• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1996.09a
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• pp.61-76
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• 1996

본 연구는 하천유역의 중금속을 제거하는데 식물을 활용하기 위해 1994년 7월부터 10월까지 전라북도에 위치한 전주천과 그 주변하천에서 7개 지점을 선정하여 토양층과 물의 Pb, Cu, Zn 및 Fe 등의 함량을 조사하였고 그 주변에 자생하는 고마리, 마름 및 노랑어리연꽃의 중금속 농축량과 부위별 중금속 농축량을 조사하였다. 그리고 재료식물내의 중금속 농축량과 서식지 토양의 중금속 함량과의 관계를 밝히기 위해 재료식물내의 중금속 함유량과 토양의 중금속 함량간의 상관계수를 조사하였다. 실험실 조건하에서 재료식물의 중금속 흡수경향을 조사하기 위해 재료식물 중 고마리를 선정하여 Pb, Cu 및 Zn 등을 여러 농도로 처리한 용액에 고마리의 뿌리부분을 침수하여 재배한 후 그농축량을 측정하였고, 그 결과를 7개 채집지에서 자생한 고마리의 중금속 농축량의 측정치와 비교 분석하였다. 7개 채집지에서 자생한 고마리의 부위별 중금속 농축량은 Pb와 Zn의 경우 줄기<잎<뿌리의 순서로 증가하였고 Cu와 Fe는 잎<줄기<뿌리의 순서로 증가하였으며, 중금별 농축량은 Pb$\leq$Zn의 순서로 증가하였다. 고마리의 배양 실험 결과, 서식지에서 조사된 결과인 잎과 줄기에서 Pb

• Korean Journal of Mineralogy and Petrology
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• v.35 no.3
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• pp.387-396
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• 2022

In this study, the removal efficiencies of heavy metals were evaluated using cockle, abalone, and scallop shells. Cockle, abalone, and scallop are composed mainly of aragonite, aragonite, and calcite, and calcite, respectively. The specific surface area of each shell varies from 2.7241 m²/g to 4.5481 m²/g and the order of that is scallop > abalone > cockle. All shells of cockle, abalone, and scallop had no As removal effect by adsorption and precipitation as pH increased. Pb was removed by all shell samples at initial reaction. Although the removal efficiency of Cd and Zn were depending on the reaction medium, that was increased in order of scallop > abalone > cockle. Heavy metal removal efficiency tends to be slightly higher for heated samples than with the raw materials, and higher as the specific surface area is larger.

• Journal of the Korea Organic Resources Recycling Association
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• v.9 no.2
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• pp.45-51
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• 2001

Mackban-stone effectively removed heavy metals, such as Fe, Cu, Cd, and Zn, with best removal of Fe and Cu. And the removal of heavy merals related with ion exchange of Ca. Mackban-stone is also an efficient deodorant of hydrogen sulfide and ammonia and inhibited the growth of E coli. The degradation rare of 4-nitropheno1 by Nocardioides sp. PNP101 and 2,4-dinitrophenol by Strain CJ1 and Rhodococcus sp. DNP 505 are increased by Mackbane-srone.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2004.04a
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• pp.135-138
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• 2004

본 연구는 중금속으로 오염된 폐수처리에 있어 친환경적 유기흡착제로서 휴믹물질의 활용성을 평가하기 위한 기초 연구로서 이탄(peat moss)으로부터 Humin을 분리 한 후, 중금속 이온(Cd(II),Cu(II))과의 흡착특성을 조사하였다. 이탄으로부터 추출한 peat-Humin의 함량은 94%이상을 나타냈으며, 분자의 작용기 특성은 일반 토양 휴믹물질(soil humic substance)과 유사하였다. peat-Humin과 중금속 이온(Cd(II),Cu(II))과의 흡착 반응은 5분내에 빠른 흡착형을 보였으며, pH 5-6에서 가장 높은 중금속 제거율을 보였다. pH 3의 산성조건에서도 50%정도의 제거율을 보였다. pH 5에서의 등온흡착 실험결과를 Freundlich 등온식에 적용하여 해석한 결과, 각의 중금속에 대한 peat-Humin의 흡착상수(Kf)는 Cd(II)이 8.07 그리고 Cu(II)가 4.56으로 나타났다.

• Korean Journal of Soil Science and Fertilizer
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• v.31 no.1
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• pp.61-66
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• 1998

An artificial zeolite was synthesized from bituminous coal fly ash by thermo-alkali treatment, $100{\pm}3^{\circ}C$ and 3.5 N NaOH solution for 24 hours, to develope new useful material in waste water treatment system. The artificial zeolite had much higher cation exchange capacity, $299cmol^+\;kg^{-1}$ and lower concentration of extractable heavy metals than bituminous coal fly ash. The higher the temperature and the longer the shaking time, the more Zn, Cu, Cd and Pb were sorbed chemically by the artificial zeolite. Shaking artificial zeolite and wastewater at $35^{\circ}C$ for 9 hours, the amount of sorbed heavy metals were $123.5g\;kg^{-1}$ for Zn, $164.7g\;kg^{-1}$ for Cu, $184.4g\;kg^{-1}$ for Cd and $350.6g\;kg^{-1}$ for Pb, respectively.

