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Lifecycle cost assessment of best management practices for diffuse pollution control in Han River Basin
Soyoung Lee, Marla C. Maniquiz-Redillas, Jeong Yong Lee, Hyunsaing Mun, Lee-Hyung Kim 한국습지학회 한국습지학회지 8 Pages
한국습지학회 한국습지학회지 2016, Vol.18 No.4 13 448-455 (8 pages)
primarily for public acceptance of BMPs such as ponds, while functional maintenance is important for performance and safety reasons. In this study, most of the maintenance activities were focused in the aesthetic maintenance such as cleaning and removal of debris, litters and accumulated solid in the inflow channel and cover with a frequency of 20 times/year. The rearrangement of the soil... of the maintenance activity was focused in the aesthetic maintenance that resulted to the annual maintenance cost of the four BMP types was closely similar ranging from 8,483 $/yr for retention pond to 8,888 $/yr infiltration system. The highest LCC were observed in constructed wetland ($418,324) while vegetated system had the lowest LCC ($210,418). LCC of BMPs was not so high as compared with the conventional treatment facility and sewage treatment plant. On the other hand, the relationship of... -
Microglial involvement in the development of olfactory dysfunction
Yoojin Seo, Hyung-Sik Kim, Kyung-Sun Kang 대한수의학회 Journal of Veterinary Science 12 Pages
대한수의학회 Journal of Veterinary Science 2018, 제 19권 제 3호 1 319-330 (12 pages)
long-term exposure of air-borne agents (e.g., smoking, air pollutant), and blood flow reduction in the nasal mucosa can cause direct damage to olfactory neurons [40,88]. Autopsy and brain imaging have revealed gradual atrophy of the OB accompanied by the loss of olfactory nerve fibers with aging [17,25]. Similarly, functional MRI and electroencephalography recordings have demonstrated a... Olfactory impairment is the most common clinical manifestation among the elderly, and its prevalence increases sharply with age. Notably, growing evidence has shown that olfactory dysfunction is the first sign of neurodegeneration, indicating the importance of olfactory assessment an early marker in the diagnosis of neurological disorders. In this review, we describe the nature of olfactory dysfunction and the advantage of using animal models in olfaction study, and we include a brief... -
Impact of single metal oxide and coal ash on secondary ultrafine particle generation through SO2 and NO2 heterogeneous reaction
Ru-Jiao Song, Zi-Xiang Xu, Joo-Chang Park, Li-Hua Xu, Hyung-Taek Kim 한국열환경공학회 열환경공학 19 Pages
한국열환경공학회 열환경공학 2020, 제 15권 1호 4 28-46 (19 pages)
Therefore, paying attention to the NH3 emission problem and exploring the effect of ammonia on the secondary inorganic particulates in the atmosphere is of great significance in helping humans control particulate matter. At present, most investigations on the heterogeneous reaction of gaseous pollutant on the surface of particulate matter focus on single component particulate matter, and... Particulate matter research is of great significance in solving atmospheric environment problems. The heterogeneous reaction of mixed gas on different mineral oxides and coal ash was studied based on a laboratory-built aerosol generating reactor. The product formed on particles was investigated by ion chromatography (IC). SO2 and NO2 could react on oxides to form secondary particles and the order of reactivity of mineral oxides under laboratory reaction conditions is: Al2O3>MgO>CaO>>SiO2, Fe2O3.... -
Three-dimensional porous graphene materials for environmental applications
Muruganantham Rethinasabapathy, Sung-Min Kang, Sung-Chan Jang, Yun Suk Huh 한국탄소학회 Carbon Letters 13 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 1 1-13 (13 pages)
recollecting the materials for subsequent use. Few studies have yet focused on this area. To overcome the separation problem, it is imperative to develop mag- netically recoverable graphene-based green inexpensive materials. In conclusion, because of their unique structure, porous graphene materials continue to be the focus of ongoing re- search and development, and further exciting results... control their pore structures at the atomic, molecular, and nanometer scales enable interactions with atoms, ions and molecules to occur throughout the bulk of the material, for practical applications. Three-dimensional (3D) porous carbon-based materials (e.g., graphene aerogels/hydrogels, sponges and foams) made of graphene or graphene oxide-based networks have attracted considerable attention because they offer low density, high porosity, large surface area, excellent electrical conductivity... -
