석탄회 재활용 및 콘크리트 화학혼화제 기술을 선도하는 기업

정권수(Kweon-Soo Jung) 한국콘크리트학회 2007 콘크리트학회지 Vol.19 No.4

어린이용 화장품에 사용되는 보존제 및 함유량 조사

정삼주 ( Sam Ju Jung ),황영숙 ( Young Sook Hwang ),최채만 ( Chae Man Choi ),박애숙 ( Ae Suk Park ),김수언 ( Su Un Kim ),김현정 ( Hyun Jung Kim ),김정헌 ( Jung Hun Kim ),정권 ( Kweon Jung ) 대한화장품학회 2015 대한화장품학회지 Vol.41 No.3

본 연구에서는 시중에서 유통 중인 어린이용 화장품 총 125건(n = 125)을 대상으로 하여 파라벤 6종과 벤질알콜, 페녹시에탄올, 소르빈산, 벤조산 등 10종의 보존제에 대한 혼합 사용실태와 함량을 HPLC를 이용하여 조사하였다. 유형별 보존제 검출률은 세정제 63%, 크림류 48%, 자외선차단제 46%, 로션류 38%, 오일이 13%의 순으로 검출되어 총 125건 중 63건(50%)의 제품에서 1종류 이상의 보존제를 사용하고 있는 것으로 조사되었다. 보존제별 검출범위는 페녹시에탄올 0.01 ~ 0.91% (n = 35), 벤조산 0.01 ~ 0.48% (n = 28), 벤질알콜 0.01 ~ 0.78% (n = 9), 소르빈산 0.01 ~ 0.11% (n = 3)였으며, 파라벤류 중 메틸 파라벤과 프로필 파라벤은 0.04 ~ 0.21% (n = 8)와 0.02 ~ 0.09% (n = 8)의 검출범위를 보였고, 에틸 파라벤은 1개 제품에서 0.04%로 모두 배합한도 이내로 검출되었다. 조사결과 어린이용 화장품에서는 파라벤류 보다 페녹시에탄올과 벤조산의 사용빈도가 높았으며 검출된 파라벤류 중에서는 메틸 파라벤과 프로필 파라벤이 주로 혼합 사용되는 것으로 나타났다. This study was conducted to determine 10 preservatives (benzyl alcohol (BAl), phenoxyethanol (PE), benzoic acid (BA), sorbic acid (SA), methyl paraben (MP), ethyl paraben (EP), propyl paraben (PP), isopropyl paraben (IPP), butyl paraben (BP), isobutyl paraben (IBP)) levels in 125 cosmetics (n = 125) for children by the simultaneous analysis of HPLC. The detection ranges were as follows; 0.01 ~ 0.91% (n = 35) for PE, 0.01 ~ 0.48% (n = 28) for BA, 0.01 ~ 0.78% (n = 9) for BAl, 0.01 ~ 0.11% (n = 3) for SA, 0.04 ~ 0.21% (n = 8) for MP, 0.02 ~ 0.09% (n = 8) for PP, and 0.04% (n = 1) for EP. The order of detection rates was cleanser (63%) > cream (48%) > sunscreen (46%) > lotion (38%) > oil (13%). At least one of target preservatives was contained in 50% (63/125) of samples and the content of the detected preservatives was within maximum allowed amount established by KFDA. Phenoxyethanol and benzoic acid were used more frequently than paraoxybenzoate esters (parabens) in cosmetics for children and the detected parabens was mainly the mixture of methyl paraben and propyl paraben.

서울시내 어린이 놀이터 토양오염도 평가

이준복,김교붕,정권,김민영,Lee, Jun-Bok,Kim, Gyeo-Bung,Jung, Kweon,Kim, Min-Young 한국환경보건학회 2006 한국환경보건학회지 Vol.32 No.4

This survey study was performed to evaluate the pollution level of playgrounds for children at 49 different sampling sites in Seoul metropolitan. Results were as follows. 1. Soil pH ranged from 6.0 to 9.2. 2. Average concentrations of heavy metals were 0.101 mg/kg of Cd, 4.470 mg/kg of Cu, 0.10 mg/kg of As, 5.35 mg/kg of Pb, 0.017 mg/kg of $Cr^{6+}$ 0.0051 mg/kg of Hg, which were lower than Korean soil precaution level. 3. The SPCs of all areas were below 100, which is 1st grade. In conclusion, the pollution level of playgrounds for children was safe.

