• Title/Summary/Keyword: Organic pollution

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A Study on the Inflowing Pollution Load and Material Budgets in Hampyeong Bay (함평만의 유입오염부하량 및 물질수지에 관한 연구)

  • Kim, Jong-Gu;Jang, Hyo-Sang
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.22 no.1
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    • pp.1-10
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    • 2016
  • In this paper, an analysis of the inflowing pollution load of the rivers in Hampyeong bay showed the average organic matter pollution loads of BOD, COD, and TOC to be 79.7 kg-BOD/day, 144.06 kg-COD/day, and 93.0 kg-TOC/day, respectively. The inflowing organic matter pollution load was the heaviest in Sonbul dike, followed by Jupo bridge and Yangman complex. With regard to season, the load characteristics were outstanding in July, the rainy period in the summer. The average inflowing pollution loads of nutrients were 20.9 kg-DIN/day, 17.1 kg-DIP/day, 148 kg-TN/day, and 37.4 kg-TP/day A comparison of the inflowing nutrients loads for each river showed the load to be the heaviest in Yangman complex, followed by Baegok bridge and Jupo bridge. In the experiment on the material budgets of Hampyeong bridge conducted using a box model, the detention time of fresh water was found to be 52.4 days, with the bay displaying the characteristics of a so dissolved inorganic nitrogen (DIN) in the nutrients material budgets, ${\Delta}DIN$ values were found to be negative, indicating the tendency of consumption and open sea leak by photosynthesis to be higher than the nitrogen that flowed in. As for dissolved inorganic phosphorus (DIP), ${\Delta}DIP$ showed positive values, indicating a tendency for accumulation as the supply through organic matter decomposition, elution load of sediments, and inflowing load of the river turned out to be higher than the consumption by phytoplankton and outflow to open sea.

Geochemical Behavior and Pollution of Soils in Gwangju City (광주광역시 토양의 지화학적 거동 특성과 오염)

  • Shin, Sang-Eun;Kim, Joo-Yong;Oh, Kang-Ho
    • Journal of Environmental Impact Assessment
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    • v.14 no.6
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    • pp.415-425
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    • 2005
  • To examine the geochemical behavior and pollution of soils in Gwangju City, an analysis was carried out for pH, on the contents of metals, and organic carbon. Soil samples were taken from environs areas, industrial areas and downtown areas. The major factor controlling the behavior of metallic elements in the soil was chemical weathering of clay mineral in the environs areas, industrialization, and urbanization. Heavy metals including Cu, Pb and Zn were highly enriched for the samples from central part of downtown area. This indicated that the urbanization and the industrialization affected soil pollution. The results show that soil pollution in a metropolitan city which is caused by harmful heavy metals is severest in the center of the city. In consequence, it is inevitable that practical measures should be taken to prevent soil pollution expansion.

Estimating the Economic Value of Function for Public Benefits on Practice of Organic Farming - Using Choice Experiments (유기농업의 공익기능에 대한 경제적 가치 평가 -실험선택법을 적용하여-)

  • Yoo, Jin-Chae;Kong, Ki-Seo;Yeo, Sun-Sik;Seo, Myung-Chul
    • Korean Journal of Organic Agriculture
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    • v.18 no.3
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    • pp.291-313
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    • 2010
  • The objective of this paper is to apply choice experiment methods to estimate non-market value of organic farming and its policy implication. A preliminary survey shows that the attributes of organic farming are reduce environmental pollution, bio-diversity improvements, cultural diversity improvements and maintain local community, reduce green-house gas emissions, energy saving, landscape improvements and tax for organic farming improvement policy. Questionnaire was eight different choice sets presented to each respondent. Implicit values of the attributive levels of organic farming have been calculated into tax money costs per house. This paper compared the six feasible scenarios in terms of willingness to pay per year. This study is expected to contribute to government's organic farming policies and quantitative information related to practice of organic farming.

Evalution and Future of Organic Farming Development Projects at Local Government (일본의 현단위 유기농업육성사업의 평가와 발전방향)

  • 정만철
    • Korean Journal of Organic Agriculture
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    • v.11 no.1
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    • pp.21-37
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    • 2003
  • In 1992, HyoGo County in Japan itself established a guideline for the environment-friendly agriculture and have been propelling the environment-friendly agriculture as a major agricultural policy together with organic farming. This study focuses on the evaluation of the “organic farms' villages” projected by the County among other projects. The results indicate that the project results in several benefits such as decrease in chemical input use and environmental pollution, and enhancement in farmers' concerns on safety and environment. On the contrary. it shows that no economic benefits are anticipated in the short run with the organic farming. Therefore, it is necessary to consider economic incentives for farmers who adopt the organic practices to sustain farmers' income.

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A study on new treatment chemical for leather wastewater; I. Development of new organic coagulant (새로운 피혁폐수 처리제에 관한 연구; I. 새로운 유기 응결제의 개발)

  • Jung, Maeng-Joon;Lee, Chul-Jae;Han, Sung-Wook
    • Journal of the Korean Society of Industry Convergence
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    • v.9 no.4
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    • pp.323-330
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    • 2006
  • As the interest in environmental pollution resulting from recent industrial development is converging, wastewater treatment problem of dying processing is one of important pending issue. Usually, flow mediation earth and settling pond etc. of processing plant to handle water or wastewater. Mediation is the wastewater that flowed past settling pond than material of heavy particles, water weight colloid particles that big solids are removed but are suspensibility material settlement exclusion impossible. So, we need flocculation and coagulation action to remove materials from this colloid state. For flocculation and coagulation action chemical agents to add back, addition of chemical agents forms floc of could settle size. That is, shorten the sedimentation time and quality of processing water because promoting sedimentation doing to do fines or suspended solids and colloid can materials large size and also, flocculation to annex efficiency of filtration augment. Therefore, I executed this research to prove that improving organic matter and chromaticity of treated water of processing epochally using organic coagulant informed positive ion co-polymerization superior in color wastewater through this research.

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Implication to Ecosystem Assessment from Distribution Pattern of Subtidal Macrobenthic Communities in Nakdong River Estuary (낙동강 하구 조하대 저서동물 군집분포에 따른 생태계 평가 적용)

  • Yoon, Kon-Tak;Park, Heung-Sik;Chang, Man
    • The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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    • v.16 no.4
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    • pp.246-253
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    • 2011
  • In this study, we investigated the effect of freshwater discharge on benthic community in Nakdong estuaries. The sediment was dominated by sand except few channels where heterogenetic sediment composition was observed. Sediment composition was rarely affected by freshwater discharge during the rainy season; however, organic content in the sediment slightly increased after the rainy season. Macrobenthic species composition differed spatially. For instance, species composition decreased after the rainy season near the barrage. Benthic community analysis revealed three groups, in which the first group was found between barrage and sand bars located at the mouth of estuary, the second group was observed outside the sand bars, and the last group was found in the channel. Opportunistic benthic species indicative of organic pollution, such as Sinocorophium sinensis, Magelona japonica, and Heteromastus filiformis, dominated areas close to the barrage. Organic pollution by freshwater discharge appears to be responsible for the emergence of opportunistic benthic species, and this influenced areas from the mouth of bay to sand bars. Outside the sand bars, freshwater discharge did not seem to have affected species composition.