• 건축사
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• 1호통권154호
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• pp.55-64
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• 1982

• 상하수도학회지
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• 제35권3호
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• pp.205-225
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• 2021

Due to the large-scale production and use of synthetic chemicals in industralized countries, various chemicals are found in the aquatic environment, which are often termed as micropollutants. Effluents of municipal wastewater treatment plants (WWTPs) have been identified as one of the major sources of these micropollutants. In this article, the current status of occurrence and removal of micropollutants in WWTPs and their management policies and options in domestic and foregin countries were critically reviewed. A large number of pharmaceuticals, personal care products, and industrial chemicals are found in WWTPs' influent, and are only partially removed by current biological wastewater treatment processes. As a result, some micropollutants are present in WWTPs' effluents, which can negatively affect receiving water quality or drinking water source. To better understand and assess the potential risk of micropollutants, a systematic monitoring framework including advanced analytical tools such as high resolution mass spectrometry and bioanalytical methods is needed. Some Western European countries are taking proactive approach to controlling the micropollutants by upgrading WWTP with enahnced effluent treatment processes. While this enahnced WWTP effluent treatment appears to be a viable option for controlling micropollutant, its implementation requires careful consideration of the technical, economical, political, and cultural issues of all stakeholders.

• 상하수도학회지
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• 제36권2호
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• pp.59-79
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• 2022

Conventional wastewater treatment plants (WWTPs) do not fully remove micropollutants. Enhanced treatment of sewage effluents is being considered or implemented in some countries to minimize the discharge of problematic micropollutants from WWTPs. Representative enhanced sewage treatment technologies for micropollutant removal were reviewed, including their current status of research and development. Advanced oxidation processes (AOPs) such as ozonation and UV/H₂O₂ and adsorption processes using powdered (PAC) and granular activated carbon (GAC) were mainly discussed with focusing on process principles for the micropollutant removal, effect of process operation and water matrix factors, and technical and economic feasibility. Pilot- and full-scale studies have shown that ozonation, PAC, and GAC can achieve significant elimination of various micropollutants at economically feasible costs(0.16-0.29 €/m³). Considering the current status of domestic WWTPs, ozonation and PAC were found to be the most feasible options for the enhanced sewage effluent treatment. Although ozonation and PAC are all mature technologies, a range of technical aspects should be considered for their successful application, such as energy consumption, CO₂ emission, byproduct or waste generation, and ease of system construction/operation/maintenance. More feasibility studies considering domestic wastewater characteristics and WWTP conditions are required to apply ozonation or PAC/GAC adsorption process to enhance sewage effluent treatment in Korea.

• 한국콘텐츠학회논문지
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• 제20권11호
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• pp.525-533
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• 2020

본 연구는 10주간의 복합운동프로그램 참여가 산후비만여성들의 대사증후군관련인자(HDL-C, TG, Glucose, 혈압, 허리둘레) 및 아디포사이토카인(Leptin, Adiponectin)에 어떠한 영향을 미치는지 알아보았다. 연구대상자는 출산 후 40개월 이내 여성 총 14명으로 복합운동군 7명, 통제군 7명으로 배정하였다. 복합 운동 프로그램은 리듬운동을 적용한 유산소운동과 근력운동을 실시하였으며 주 2회, 80분간, 10주간 실시하였다. 자료처리를 위해 Mann Whitney U-test, Wilcoxon test, Spearman 상관분석을 실시하였다. 연구 결과, 대사증후군 관련인자에서 운동 실시 전, 후모든 항목에서 그룹 간 차이가 나타나지 않았다. 그룹 내 차이에서는 복합운동군에서 HDL-C 유의한 증가를 보였으며 TG, Glucose, 허리둘레에서는 유의한 감소를 나타냈고 통제군에서는 TG, Glucose에서 유의한 증가를 나타냈다. 아디포사이토카인의 결과를 보면, 그룹 내 차이에서만 복합운동군이 Adiponectin에서 운동 후 유의한 증가를 나타나냈다. 대사증후군 관련인자와 아디포사이토카인과의 상관을 보면 HDL-C, Glucose가 Adiponectin과 상관이 있는 것으로 나타났다.

• 한국콘텐츠학회논문지
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• 제21권12호
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• pp.264-274
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• 2021

본 연구의 목적은 웰빙관광만족도와 삶의 질사이에서 웰니스의 매개효과를 살펴보는 것이다. 웰빙관광이 삶의 질에 최근 웰빙관광이 증가하고 있음에도 불구하고 웰빙관광의 동기요인들을 통한 웰빙관광의 만족도가 삶의 질에 미치는 영향에 대한 연구 부족으로 인해 각 변인간의 영향 관계를 살펴보았다. 위와 같은 연구결과를 얻기 위하여 본 연구는 2021년 5월 10일부터 5월 21일까지 웰빙관광을 경험 해본 수도권 지역의 일반인 총 236명을 조사 대상으로 하였다. 연구결과는 다음과 같다. 첫째, 웰빙관광동기요인은 웰빙관광만족도에 긍정적인 영향을 미치는 것으로 나타났다. 둘째, 웰빙관광만족도는 삶의 질에 긍정적인 영향을 미치는 것으로 나타났다. 셋째, 웰니스는 웰빙관광만족도와 삶의 질 사이의 관계를 매개하는 것으로 나타났다. 본 연구의 시사점은 웰니스의 매개변수를 활용하여 웰빙관광이 삶의 질에 미치는 영향을 규명하는데 있다. 이를 통해 웰빙관광이 웰니스를 추구하는 웰빙관광객들에게 긍정적인 영향을 주어 삶의 질이 제고된다는 것을 확인하여 일상생활의 피로감이나 코로나 장기화로 인한 피로감을 해소하는데 웰빙관광이 효과적이라는 점을 밝혀냄으로서 웰빙관광 활성화에 기여하였다.

• 상하수도학회지
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• 제36권2호
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• pp.107-119
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• 2022

The frequent detection and occurrence of micropollutants (MPs) in aquatic ecosystems has raised public health concerns worldwide. In this study, the behavior of 50 MPs was investigated in three different domestic wastewater treatment plants (WWTPs). Furthermore, the Kruskal-Wallis test was used to assess the geographical and seasonal variation of MPs in the WWTPs. The results showed that the concentrations of 43 MPs ranged from less than 0.1 to 237.6 ㎍ L^-1, while other seven MPs including 17-ethynylestradiol, 17-estradiol, sulfathiazole, sulfamethazine, clofibric acid, simvastatin, and lovastatin were not detected in all WWTPs. Among the detected MPs, the pharmaceuticals such as metformin, acetaminophen, naproxen, and caffeine were prominent with maximum concentrations of 133.4, 237.6, 71.5, and 107.7 ㎍ L^-1, respectively. Most perfluorinated compounds and nitrosamines were found at trace levels of 1.2 to 55.3 ng L^-1, while the concentration of corrosion inhibitors, preservatives (parabens), and endocrine disruptors ranged from less than 0.1 to 4310.8 ng L^-1. Regardless of the type of biological treatment process such as MLE, A2O, and MBR, the majority of pharmaceuticals (except lincomycin, diclofenac, iopromide, and carbamazepine), parabens (except Methyl paraben), and endocrine disruptors were removed by more than 80%. However, the removal efficiencies of certain MPs such as atrazine, DEET, perfluorinated compounds (except PFHxA), nitrosamines, and corrosion inhibitors were relatively low or their concentration even increased after treatment. The results of statistical analysis reveal that there is no significant geographical difference in the removal efficacy of MPs, but there are temporal seasonal variations in all WWTPs.