• Ocean and Polar Research
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• 제25권4호
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• pp.645-652
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• 2003

The coastal environment of King George Island is potentially subject to contamination by pollutants arising from station operations, such as emissions from fossil fuel burning, oil spills, waste disposal, etc. As a preparatory step to assess such impacts on the marine environment and living organisms of this island, two molluscan species (the bivalve Laternula elliptica and the gastropod Nacella concinna) were selected as biomonitors for metal pollution monitoring, and their baseline levels have been investigated for the past several years at King Sejong Station. In this review, variability of the baseline levels is discussed in relation to body size, tissue type, and sex. Natural elevations of some metals are also discussed with respect to the environmental characteristics of this region.

• 한국해양학회지
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• 제28권2호
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• pp.142-152
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• 1993

해양에 투기된 폐기물의 시공간적인 분포와 변화과정은 해양 물리학적 확산과 이 동, 생물학적 흡수 및 변환과정, 화학적 반응 및 상태변화등 여러 과정이 복합적으로 작용하여 일여난다. 이러한 폐기물의 해양투기가 해양생태계 및 환경보전에 미치는 여 러 가지 영향은 이에 대한 규제 및 적절한 운용을 통하여 원활한 해양생태 및 환경을 유지할 수 있도록 최소화되어야 한다. 해양투기의 최적화를 위하여서는 첫째, 생태학 적 배제원칙(biological exclusion)이 최우선적으로 고려되어야 하고 둘째, 생태계 및 수산자원 보존을 위하여 원활한 해수교환 및 물질확산이 극대화된 투기장소의 입지 선 정(hydrographic option)이 매우 중요하다. 둘째 로는 적법한 투기행위 및 적절한 투 기장 운용을 위한 감독 및 감시체제의 확립이 필요하다. 현재 우리 나라의 해양 폐기 물 투기는 초기의 단계에 있으나 최근 점차 요구되는 인접 해양국가 간의는 지역환경 협의체 구성 및 국가간 환경 부담 비용을 고려할 때 공해상의 해양투기는 더 이상 국 내적 문제가 아니므로 보다 신중한 해양투기 활동 및 타당성의 국토가 필요하다. 황해 에 위치한 투기장의 경우 현재까지의 관련자료를 검토할 때 적정 투기 규모 및 투기장 입지 선정, 그리고 불법 폐기물 투기가능성의 미비점에 대한 보완책이 필요한 것으로 사료된다.

• 생명과학회지
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• 제10권2호
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• pp.140-149
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• 2000

In order to utilize marine processing waste which would normally be discarded, cod liver protein was hydrolysed by ${\alpha}$-chymotrysin, and the hydrolysate was investigated for the new angiotensin I converting enzyme (ACE) inhibitor. Thy hydrolysate was separated into three major types, with molecular weight cut-off (MWCO) values less than 10 kDa, 5 kDa and 1 kDa of ultrafiltration membranes, respectively. ACE inhibitory peptides were isolated from the fractions passed through MWCO 1 kDa membrane, and purified by using ion-exchange chromatography on a SP-Sephadex C-25 column, gel filtration on a Sephadex G-15 column, and HPLC on an ODS column. The purity was identified with capillary electrophoresis. The amino acid sequences of two peptides were Met-Ile-Pro-Pro-Tyr-Tyr (IC50=10.9 ${\mu}$M) and Gly-Leu-Arg-Asn-Gly-Ile (IC50=35.0 ${\mu}$M)

• 한국지반공학회지:지반
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• 제13권1호
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• pp.85-100
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• 1997

지구 통계학적 방법을 이용하여 수도권 쓰레기 매립지 수리전도도의 비균질성에 대하여 분석하고 오염 이동해석을 실시하였다. 수리전도도는 가압 실내투수시험 자료와 현장 투수시험 자료를 이용하였고 지구통계학적 방법으로는 일반크리깅과 조건부 시뮬레이션 방법을 이용하였다. 그 결과 조건부 시뮬레이션에 의한 수리전도도의 비균질성이 일반크리깅에 의한 것보다 크게 나타났으며 비균질성이 큰 조건부 시뮬레이션에 의하여 구해진 수리전도도 상의 오염물이동성이 일반크리깅에 의하여 구해진 수리전도도 상의 이동 결과 보다 큰 것으로 나타났다.

