy metals. The results of this study showed that heavy metals concentration of tailings showed as a following order: Fe > As > Cu > Pb > Cr. The highest metal concentration was recognized in samples less than $63\;{\mu}m$ fraction in their particle sizes. Exchangeable and carbonate fractions in soil samples showed following Cu > As > Pb > Fe > Cr for tailings, and Fe > Pb > Cu > As > Cr for reservoir soils, respectively. Arsenic was bound as exchangeable fraction in tailings and its concentration appeared higher than those of the other metals. Thus, As can be easily dispersed into soil and water environments. The obtained results can be used to design soil remediation plan in the study area and require further detailed study to investigate severe environmental pollution of surface water as well as rivers with respect to heavy metals in terms of speciation analysis of toxic elements such as As and Cr.

Detection of Heavy Metal Contents in Sesame Oil Samples Grown in Korea Using Microwave-Assisted Acid Digestion

  • Park, Min-Kyoung;Yoo, Ji-Hyock;Lee, Je-Bong;Im, Geon-Jae;Kim, Doo-Ho;Kim, Won-Il
    • Journal of Food Hygiene and Safety
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    • v.28 no.1
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    • pp.45-49
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    • 2013
  • This study aimed to determine heavy metal contents in sesame oil samples produced in Korea through microwave-assisted acid digestion without using an emulsifier. Three heavy metal, cadmium (Cd), lead (Pb) and arsenic (As) in twelve sesame oil samples were determined by ICP-MS. The validation of analysis method was checked by standard addition method (10 and $100{\mu}g/kg$). As a result, linearity ($R^2$) was above 0.999 and RSDs were lower than 4%. The recovery of Cd, Pb and As ranged between 98.5-101.6%, 100.3-101.3%, and 102.1-111.2%, respectively. The detected ranges in sesame oil samples were as follows; N.D. to $0.109{\mu}g/g$ for Cd, 0.014 to $0.200{\mu}g/g$ for Pb and 0.014 to $0.125{\mu}g/g$ for As, respectively. Therefore, sesame seeds and products grown in heavy metal-polluted regions which are used as food should be given priority attention and consideration.

Leaching Characteristics of Arsenic and Heavy Metals and Stabilization Effects of Limestone and Steel Refining Slag in a Reducing Environment of Flooded Paddy Soil (담수된 논토양의 환원 환경에서 비소 및 중금속의 용출특성과 석회석 및 제강슬래그의 안정화 효과 검토)

  • Yun, Sung-Wook;Kang, Sin-Il;Jin, Hae-Geun;Kim, Ha-Jin;Yu, Chan
    • Journal of agriculture & life science
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    • v.45 no.6
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    • pp.251-263
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    • 2011
  • In order to investigate treatment effects of limestone and steel refining slag for paddy soils contaminated with arsenic and heavy metals, a lab-column test was carried out under reducing environments of flooded paddy soils. In conditions of the flooded paddy soils, at the point of time when iron and manganese were reduced and leached rapidly, heavy metals also leached rapidly, and some leachate samples from an untreated soil exceeded regulatory standards. On the contrary, all samples from soils treated with limestone 5% and steel refining slag 5% respectively were below the regulatory standards, showing much lower heavy metal concentrations than in the untreated soil. Arsenic increased continuously during the observation period according to its typical characteristics, and along with decreasing redox potential, arsenic was expected to leach as $H_3AsO_3$-of form $A^{3+}$ with high mobility and strong toxicity. Limestone and steel refining slag showed high treatment effects against heavy metals present in soil and steel refining slag especially showed the high treatment effects against arsenic.

Geochemical Contamination Assessment and Distribution Property Investigation of Heavy Metals, Arsenic, and Antimony Vicinity of Abandoned Mine (폐광산 인근지역에서 중금속, 비소, 안티모니의 지구화학적 오염도 평가 및 분산 특성 조사)

  • Han-Gyum Kim;Bum-Jun Kim;Myoung-Soo Ko
    • Economic and Environmental Geology
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    • v.55 no.6
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    • pp.717-726
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    • 2022
  • This study was conducted to assess the geochemical contamination degree of As, Cd, Cu, Pb, Sb, and Zn in the soil and water samples from an abandoned gold mine. Enrichment Factor (EF), Geoaccumulation Index (Igeo), and Pollution Load Index (PLI) were carried out to assess the geochemical contamination degree of the soil samples. Variations of sulfate and heavy metals concentration in water samples were determined to identify the geochemical distribution with respect to the distance from the mine tailing dam. Geochemical pollution indices indicated significant contaminated with As, Cd, Pb, and Zn in the soil samples that areas close to the mine tailing dam, while, Sb showed similar indices in all soil samples. These results indicated that the As, Cd, Pb, and Zn dispersion has occurred via anthropogenic sources, such as mining activities. In terms of water samples, anomalies in the concentrations of As, Cd, Zn, and SO42- was determined at specific area, in addition, the concentrations of the elements gradually decreased with distance. This result implies the heavy metals distribution in water has carried out by the weathering of sulfide minerals in the mine tailing and soil. The study area has been conducted the remediation of contaminated soil in the past, however, the geochemical dispersion of heavy metals was supposed to be occurred from the potential contamination source. Therefore, continuous monitoring of the soil and water is necessary after the completion of remediation.

