• Journal of Korean Society of Environmental Engineers
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• v.31 no.11
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• pp.975-982
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• 2009

The purpose of this study is to offer informations about the current conditions and basic data of stream sediments in Busan city. So we first select 14 urban streams and collect sediment samples. Then, COD, proximate analysis, volatile solid, organic carbon content and elemental analysis were conducted to determine characteristics of the sediments. Results show that COD, volatile solid, Organic carbon content, T-N of sediment are determined in the range of 1.20~75.07 mg/g, 0.19~11.54%, 0.23~34.21% and 0.76~3.46%, respectively. Analysis data of sediments were compared with USEPA sediment quality standards and ontario sediment quality guidelines. As a result, when compared with COD, volatile solid and organic carbon content values, Bosucheon and Gudeokcheon are relatively heavily contaminated than the remainder sampling sites. But when compared with T-N values, all of sites were evaluated as seriously contaminated. Finally, for the determination of the correlations between sediment COD and moisture contents, ash contents, volatile solid, total organic carbon, total nitrogen and total carbon, linear model was fitted to the data using a least-squares algorithm. As a result, Linear model was well fitted to each data with good values of the correlation coefficient (r=0.9664~0.8501).

• Journal of the Korean Society of Marine Environment & Safety
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• v.13 no.1 s.28
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• pp.93-102
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• 2007

Particle materials sink in bottom and dissolved inorganic substances release from sediment and many kinds of materials continuously exchange in sediment and water column as well as transfer and transformation in sediment. The study of sediment quality means the state of sediment pollution relation of the water quality, sediment biota, materials fluxes between sediment and water column, transformation of materials in sediment is being important in recent. The state of sediment quality imply that the history of water pollution for long time, because the sediment quality does not change temporally. The sediment quality of bottom water can be used as a good indicator of pollution at present and in future. The major index of sediment qualities are the content of nutrients and hazard materials such as metals, Ignition Loss (IL), Total Sulfur (TS), Oxidation Reduction Potential (ORP), sediment COD, color, odor and the release of nutrients from sediment. However, there are some arguments between researchers about compare to estimation of sediment quality and sampling and analysis of sediment. In this study, I will introduce the method of sediment sampling, analyzing and estimating of the sediment pollution.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.30 no.5
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• pp.201-206
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• 2018

This study investigated the changes in pore water quality of polluted sediment by mixing ratio of granulated coal ash. The mesocosm experiments were carried out with 0%, 10%, 30% and 50%, respectively, of the material mixture ratio relative to the sediments. According to the results of the experiments, pH increased depending on the mixing ratio. Phosphate and ammonia concentrations were significantly decreased in the mixing ratio of 30% and 50% compared to the control (p < 0.05). The concentration of hydrogen sulfide was reduced by 72% at the mixing ratio of 10%, and it was not detected at the mixing ratio of 30% and 50%. This study was confirmed that granulated coal ash can change the pore water quality of polluted sediments in proportion to the amount of material. However, the effect of the mixing ratio between 30% and 50% was not significantly different, thus it is concluded that mixing of 30% of the volume of the sediment is economically feasible.

• Proceedings of the KSEEG Conference
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• 2005.04a
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• pp.196-199
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• 2005

• Proceedings of the KSEEG Conference
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• 2007.04a
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• pp.379-381
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• 2007

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.133-134
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• 2000

최근 한국의 연안해역은 육상으로부터 오염물질의 다량유입과 자가오염으로 인하여 빈산소 수괴가 형성되고 있을 뿐만 아니라, 영양염류의 용출량 증가에 따라 부영양화가 가속화되고 있는 실정이다. 특히, 양식어장으로 장기간 사용되고 있는 내만 해역의 해저 퇴적물 오염은 적조발생과 같은 2차적인 문제를 야기 시키고 있어 해양환경 보존 및 수산생물 생산에 커다란 장해가 되고 있다. (중략)

• Proceedings of the KSEEG Conference
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• 2003.04a
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• pp.89-92
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• 2003

폐금은광산 지역은 토양, 작물 및 수계와 같은 지구화학적 환경에서의 비소의 부화가 환경오염의 특성으로 나타난다. 오염지역에 대한 시료채취 지점 상부에 존재하는 암석과 토양의 풍화산물인 하상퇴적물을 대상으로 하는 연구는 이들의 해당 집수지역에 존재하는 원소들의 평균 함량을 반영하므로 환경오염평가 및 광역지구화학도의 작성에 적절한 대상 시료로 사용되어 왔다. (중략)

• Proceedings of the KSEEG Conference
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• 2003.04a
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• pp.219-222
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• 2003

폐광된 서보광산 주변의 주요 중금속 오염원으로는 폐광석과 과거에 선광을 하였던 시설 부근에 방치되어 있는 광미를 들 수 있다 과거 선광시설 주변에서 채취한 광미에는 황화광물이 다량으로 함유되어 있어 계속 방치되어 있을 경우에는 장마 기간동안 유실되어 하천 퇴적물을 크게 오염시키는 원인이 될 수 있다. 또한, 이 광미에 다량으로 함유되어 있는 황화광물이 산화작용을 받을 경우, 용해된 중금속 원소가 주변 토양 혹은 하천퇴적물 오염의 원인이 될 수 있다. (중략)

• Journal of Navigation and Port Research
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• v.38 no.3
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• pp.269-275
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• 2014

In this study, the adsorption efficiency of mixed heavy metals in aqueous solution was investigated using steel slag. Moreover, heavy-metal stabilization treatment of contaminated marine sediment was achieved using steel slag as stabilizing agents. Heavy metal adsorption was characterized using Freundlich and Langmuir equations. The equilibrium adsorption data were fitted well to the Langmuir model in steel slag. The adsorption uptake of heavy metals were higher in the order of $Pb^{2+}$ > $Cd^{2+}$ > $Cu^{2+}$ > $Zn^{2+}$ > $Ni^{2+}$. The steel slage was applied for a wet-curing duration of 150 days. From the sequential extraction results, the exchangeable, carbonate, and oxides fractions of Ni, Zn, Cu, Pb, and Cd in sediment decreased by 13.0%, 6.0%, 1.3%, 17.0%, and 50.0%, respectively.

• Journal of the Korean Society for Marine Environment & Energy
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• v.2 no.1
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• pp.26-33
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• 1999

Coastal sediments in polluted areas adsorb many hydrophobic pollutants such as PCBs. During environmental remediation projects like dredging, they can be resuspended and transported to less polluted areas. To assess the environmental impact, the author previously developed a mathematical model that can simulate the changes of particle size distribution (PSD) due to sedimentation, vortical dispersion and coagulation. In this research, the simulation results using this model were presented in conjunction with observed PSDs from a 2-m settling column simulating coastal environments. The simulations showed that the model predictions were in fairly good agreement with the observed data (changes of PSDs in terms of depths and times), and that the resuspended sediments coagulated during the vertical transport. So, this study showed that the developed model has a good ability to describe the very complicated phenomena of real aggregation and vortical transport dynamics of coastal sediments with various particle sizes.