• 한국해양공학회지
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• 제11권3호
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• pp.95-99
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• 1997

In these days, the pollution of marine environment near island at Korean coastal zone caused by the trash human waste and livestocks excreata become intensified. One of the most economic and efficient way to prevent this pollution problem is to set up island circulating incineration system. In this paper, the result of feasibility study on the application of turtle boat hull form to the incinerating vessel has been summarized especially for the resistance and course keeping point of view.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2004년도 추계학술대회
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• pp.272-273
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• 2004

Filter media are one of themost important choices when bilfiltration is applied. Filter media provide adsorbing microbes with available sites for residence and the residential cells grow to degrade or decompose target waste gases. Up to date, filter media were only qualitatively analyzed. As a quantitative approach to filter material for biofiltration, a simple model based on reaction kinetics and mass action law (Ottengraf's Model in 1983) was presented. Cork, zeolite, and granulated activated carbon were tested in terms of effective surface area, cell covered fraction of adsorbing sites, surface roughness, and pore size distribution. The cell covered fraction, surface roughness and hydrophilicity was found to be closely related to the efficiency of gas degradation in biofiltration. The cork was the best candidate for cell residence and growth in this work.

• Advances in nano research
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• 제14권3호
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• pp.273-284
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• 2023

Combating the worldwide environmental threat of plastic waste pollution has become a priority. Plastic pollution has the potential to impact land, rivers, and seas, since many marine and terrestrial organisms have perished as a result of plastic's non-biodegradability and soil dangers. For this consumption, it seems required to manufacture and use new renewable resources. Renewable materials for diverse applications have been created utilizing nanotechnology, which may replace conventional materials for children's activities and sports equipment. This study investigates and suggests that nanotechnology-based materials be replaced with conventional materials to save the environment in manufacturing equipment for children's physical activities. On the basis of the mechanical sciences, a stability study of the bending behavior of small-scale structures will be performed for the various recommended materials.

• Geomechanics and Engineering
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• 제33권3호
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• pp.291-299
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• 2023

Monitoring contaminants in waste landfills on a seabed is important because the leachate affects the marine ecosystem and facility stability. The objective of this study is to optimize a time-domain reflectometry (TDR) probe using different coating materials and several electrodes to estimate contaminants in saline soil. Copper concentrations ranging from 0 mg/L to 10 mg/L were mixed in 3% salinity water to simulate contaminants in the ocean environment. Epoxy, top-coat, and varnish were used as coating materials, and two to seven electrodes were prepared to vary the number and arrangement of the electrodes. Test results showed that the varnish stably captured the increase in copper concentration, while the other coating materials became insensitive or caused leakage current. In addition, a TDR probe with more electrodes exhibited stable and distinct electromagnetic signals. Thus, the TDR probe with seven electrodes coated with varnish was effectively used to estimate contaminants in saline soil.

• 수산해양기술연구
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• 제60권3호
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• pp.269-276
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• 2024

In response to the global interest and efforts towards reducing plastic use and promoting resource recycling, there is a growing need to establish methods for recycling discarded fishing gear. In Korea, various technologies are being developed to recycle discarded fishing gear, but significant technical and policy challenges still remain. In particular, biodegradable gill nets require a pre-treatment process to separate biodegradable materials from other substances and to remove salt before recycling. Therefore, this study aims to develop a pre-treatment device for recycling biodegradable gill nets and to evaluate the feasibility of recycling them.

• 유기물자원화
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• 제4권2호
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• pp.77-85
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• 1996

본 연구에서는 피혁슬러지의 부숙기간별 이화학적 변화를 측정하고 이를 근거로 지렁이의 생존율, 증체량, 부화율 등을 조사함으로서 지렁이를 이용한 안정화 및 처리, 처분 가능성을 평가하였다. 지렁이의 급이 조건에 적합한 피혁슬러지의 부숙기간은 산화환원전위(Eh), 알카리도에 대하여 각각 30일, 35일로 평가되었으며, 부숙기간동안 피혁슬러지의 pH 역시 초기 7.8에서 지렁이의 생육에 적합한 중성영역으로 점차 변화하는 경향을 보였다. 50일 부숙시킨 피혁슬러지의 이화학적 특성은 pH는 7.1, Eh는 85mV, 알카리도는 450ppm $CaCO_3$로 조사되었으며, 중금속함량은 여러 기준치를 만족하는 것으로 평가되었다. 50일 부숙시킨 피혁슬러지에서 지렁이 생존율은 $20{\sim}25^{\circ}C$의 생육온도에서 75%, 증체율은 230%, 부화율은 87%의 값을 보였다. 이상의 결과로부터 피혁슬러지는 최대 50일의 부숙기간을 거칠 경우 지렁이를 이용한 퇴비화가 가능한 것으로 평가되었다.