Hood Method를 이용한 직화구이 음식점의 미세먼지 배출 특성

이준복,김흥주,정권,김신도,Lee, Jun-Bok,Kim, Heung-Joo,Jung, Kweon,Kim, Shin-Do 한국환경보건학회 2009 한국환경보건학회지 Vol.35 No.4

Under-fired charbroiling cooking processes are known as important contributors of particulate matter (PM). In this study, we characterized the emission of particulate matters from under-fired charbroiling cooking processes using the hood method. Accumulated mass concentration of $PM_{10}$ was 92.2~99.5% and particle size of 2.0~2.5 ${\mu}m$ was highest. The concentration of PM increased very sharply at the beginning of charbroiling meats and then gradually decreased as the charbroiling continued. PM concentration also increased very sharply when gravy from meat spilled onto the frame of fire. However, mass concentration during charbroiling using only charcoals was very low compared to that of meats. We estimated the emission factors of charcoal, pork belly and pork shoulder respectively; 0.01~0.02 g/kg, 5.02~6.26 g/kg, 2.86~4.15 g/kg of $PM_{2.5}$, 0.01~0.03 g/kg, 7.44~7.91 g/kg, 4.54~5.56 g/kg of $PM_{10}$, and 0.02~0.05 g/kg, 7.59~7.95 g/kg, 4.93~5.68 g/kg of TSP. The emission factors of charcoal were negligible and the emission factors of pork belly were higher than that of pork shoulder. Emission rates of particulate matters from under-fired charbroiling cooking process were estimated as 578,009~1,265,152 kg/yr of $PM_{2.5}$, 917,539~1,598,619 kg/yr of $PM_{10}$ and 996.358~1,606,703 kg/yr of TSP. But emission factors should be verified with an in-stack cascade impactor because the reported method involves some assumptions.

토양미생물제제에 의한 음식폐기물의 퇴비화 검토

배일상(Il-sang Bae),정권(Kweon Jung),전은미,김광진,이동훈(Dong-Hoon Lee) 유기성자원학회 2000 유기물자원화 Vol.8 No.4

음식물 퇴비화를 위한 토양미생물제 재의 퇴비화 효율을 평가하며 토양미생물제재의 미생물수와 퇴비화과정에서 식종의 효과를 조사하였다. 분석대상 음식물은 본 연구원 구내식당에서 수거한 후 물리화학적특성을 분석하였다. 대상시료는 Bulking Agent로서 톱밥을 사용하여 함수율을 65%로 조정 후 반응기 B에 10%의 토양미생물제를 식종하였다 토양미생물제제의 미생물은 호기성세균수가 2.98 x 1Q9!g이상, 방선균이 3.93 x lQ'!g이상, 효모가 1. 21X 1Q5jg, 균류가 5,79 x lQ' jg 이상이었다. 퇴비화 기간동안 최고온도는 Reactor A가 반응 10 일후에 응 개시후 바로 급격한 변화를 보였으며, 반응이 종료된 후 두 Reactor 공히 pH8.9를 나타내었다. Reactor B의 경우 최대옹도인 4 일후에 C02농도도 역시 최대인 10.8%를 나타냈으며, Reactor A 는 최대온도인 10 일후에 6.1%를 나타내었다. 한편 Reactor A는 rd(유기물질의 분해율)치가 0.35 에서 0.41로 17.1%상승하였으며, Reactor B의 경우 0.31에서 0.51로 64.5%상승하였다. This study was performed to evaluaκ efficiency of soil microbial inoculator for active composting of food waste. In addition, rhe number of microorganisms in soil microbial inocularor and the effect of seeding in the procεss of composting were invesrigared. Food wasre samples collected from a refecrory were analyzed for physical-chemical properties, The samples were adjusted to moisture content of 65% by saw dust and seeded with soil microbial inoculator of 10% by the weight in case of reactor B. The number of microorganisms, aerobic bacteria, actinomyces, yeasr, and fungi in soil microbial inoculator were over 2,98 x109/g, 3.93 x107/g, 1.21 x105/g, and 5.79 x 1Q7/g, respevely. During the process of composting, 야le highest temperatur were 63.40C at reactor A(unseeded control) after 10 days and 66.80C at reacror B(seeded compost) after 4 days. The pH values of reactor A and B rapidly increased after 3 days and after fìrst few days during composting period, respectively. The highest CO, concemrations were 6.1 % (after 10 days) and 10.8%(after 4 days) in reactor A and B, respeively. The degradation rates of organic matter(rd) between reactor A and B increased by 17.1 % and 64.5%, respectively. Consεquently, the effects of inoculation on compostÏng paneter such as temperature increasing, pH change, chemical properties, and the degradation rates of organic matter(rd) were higher in seeded compost than in unseeded control.

