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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Environmental Health Sciences
Journal Basic Information
Journal DOI :
Korean Society of Environmental Health
Editor in Chief :
Volume & Issues
Volume 29, Issue 4 - Dec 2003
Volume 29, Issue 3 - Sep 2003
Volume 29, Issue 2 - Jun 2003
Volume 29, Issue 1 - Mar 2003
Volume 29, Issue 5 - 00 2003
Selecting the target year
Studies on Marine Natural Antifoulant Laurinterol
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 1~8
The development of environmentally nontoxic or non-polluting antifouling additives that can be formulated in practical coating requires assay involving target organisms. Described here are the simple laboratory assays that have been developed using the barnacle, Balanus amphitrite, a common fouling organism found throughout temperate and tropical seas. One of the assays depends on synchronous year-round mass culture, the procedure for which is described, of nauplii larvae and cyprids larvae. The laboratory assays provided quantitative estimates of toxicity and settlement inhibition of the test compounds. Laurinterol (1), isolaurinterol (2), alpysinal (3), and aplysin (4) have been isolated from the Korean red alga Laurencia okamurae. Their structures were identified by spectral data in comparison with the literature data. Compounds 1-4 inhibited larval settlement of the barnacle B. amphitrite with EC
values of 0.18- 36
/ml. Com-pounds 2-4 showed larval toxicity against nauplii of the barnacle B. amphitrite with 5-10
/ml, while laurinterol (1) exhibited no toxicity at even 100
/ml. Therefore, laurinterol was expected as a promising natural antifoulant.t.
Differential Role of Solvents on Human Cytochrome P450 2El Activity in Intact HepG2 Cells
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 9~15
The modification of CYP2El activity is a matter of considerable interest because of its role in the metabolic activation of a variety of environmental toxicants. In the present study, the time-course of changes in human CYP2El activities was determined following treatment with solvents (acetone, dimethylsulphoxide or pyridine) using intact HepG2 cells transfected by human CYP2El. Hydroxylation of chlorzoxazone was used for the measurement of CYP2El activity. CYP2E1 protein level was increased upon cultivation of cells in the presence of the solvents for 24 hr. Determination of CYP2El activities after 24 ht cultivation with the solvents demonstrated that acetone or dimethylsulphoxide increased, whereas pyridine inhibited the activities. This differential effect of the solvents on CYP2El activities persisted to subsequent 24 ht. Competitive inhibition study suggested that pyridine has stronger binding affinity to CYP2E1 than acetone or dimethylsulphoxide. These results demonstrate that different binding affinity of the solvents to CYP2El plays important role in determining real CYP2El activity in intact cells after exposure to the solvents. Present study would be helpful in precise understanding of human CYP2El-mediated toxicity.
A Studies on Removal of Nutrient Material by Using Dropwort Field
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 16~20
Nitrogen(N) and phosphorus(P) in surface streams mainly lead to euthrophication. It aggravates water quality and consequently increases the purification costs. As a resolution of water contamination caused by household drainage through irrigation route by 70% of the 1,300 community residents in Eum-Am Myun, Seo-San city, was implemented biological self-purification method by growing Oenanthe Javanica along the polluted water tunnel. The contaminated water was efficiently purified after passing the dropwort field; DO conc. of effluent water was increased 8.3∼61.9% after through the drop wort field. HRT of experiment system was changed 0.05∼1.50/day. 50% of BOD was eliminated at the range above 12 mg/l of Influent BOD conc. Also, 50% of COD was eliminated at the range above 30 mg/l of Influent COD conc. Finnally, the influent T-N loading at range below 1.5 g/m
/d reduced 50% of Influent T-N conc., and so did influent T-P loading at the range below 0.03 g/m
/dwas reduced 50% of Influent T-P conc.
