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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society of Environmental Engineers
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Journal DOI :
Korean Society of Environmental Engineering
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Volume & Issues
Volume 32, Issue 12 - Dec 2010
Volume 32, Issue 11 - Nov 2010
Volume 32, Issue 10 - Oct 2010
Volume 32, Issue 9 - Sep 2010
Volume 32, Issue 8 - Aug 2010
Volume 32, Issue 7 - Jul 2010
Volume 32, Issue 6 - Jun 2010
Volume 32, Issue 5 - May 2010
Volume 32, Issue 4 - Apr 2010
Volume 32, Issue 3 - Mar 2010
Volume 32, Issue 2 - Feb 2010
Volume 32, Issue 1 - Jan 2010
Selecting the target year
Performance Characteristics of PM10 and PM2.5 Samplers with an Advanced Chamber System
Kim, Do-Hyeon ; Kim, Seon-Hong ; Kim, Ji-Hoon ; Cho, Seung-Yeon ; Park, Ju-Myon ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 8, 2010, Pages 739~746
The purposes of this study are 1) to develop an advanced chamber system within
of air velocity at the particulate matter (PM) collection area, 2) to research theoretical characteristics of PM10 and PM2.5 samplers, 3) to assess the performance characteristics of PM10 and PM2.5 samplers through chamber experiments. The total six one-hour experiments were conducted using the cornstarch with an mass median aerodynamic diameter (MMAD) of
and an geometric standard deviation of 2.0 at the two different air velocity conditions of 0.67 m/s and 2.15 m/s in the chamber. The aerosol samplers used in the present study are one APM PM10 and one PM2.5 samplers accordance with the US federal reference methods and specially designed three mini-volume aerosol samplers (two for PM10 and one for PM2.5). The overall results indicate that PM10 and PM2.5 mini-volume samplers need correction factors of 0.25 and 0.39 respectively when APM PM samplers considered as reference samplers and there is significant difference between two mini-volume aerosol samplers when a two-way analysis of variance is tested using the measured PM10 mass concentrations. The PM10 and PM2.5 samplers with the cutpoints and slopes (PM10:
) theoretically collect the ranges of 86~114% and 64~152% considering the cornstarch characteristics used in this research. Furthermore, the calculated mass concentrations of PM samplers are higher than the ideal mass concentrations when the airborne MMADs for the cornstarch used are smaller than the cutpoints of PM samplers and the PM samplers collected less PM in another case. The chamber experiment also showed that PM10 and PM2.5 samplers had the bigger collection ranges of 37~158% and 55~149% than the theocratical calculated mass concentration ranges and the relatively similar mass concentration ranges were measured at the air velocity of 2.15 m/s comparing with the 0.67 m/s.
Removal Characteristics of Volatile Organic Compounds in Biofilters and Stoichiometric Analysis of Biological Reaction by Carbon Mass Balance
Kim, Dae-Keun ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 8, 2010, Pages 747~753
This study was performed to investigate the removal characteristics of volatile organic compounds (VOCs) in the gasphase biofilters, and to propose a stoichiometric analysis approach to characterize biological reaction through carbon mass balance. The VOCs studied were toluene, styrene, methyl ethyl ketone (MEK), and methyl isobutyl ketone (MIBK) as a single substrate for each biofilter. The critical loading rate was determined to be
for toluene, styrene, MEK, and MIBK, respectively. The obtained results indicated that the critical loading rate was well correlated the octanol-water partition coefficient. In the analysis of carbon mass balance, carbon recovery to
became relatively lower as substrate loadings increased, but higher for carbon recovery to biomass. Stoichiometric analysis revealed that biomass yield increased as substrate loadings increased, and its coefficient (g biomass/g substrate) varied from 0.31 to 0.57 for toluene, 0.29 to 0.57 for styrene, 0.08 to 0.56 for MEK, and 0.14 to 0.53 for MIBK.
