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H : 소장처정보

T : 목차정보

韓國環境保健學會誌 = Journal of environmental health scienc...韓國環境保健學會誌 = Journal of environmental health sciences 10건

  1. [국내논문]   미생물 연료전지의 원리 및 환경보건 분야로의 응용   피인용횟수: 4

    한선기 (한국방송통신대학교 환경보건학과)
    韓國環境保健學會誌 = Journal of environmental health sciences v.38 no.2 ,pp. 83 - 94 , 2012 , 1738-4087 ,

    초록

    The research on microbial fuel cells (MFCs) needs various knowledge of different fields such as electrochemistry, microbiology, environmental engineering, and material engineering. Although electrochemically active bacteria are very diverse, the performance of MFCs is affected primarily by the structure of the reactor system. Thus, the development in the system architecture is critical to lower internal resistance and increase power generation for commercialization. This paper summarizes the principles of MFCs and demonstrates the infinite potential of MFCs in various applications including wastewater treatment, biosensors, biohydrogen production, remote power sources, implantable medical devices, etc.

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  2. [국내논문]   거주지와 산업단지간의 거리와 혈 중 납 농도 및 요 중 카드뮴 농도의 상관관계에 관한 연구   피인용횟수: 2

    허진아 (고려대학교 보건과학대학 환경보건학과 ) , 김효미 (고려대학교 보건과학대학 환경보건학과 ) , 이종태 (고려대학교 보건과학대학 환경보건학과)
    韓國環境保健學會誌 = Journal of environmental health sciences v.38 no.2 ,pp. 95 - 104 , 2012 , 1738-4087 ,

    초록

    Objectives: The goal of this study was to investigate the relationships between proximity to an industrial complex and blood lead levels and urinary cadmium levels. Methods: We conducted a questionnaire survey and analyzed blood lead and urinary cadmium levels using Atomic Absorption Spectrometry (AAs). Data was analyzed using logistic regression analysis. All statistical analyses were conducted with SAS software version 9.2. The distance between the residence and an industrial complex was calculated through a Geographical Information System (GIS). Results: A total of 967 residents living near a large petrochemical complex in Ulsan participated. The geometric mean levels of blood lead and urinary cadmium were $1.70{\mu}g/dl$ (male: $1.77{\mu}g/dl$ , female: $1.67{\mu}g/dl$ ), and $0.72{\mu}g/g$ creatinine (male: $0.49{\mu}g/g$ cr. female: $0.89{\mu}g/g$ cr.), respectively. Blood lead and urinary cadmium levels both increased with age and were higher among smokers compared to never smokers. Both significantly showed a decreasing trend with rising income. Results from multiple logistic regression analysis showed that urinary cadmium levels for subjects aged less than 20 years old were negatively associated with distance from the industrial area to the residence. The results, however, indicated that the blood lead levels were positively associated with the distance. Conclusions: The results of this study support that proximity to an industrial complex is related to urinary cadmium values for children. A positive finding with blood lead can be explained by the ambiguity of lead exposure sources in the general environment.

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  3. [국내논문]   한국인의 혈 중 PFOA와 PFOS 농도와 노출요인  

    서춘희 (인제대학교 의과대학 직업환경의학교실 & 환경.산업의학연구소 ) , 이채관 (인제대학교 의과대학 직업환경의학교실 & 환경.산업의학연구소 ) , 이소룡 (인제대학교 의과대학 직업환경의학교실 & 환경.산업의학연구소 ) , 박미희 (인제대학교 의과대학 직업환경의학교실 & 환경.산업의학연구소 ) , 이종태 (인제대학교 의과대학 직업환경의학교실 & 환경.산업의학연구소 ) , 손병철 (인제대학교 의과대학 직업환경의학교실 & 환경.산업의학연구소 ) , 김정호 (인제대학교 의과대학 직업환경의학교실 & 환경.산업의학연구소 ) , 김건형 (인제대학교 의과대학 직업환경의학교실 & 환경.산업의학연구소)
    韓國環境保健學會誌 = Journal of environmental health sciences v.38 no.2 ,pp. 105 - 117 , 2012 , 1738-4087 ,

