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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 31, Issue 12 - Dec 2009
Volume 31, Issue 11 - Nov 2009
Volume 31, Issue 10 - Oct 2009
Volume 31, Issue 9 - Sep 2009
Volume 31, Issue 8 - Aug 2009
Volume 31, Issue 7 - Jul 2009
Volume 31, Issue 6 - Jun 2009
Volume 31, Issue 5 - May 2009
Volume 31, Issue 4 - Apr 2009
Volume 31, Issue 3 - Mar 2009
Volume 31, Issue 2 - Feb 2009
Volume 31, Issue 1 - Jan 2009
Selecting the target year
Phytotoxicity and Bioavailability of Zinc, Zinc Oxide Nanoparticles to the Cucumis sativus
Sohng, Yi-Reh ; Nam, Yoon-Sun ; Lee, In-Sook ;
Journal of Korean Society of Environmental Engineers, volume 31, issue 7, 2009, Pages 467~472
Seedling growth test is used to assess toxicity of nanoparticles (NPs). This study evaluates toxicity of zinc, zinc oxide NPs on Cucumis sativus using two methods; phytagel and filter paper. From the comparison, phytagel method prevents precipitation of water insoluble NPS. Seeding length was negatively related to the exposed concentration of Zn, ZnO NPs in filter method. The median effective concentrations (EC50) for C. sativus exposed to Zn, ZnO NPs were estimated about 598, 600 mg/L in filter method. Bioaccumulation increased with the exposed concentration of Zn, ZnO NPs in only filter method. The results showed that the filter paper method was much better protocol than phytagel method.
Removal Characteristic of Arsenic by Sand Media Coated with both Iron-oxide and Manganese-oxide
Kim, Byeong-Kwon ; Min, Sang-Yoon ; Chang, Yoon-Young ; Yang, Jae-Kyu ;
Journal of Korean Society of Environmental Engineers, volume 31, issue 7, 2009, Pages 473~482
In this study, iron and manganese coated sand (IMCS) was prepared by mixing Joomoonjin sand with solutions having different molar ratio of manganese (
) and iron (
). Mineral type of IMCS was analyzed by X-ray diffraction spectroscopy. Removal efficiency of arsenic through As(III) oxidation and As(V) adsorption by IMCS having different ratio of Mn/Fe was evaluated. The coated amount of total Mn and Fe on all IMCS samples was less than that on sand coated with iron-oxide alone (ICS) or manganese-oxide alone (MCS). The mineral type of the manganese oxide on MCS and iron oxides on ICS were identified as
and mixture of goethite and magnetite, respectively. The same mineral type was appeared on IMCS. Removed amount As(V) by IMCS was greatly affected by the content of Fe rather than by the content of Mn. Adsorption of As(V) by IMCS was little affected by the presence of monovalent and divalent electrolytes. However a greatly reduced As(V) adsorption as observed in the presence of trivalent electrolyte such as
. As(III) oxidation efficiency by MCS in the presence of NaCl or
was two times greater than that in the presence of
. Meanwhile a greater As(III) oxidation efficiency was observed by IMCS in the presence of
. This was explained by the competitive adsorption between phosphate and arsenate on the surface of IMCS.
