• 대한환경공학회지
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• 제34권11호
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• pp.751-756
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• 2012

본 연구에서는 인천북항 인근 Pb, Zn 및 Cu로 오염된 해양퇴적물에 대하여 산업부산물인 적니와 굴패각을 안정화제로 선정하여 안정화 처리를 수해하였다. 안정화제는 적니와 굴패각으로 오염토 함량대비 각각 5%, 10%, 15%를 사용하여 15일간 습윤양생 하였다. 연속추출 실험결과를 통해 미처리오염퇴적물에서 큰 비중을 차지하고 있었던 산화물 형태와 유기물 형태 중금속이 안정화제에 의해 유기물 형태 및 잔류물 형태로 안정화되고 있음을 알 수 있었다. 또한, 안정화효율 평가를 위해 TCLP를 수행한 결과, 대조군과 비교해서 안정화 처리 퇴적물인 경우 중금속의 용출량이 확연하게 감소한 것을 확인할 수 있었다. 이러한 결과로부터, 산업부산물을 이용한 안정화제가 오염퇴적물처리에 활용 가능함을 나타내고 있다.

• 수산경영론집
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• 제40권3호
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• pp.29-49
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• 2009

There are various types of predictable economic benefits to restoring beneficial uses from contaminated marine sediment cleanup. These benefits can be derived from reduction in aquatic animals died or infected, increase in their consumption recovery, increase in tourism including recreational fishing, reduction in human health risk, increase in amenity and aesthetics, increase in ecosystem integrity, and so on. The paper focuses on estimating the net increase in value for producers and consumers from producing and consuming those fish due to the pollution reduction of marine contaminated cleanup project. Almost Ideal Demand System(AIDS) is employed for estimate of the demand for fish, and the production cost function for fish are determined using market data. The result shows 10.8 billion won per year for economic surplus to the net increase for producers and consumers.

• 한국항해항만학회지
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• 제38권6호
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• pp.655-661
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• 2014

본 연구에서는 해양오염퇴적물 내 Ni, Cu, Pb 및 Zn 등 중금속에 대하여 벤토나이트를 이용한 안정화 처리를 수행하였다. 안정화 실험은 해양오염퇴적물에 벤토나이트 첨가 후 150일간 습윤 양생 하여 실시하였다. 중금속 연속추출 결과로부터, 미처리 오염퇴적물과 비교해서 Ni, Cu, Pb 및 Zn은 용이하게 용출가능한 존재형태(이온교환, 탄산염, 산화물 형태)가 벤토나이트에 의해 각각 8.5%, 5.6%, 19.2% 및 28.2% 감소하였다. 또한, 안정화제 의한 오염퇴적물의 용출저감 평가를 위해 TCLP(Toxicity Characteristic Leaching Procedure)를 수행한 결과, 미처리 오염퇴적물과 비교하여 안정화 처리 퇴적물인 경우 중금속의 용출량이 각각 Ni 95.7%, Cu 96.8%, Pb 99.2%, Zn 85.9%씩 크게 감소하는 것을 확인하였다. 이러한 결과로부터, 벤토나이트를 해양오염퇴적물의 피복소재로 사용할 경우 시험 대상 중금속의 안정화 효과가 확인되었다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2015년도 춘계학술대회
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• pp.179-180
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• 2015

The variety of organic and inorganic pollutants are introduced to coastal sediment and making highly contaminated due to rapid development of industralization and economic development. Numerous contaminants are release into marine sediment and it significantly affect marine aquatic environment. In the present study stated the optimize the biostimulant ball (BSB) in coastal sedimentand stabilse the heavy metals present in the sediment. The effective variables like BSB size, distance and month variables on Cu stabilization was determined by using Response surface methodology(RSM). The analysis of variance (ANOVA) and coefficient determination (R2) of Cu reduction 0.9610 and maximum stabilisation was obtained in 3cm ball size and 5.5cm distance and 4 month interval time. This result revealed that the BSB in effective for Cu reduction in coastal sediment.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2014년도 추계학술대회
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• pp.87-88
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• 2014

The Coastal sediment is highly contaminated due to ship transportation, industries discharges and urban sources. Various contaminants release into seawater and settle in marine sediment and it significantly affect marine eco system. In the present study evaluated the optimization of slow release biostimulant ball (BSB) in coastal sediment in busan. The effective variables like BSB size, distance and month variables on VS reduction was determined by using Response surface methodology(RSM). The analysis of variance (ANOVA) and coefficient determination (R2) of VS was 0.9369 and maximum reduction of VS was obtained in 3cm ball size and 5.5cm distance and 4 month interval time. This result revealed that the BSB in effective VS reduction in coastal sediment.

