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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society of Environmental Engineers
Journal Basic Information
Journal DOI :
Korean Society of Environmental Engineering
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Volume & Issues
Volume 37, Issue 12 - Dec 2015
Volume 37, Issue 11 - Nov 2015
Volume 37, Issue 10 - Oct 2015
Volume 37, Issue 9 - Sep 2015
Volume 37, Issue 8 - Aug 2015
Volume 37, Issue 7 - Jul 2015
Volume 37, Issue 6 - Jun 2015
Volume 37, Issue 5 - May 2015
Volume 37, Issue 4 - Apr 2015
Volume 37, Issue 3 - Mar 2015
Volume 37, Issue 2 - Feb 2015
Volume 37, Issue 1 - Jan 2015
Selecting the target year
Comparison of Al(III) and Fe(III) Coagulants for Improving Coagulation Effectiveness in Water Treatment
Han, Seung woo ; Kang, Lim seok ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 6, 2015, Pages 325~331
DOI : 10.4491/KSEE.2015.37.6.325
The experimental results of the characteristics of aluminum based and ferric based coagulants for the Nakdong River water showed that the main hydrolysis species contained in alum and
are monomeric species of 98% and 93.3%, respectively. The PACl of r=1.2 produced by the addition of base contained 31.2% of polymeric Al species and the PACl of r=2.2 contained 85.0% of polymeric Al species, as showing more polymeric Al species with increasing r value. Coagulation tests using Al(III) and Fe(III) salts coagulants for the Nakdong River water showed that the coagulation effectiveness of turbidity and organic matter was high in the order of
> PACl (r=2.2) > PACl (r=1.2) > alum.
has showed better flocculation efficiency than Al(III) salts coagulants. In addition, in case of Al(III) coagulants, the Al(III) coagulants of higher basicity, which contained more polymeric Al species, resulted in better coagulation efficiency for both turbidity and organic matter removed. The optimum pH range for all of the coagulants investigated was around pH 7.0 under the experimental pH range of 4.0~9.5. Especially, the highest basicity PACl (r=2.2) and
were considered as more appropriate coagulants for the removal of turbidity in the case of raw water exhibiting higher pH.
Variation of Nitrogen Removal Efficiency and Microbial Communities Depending on Operating Conditions of a CANON Process
Jo, Kyungmin ; Park, Younghyun ; Cho, Sunja ; Lee, Taeho ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 6, 2015, Pages 332~339
DOI : 10.4491/KSEE.2015.37.6.332
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
, TN removal efficiency also rapidly decreased but gradually increased again up to
%. 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.
Reduction of PCBs in Contaminated Marine Sediments by Using Fenton-like Reaction with Surfactants
Choi, Jin Young ; Kim, Kyoungrean ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 6, 2015, Pages 340~348
DOI : 10.4491/KSEE.2015.37.6.340
Removal efficiency of PCBs in contaminated marine sediments treated by Fenton-like oxidation combined with surfactant was investigated in this research in order to achieve remediation of PCBs. A washing treatment using various concentrations of hydrogen peroxide (1% and 15%) and surfactants (Triton X-100, Tween 60 and Tween 80) was evaluated at various conditions in laboratory scale experiments. The mean removal efficiencies of tPCBs varied from 24.1 to 46.7% in the sediments for 1 hour duration of the treatments. The concentration of tPCBs in contaminated marine sediments after the simultaneous treatment with hydrogen peroxide and surfactant satisfied the domestic environmental standards for the beneficial use of sediments. When suitable surfactant was used for Fenton-like oxidation, the removal efficiency of tPCBs at low concentration of hydrogen peroxide was similar to that at high hydrogen peroxide concentration. Thus the efficient removal of PCBs in contaminated marine sediments could be achieved through treatment with Fenton-like oxidation combined with surfactant washing.
Distribution and Potential Human Risk Assessment of Trace Metals in Benthic Fish Collected from the Offshore of Busan, Korea
Choi, Jin Young ; Kim, Kyoungrean ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 6, 2015, Pages 349~356
DOI : 10.4491/KSEE.2015.37.6.349
Trace metals concentrations in the tissue of edible marine fish (4 species), olive flounder (Paralichthys olivaceus), Korean rockfish (Sebastes schlegelii), file fish (Stephanolepis cirrhifer) and abbysal searobin (Lepidotrigla abyssalis), collected near the Yongho wharf in Busan were determined to assess the potential human health risk (HRA) of trace metals by fish consumption. Levels of Li, Cr, Ni, Cu, Zn, As, Cd, and Pb in the fish tissue were
respectively. The estimated daily intakes of Cu and Zn and the estimated weekly intakes of As, Cd, and Pb from the fish collected near the Yongho wharf were 0.0032, 0.054-0.18% of PMTDI (provisional maximum tolerable daily intake) and 13, 0.0041, 0.020% of PTWI (provisional tolerable weekly intake) which were set to evaluate the food safeties by the JFCFA (The Joint FAO/WHO Expert Committee on Food Additives). Lifetime cancer risk and target hazard for local residents due to those fish consumption were found to be negligible.