동절기 마을하수처리장 영양염류 제거에 관한 연구
임지열, 길경익 한국습지학회 한국습지학회지 8 Pages
한국습지학회 한국습지학회지 2014, Vol.16 No.3 8 363-370 (8 pages)
것을 의미한다. 핵심용어 : 마을하수도 질소 인 영양염류 생물학적 영양소 제거 , , , , Abstract Sewage distribution rate in rural area is only 50% level than urban area. Normally, rural area sewage is focused on the reason of water source pollution owing to rural areas were located in near water source. The Korea government is effort to manage the rural community sewage for protect the water source.... 농촌 지역 마을하수도 보급률은 도시 지역에 비해 38% 정도 수준밖에 되지 않는다. 농촌 지역은 상수원 인근에 위치하여 농촌지역에서 발생하는 하수는 상수원 오염의 원인으로 알려져 있다. 그래서 정부에서는 마을하수도 관리에 많은 노력을 기울이고 있다. 본 연구에서는 동절기 마을하수도 영양염류 제거 효율을 분석하였으며, 안동·임하댐 인근에 위치한 봉화, 영양 그리고 안동의 신설된 마을하수도를 연구 대상으로 선정하였다. 동절기 마을하수도 영양염류 제거 효율은 체류 시 간과 미생물 농도에 영향을 받는 것으로 나타났다.... -
2002년 하계 마산만의 수질개선을 위한 환경용량산정 모델링
홍석진, 이원찬, 박성은, 정래홍, 조윤식, 박종수, 김동명 한국습지학회 한국습지학회지 13 Pages
한국습지학회 한국습지학회지 2007, Vol.9 No.2 6 57-69 (13 pages)
This study focused on coastal water quality response to land-based and sediment pollution loads and estimation of the carrying capacity in Masan Bay using an ecological model with the data in summer of 2002. A residual current was simulated to have a slightly complicated pattern with ranging from 0.1 to 1.5 cm/s. In Masan Bay, pollutant materials cannot flow from the inner to the outer bay easily... 본 연구는 마산만에서 육상기원 오염부하와 퇴적물로부터의 부하에 의한 해수 수질의 응답특성과 환경용량을 2002년 하계의 관측 자료를 바탕으로, 생태계 모델링을 이용하여 산정하였다. 만 내측의 잔차류는 0.1∼1.5 cm/s의 크기로 비교적 현상과 유사하게 재현되었는데, 표층에서는 잔차류가 남향으로 저층에서는 북향류를 이루고 있어서, 육상으로부터 유입된 오염물질이 쉽게 만 외부로 빠져나가는 것이 힘들다. 모델링결과 COD 분포는 육상오염부하가 큰 만 내측에서 3 mg/L이상의 높은 값을 나타내고 있다. 목표수질 해역... -
Prospects of Activated Sludge Process in Japan - Its Past, Present, and Future -
Masanori Fujita 한국습지학회 한국습지학회지 7 Pages
한국습지학회 한국습지학회지 2007, Vol.9 No.1 6 61-67 (7 pages)
sludge. Fig. 3. SRT vs. quality of effluent : Quality of effluent measured, ● : Quality of effluent calculated, x : DO measured, --- : DO For treatment of wastewater contained persistent organic pollutant (POPs), Hashimoto proposed an operation of activated sludge process with a longer SRT to maintain effective microbes for POPs degradation in the system because the specific growth rate of the... -
팔당호 상류의 단위유역별 오염물질 유출특성 분석을 통한 중점관리 오염원 선정
김동우, 장미정, 한인섭, Kim. Dong Woo, Jang. Mi Jeong, Han. Ihn Sup 대한환경공학회 대한환경공학회지 11 Pages
대한환경공학회 대한환경공학회지 2014, Vol.36 No.5 367-377 (11 pages)
국내 최대 상수원인 팔당호는 하천형 호소로 분류되며, 팔당호 수질은 외부오염원의 영향이 크다. 이에 본 연구에서는 팔당호 상류지역의 오염원 분포와 오염물질 유출특성을 분석하여 BOD와 TP 관리를 위한 중점관리 오염원을 선정하고자 하였다. 이를 위해 11개 단위유역에 대한 오염원별 발생부하량과 배출부하량을 조사하고, 74개 소하천의 수질 유량 측정결과를 이용하여 유달부하량과 유역면적당 유달부하 밀도를 분석하였다. 오염원별 BOD, TP 발생부하량과 배출부하량, 유달부하량을 분석한 결과, BOD 발생부하량은 축산계가... -
Status of Constructed Wetlands in Nepal: Recent Developments and Future Concerns
Sher Bahadur Gurung, Franz Kevin F. Geronimo, Soyoung Lee, Lee-Hyung Kim 한국습지학회 한국습지학회지 7 Pages
한국습지학회 한국습지학회지 2017, Vol.19 No.1 5 45-51 (7 pages)
data banking, removal efficiency, quality of discharged water, compliance to water quality standard of Nepal and operation and maintenance were in vestigated. Considering removal efficiency per pollutant, Ka-1 achieved the greatest reduction for most pollutant followed by B-1, L-3, Ka-5 and K-1. Nepal has practiced CW technology for more than 2 decades but currently, development of technology... about 26 CW in Nepal. Specifically, factors including data banking, removal efficiency, quality of discharged water, compliance to water quality standard of Nepal and operation and maintenance were investigated. Considering removal efficiency per pollutant, Ka-1 achieved the greatest reduction for most pollutant followed by B-1, L-3, Ka-5 and K-1. Nepal has practiced CW technology for more than 2 decades but currently, development of technology was interrupted by the inefficient performance of...