Evaluation of the Removal Characteristics of Pollutants in Storm Runoff Depending on the Media Properties
Kim, Tae-Gyun ; Cho, Kang-Woo ; Song, Kyung-Guen ; Yoon, Min-Hyuk ; Ahn, Kyu-Hong ; Hong, Sung-Kwan ;
Journal of Korean Society of Environmental Engineers, volume 31, issue 7, 2009, Pages 483~490
The aims of this study were to evaluate the removal efficiency for various pollutants in urban storm runoff by a filtration device, and to determine design parameters depending on filter media properties. Appropriate selection of filter media will affect the size and life time of the filtration device. Sets of column tests were performed in order to evaluate the removal efficiency by perlite and a synthetic resin. An investigation of surface properties including CEC (cation exchange capacity) and zeta-potential suggested that the perlite had a superior adsorption capability for cationic pollutants. TCODcr and turbidity were analyzed to investigate the removal characteristic of particulate pollutant. In both columns, the particles in the collected storm runoff was almost completely capture with a small EBCT (empty bed contact time) of 2.5 minutes. Complete clogging at the EBCT of 2.5 minutes occurred after 630 minutes in the perlite column and 810 minutes in the resin column. The removal efficiency of TCODcr and turbidity at the EBCT of 2.5 minutes decreased to below 70% due to an wall effect. The removal efficiency for dissolved pollutant (SCODcr) was negligible due to the insufficient contact time for adsorption. The removal of heavy metals (Cu, Zn, Pb) was mostly ascribed to the filtration of particles containing metals, since the relationship between CEC and the removal efficiency was not apparent. The result of this study would be valuable for the application of filtration device to control of urban storm runoff.
Development of VOCs Treatment Technology using High Efficiency Hybrid System with Multi-Scrone
Lim, Seong-Il ; Kim, Nor-Jung ; Kim, Sun-Mi ; Lee, Seong-Hun ; Kim, Sun-Uk ; Chang, Won-Seok ; Park, Dae-Won ; Kim, Lae-Hyun ; Kim, Jae-Hyung ;
Journal of Korean Society of Environmental Engineers, volume 31, issue 7, 2009, Pages 491~498
We studied to develop high-efficiency removal system of odor and VOCs(Volatile Organic Compounds) from environmental infrastructure facilities and oil refineries, painting facilities and so on. It can replace RTO and RCO. We tried an removal experiment for VOCs (toluene, xylene, benzene, MEK(methyl ethyl ketone), ethanol, formalin etc. and odor compounds (hydrogen sulfide, etc.). In process, as pre-treatment we used the scrubber with vortex flow (Multi-scrone) to remove the hydrophilic VOCs and as post-treatment, used fibrous bio-filter to remove the hydrophobic VOCs. This hybrid system remove with high efficiency both the hydrophilic VOCs and hydrophobic VOCs. And we tried to make this system to be compact. In experiment using Multi-scrone, contact time is 2~3 seconds and absorption scrubbing water is diaphragm-type electrolysis water. hydrophilic VOCs like ethanol and relatively hydrophilic odor compounds like hydrogen sulfide is excellent, these substances has been removed almost completely, respectively 95~99%, 93~97%. And for MEK, formalin also Showed a high removal efficiency, respectively 78~90%, 72~85%. But in experiment using Multi-scrone, the hydrophobic VOCs like BTX showed a low removal efficiency, respectively 16~22%, 12~18%, 8~16%. In hydrophobic VOCs, toluene removal experiment using fibrous bio-filter, early efficiency was low but after 10days, adaptation period showed high efficiency 85~95%. but in the mixed phase, toluene and MEK efficiency reduced 5~10%. this show microorganism treat first MEK easy to remove. The removal efficiency for MEK using the fibrous biofilter was stable, 80~92%. This hybrid system is also high economical efficiency for RTO. This system reduce more than 50% the cost of equipment and maintenance. As a result, we expect this technology is in the limelight as high efficiency treatment of VOCs in mid-low price.
Removal Charateristics of Erythrosine by Activated Carbon Adsorption
Lee, Jong-Jib ; Yoon, Sung-Wook ;
Journal of Korean Society of Environmental Engineers, volume 31, issue 7, 2009, Pages 499~504
Erythrosine is used a food coloring, ink and dye, etc. but erithrosine is rarely used in United States due to its known hazards. The adsorption characteristics of erythrosine by granular activated carbon were investigated in the batch adsorber and the packed column. The adsorptivity of activated carbon for erythrosine were largely improved by pH control. When the pH was 11 in the sample, the erythrosine could be removed 98% of initial concentration. It was estabilished that the adsorption equilibrium of erythrosine on granular activated carbon was successfully fitted by Freundlich isotherm equation in the concentration range from 10mg/L to 1,000mg/L. The characteristics of breakthrough curve of activated carbon packed column depend on the design variables such as initial concentration, bed height, and flow rate.
