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- 저자 : 김강주(Kang Joo Kim) (검색결과 20 건)
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하수도처리장 처리수를 이용한 하천 유량측정 가능성 연구
김강주(Kang Joo Kim),이지선(Ji Sun Lee),오창환(Chang Whan Oh),황갑수(Kab Soo Hwang),유재연(Jae Yeon Yu),김진삼(Jin Sam Kim),여성구(Seong Ku Yeo),김영규(Yeong Kyoo Kim),이광식(Kwang Sik Lee) 한국물환경학회 2001 한국물환경학회지 Vol.17 No.1
The goal of this study is to evaluate the possibility of using the chemical species dissolved in the WTP effluent as tracers for stream flow measurements. For this study, the effluents from Chonju WTP and the nearby streams were sampled and analyzed twice in the summer of 1999. It was revealed that the water chemistry of the effluent is distinct relative to the stream waters, especially, in concentrations of inorganic anions. The chemistry of those streams was strongly influenced by mixing with the treated water being discharged from the plant. Because of this reason. the conservative species such as chloride, sulfate, and EC were linearly correlated with high r² values. However, alkalinity and nitrate did not show such a relationship with respect to the conservative species, indicating modification of their concentrations by various chemical reactions. In this study, Streams flows were calculated by observing water chemistry of streams lower than the discharge point of Chonju WTP. The stream flows estimated from the chloride and sulfate concentrations, and EC were nearly the same at least for the immediate downstream of the discharge point. This consistency indicates the validity of the method suggested in this study.
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김강주 ( Kang Joo Kim ),이은규 ( Eung Yu Lee ),이재철 ( Jae Cheol Lee ),황수연 ( Soo Yeon Hwang ),김창현 ( Chang Hyeon Kim ) 한국광물학회 2012 광물과 암석 (J.Miner.Soc.Korea) Vol.25 No.2
The leaching of Li from fly ashes was studied. The fly ash produced from the Taean electric power plant of the Korea Western Power Co., Ltd. was used for this study. The Li leaching was observed according to the changes in solid:solution ratio, solution types (seawater or deionized water), and the CO2 condition in the atmosphere. The results showed that the Li concentrations in the solution increased continuously as the solid:solution ratio increased. The Li leaching per unit mass of fly ash was greater when the deionized water was used for the experiment and when the CO2 dissolution is limited during the reaction because the precipitation of CaCO3 is suppressed under those conditions. At high solid:solution ratio, Mg 2+ , the ion preventing the Li extraction from seawater by adsorption, was effectively removed from the seawater.
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하수처리장 방류수를 이용한 추적자 시험: 만경강 유역에 대한 사례 연구
김진삼,김강주,한찬,황갑수,박성민,이상호,오창환,박은규,Kim Jin-Sam,Kim Kang-Joo,Hahn Chan,Hwang Gab-Soo,Park Sung-Min,Lee Sang-Ho,Oh Chang-Whan,Park Eun-Gyu 한국해양학회 2006 바다 Vol.11 No.2
본 연구에서는 도시하수처리장 방류수를 하천연구용 추적자로 이용할 수 있는지 여부를 검토하였다. 이 같은 연구는 전주하수처리장 처리수 방류지점 하류 12 km구간에 대해서 수행 되었다. 연속 수질조사 결과 당 하수처리장 방류수의 수질은 조사기간 동안 비교적 넓은 범위에서 변화되고 있음이 관찰되었다. 특히 염소이온농도, 황산이온농도, 총양이온 농도, 전기전도도 등과 같은 변수들은 하수처리장 방류수에서의 수질변화 양상이 방류지점 하류의 관측지점들에서도 시간차이를 두고 순차적으로 관찰되었으며, 이러한 관측결과를 바탕으로 하천의 유속(v), 유량(Q), 수리분산계수(D) 값을 유추해 낼 수 있었다. 본 연구를 위해서는 1차원 비반응성 이산-분산 모델을 자동최적화 기법으로 역산하는 방법이 이용되었다. 이 같은 방법을 통하여 추산된 최하류 지점의 유량은 조사기간동안 6.4에서 $9.0m^3/sec$ 까지 변화되는 것으로 나타났으며, 유속은 조사구간내에서 0.06에서 0.10 m/sec까지, 수리분산계수는 0.7에서 $6.4m^2/sec$까지 변화되는 것으로 나타났다. 본 연구결과는 대도시의 대규모하수처리장이 수문연구에 적합한 추적자들을 제공해줄 수 있다는 점을 보여 주는 것이다. We investigated the possibility of using effluents from a municipal sewage treatment plant (STP) as tracers a tracer for hydrologic studies of rivers. The possibility was checked in a 12-km long reach downstream of Jeonju Municipal Sewage Treatment Plant (JSTP). Time-series monitoring of the water chemistry reveals that chemical compositions of the effluent from the JSTP are fluctuating within a relatively wide range during the sampling period. In addition, the signals from the plant were observed at the downstream stations consecutively with increasing time lags, especially in concentrations of the conservative chemical parameters (concentrations f3r chloride and sulfate, total concentration of major cations, and electric conductivity). Based on this observation, we could estimate the stream flow (Q), velocity (v), and dispersion coefficient (D). A 1-D nonreactive solute-transport model with automated optimization schemes was used for this study. The values of Q, v, and D estimated from this study varied from 6.4 to $9.0m^3/sec$ (at the downstream end of the reach), from 0.06 to 0.10 m/sec, and from 0.7 to $6.4m^2/sec$, respectively. The results show that the effluent from a large-scaled municipal STP frequently provides good, multiple natural tracers far hydrologic studies.