서울시 고농도 PMnullnull과 PM2.5 발생시 levoglucosan과의 상관관계

서영화(Young-Hwa Seo),정권(Jung Kweon) 한국환경관리학회 2013 環境管理學會誌 Vol.19 No.1

Levoglucosan은 농업 잔재물 소각이나 산불과 같은 바이오매스 연소 특성을 강하게 나타내는 유기화합물이다. 서울 광진구와 구로구의 미세먼지 농도가 높은 날 채취된 PM10과 PM2.5 에서 levoglucosan을 분석하여 그 인과관계를 알아보았다. 동시에 유기 탄소성 물질(OC)과 원소 탄소성물질(EC)도 측정하였다. 미세먼지 채취 기간 중인 1월에 PM10 농도가 120.5 ㎍/㎥, 그리고 PM2.5 농도가 79.2 ㎍/㎥ 까지 높게 관측되었는데 OC 농도도 PM10의 17.5%~44.5%, PM2.5의 25.7~64.6% 까지 동시에 높게 나타나서 OC의 증가가 미세먼지 농도증가에 큰 영향을 미치는 것으로 나타났다. OC/EC 비율도 PM10의 경우 5.13, PM2.5의 경우 5.54로 상당히 높아서 매우 많은 양의 OC가 유입된 것을 확인하였다. PM10농도가 평상인 날의 PM10 levoglucosan의 농도는 24 ~ 65 ng/㎥ 이었으며, PM10 농도가 높은 날 PM10 levoglucosan의 농도는 225~146 ng/㎥으로 평균 5배 이상 높았다. 그러므로 PM10 농도가 높은 원인은 levoglucosan 농도의 증가 결과로서 바이오매스 연소로 인한 스모그의 유입이 큰 원인인 것으로 확인할 수 있었다. PM2.5 농도가 평상인 날의 PM2.5 levoglucosan의 농도는 19.3 ~ 35.4ng/㎥ 이었는데 PM2.5 농도가 높은 날의 PM2.5 levoglucosan의 농도는 114 ~ 146 ng/㎥으로 4~ 5배 이상 높게 관측되어 PM2.5 농도가 높은 원인도 바이오매스 연소로 인한 스모그의 유입이 큰 원인인 것으로 확인할 수 있었다. 측정 결과로부터 levoglucosan의 농도는 미세먼지 농도가 급속하게 오르기 전 하루 전부터 높아지는 것으로 확인되었는데 바이오매스 연소 스모그가 유입되면서 미세먼지의 농도는 추후로 높아지는 것으로 예측할 수 있다. This study was carried out to figure out the relationship of levoglucosan and the high concentration of fine particulate. Levoglucosan is an organic compound found in air particulates, presenting a strong biomass burning characteristics such as combustion of agricultural residues and forest fires. It was measured from fine particulates sampled at the dates when the high concentration of PM10 and PM2.5 outbreaks occurred in January and February, 2012. When PM10 concentration was raised to 120.5 ㎍/㎥, and PM2.5 concentration was to 79.2 ㎍/㎥, OC concentration were also raised upto 44.5% of the PM10 and 64.6% of the PM2.5, indicated that increase of OC impacted on the increase of the concentration PM10 and PM2.5 High ratio of OC/EC also indicated that a large amount of OC was introduced. Levoglucosan concentrations of PM10 at the dates with high PM10 concentration were 225~146 ng/㎥ which were 5 times higher than those of the normal PM10 concentration. Levoglucosan concentrations of PM2.5 at the dates with high PM2.5 concentration were 114 ~ 146 ng/㎥ which were 4~5 times higher than those of the normal PM2.5 concentration. These results clearly showed that the cause of the high PM10 concentrations could be a levoglucosan concentration increased as a result of the influx of smog caused by the burning of biomass. And the measurement results were also confirmed that the concentration of levoglucosan was increased from the day before when the fine particulate concentration is rapidly increased. It can be predicted that the biomass burning smog influxes earlier and the higher concentration of fine dust occurs later.

배수관망에서 수처리에 의한 AOC, BDOC및 세균성장의 특성

장용철(YoungCheol Chang),정권(Kweon Jung),유영식(Yoo YoungSik),강미혜,(Kang MiHye),Andrew A. Randall 한국환경보건학회 2002 한국환경보건학회지 Vol.28 No.5