Absorption of Carbon Dioxide into Aqueous Potassium Salt of Serine
Song, Ho-Jun ; Lee, Seung-Moon ; Lee, Joon-Ho ; Park, Jin-Won ; Jang, Kyung-Ryong ; Shim, Jae-Goo ; Kim, Jun-Han ;
Journal of Korean Society of Environmental Engineers, volume 31, issue 7, 2009, Pages 505~514
Aqueous potassium salt of serine was proposed as an alternative
absorbent to monoethanolamine (MEA) and its
absorption characteristics were studied. The experiment has been conducted using screening test equipment with NDIR type gas analyzer and vapor-liquid equilibrium apparatus.
absorption/desorption rate and net amount of
absorbed in cyclic process are the criteria to assess the
absorption characteristics in this study. Effective
loading of potassium salt of serine and MEA are 0.425 and 0.230 respectively. Cyclic capacities are 0.354 and 0.298 for potassium salt of serine and MEA. The absorption rate of the potassium serinate decreased sharply at
loading is 0.1 and were maintained approximately at half of MEA. To enhance the absorption rate of aqueous potassium salt of serine, small quantities of rate promoters, namely piperazine and tetraethylenepentamine were blended, so that rich
loading were increased by 13.7% and 18.7% respectively. The rich
loading of potassium salt of serine was 29.2% and 35.0% higher than those of aqueous sodium and lithium salt of serine, respectively. The absorption rate of potassium salt of valine and isoleucine which have similar molecular structures to serine were lower than that of serine because of the presence of bulky side group. Precipitation phenomena during
absorption were discussed by the aid of literatures.
Attachment of Bacillus subtilis to Al-Fe Bimetallic Oxide-coated Sand : Effect of Oxyanions
Park, Seong-Jik ; Lee, Chang-Gu ; Han, Yong-Un ; Park, Jeong-Ann ; Kim, Song-Bae ;
Journal of Korean Society of Environmental Engineers, volume 31, issue 7, 2009, Pages 515~520
This study investigated the influence of oxyanions (nitrate, carbonate, phosphate) on the attachment of bacteria (Bacillus subtilis) to Al-Fe bimetallic oxide-coated sand using column experiments. Results showed that bacterial attachment to the coated sand was independent of nitrate concentration. Bacterial mass recovery remained constant (10.9
0.2%) with varying nitrate concentrations (0.1, 1, 10 mM). In case of carbonate, mass recovery increased from 25.6% to 39.0% with increasing carbonate concentration from 0.1 mM to 1 mM, and mass recovery also increased from 50.9% to 78.9% at the same concentration condition in case of phosphate. This phenomenon could be attributed to the hindrance effect of carbonate and phosphate to bacterial attachment to the coated sand. Meanwhile, with increasing carbonate/phosphate concentration from 1 mM to 10 mM, mass recovery decreased from 39.0% to 23.8% and from 78.9% to 52.6%, respectively. This phenomenon could be ascribed to the enhancement effect of free carbonate/phosphate ions present in solution phase due to increasing carbonate/phosphate concentration, which increase ionic strength and thus enhance bacterial attachment to the coated sand. In our experimental conditions, the effect of phosphate to bacterial attachment to the coated sand was the greatest among phosphate, carbonate, and nitrate.