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만경강유역 충적대수층 지하수의 비소오염현황 및 지구화학적 특성
문정태,김강주,김석휘,정천성,황갑수,Moon, Jeong-Tae,Kim, Kang-Joo,Kim, Seok-Hwi,Jeong, Cheon-Sung,Hwang, Gab-Soo 대한자원환경지질학회 2008 자원환경지질 Vol.41 No.6
As-rich alluvial groundwaters occurring in the agricultural area of Mankyeong River watershed were geochemically studied. 15 out of 29 investigated wells (52%) showed As levels exceeding the WHO drinking water standard ($10{\mu}g/L$). Their chemistry is characterized by low Eh levels, low $NO_3$ and $SO_4$ concentrations, and high pH, alkalinity, Fe, $NH_4$, and $PO_4$ levels. This suggests that arsenic is enriched by the reductive dissolution of As-bearing Fe-/Mn-(hydro)oxides, the commonest process in Bangladesh and West Bengal of India, of which groundwaters are severely contaminated by As. It was also revealed that As concentrations in the area are strongly regulated by the presence of agrochemicals such as $NO_3$ and $SO_4$.
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MMPH-0 (Enterobacter aerogenes)에 의한 6가 크롬 오염 지하수의 생지화학적 정화
서현희,이성근,김강주,박은규,김영규,전철민,문지원,노열,Seo, Hyun-Hee,Rhee, Sung-Keun,Kim, Kang-Joo,Park, Eun-Gyu,Kim, Yeong-Kyoo,Chon, Chul-Min,Moon, Ji-Won,Roh, Yul 대한자원환경지질학회 2012 자원환경지질 Vol.45 No.2
Indigenous bacteria isolated from contaminated sites play important roles to remediate contaminated groundwater. Chromium has the most stable oxidation states. Cr(VI) is toxic, carcinogenic, and mobile, but Cr(III) is less toxic and immobile. In this study, indigenous microorganism (MMPH-0) was enriched from Cr(VI) contaminated groundwater, and identified by 16S rRNA gene analysis. Using MMPH-0, the effect of stimulating with e-donors (glucose, lactate, acetate, and no e-donor control), respiration conditions, biomass, tolerance, and geochemical changes on Cr(VI) reduction were investigated in batch experiments for 4 weeks. The changes of Cr(VI) concentration and geochemical conditions were monitored using UV-vis-spectrophotometer and Eh-pH meter. And the morphological and chemical characteristics of MMPH-0 and precipitates in the effluents were characterized by TEM-EDS and SEM-EDS analyses. MMPH-0 (Enterobacter aerogenes) was able to tolerate up to 2000 mg/L Cr(VI) and reduce Cr(VI) under aerobic and anaerobic conditions. MMPH-0 performed faster and higher efficiency of Cr(VI) reduction with electron donors (over 70% after 1 week with e-donor, 10-20% after 4 weeks without e-donor). The changes of Eh-pH in effluents showing the tendency from oxidizing to reducing condition and a bit of acidic change in pH due to microbial oxidation of organic matters donating electrons and protons suggested the roles of MMPH-0 on Cr(VI) in the contaminated water catalyzing to transit geochemical stable zone for more stable $Cr(OH)_3$ or Cr(III) precipitates. TEM/SEM-EDS analyses of MMPH-0 and precipitates indicate direct and indirect Cr(VI) reduction: extracellular polymers capturing Cr component outside cells. These results suggested diverse indigenous bacteria and their biogeochemical reactions might enhance more effective and feasible remediation technology of redox sensitive heavy metals in metal-contaminated in groundwater.