    초록

    Objectives: This study aimed to assess the concentration of perfluorooctanoic acid (PFOA) and perfluorooctanesulfonate (PFOS) in blood and factors controlling their exposure among Koreans. Methods: Study subjects were selected to include 718 members of the general population residing in five metropolitan cities and the Gangwon Province area from August 2008 to January 2009. A questionnaire was administered to investigate lifestyle, socio-demographic characteristics, and other related factors. Blood samples were collected and extracted using solid-phase extraction and anion-exchange methods, and quantified by high-performance liquid chromatograph (HPLC, Agilent 1200 Series) coupled with a Triple Quad LC-MS/MS system (Agilent 6410). Results: Geometric mean concentrations of PFOA and PFOS in the blood were measured as 1.82 and 6.06 ng/ml, respectively. Mean PFOA and PFOS concentrations generally increased with age in both genders. Blood PFOA concentration was significantly different according to such variables as age, family income, residential district, and province. Blood PFOS concentration was significantly different by such variables as gender, age, lifestyle factors such as regular exercise, alcohol consumption, and smoking status. Also, family income, hazardous facilities, job classification, and province contributed significantly to differences in blood PFOS concentration levels. Conclusions: Blood PFOA and PFOS concentrations in Koreans were similar with those found in Japan, the USA, and Germany, but less than those in Australia. PFOA and PFOS exposure seems to be affected by a variety of factors in Korea. Therefore, investigation is required for each factor to assess the relative contribution of different variables.

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  4. [국내논문]   휴게음식점 주방의 환경위생상태에 관한 조사연구 - 계절별 변화를 중심으로 -   피인용횟수: 2

    김종규 (계명대학교 공중보건학과 ) , 박정영 (계명대학교 공중보건학과 ) , 김중순 (계명대학교 경영공학과)
    韓國環境保健學會誌 = Journal of environmental health sciences v.38 no.2 ,pp. 118 - 127 , 2012 , 1738-4087 ,

    초록

    Objectives: This study was undertaken to assess the sanitary conditions in the kitchens of food court/cafeterias and determine seasonal variations. Methods: We measured environmental factors (air temperature, relative humidity, illumination intensity, noise level), and dropping airborne microbes (bacteria and fungi) in the kitchens of eight food court/cafeterias in four seasons (January, April, July, and October). Air temperature and relative humidity were measured with in/out thermo-hygrometers at 1.2-1.5 m above floor level. Illuminance measurement was performed through the multiple point method of Korean Standards (KS). Noise level was measured by the standard methods for the examination of environmental pollution (noise and vibration) of Korea. The estimation of dropping airborne bacteria and fungi was performed through use of Koch's method. Results: The highest kitchen air temperature was in July, and the lowest in January. The average temperature surpassed $21^{\circ}C$ throughout the seasons, suggesting a higher temperature than required for the safe handling of food. Humidity in all the kitchens was measured in the range of 50-60%. Half of the kitchens showed illumination intensities below 300 Lux in April. It was found that the sound pressure level of noise in almost all of the kitchens was higher than 85 dB (A). The highest levels of dropping airborne bacteria and fungi were noted in July. The numbers of airborne bacteria were higher than those of fungi. The levels of dropping airborne bacteria and fungi were affected by air temperature, relative humidity, season, and place. Conclusions: This study indicates that the kitchen environments were unqualified to supply safe food. The hygiene level of the kitchens should be improved.

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  5. [국내논문]   유동흐름 전류계를 이용한 정수장 고탁도 유입수 응집 제어 방법에 대한 연구  

    남승우 (서울대학교 보건대학원 환경보건학과 ) , 조병일 (서울대학교 보건대학원 환경보건학과 ) , 김원경 (삼보과학 ) , 조경덕 (서울대학교 보건대학원 환경보건학과)
    韓國環境保健學會誌 = Journal of environmental health sciences v.38 no.2 ,pp. 128 - 135 , 2012 , 1738-4087 ,

    초록

    Objectives: This study was aimed at determining the optimum coagulation dosage in a high turbid kaolin water sample using streaming current detection (SCD) as an alternative to the jar test. Methods: SCD is able to optimize coagulant dosing by titration of negatively charged particles. Kaolin particles were used to mimic highly turbid water ranging from 50 to 600 NTU, and polyaluminum chloride (PAC, 17%) was applied as a titrant and coagulant. The coagulation consisted of rapid stirring (5 min at 140 rpm), reduced stirring (20 min at 70 rpm), and settling (60 min). To confirm the coagulation effect, a jar test was also compared with the SCD titration results. Results: SCD titration of kaolin water samples showed that the dose of PAC increased as the pH rose. However, supernatant turbidity less than 1 NTU after coagulation was not achieved for high turbid water by SCD titration. Instead, a conversion factor was used to calculate the optimum PAC dosage for high turbid water by correlating a jar test result with that from an SCD titration. Using this approach, we were able to successfully achieve less than 1 NTU in treated water. Conclusions: For high turbid water influent in a water treatment plant, particularly during summer, the application of SCD control by applying a conversion factor can be more useful than a jar test due to the rapid calculation of coagulation dosage. Also, the interpolation of converted PAC dose could successfully achieve turbidity in the treated water of less than 1 NTU. This result indicates that an SCD system can be effectively used in a water treatment plant even for high turbid water during the rainy season.