A numerical Study for Improvement of Indoor Air Quality of Apartment House
Shin, Mi-Soo ; Kim, Hey-Suk ; Hong, Ji-Eun ; Jang, Dong-Soon ;
Journal of Korean Society of Environmental Engineers, volume 31, issue 7, 2009, Pages 521~530
This study has been made to execute a research in order to lead the improvement of indoor air quality, examining the indoor ventilation characteristics by using a numerical analysis method. To this end an extensive parametric investigation are made according to various external flow variables such as main wind direction and wind speed by season, building layout design, and location of ventilators, etc. in Daedeok Techno Valley, one of large-scaled apartment in Daejeon. It is observed there was a significant difference of main wind direction between summer and winter. The main wind direction in summer was a south wind, and on the contrary the direction in winter is northnorthwest, which is similar to the average main wind direction for 10 years. One of the important calculation results is that the change of wind direction causes a significant effect on the apartment ventilation by the change of pressure difference around each complex of apartment. In case of favorable area of ventilation, the indoor ventilation rate can meet 0.7 ACH from the standard value only with natural ventilation. On the contrary, in other area the value was much lower than the standard value. If the calculation result applies to the design of layout apartment or placement of ventilators, it will be greatly helpful to the energy saving because it can be parallel with the natural ventilation to help securing ventilation rate, not much depending on the mechanical ventilation.
A Study on the Thermal Decomposition and Injection Direction of Urea Solution Used in DeNOx Process
Moon, Seung-Hyun ;
Journal of Korean Society of Environmental Engineers, volume 31, issue 7, 2009, Pages 531~540
In this study, thermo-gravimetric analysis(TGA) was used to investigate the effect of urea concentration and heating rate on the ammonia(
) formation process from urea solution. A newly designed pipe nozzle was inserted through a 1,000 N
(C)/h oil firing boiler to compare the DeNOx efficiencies between the upward and downward nozzle. This experiment reveals the effect of path which an urea droplet goes through. Urea solution showed the same TGA graph without regard to the presence of oxygen. Heating rate had a great influence on the weight loss trend. But the concentration of urea solution between 10% and 40% did not affect so much the thermal decomposition temperature. Therefore, heating rate is more important factor on the thermal decomposition of urea than the concentration of urea solution. Three nozzles located at different positions showed similar DeNOx efficiencies such as 68.1%, 71.8%, 70.8% at the same temperature. Even though urea solution was injected for the same zone, the injection direction made much difference in DeNOx efficiency. A upward nozzle showed 68.1% and downward nozzle 9.5%. This results illustrate the importance of heating rate.
Removal of Heavy Metal and Phenol from Aqueous Solution Using Fe(III) loaded Adsorbent
Kim, Seok-Jun ; Kim, Won-Gee ; Lee, Seung-Mok ; Yang, Jae-Kyu ; Lee, Nam-Hee ;
Journal of Korean Society of Environmental Engineers, volume 31, issue 7, 2009, Pages 541~548
Iron coated media (activated carbon, sand and starfish) were prepared at pH 4 and applied for the treatment of landfill leachate containing organic compounds and soluble metal ions such as
in batch and column experiment. The amount of iron coated in media was analyzed with EPA 3050B method. The removal efficiency of metal ions and phenol was compared with iron coated media. The amount of iron coated in Fe-AC and ICS(iron coated sand) were 1,612 mg/kg and 1,609 mg/kg, respectively, while it was higher with 1,768 mg/kg in ICSF(iron coated starfish). The result of batch study represent the highest removal efficiency in the treatment of wastewater using iron coated starfish. In column study, the removal efficiency of phenol and metal ions was higher in multi-layered system of ICS, Fe-AC and ICSF compared to single layered system. Breakthrough time in the effluent was relatively enhanced for
in multi-layered system while the removal efficiency of
were not varied much. Therefore, multi-layered system was identified as the better system for the treatment of wastewater containing of metal ions and organic compound.