• 한국농공학회논문집
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• 제57권4호
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• pp.31-38
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• 2015

This study aims to assess the effectiveness of limestone, zeolite, and crushed concrete as capping material to block the release of heavy metals (As, Cu, Cr, Ni, and Pb) and reduce the sediment oxygen demand. The efficiency of limestone, zeolite, and crushed concrete was evaluated in a reactor in which a 1-cm thick layer of capping materials was placed on the sediments collected from Inchon north harbor. Dissolved oxygen concentration and heavy metal concentration in seawater above the uncapped sediments and capping material were monitored for 17 days. The sediment oxygen demand was in the following increasing order: crushed concrete ($288.37mg/m^2{\cdot}d$) < zeolite ($428.96mg/m^2{\cdot}d$) < limestone ($904.53mg/m^2{\cdot}d$) < uncapped ($981.34mg/m^2{\cdot}d$). The capping materials could reduce the sediment oxygen demand by blocking the release of biochemical matters consuming dissolved oxygen in seawater. It was also shown that zeolite and crushed concrete could effectively block the release of Cu, Ni, and Pb but those were not effective for the interruption of As and Cr release from marine contaminated sediments.

• 한국항해항만학회지
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• 제38권3호
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• pp.269-275
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• 2014

본 연구에서는 제강슬래그를 이용하여 수용액상에서 혼합 중금속의 흡착능을 평가하였다. 게다가, 제강슬래그를 안정화제로 활용하여 해양오염퇴적물 내 Ni, Zn, Cu, Pb 및 Cd에 대하여 중금속 안정화 실험을 수행하였다. 중금속 흡착 특성은 Freundlich 및 Langmuir 방정식을 이용하여 해석하였으며, 평형흡착 실험결과는 Langmuir 모델에 잘 부합되었고 $Pb^{2+}$ > $Cd^{2+}$ > $Cu^{2+}$ > $Zn^{2+}$ > $Ni^{2+}$순으로 평형흡착량이 많았다. 안정화 방법은 오염퇴적물에 제강슬래그 첨가 후 150일간 습윤 양생 하였다. 연속추출 실험결과로부터, 미처리 오염퇴적물과 비교해서 Ni, Zn, Cu, Pb 및 Cd의 이온교환, 탄산염, 산화물 형태는 제강슬래그에 의해 각각 13%, 6.0%, 1.3%, 17% 및 50% 감소하였다.

• Environmental Engineering Research
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• 제25권3호
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• pp.274-280
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• 2020

The marine sediment sustains from the anoxic condition due to increased nutrients of external sources. The nutrients are liberated from the sediment, which acts as an internal source. In hypoxic environments, anaerobic respiration results in the formation of several reduced matters, such as N₂ and NH₄⁺, N₂O, Fe²⁺, H₂S, etc. The experimental results have shown that nitrogen and sulfur played an influential, notable role in this biogeochemical cycle with expected chemical reductions and a 'diffusive' release of present nutrient components trapped in pore water inside sediment toward the bulk water. Nitate/ammonium, sulfate/sulfides, and ferrous/ferric irons are found to be the key players in these sediment-waters mutual interactions. Organonitrogen and nitrate in the sediment were likely to be converted to a form of ammonium. Reductive nitrogen is called dissimilatory nitrate reduction to ammonium and denitrification. The steady accumulation in the sediment and surplus increases in the overlying waters of ammonium strongly support this hypothesis as well as a diffusive action of the involved chemical species. Sulfate would serve as an essential electron acceptor so as to form acid volatile sulfides in present of Fe³⁺, which ended up as the Fe²⁺ positively with an aid of the residential microbial community.

• Fisheries and Aquatic Sciences
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• 제13권3호
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• pp.244-253
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• 2010

The quality of marine sediments from the industrialized coastal areas of Korea (Ulsan Bay, Masan Bay, and artificial Lake Shihwa) was investigated using a bacterial bioluminescence toxicity test. Sediment toxicity results were compared with the levels of chemical contamination (trace metals, organic wastewater markers, acid volatile sulfides, total organic carbon). Effective concentration 50% (EC50) of sediments ranged from 0.014 to 1.126 mg/mL, which is comparable to or lower than values in contaminated lakes, rivers, and marine sediments of other countries. Sediment reference index (SRI) ranged from 13 to 1044, based on the EC50 of the negative control sample. Mean average SRI values in Masan Bay and Lake Shihwa were approximately 8 and 9 times as high as that in Ulsan Bay, indicating higher sediment toxicity and greater contamination in the two former regions. Sediment toxicity were strongly associated with the concentrations of some chemicals, suggesting that this test may be useful for determining potential chemical contamination in sediments.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2016년도 춘계학술대회
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• pp.130-131
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• 2016

Although many metals contaminated sediment from coastal area contain both anionic and cationic heavy metals, the current remediation technologies are not effective for stabilize heavy metals of both anionic and cationic elements from contaminated coastal region. the present work investigated the efficiency and mechanism of immobilization of Fe, Zn, Cr, Cu, Pb and Cd metal solutions in modified zeolite based biostimulant ball. Biostimulant ball containing acetate, nitrate and sulphate which are enhance the activity of marine microorganisms and it can act as electron donors and electron acceptors. Modified zeolite and chelating agent is greatly enhance the metal stabilization due to increased immobility of the analysed metals. The XRD, FT-IR and SEM of modified zeolite which cheating agents containing heavy metals were investigated. The results indicated that heavy metals could be effectively immobilized in modified zeolite and chelating agents in BSB added sediment. The immobilization of heavy metals in modified zeolite and chelating agents along with BSB could be due to stabilize of heavy metal cations. Immobilization of heavy metals using BSB with modified zeolite and chelating agent has lower cost effect and enhance the sediment quality.