Removal Characteristics of Geosmin in a Slow Sand Filteration Process
Son, Hee-Jong ; Yoom, Hoon-Sik ; Jang, Seong-Ho ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 8, 2010, Pages 754~760
Geosmin removal by biodegradation was investigated in lab-scale slow sand filtration column with different empty bed contact times (EBCTs) and water temperature. Schmutzdecke layer was built up after 30 days operation and biomass and activity were
, respectively. The attached bio-film microorganisms in schmutzdecke layer were isolated and identified. The dominant species was Pseudomonas sp. that had occupied 56%. Removal efficiencies of dissolved organic carbon (DOC) and geosmin were 27% and 95% after 30 days operation. In lab-scale slow sand filtration column, geosmin and DOC removal efficiencies were 62% and 10% at
, respectively. And increasing water temperature (
) increased the geosmin and DOC removal efficiencies (88~100% and 25~42%) in lab-scale slow sand filtration column. Geosmin and DOC biodegradation rates (k) in the schmutzdecke layer (in the upper 5 cm filter bed) were
, respectively. It were about 18~32 times and 20~51 times of the rates in the deeper filter bed (5~60 cm).
Development of La(III)-zeolite Composite for the Simultaneous Removal of Ammonium Nitrogen and Phosphate in Confined Water Bodies
Paek, Joo-Heon ; Kim, Keum-Yong ; Ryu, Hong-Duck ; Lee, Sang-Ill ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 8, 2010, Pages 761~766
This study was aimed to propose La(III)-zeolite composite which can effectively and simultaneously remove ammonia and phosphate in confined water bodies such as lakes and ponds. The optimum ratio of La(III):zeolite for the simultaneous removal of ammonia and phosphate was 0.0048 La(III) g:1 zeolite g. The drying temperature of La(III)-zeolite composite severely affected phosphate adsorption showing optimum condition at room temperature. It was revealed that the optimum dosage of La(III)-zeolite composite was 4.052 g/L at adsorption time of 90 min. The presence of alkalinity in aqueous solution brought positive effect on phosphate adsorption. Detachment of La(III) from La(III)-zeolite composite, which was dried at room temperature, was not observed in aquous solution. It indicates that La(III)-zeolite composite could effectively block phosphate released from sediment.
A Study of Air Stripping and Ozonation Characteristics of Methyl Tert-butyl Ether (MTBE)
Lee, Cheal-Gyu ; Kim, Moon-Chan ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 8, 2010, Pages 767~773
In recent years, there has been considerable concern over the release of methyl tert-butyl ether (MTBE), a gasoline additive, into the aquifers used as potable water sources. MTBE readily dissolves in water and has entered the environment via gasoline spills and leaking storage tanks. In this study air stripping and ozonation of MTBE in aqueous solution were performed in a laboratory scale batch reacter. The mass transfer rate (N) was evaluated and a values about
was found. In the ozonation of MTBE a 8.3% decrease of the COD and a 6.5% decrease of the TOC lead to BOD/COD = 0.03. The peudo first-order rate constants of the ozonation of MTBE was
. The resulting Ea of 4.80 kcal；mol-1 was observed for molecular ozone reactions.
Removal Mechanism of Phosphorus in Wastewater Effluent using Coagulation Process
Han, Seung-Woo ; Kang, Lim-Seok ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 8, 2010, Pages 774~779
The experimental results for the analysis of aluminum hydrolysis species with PACls (polyaluminum chloride) prepared by different basicity (r value) showed that monomeric Al species were reduced while polymeric Al species were increased with an increase in basicity for PACls. The PACl with 2.2 of r value contained the highest amount of polymeric Al species. According to the experimental results for the phosphorus removal, the alum and PACl (r=0), which consisted of mainly monomeric Al species, were the most effective for phosphorus removal. Therefore, it was concluded that the Al coagulant containing higher amount of monomeric or lower molecular Al species would be more beneficial for phosphorus removal.
Changes of Microbial Community Structure According to a Changes of Season and Influent Characteristics in Biological Wastewater Treatment
Son, Hyeng-Sik ; Son, Hee-Jong ; Kim, Mi-A ; Ryu, Eun-Yeon ; Lee, Geon ; Lee, Sang-Joon ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 8, 2010, Pages 780~786
The bacterial community structure in biological reactor in wastewater treatment system was investigated by denaturing gradient gel electrophoresis (DGGE) and fluorescent in situ hybridization (FISH). Samples were collected at different three points in wastewater treatment system. Through treatment processes, BOD (biochemical oxygen demand) and COD (chemical oxygen demand) of was removal efficiency was 83.1~98.6%, 67.2~85.2% respectively. Microbial community of aerobic tank and oxic tank were similar but anoxic tank was different (RRP group was increased about tripple) by DGGE and FISH in sludge (2007 October and 2008 January). Samples in 2007 October and 2008 January were dominant
-Proteobacteria and CF group respectively. Sludge in 2008 April were different comparing former results dominant others as 65~80%. Others group was dominant. Eubacteria by FISH with the probe EUB338 was about
. It could be successfully observed bacterial community in biological wastewater system.