배수관망에서의 박테리아 재 증식은 큰 현안문제로 대두되고 있으며 이를 억제하기 위한 염소소독 또한 발암 성의 푸산물인 THMs(trihulomethanes) 동을 생성시킬 우려 때문에 미국에서는 오존살균처리 또는 나노여과 (nunoliltration) 법으로 대체해 오고 있다 . 그러나 종래의 많은 bench scale 실험결과를 통해 이러한 처리 이후 에 잔존하는 미량의 유기물 (assimilable organic carbon) 이 박테리아 재 증식에 계속하여 영향을 주고 있다는 결 과가AOC(ussimilable organic carbon) 와 박테리아 재 증식의 상관관계를 통하여 밝혀지고 있다 . 그러나 현재 까지 이러한 연구결과를 full-scule 규모의 현장시설에서 직접 검토한 예는 없다 . 따라서 본 실험은 미국플로리 디추에 위치한 두 지역의 full-scale 배수관망 시설을 선정하여 실시하였다 . 첫 번째 시설은 오존 살균처리를 그 리고 다른 한곳은 나노여과와 석회연수법 (lime softening) 을 병행한 처리법을 사용하고 있다 . 박테리아 증식은 R2A 배지를 사용하는 HPC(heterotrophic plate counts) 법으로 평가했으며 오존이 공급된 배수관망에서의 HPC 는 각 셈플링 지접의 AOC 값을 이용한 지수모델과 높은 상관관계가 있음이 판명되었다 (R2=O.97). 또한 오존처 리는 100% 이상의 AOC 농도증가를 나타냈다 나노여과법과 석회연수법을 병행하고 었는 시설에서도 AOC 에 근거한 지수모델과 상관관계를 나타냈다 (R_=O.75) 그러나 BDOC( biodegradable dissolved organic)는 박테리아 증식에 있어 매우 낮은 상관관계 값을 표시했다 (R²-=0.11) 결과적으로 종래의 많은 bench scalc 실험결과와 같이 AOC 는 배수관망에서의 박테리아 증식과 크게 상관관계를 갖고 있는 갓으로 밝혀졌다. Two full-scale distribution systems. one treating water by ozonation and another treating water by nanofiltration in pamllel with lime softening. were monitored for bacterial growth. Both systems kept disinfectant residuals such as chlorine and chloramine in their respective distribution systems. Bacterial growth was assessed by heterotrophic plate counts (HPC) on R2A agar. In the distribution systems fed by ozonated water, HPCs were correlated (R2 = 0.97) using an exponential model with the assimilable organic carbon (AOC) at each sampling site. Also. it was observed that ozonation caused a signilicant increase in the AOC concentration of the distribution system (over 100% increuse) as well as a signilicant increuse in the bacterial counts of the distribution system (avemge increase over 100%). The HPCs from the distribution systems fed by nanofiltmtion in purallel with lime-softening water also displayed un exponential correlation (R2 = 0.75) with an exponential model based on AOC. No signilicunt correlation was found between bacteria growth on R2A agar and BOOC concentrations. Therefore, in agreement with previous work, bacterial growth in the distribution systems was found to correlate with AOC concentmtions.

서울시 터널의 유해대기오염물질 농도변화 특성 분석

박진아,이원영,김진아,김익수,김현수,정종흡,윤중섭,정권,엄석원,Park, Jin-A,Lee, Won-Young,Kim, Jin-A,Kim, Ik-Su,Kim, Hyun-Su,Jeong, Jong-Heup,Yun, Jung-Seop,Jung, Kweon,Eom, Seog-Won 한국환경보건학회 2013 한국환경보건학회지 Vol.39 No.6

Objectives: We analyzed the characteristics of hazardous air pollutants (HAPs) in road tunnels in Seoul. Methods: Particle matter ($PM_{10}$), elemental carbon (EC), organic carbon (OC), and 16 species of polycyclic aromatic hydrocarbons (PAHs) in two road tunnels (NS tunnel and HJ tunnel) were sampled and analyzed from 2007 to 2011. Results: Levels of $PM_{10}$ and carbon ingredients which were mainly emitted from diesel-fueled vehicles showed a declining tendency in both road tunnels. PAHs levels in HJ were declining slightly while PAHs levels in the NS tunnel fluctuated considerably and showed an increasing tendency. Conclusions: These results suggested that the abatement project of diesel vehicle emissions by the Seoul metropolitan government from 2007 has had an impact on the reduction of DVE into the air, though there exist many things to consider for analyses.

한약재의 약용부위에 따른 회분, 산불용성회분 및 중금속 함량

김동규(Dong-gyu Kim),김경식(Kyung-sik Kim),이성득(Sung-deuk Lee),정권(Kweon Jung),박승국(Seung-kook Park) 한국분석과학회 2014 분석과학 Vol.27 No.2

식품가공처리가 농산물 잔류농약에 미치는 영향에 대한 메타분석

김남훈(Nam Hoon Kim),박경애(Kyung Ai Park),정소영(So Young Jung),조성애(Sung Ae Jo),김윤희(Yun Hee Kim),박혜원(Hae Won Park),이정미(Jeong Mi Lee),이상미(Sang Mi Lee),유인실(In Sil Yu),정권(Kweon Jung) 한국농약과학회 2016 농약과학회지 Vol.20 No.1