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  6. [국내논문]   채도측정시스템을 이용한 암모니아성 질소의 정량방법   피인용횟수: 1

    이형춘 (서원대학교 식품영양학과)
    韓國環境保健學會誌 = Journal of environmental health sciences v.38 no.2 ,pp. 136 - 141 , 2012 , 1738-4087 ,

    초록

    Objectives: The objective of this study was to investigate whether the ammonia nitrogen concentration of aqueous samples such as drinking water can be determined by measuring the saturation of the samples colored by indophenol method. Methods: A color saturation measurement system was constructed by connecting a notebook computer to an image acquisition device composed of a PC camera and a light source, and was then used to measure the saturation of samples colored by blue indophenol complex. Results: Between two available light sources, a fluorescent lamp was selected due to its demonstrating better linearity between color saturation and ammonia nitrogen concentration. Prediction by quadratic regression was more accurate than by linear regression, and prediction by quadratic regression in the concentration range of 0.1-1.0 $mg/l$ was more accurate than in the concentration range of 0.0-1.0 $mg/l$ . Regression-based predictions over 0.25 $mg/l$ , 0.55 $mg/l$ and 0.75 $mg/l$ concentrations were implemented both by spectrophotometric method and by measuring color saturation. In the case of 0.25 $mg/l$ , the predicted concentration by spectrophotometric method was $0.256{\pm}0.0076\;mg/l$ and the predicted concentration by measuring color saturation was $0.246{\pm}0.0086\;mg/l$ (p=0.051). In the case of 0.55 $mg/l$ , they were $0.561{\pm}0.0068\;mg/l$ and $0.564{\pm}0.0166\;mg/l$ (p=0.660). In the case of 0.75 $mg/l$ , they were $0.755{\pm}0.0139\;mg/l$ and $0.762{\pm}0.0088\;mg/l$ (p=0.215). Conclusions: There were no statistically significant differences (p>0.05) between the data from the two methods in all three of the concentrations. Therefore, the color saturation measurement method proposed in this paper may be considered applicable for determining the ammonia nitrogen concentration of aqueous samples such as drinking water.

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  7. [국내논문]   가축 분변중의 항생제 내성균주의 분포에 관한 연구   피인용횟수: 1

    권혁구 (호서대학교 융합기술연구소 ) , 이장훈 (호서대학교 환경공학과 ) , 김종규 (가천의과학대학교 보건행정학과)
    韓國環境保健學會誌 = Journal of environmental health sciences v.38 no.2 ,pp. 142 - 150 , 2012 , 1738-4087 ,

    초록

    Objectives: To estimate the multi-antibiotic resistant bacterial contaminant load discharged from livestock farms, we randomly selected livestock farms specializing in cattle, swine, and fowl and collected bacterial strains from domesticated animal feces and compost samples. Problems with resistance to antibiotics are becoming worldwide issues, and as the consumption of antibiotics appears to be excessive in Korea as well, the emergence of antibiotic resistant bacteria shows the possibility to cause potentially serious social problems. Methods: To monitor multi-antibiotic resistant bacterial constituents, aerobic bacteria and Escherichia coli were isolated from domesticated animal feces and compost. Antibiotic resistance testing was performed by the disc diffusion method using 13 different antibiotics. Results: Examining the degree of sensitivity to antibiotics of the aerobic bacteria originating from domesticated animal feces, fowl feces showed the highest distribution rate (35.5%), followed by swine feces compost (23.1%), swine feces (18.2%), cattle feces (14.9%), and cattle feces compost (8.2%). Antibiotic resistance tests of aerobic bacteria and E. coli originating from domestic animals feces resulted in 83.6% and 73.5% of each strain showing resistance to more than one antibiotic, respectively. Conclusions: These results suggest that increasing multi-antibiotic resistant bacteria in the environment has a close relation to the reckless use of antibiotics in livestock.

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  8. [국내논문]   유기성 폐기물 자원화 시설에서 발생되는 부유 세균의 분포 특성  

    김기연 (부산가톨릭대학교 산업보건학과 ) , 고한종 (제주도청 축산정책과 ) , 김대근 (서울과학기술대학교 환경공학과)
    韓國環境保健學會誌 = Journal of environmental health sciences v.38 no.2 ,pp. 151 - 158 , 2012 , 1738-4087 ,