Preparation and Adsorption-photocatalytic Activity Evaluation of TiO
-Coconut Shell Powder Composite (TCSPC)
Lee, Min Hee ; Kim, Jong Kyu ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 6, 2015, Pages 357~362
DOI : 10.4491/KSEE.2015.37.6.357
-Coconut Shell Powder Composite (TCSPS), prepared by the controlled sol-gel method with subsequent heat treatment, was evaluated as an innovative photocatalytic absorbent for the removal of methylene blue. Optimal preparation conditions of TCSPC were obtained by a response surface methodology and a central composite design model. As compared with the results obtained from one-factor-at-a-time experiments, the values were approximated to the nearest condition of these values and the following experimental parameters were set as the optimum :
calcination temperature and 20 g of coconut shell powder loading amount.
Production of Polyhydroxyalkanoates (PHAs) from Sequencing Batch Reactor Using Synthetic Wastewater
Son, Jae-hyup ; Cha, Sang-Hyeop ; Park, Jun-mo ; Park, Hung-suck ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 6, 2015, Pages 363~370
DOI : 10.4491/KSEE.2015.37.6.363
The production of polyhydroxyalkanoates (PHAs) using Sequencing Batch Reactor (SBR) was investigated. The experiments were performed in two fabricated SBRs (4 L) of different oxidation state. Synthetic wastewater was used as substrate, using C/N/P ratio of 42:10:1. SBR 1 and SBR 2 were operated in aerobic dynamic feeding (ADF) and anaerobic/oxic dynamic feeding (AODF) condition, respectively. ADF provide feast and famine in aerobic condition, while AODF in anaerobic/oxic condition. PHAs production was found high in AODF than AOF. Maximum PHAs content of 40.0% (w/w)of biomass were produced in AODF mode. Produced PHAs structural and thermal property were good.
A Study on the Characteristics of Chrysotile and Amosite by Acid and Heat Treatment
Lee, Jin Hyo ; Lee, Su Hyun ; Kang, Mi Hye ; Bae, Il Sang ; Kim, Ik Soo ; Han, Kyu Mun ; Eo, Soo Mi ; Jung, Kweon ; Koo, Ja Yong ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 6, 2015, Pages 371~379
DOI : 10.4491/KSEE.2015.37.6.371
This study is purposed to seek the characteristics of both asbestos in accordance with acid and heat treatment for chrysotile and amosite used mainly as building materials. Results of acid treatment, the refractive index, the elongation sign, the extinction of acid-treated chrysotile were mostly similar to those of untreated chrysotile regardless of pH, elapsed time. But the characteristics of acid-treated chrysotile were different from those of untreated chrysotile after 8 weeks, at pH 1.2 acidic solution. When chrysotile treated with acid, weight ratio (%) of O and Mg fluctuated greatly in accordance with acid treatment unlike Si. But the change of constituents ratio (%) was small as time passed after acid treatment. The refractive index, the elongation sign and the extinction of acid-treated amosite were mostly similar to those of untreated amosite regardless of pH, elapsed time. When amosite was treated with acid, weight ratio (%) of Fe slightly increased. But in case of O, a contrary tendency was seen. Results of heat treatment, the higher the temperature, the more increased the refractive index of chrysotile. When chrysotile was heated for 10 minutes at
, the elongation sign of chrysotile changed from positive(+) to negative(-). The extinction of chrysotile didn't change apparently in accordance with heat treatment. Also weight ratio (%) of O and Mg fluctuated greatly in accordance with heat treatment unlike Si. The higher the temperature, the more increased the refractive index of amosite. The elongation sign and the extinction of amosite didn't change apparently in accordance with heat treatment. Also weight ratio (%) of O and Fe fluctuated greatly in accordance with heat treatment. But weight ratio (%) of Si and Mg of heated amosite were mostly similar to those of untreated amosite regardless of temperature, heating time.
Concentration Distribution of Volatile Organic Compounds in the Ambient Air of an Industrial Shipbuilding Complex : A Case Study
Lee, Myoung-Eun ; Park, Eun-Ok ; Chung, Jae-Woo ;
Journal of Korean Society of Environmental Engineers, volume 37, issue 6, 2015, Pages 380~386
DOI : 10.4491/KSEE.2015.37.6.380
In this study, the spatial and temporal distribution of volatile organic compounds (VOCs) in an industrial shipbuilding complex was monitored, and the local characteristics estimated. The major VOC component measured at all of the sampling sites were almost the same as those found at an indoor painting facility, indicating that painting works conducted in the shipyards were a significant source of VOCs in the vicinity of shipbuilding areas. The main parameters affecting the VOCs distribution were the distance between the sampling site and painting work place, and the intensity of the painting works. A quite broad range of VOC concentrations were observed in all of the sampling sites, depending on the intensity of painting works in nearby areas suppressing the typical seasonal and temporal variation trends in VOCs observed in urban areas.