• Journal of the Korean GEO-environmental Society
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• v.15 no.12
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• pp.25-34
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• 2014

The objective of this study was to investigate the removal characteristics and the elimination mechanism of heavy metals in Acid Mine Drainage (AMD) using spherical-type porous Zeolite-StarFish ceramics (porous ZSF ceramics) packed in a continuous column reactor system. The average removal efficiencies of heavy metals in AMD were Al 98.7, As 98.7, Cd 96.0, Cu 89.1, Fe 99.5, Mn 94.4, Pb 96.3 and Zn 80.8 % during 110 days of operation time. The average removal capacity of porous ZSF ceramics for heavy metals were measured to be Al 21.76, As 1.52, Cd 1.27, Cu 3.41, Fe 44.83, Mn 3.48, Pb 2.36 and Zn $3.76mg/kg{\cdot}day$. The analysis results of mechanism using SEM, EDS and XRD exhibited that the porous ZSF ceramics could act as a multi-functional ceramics for the removal of heavy metals in AMD through the reactions of precipitation, adsorption and ion-exchange. The experimental results of column reactor system displayed that the porous ZSF ceramics would be a consistently efficient agent for the removal of heavy metals in AMD for a long term.

• Journal of Korean Society of Environmental Engineers
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• v.36 no.12
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• pp.851-857
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• 2014

Treatability of heavy metals in marine sediments contaminated with mainly organic matter was investigated on the basis of washing technology using oxidizers and surfactants. Sediment samples were collected at N area which expected for remediation project of contaminated marine sediment. For additives, hydrogen peroxide ($H_2O_2$) and Tween-80 were used at oxidizer and nonionic surfactant, respectively. In experiments, sediments was mixed with sea water at the ratio of 1 : 3 than $H_2O_2$ (1 M, 3 M, 4 M, 5 M) and Tween-80 (0.05%) were added. Samples were gathered at following reaction time (10, 20, 30, 40, 50, 60, 70, 80 min and 24 h). Total Organic Carbon (TOC) was 55.2% at the conditions of 5 M $H_2O_2+0.05%$ Tween-80 24 h. Hence total heavy metals were Cu 29.5%, Zn 42.3%, Cd 73.0% and bioavailable heavy metals were Cu 60.0%, Zn 77.7%, Cd 90.2% at the conditions of 5 M $H_2O_2+0.05%$ Tween-80 10 min. The correlations for between bioavailable metals (Cu, Zn, Cd) and TOC were significant (Cu, Zn, Cd; $r^2=0.94$, 0.85, 0.69, respectively).

• Journal of the Korean GEO-environmental Society
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• v.10 no.6
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• pp.61-68
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• 2009

The main objective of this study was to examine the removal of heavy metals from water by inflated vermiculites. The component of vermiculites was analyzed by XRF, and the concentration of metal ion was measured by ICP-AES. Serial batch kinetic tests and batch sorption tests were conducted to determine the removal characteristics for heavy metals in aqueous solutions. As a result, solution pH values of tests with the inflated vermiculites generally increased and then stabilized. Equilibrium pHs were generally established within 5 hrs. In addition, removal rates of inflated vermiculites were tested at the initial concentration of 3 mg/L. As a result, at equilibrium concentration, except for chromium (36.23%), Most of the heavy metals were effectively removed (96.08~98.54%). Finally, sorption data were correlated with both Langmuir and Freundlich isotherms. The Qmax obtained from Langmuir isotherm were determined to Pb $725.4mg\;kg^{-1}$, Cd $568.8mg\;kg^{-1}$, Zn $540.2mg\;kg^{-1}$, Cu $457.2mg\;kg^{-1}$ Cr $0.9mg\;kg^{-1}$ respectively. The results of the study indicate that inflated vermiculites can be properly used as an adsorbent for various heavy metals because of its outstanding removal rate.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2001.11a
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• pp.223-224
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• 2001

고온 소각공정은 산업용 및 가정용 폐기물의 처리시 부피의 현격한 감소뿐만 아니라 유해성 유기물을 무해한 형태로 전환시켜 주는 장점을 지니고 있다. 그러나 유해 중금속의 경우 소각공정 중 소멸되거나 새로이 생성되지 않고 화학적, 물리적 변형만 일어날 뿐, 그 유해성은 소멸되지 않고, 고온 휘발성 유해중금속의 경우 일부 환경으로 배출되므로 잠재적으로 심각한 대기오염원이 되고 있다(1990). 최근에는 이러한 고온 휘발성 중금속의 효과적인 제거를 위한 연구로 여러 가지 무기질 흡착제를 이용한 고온 흡착제거 연구가 활발히 이루어지고 있다(1998, 1999). (중략)

• The Journal of Engineering Geology
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• v.13 no.1
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• pp.29-50
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• 2003

Physicochemical Properties of acid mine water of the Chonam-ri Creek and the Sagok-ri Creek in the Kwangyang Au-Ag mine area were determined using geochemical approaches. Metal contamination (Cd, Cu, Pb, Zn) is more serious in the Chonam-ri Creek than in the Sagok-ri Creek. However, the contents of Al and Fe is higher in the Sagok-ri Creek. Such differences between the two creeks probably reflect the abundance and composition of ore minerals. The attenuation processes for acid mine water in both creeks were investigated. In the Chonam-ri Creek, a small retention pond which contains limestone plays an important role in the removal of heavy metals by adsorption or coprecipitation due to increase of pH. The capacity of metal scavenging in this pond depends on the seasonal variation of inflow volume. Reddish yellow precipitates sampled in the Chonam-ri Creek were analyzed by XRD, SEM-EDS, EPMA, and chemical decomposition. The precipitates mainly consist of goethite and are also enriched in Al, Mn, Cu and Zn. This inditates that precipitation of goethite is important for scavenging those trace elements, possibly due to adsorption or coprecipitation. In the Sagok-ri Creek, on the other hand, hydrologic mixing of uncontaminated tributaries results in removal of heavy metals with iron hydroxides precipitation due to the pH increase. The mechanisms proposed for metal attenuation at the confluence between contaminated mine water and uncontaminated tributary water are also explained by the property-property plots.