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석류 및 오배자 추출물과 시판 섬유 소취/항균제를 처리한 면, 견, 모직물의 소취/항균성의 비교
이영희,이슬기,황은경,백영미,조순자,김정수,김한도,Lee, Young-Hee,Lee, Seul-Gi,Hwang, Eun-Kyung,Baek, Young-Mee,Cho, Sunja,Kim, Jung-Soo,Kim, Han-Do 한국섬유공학회 2016 한국섬유공학회지 Vol.53 No.1
We compared the ability of pomegranate and gallnut extracts to protect fabrics against odors and bacteria with the deodorizing and antibacterial efficacy of two commercial deodorizing and antibacterial agents. Cotton, silk, or wool fabric was treated with pomegranate extract, gallnut extract, or one of two commercial deodorizing and antibacterial agents, F or D. The fabrics were tested for their ability to withstand the odor of ammonia, trimethylamine, acetaldehyde, or acetic acid, and their antibacterial activity against Klebsiella pneumonia and Staphylococcus aureus. We analyzed the volatile components in pomegranate extract, gallnut extract, F, and D using gas chromatography-mass spectrometry. We found more acidic volatile components in the pomegranate and gallnut extracts than in F and D. In contrast, there were more cyclo compounds in the volatile materials of F and D than in the pomegranate or gallnut extracts. The fabrics treated with pomegranate or gallnut extract showed a greater ability to withstand odors than those treated with F or D. However, the fabrics treated with F showed a greater ability to withstand acetic acid odors than did the fabric treated with pomegranate extract, gallnut extract, or D. The antibacterial properties of fabric treated with pomegranate extract, gallnut extract, and F was found to be excellent (bacteriostatic reduction rate=99.9%). These results suggest that pomegranate and gallnut extracts have strong potential to be used as multi-functional agents, with both showing excellent deodorizing and antibacterial properties.
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부산시내 석면슬레이트지붕 건축물로부터의 석면 노출 및 건강위해성 평가
정재원 ( Jae Won Jeong ),조순자 ( Sunja Cho ),박근태 ( Geun Tae Park ),이상준 ( Sang Joon Lee ) 한국환경과학회 2013 한국환경과학회지 Vol.22 No.12
This study was performed to evaluate the asbestos exposure levels and to calculate excess lifetime cancer risk (ELCR) for the risk assessment of the asbestos fibers released from asbestos-cement slate roofing (ASR) building. Total number of ASR buildings was into 21,267 in Busan, and 82.03 percent of the buildings was residential houses, and 43.61 percent of the buildings was constructed in 1970s. For this study, ten buildings were selected randomly among the ASR buildings. The range of airborne asbestos concentration in the selected ten ASR buildings was from 0.0016 to 0.0067 f/mL, and the concentration around no-admitted ASR buildings was higher than that around admitted buildings. The ELCR based on US EPA IRIS (integrated risk information system) model is within 3.5E-05 ~ 1.5E-04 levels, and the ELCR of no-admitted ASR buildings was higher than 1.0E-04 (one person per million) level that is considered a more aggressive approach to mitigate risk. These results indicate that the cancer risk from ASR buildings is higher than other buildings, and systematic public management is required for control of no-admitted ASR buildings within near future.
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CANON 공정에서 운전조건에 따른 질소 제거효율 및 미생물군집 변화
조경민(Kyungmin Jo),박영현(Younghyun Park),조순자(Sunja Cho),이태호(Taeho Lee) 大韓環境工學會 2015 대한환경공학회지 Vol.37 No.6
질소화합물은 부영양화 등 수질을 악화시키는 결과를 초래하므로 질소 제거는 수처리에 있어 가장 중요한 문제들 중하나이다. 본 연구에서는 독립영양탈질 공정인 CANON (Completely Autotrophic Nitrogen-removal Over Nitrite)을 이용하여 암모니아성 질소 제거 효율을 평가하고, 미생물 군집 분석을 수행하였다. AOB (Ammonium Oxidizing Bacteria)와 ANAMMOX (ANaerobic AMMonium OXidation)균을 동시에 식종하고, 37℃에서 유입 암모니아성 질소농도 100 mg-N/L와 아질산성 질소농도 100 mg-N/L 조건으로 운전한 결과, 성공적인 CANON 반응이 유도되었다. 유입수에서 아질산성 질소를 제외시키고 암모니아성 질소(100 mg-N/L)만을 공급하였을 때, DO농도 0.4 mg/L 이상에서는 CANON의 성능이 악화되었지만, DO농도를 0.3 mg/L으로 낮추자 71.3%의 총 질소제거효율을 나타내었다. 유입 암모니아성 질소 농도를 50 mg-N/L로 낮추었을 때, 질소제거효율이 급격히 악화되었다. 그러나 유입농도를 다시 100 mg-N/L로 증가시키자 14일 만에 이전의 질소제거성능을 회복하였고, 이후 76.1±4.9%의 총 질소제거효율을 나타냈다. 온도를 상온(20±1℃) 조건으로 전환하자 초기에는 불안정한 CANON반응이 일어났지만, 23일 이후에는 안정적인 총 질소제거효율(70.0±2.6%)을 유지하였다. PCR-DGGE를 이용한 미생물군집 분석 결과, 식종원과 CANON의 미생물군집은 확연한 차이를 나타냈지만, CANON의 각 조건에 따른 미생물군집은 크게 다르지 않았다. 따라서 질소제거 성능의 악화는 미생물군집을 구성하는 미생물종의 변화에 기인하기 보다는 구성 미생물종들의 질소제거 활성의 저하에 기인하는 것으로 생각된다. 이러한 결과는 AOB와 ANAMMOX균을 식종하여 CANON 반응을 성공적으로 유도한다면, 이후 농도나 온도의 변화에도 안정적인 미생물군집을 유지할 수 있다는 것을 의미한다. Nitrogen removal is one of the most important issues about wastewater treatment because nitrogen is a primary pollutant caused various problems such as eutrophication. We developed a CANON microbial community by using AOB and ANAMMOX bacteria as seeding sources. When 100 mg-N/L of influent ammonium was supplied, the DO above 0.4 mg/L showed a very low TN removal efficiency while the DO of 0.3 mg/L showed TN removal efficiency as high as 71.3%. When the influent ammonium concentration was reduced to 50 mg/L, TN removal efficiency drastically deceased. However, TN removal efficiency was recovered to above 70% after 14 day operation when the influent nitrogen concentration was changed again from 50 mg-N/L to 100 mg-N/L. According to the operating temperature from 37±1℃ to 20±1℃, TN removal efficiency also rapidly decreased but gradually increased again up to 70.0±2.6%. The analysis of PCR-DGGE showed no substantial difference in microbial community structures under different operational conditions. This suggests that if CANON sludge is once successfully developed from a mixture of AOB and ANAMMOX bacteria, the microbial community can be stably maintained regardless of the changes in operational conditions.
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