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이산화탄소 저감을 위한 지중처분기술의 지구화학적 개념과 연구개발 동향
채기탁,윤성택,최병영,김강주,Chae, Gi-Tak,Yun, Seong-Taek,Choi, Byoug-Youg,Kim, Kang-Joo,Shevalier, M. 대한자원환경지질학회 2005 자원환경지질 Vol.38 No.1
Carbon dioxide ($CO_2$) is the greatest contributor among the major greenhouse gases covered by the Kyoto Protocol. Therefore, substantial efforts for the control and reduction of $CO_2$ emissions, including increased efficiency of fossil fuel energy usage, development of energy sources with lower carbon content, and increased reliability on alternative energy sources, are being performed worldwide. However, development and industrial application of $CO_2$ sequestration techniques are needed to meet the requirements of the Kyoto Protocol. Among the $CO_2$ sequestration methods developed, geological sequestration methods such as the storage in deep aquifers, deep coal seams and oil and gas reservoirs and the mineral carbonation is considered most favorable because of its stability and environmental effectiveness. In this review, geochemical concepts and technologic development of geologic sequestration technology, especially the storage in deep aquifers and the mineral carbonation, are discussed. The weakness and strengths for each of geologic sequestration methods, are also reviewed.
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황갑수(Gap Soo Hwang),김강주(Kang Joo Kim),신형선(Hyung Seon Shin),여성구(Sung Koo Yeo),김진삼(Jin Sam Kim) 한국물환경학회 2001 한국물환경학회지 Vol.17 No.2
This study was carried out to investigate heavy metal contamination in the burrowing mussels. So1en strictus Gould, from coastal tidal flat in Western coast. Korea and to clarify the biological availibility of heavy metals according to shell size. The sizes of the collected mussels were linearly related to their dry weights of soft parts. The heavy metal levels of the mussels decrease as their dry weights increase. Only Cd levels were the exception indicating its relatively strong tendency of accumulation in organisms. The mussels sampled from a site (S5) showed considerably higher concentration levels than those from elsewhere. However, the mussels from a nearby site (S6) that is about 200m apart from S5 to the north did not show such high levels. Statistical analysis showed that Cr and Ni (Cu and Zn) levels in the mussels are strongly correlated with each other.
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국내 모 유연탄 발전소의 석탄회 매립 염호수 내 미량원소 농집에 대한 지구화학적 연구
김석휘 ( Seok Hwi Kim ),최승현 ( Seung Hyun Choi ),정기영 ( Gi Young Jeong ),이재철 ( Jae Cheol Lee ),김강주 ( Kang Joo Kim ) 한국광물학회 2014 광물과 암석 (J.Miner.Soc.Korea) Vol.27 No.1
In present study, we geochemically investigated the fresh coal ashes and the saline ash pond of an electric power plant in Korea, which burns imported bituminous coals. The goals are to see the chemical changes of the ash pond by reaction with coal ashes and to investigate the relative leach ability of elements from the ashes by reaction with saline waters. For this study, one fresh fly ash, one fresh bottom ash, and 7 water samples were collected. All the ash samples and 2 water samples were analyzed for 55 elements. The results indicated that the fly ashes are enriched with chalcophilic elements such as Cu, Zn, Ga, Ge, Se, Cd, Sb, Au, Pb, and B relative to other elements. On the other hand, concentrations of As, Ba, Co, Ga, Li, Mn, Mo, Sb, U, V, W, and Zr are much higher in the ash pond than those dissolved in the seawater. Ag, Bi, Li, Mo, Rb, Sb, Sc, Se, Sn, Sr, and W show high ratios of elemental concentrations in pond water to those in the fly ash. Our results imply that the leaching of trace elements is regulated by geochemical controls such as solubility and adsorption even though the trace elements are relatively enriched on the ash surfaces after the coal combustion due to their volatilities.
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