Designing and Applicability of Soil Pollution Indices for Estimating Quality of Soil Polluted with Heavy Metals and Arsenic (중금속 및 비소오염 토양질 평가를 위한 토양오염지표의 고안과 응용 가능성)

  • 박용하
    • Journal of Korea Soil Environment Society
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    • v.1 no.1
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    • pp.47-54
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    • 1996
  • Soil pollution indices (SPI) were designed for estimating quality of soil polluted with arsenic and heavy metals. Applying the quality reference value of soil based on its multifunctional purpose was a key step. For considereing multifunctions of soil, soil was classified into 4 groups-agricultural land, residential area, recreational area, factorial site. Then, each concentration of arsenic and each of five heavy metals (Cd, Cu, Hg, Pb, Zn) in soils grouped was transformed to a mathematical value based on the soil quality reference value which may stand for ecological impact. Soil pollution score (SPS) was the addition of the 6 values transformed, and the range of the SPS was divided into 4 Soil Pollution Classes (SPC). The SPC 1, 2, 3, and 4 were SPS <100, SPS 100-200, SPS >200-300, and SPS >300, repectively. SPS and SPC were evaluated with the results of the data from employing the Soil Network of 1994. Based on the soil quality reference values, SPS and SPC of the Soil Network's data were transformed and classified, respectively. Then, SPS and SPC were compared with arsenic and the 5 heavy metal contents of their reference values resulted from the Soil Network's. From this method, soil quality of most of the Soil Network area was estimated to be healthy. However, ca. 3.0~4.0% of the Soil Network area was determined in a range of slightly and heavily polluted. As the mean value of SPS of the Soil Network's was 66.2 which indicates most of soil evaluated was healthy. When the SPSs of the data were divided into 4 groups of SPC, Class 1 (Good quality of soil), Class 2 (Need to be checked area 1), Class 3 (Need to be checked area 2) and Class 4 (Polluted area) were 87.0, 9.4, 2.4, 1.2%, respectively. Using SPI were comparable to those of heavy metal contents in soils, and would be comprehenve to determine the status of soil qulity. Methodology of the developing SPI would be applicable to the other soil pollutants such as organic and inorganics than arsenic and 5 heavy metals used here.

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Studies on Heavy Metal Dissolution Characteristics from Sediments of Andong Dam (안동댐 퇴적물의 중금속 용출 특성 연구)

  • Seo, Jeong Min;Kim, Young Hun;Kim, Jeong Jin
    • Journal of the Mineralogical Society of Korea
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    • v.32 no.4
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    • pp.303-312
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    • 2019
  • In this study, X-ray diffraction, ICP analysis, and leaching experiments were performed to analyze the heavy metals and dissolution characteristics of Andong dam sediments. As a result of X-ray diffraction analysis, Andong dam sediment consists of quartz, plagioclase, chlorite and illite. ICP analysis of sediment showed very high concentrations of As and Cd. Leaching experiments were performed in aerobic and anaerobic condition in a disturbed state. The results of leaching experiment showed that more heavy metals were leached in aerobic than anaerobic conditions. Heavy metal that increased in concentration with time in aerobic conditions were Mn, Zn and Cd, and those in anaerobic conditions were Mn, Fe and As. The leaching ratio of heavy metal concentration in sediment was Mn > Cd > Zn > Ni > Cu > As > Pb ≒ Fe ≒ Cr and Mn > As > Cu > Ni > Zn > Pb ≒ Cd ≒ Fe ≒ Cr in aerobic and anaerobic conditions, respectively.

Effect of Shading Treatment on Arsenic Phytoremadiation Using Pteris multifida in Paddy Soil (봉의꼬리를 이용한 논토양의 비소정화에 미치는 차광처리의 영향)

  • Kwon, Hyuk Joon;Cho, Ju Sung;Lee, Cheol Hee
    • Korean Journal of Plant Resources
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    • v.26 no.1
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    • pp.68-74
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    • 2013
  • This study was conducted to analyse the effectiveness of shading on growth and arsenic absorption of Pteris multifida, known as hyperaccumulator of arsenic, from paddy soils contaminated with heavy metals. Study was carried out in paddy soil polluted by arsenic near the former Janghang smelter. P. multifuda in the same growth stage was planted with $20{\times}20cm$ intervals in each experimental plot ($2{\times}2m$), and cultivated for 24 weeks. The growth of P. multifuda according to shading conditions was evaluated, the accumulated amount of arsenic in plants and arsenic variation in the soil was analyzed using ICP. In the result of this study, the growth of P. multifida cultivated under shading treatment was vigorous than non-shading. Accumulated amount of arsenic in aerial parts of P. multifida cultivated under non-shading ($169.8mg{\cdot}kg^{-1}$) was slightly higher than shading ($140.9mg{\cdot}kg^{-1}$), and those in underground part were almost the same. But the growth was great in 70% shading treatment. Therefore, arsenic contents absorbed from soils was much higher in shading treatment. Arsenic translocation rate (TR) of P. multifida was very high (0.87~0.89) regardless of shading conditions. So arsenic in soil could be efficiently eliminated by removal of aerial parts.