Prediction and Evaluation of Indoors Noise Level of Exhibition Room in Museum by Road Traffic Noise
Lee, Kook-Hyun ; Park, Yeong-Ji ; Kim, Jae-Soo ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 8, 2010, Pages 787~794
Recently, with sudden increase of supplying rate of cars and quantity of goods transported, traffic noisy becomes one of important factors obstruct environment of exhibition and view facilities have purpose in calmness and unsatisfaction about this is high now. Therefore, in case of exhibition and view facilities, it has to be grasped that satisfaction degree about the noisy in and out of the exhibition room by performing effect valuation on traffic noisy from design step. However the level of internal noise cannot be measured at the design phrase of the structure due to the noise of traffic. Up until now a walls transmission loss, based on the law of mass, is predicted using this method. However measuring the internal sound level after actual construction reveals that there is a large difference from measurements made at the design stage, and it is very difficult to find a solution after the opening of the structure. From research looking from this perspective the internal sound level was predicted- calculating the internal sound absorption ability, using acoustic simulation and loss prevention of an insulated wall- based on data collected to evaluate the internal sound of an exhibition room at a Folk Museum adjacent to a freeway. The results of this research are considered to provide important data for the prediction of internal sound level at the time of construction of exhibition facilities similar to this.
Bioassessment and Comparison of Toxicity of Arsenics based on the Results of Various Bioassays
Kong, In-Chul ; Kwon, Hyo-Jung ; Ko, Kyung-Seok ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 8, 2010, Pages 795~801
The acute toxicity of arsenic compounds was assessed and compared using following four bioassays; bioluminescence activity of the recombinant strain RB1436, germination of four different seeds,
-glucosidase activity produced by Bacillus lichemiformis, acute genetic revertant mutation using mutant strain Salmonella typhimurium. Different sensitivities were observed among tested bioassays, but generally the toxicity by arsenite was greater than that of arsenate. Among tested four seeds, sensitivities of Lactucus and Raphanus were greater than others, and these two seed types were appeared as proper type for bioassay. High revertant mutation ratio (5.1) was observed with 1 mg/L arsenite, indicating high mutagenicity. The sensitivity of
-glucosidase activity on arsenic compounds was much lower than other methods. The evaluation of interactive toxic effects using various bioassays may comprise a useful tool for the bioassessment of environmental pollutants.
Application of Priority Order Selection Technique for Water Quality Improvment in Stream Watershed by Relationship of Flow and Water Quality
Lim, Bong-Su ; Cho, Byung-Wook ; Kim, Young-Il ; Kim, Do-Young ;
Journal of Korean Society of Environmental Engineers, volume 32, issue 8, 2010, Pages 802~808
This study was carried out to apply the method of priority order selection for water quality improvement of watershed. The monitoring of flow and water quality, grouping branch streams and discharge load density were estimated on 18 branch streams located in middle and lower area of Geum River, Chungcheongnam-do. Based on average BOD concentration of stream at low flow, the results of the water quality analysis of stream which excess river living standard class 2 (less than BOD 3 mg/L) are Jeongancheon, Bangchukcheon, Gilsancheon, Jocheon, Seokseongcheon and Ganggyeongcheon. As a result of grouping stream, stream that have more than
of flow and more than 3.0 mg/L of average BOD concentration such as Group A are Jocheon, Seokseongcheon, Ganggyeongcheon and Jeongancheon. In Group A, stream corresponds to over than discharge load density as of 10 BOD kg/
is Jocheon, Seokseongcheon and Ganggyeongcheon. In view of the selected results to improve water quality basin through monitoring of flow and water quality, grouping stream, and estimation of discharge load density, Jocheon in Yeongi, Seokseongcheon located on the border of Buyeo and Nonsan, Ganggyeongcheon on Nonsan such as stream basin were urgent to improve water quality.