A Study on Persulfate Oxidation to Remove Chlorinated Solvents (TCE/PCE)
Song, Kyoung-Ho ; Do, Si-Hyun ; Lee, Hong-Kyun ; Jo, Young-Hoon ; Kong, Sung-Ho ;
Journal of Korean Society of Environmental Engineers, volume 31, issue 7, 2009, Pages 549~556
In situ chemical oxidations (ISCO) are technologies for destruction of many contaminants in soil and groundwater, and persulfate has been recently studied as an alternative ISCO oxidant. Trichloroethylene (TCE) and tetrachloroethylene (PCE) were chosen for target organic compounds. The objective of this study is to demonstrate the influence of initial pH (3, 6, 9, 12), oxidant concentrations (0.01, 0.05, 0.1, 0.3, 0.5 M), and contaminants concentrations (10, 30, 50, 70, 100 mg/L) on TCE/PCE degradation by persulfate oxidation. The maximum TCE/PCE degradation occurred at pH 3, and the removal efficiencies with this pH condition were 93.2 and 89.3%, respectively. The minimum TCE/PCE degradation occurred at pH 12, and the removal efficiencies were 55.0 and 31.2%, respectively. This indicated that degradation of TCE/PCE decreased with increasing the initial pH of solution. Degradation of TCE/PCE increased with increasing the concentration of persulfate and with decreasing the concentration of contaminants (TCE/PCE). The optimum conditions for TCE/PCE degradation were pH 3, 0.5 M of persulfate solution, and 10 mg/L of contaminant concentration. At these conditions, the first-order rate constants (
) for TCE and PCE were 1.04 and 1.31
Recovery of Presource from Sewage Sludge by a Struvite-forming Method
Choi, Won-Joon ; Park, Kyu-Man ; Yoon, Bae-Geun ; Kim, Min-Chul ; Oh, Kwang-Joong ;
Journal of Korean Society of Environmental Engineers, volume 31, issue 7, 2009, Pages 557~564
The objective of this study is to efficiently recover phosphorus contained in sewage sludge by a struvite-forming method. The performances were evaluated under various operating conditions(elution with the kind of acid, Mg-compound and temperature) in order to reach the optimum conditions of struvite-forming. As a result, as an elution solution, the elution efficiency of
was 2.65 times higher than that of HCl. Also, the precipitation efficiency of struvite was the highest (97.4%) in case of using
as Mg-compounds at
. However, the side reaction by Fe, Al and Zn appeared in process of phosphorus recovery. To solve some problems caused by side reacton, large quantities of co-precipitation materials produced by side reaction were removed by precipitating phosphorus compounds in pH 7. Consequently, the recovery efficiency of phosphorus by a struviteforming method was 82.99%, and purity of the recovered struvite product was high.
A Study on Greenhouse Gas Inventories for Regional Governments (A Case Study of Jeonbuk Province)
Jang, Nam-Jung ;
Journal of Korean Society of Environmental Engineers, volume 31, issue 7, 2009, Pages 565~572
Greenhouse gas(GHG) inventories and basic strategies for Jeonbuk regional government were established to reduce greenhouse gas emissions. The method to construct GHG inventories of Jeonbuk followed the 'Revised IPCC 1996 Guidelines'which was used for the 'Third National Communication of the Republic of Korea under UNFCCC'. Korean government could use primary energy consumption for the energy industries section in the national GHG inventories. However, regional governments should use secondary energy consumption (included electricity consumption) for the energy industries section for their GHG inventories because they could not control the emission of energy transformation section. In the result of Jeonbuk GHG inventories in 2006, carbon dioxide(
) emissions from fuel combustion covered 87.1% of total emissions. Methane(
), carbon dioxide(
) from other sections, nitrous oxide(
) and F-gas(HFCs, PFCs,
) accounted for 8.1, 2.2, 1.6 and 1.0% of total emissions, respectively. The sectional emission decreased in the order of the energy(88.0%), agriculture(7.6%), waste(2.3%) and industrial processes(2.1%) section. The energy industries section that contained electricity consumption was the most dominant emission source in the energy section. F-gas consumption, rice cultivation and waste incineration were main emission sources in the industrial processes, agriculture and waste section, respectively. In this study, basic directions of each section were established by the results of Jeonbuk GHG inventories in 2006.