Experimental Studies on the Neutralizing Acidic Soils with Limestones (석회석을 활용한 산성토양의 중성화에 관한 실험적 연구)

  • Seo, Myeong-Jo;Lee, Jin-Yeong;Han, Chun;Yoon, Do-Yeong;Choi, Sang-Il;Lee, Hwa-Yeong;Kim, Seong-Gyu;Oh, Jong-Gi
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • 1998.06a
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    • pp.3-7
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    • 1998
  • 본 연구에서는 광산 인근 토양에서 산성비를 비롯한 침출수에 의한 지하 환경 오염 메카니즘을 검토하고, 오염 방지 및 교정과 대안의 효과를 정량화 하기 위한 방안을 고찰하였다. 이를 위하여 중금속인 비소의 오염도가 높은 토양을 대상으로 인위적 산성용액에 의한 비소의 용출을 실험적으로 검토하였다. 한편, 산성 침출오염수에 의한 지하 환경의 오염을 방지하기 위하여 석회석을 활용한 토양의 안정화방법의 효과를 살펴보았다. 오염된 시료토양에 포함된 비소는 pH 1 이하의 강산성 용액일수록 격렬히 용출되었으며, pH 값이 낮아질 수록 최대 용출량은 증가되는 것으로 나타났다. 석회석에 의한 토양 안정화방안은 매우 효과적이었으며, 석회석에 의한 산성용액의 중화반응 특성식은 미반응 핵 모델중에서 화학반응이 속도지배인 특성식에 잘 부합되는 것으로 보여진다.

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Soil Components and Elution Characteristics of Heavy Metals in Sediments of Andong and Imha Reservoir (안동・임하호 저니토의 토양 성분과 중금속 용출 특성)

  • Seo, Eulwon;Kim, Younjung;Baek, Seungcheol
    • Journal of the Korean GEO-environmental Society
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    • v.9 no.4
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    • pp.47-52
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    • 2008
  • In this study, it was analyzed the soil components and elution characteristics of heavy metal ions in sediment samples to examine the effect of sediments embedded in Andong and Imha reservoirs on water quality. Major elements of sediments were shown to be Al, Si, K, and Fe by EDS analysis and major soil components of the collected 6 different sediments were illite (I), kaolinite (Ka), quartz (Q) and feldspar (F). And especially quartz took up a considerable part of sediments by XRD analysis. The total concentrations of Zn, As, Cr, Cu and Pb in sediments of Andong reservoir were relatively higher than those of Imha reservoir. The elution property of heavy metal from sediments had various aspects according to pH. Among the heavy metals in Andong reservoir sediments, As and Zn were significantly eluted at pH 6 compared with the other heavy metals. In the case of the adsorption tests using the sediments, the adsorptive capacities of Zn, Cd and Cu were very weak, on the while those of Pb and Cr were high.

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Risk Assessment of Heavy Metals in the Vicinity of the Abandoned Metal Mine Areas (폐금속광산지역 중금속의 위해성 평가)

  • Lee, Jin-Soo;Kwon, Hyun-Ho;Shim, Yon-Sik;Kim, Tae-Heok
    • Journal of Soil and Groundwater Environment
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    • v.12 no.1
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    • pp.97-102
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    • 2007
  • An environmental survey from three abandoned metal mine areas was undertaken on to assess the risk of adverse health effects on human exposure to heavy metals influenced by past mining activities. Tailings contained high concentrations of heavy metals may have a impact on soils and waters around the tailing piles. In order to perform the human risk assessment, chemical analysis data of soils, rice grains and waters for As, Cd, Cu and Pb have been used. The HQ values for heavy metals via the rice consumption were significantly higher compared with other exposure pathways in all metal mine areas. The resulting HI values in three mine areas were higher than 9.0, and their toxic risk due to rice ingestion was strong in these mine areas. The cancer risk of being exposed to As by the rice consumption from the A, B and C mine areas was $5.1\;{\times}\;10^{-3}$, $6.8\;{\times}\;10^{-3}$ and $3.1\;{\times}\;10^{-3}$, respectively. The As cancer risk via the exposure pathway of rice ingestion from these mine areas exceeds the acceptable risk of 1 in 10,000 set for regulatory purposes. Thus, the daily intakes of rice by the local residents from these mine areas can pose a potential health threat if exposed by long-term As exposure.