    초록

    Objectives: Bioaerosols released by treating organic-waste resources cause a variety of environmental and hygiene problems. The objective of this study was to investigate the distribution characteristics of the airborne bacteria emitted from a pig manure composting plant, a principal site for organic-waste resource facilities. Methods: Three types of pig manure composting plant were selected based on fermentation mode: screw type, rotary type and natural-dry type. Each site was visited and investigated on a monthly basis between September 2009 and August 2010. A total of 36 air samplings were obtained from the pig manure composting plants. The air sampling equipment was a six-stage cascade impactor. Quantification and qualification of airborne bacteria in the air samples was performed by agar culture method and identification technique, respectively. Results: The mean concentrations of airborne bacteria in pig manure composting plant were 7,032 ( ${\pm}1,496$ ) CFU $m^{-3}$ for screw type, 3,309 ( ${\pm}1,320$ ) CFU $m^{-3}$ for rotary type, and 5,580 ( ${\pm}1,106$ ) CFU $m^{-3}$ for natural dry type. The screw type pig manure composting plant showed the highest concentration of airborne bacteria, followed by the natural dry type and the rotary type. The ratio of respirable to total airborne bacteria was approximately 40-60%. The predominant genera of airborne bacteria identified were Micrococcus spp., Staphylococcus spp. and Escherichia spp. Conclusion: Monthly levels of airborne bacteria were highest in August and lowest in November regardless of fermentation mode. There was no significant correlation relationship between airborne bacteria and environmental factors such as temperature, relative humidity and particulate matters in pig manure composting plants.

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  9. [국내논문]   유전체 장벽 방전 플라즈마 방전수의 특성과 미생물 소독에 관한 연구   피인용횟수: 2

    김동석 (대구가톨릭대학교 환경과학과 ) , 박영식 (대구대학교 기초교육원)
    韓國環境保健學會誌 = Journal of environmental health sciences v.38 no.2 ,pp. 159 - 165 , 2012 , 1738-4087 ,

    초록

    Objectives: This experiment was carried out to elucidate the effect of discharged water on the disinfection of $Phytophthora$ $capsici$ and evaluate the water characteristics. Methods: The dielectric barrier discharges (DBD) plasma reactor system used in this study consisted of a plasma component [discharge, ground electrode and quartz dielectric tube], high voltage source, and air supply. The effects of water characteristics such as pH, ORP and conductivity and the disinfection effect of discharged water were investigated. Results: Experimental results showed that in the process of discharge, the pH decreased, whereas ORP and electric conductivity increased. When the discharge time was 30 min, $Phytophthora$ $capsici$ of 2.94 log was disinfected within 300 seconds. Disinfection performance of stored discharged water was maintained for three days; however the disinfection effect vanished after five days. When $Phytophthora$ $capsici$ was injected into the discharged water, the disinfection effect decreased after two days. Conclusions: It is considered that the main disinfection parameters of the discharged water were chemically active species such as $H_2O_2$ and $O_3$ and high ORP.

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  10. [국내논문]   가습기살균제 피해사건과 교훈   피인용횟수: 3

    최예용 (환경보건시민센터 ) , 임흥규 (환경보건시민센터 ) , 임신예 (환경보건시민센터 ) , 백도명 (환경보건시민센터)
    韓國環境保健學會誌 = Journal of environmental health sciences v.38 no.2 ,pp. 166 - 174 , 2012 , 1738-4087 ,

    초록

    Introduction: After 17 years since the first production of humidifier disinfectants in Korea, Korea Centers for Disease Control and Prevention (KCDC) announced that the odds ratio of lung injury related with humidifier disinfectant usage was 47.3 (95% confidence interval 6.0-369.7) according to a case-control study with 18 adult cases, including 8 pregnant women at a university hospital in Seoul. Results: From September 2011 to April 2012, one-hundred and seventy four victim cases have been reported to an environmental non-governmental group (NGO). We summarized timetable of humidifier disinfectants accidents, analyzed health outcomes (death, lung or lung and heart transplantation, pulmonary disease) of reported victims, and classified some information for humidifier disinfectants with health outcomes, and government action for this accident. Among the victims, number of death cases are 52 (30.0%), including 26 babies less than 3 years old. Sixty-nine victims come from twenty-seven family with 2 to 4 members per family. About twenty types of humidifier disinfectant products and about 600,000 product items a year have been sold. Fifty-two death cases used 7 different types of disinfectant products, including imported goods and some private brands of well-known supermarkets. KCDC confirmed inhalation toxicity of 6 products through an animal experimental test, and based on this observation recalled disinfectants containing PHMG (polyhexamethylene guanidine) and PGH (Oligo(2-(2-ethoxy)ethoxyethyl guanidinium chloride). Discussions: The use of these biocides involved highly fatal consequences among biologically vulnerable victims, such as pregnant women, several family member victims after semi-acute exposure. This is the first biocide disaster in Korea with non-specific targets, and unknown scale of victims, warranting concerns on use of biocides in the living environment. Conclusions: Special administrative agency for chemical safety and compensation act for environmental health victims are needed to prevent similar problems.

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