Distribution and Characteristics of Heavy Metals in the Fallout Dust Deposits at the Middle and High Schools of Some Cities in South Korea
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 21~27
The purpose of this study was to investigate the distribution and characteristics of heavy metals in the fallout dust deposits at the middle and high schools. We collected the samples at 60 schools in Kongju, Incheon and Daejeon on from September to November, 2001, and analyzed Cadmium(Cd), Copper(Cu), Lead(Pb) and Zinc(Zn) from them. Zn was the highest level as 551
79.9 ppm, and the next order were Pb, Cu, and Cd as 146.0
15.2 ppm, 98.7
14.4 ppm and 5.21
0.76 ppm, respectively. The rates of schools exceeding the soil environmental standards were 56.3% in Cd, 53.3% in Zn, 51.5% in Pb, and 31.7% in Cu, respectively. Cd and Pb were the highest levels at schools in Daejeon as 6.30
0.87 ppm and 171
26.1 ppm, respectively. Cu and Zn were the highest levels at schools in Incheon as 176.2
55.8 ppm and 919.8
185.7 ppm, respectively. At Incheon, Cu and Zn levels were significantly higher than Kongju(p=0.04l), and Daejeon(p=0.016), respectively. Total pollution index(PI) of heavy metals was 1.51
0.16. PI was 2.00
0.51 on Incheon, 1.50
0.13 on Daejeon, and 0.92
0.24 on Kongju. Correlations were 0.675 (p<0.05) between Cu and Cd, 0.663(p<0.05) between Cu and Zn, and 0.477 between Cd and Pb. In conclusion, Among heavy metals in the fallout dust deposits at schools, Cu and Zn were the highest levels at Incheon, Cd and Pb were the highest levels at Daejeon.
Comparison of Effects of Chaff and Sawdust on Aerobic Composting of Food Wastes
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 28~34
This study was performed to compare the effects of chaff and sawdust as bulking materials on temperature, pH, weight and volume reduction and salinity in aerobic composting of food wastes. Volume ratios of food wastes to chaff in reactor of Control, Ch-l, Ch-2, Ch-3 and Ch-4 were 4:0, 4:1, 4:2, 4:3 and 4:4, respectively. Volume ratios of food wastes to sawdust in reactor of Control, Sd-l, Sd-2, Sd-3 and Sd-4 were 4:0, 4:1, 4:2, 4:3 and 4:4, respectively. Reactors were operated for 24 days with 1 hour stirring by 1 rpm and 2 hours aeration per day. The lowering of the volume ratio of food wastes to chaff and sawdust resulted in the reaction at higher reaction temperature and the elongation of the high temperature reaction period. The lowering of the volume ratio of food wastes to chaff and sawdust resulted in faster pH increase. In the volume ratio of 4:3 and 4:4, pH increased faster in food-chaff mixtures than in food-sawdust mixtures. The lowering of the volume ratio of food wastes to chaff and sawdust resulted in faster steady state in the weight reduction rate and the volume reduction rate. The weight reduction rates of chaff mixtures were higher than those of sawdust mixtures, but the volume reduction rates of sawdust mixtures were more higher than those of chaff mixtures. Salinity increased as composting reaction proceeded, due to reduction in mass weight. The final salinity of Control was 2.79%, and the final range of salinities of chaff and sawdust mixtures were 2.18∼2.37% and 1.86∼2.05%, respectively.
Exhaled Nitric Oxide(NO) Among Adult Male Workers
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 35~42
Nitric Oxide(NO) is produced in many organs of the body, including the lung and airways, and it is detectable in the exhaled air. The measurement of exhaled NO(eNO) provides a simple non-invasive means for measuring airway inflammation, such as asthma. We measured eNO among adult male workers to examine the distribution of eNO in healthy people and to find factors affecting eNO. We measured eNO in a sample of 921 adult workers who also performed lung function test and skin prick test. Exhaled NO was measured in a sitting posture without using a nose clip and NO free gas. NO was measured at three expiratory rates(l8; 42; 71
/sec) and the flow rate of 71
/sec was used in analysis. The average eNO concentration was 5.29
2.98 ppb. The level increased with age but not significantly(P=0.0529). Exhaled NO showed positive relations to the height(P=0.0001), pollen 1 (P=0.0124), asthma history(P=0.0212), allergic rhinitis symptom(P=0.0302). Exhaled NO Concentration of smokers( 4.62 ppb) was significantly lower than that of nonsmokers(5.99 ppb; P<0.0001).
A Study on the Concentrations of Environmental Tobacco Smoke in PC Game Rooms in Seoul
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 43~49
ETS concentrations in the PC game rooms and factors affecting ETS concentrations were measured. Nicotine, 3-EP, respirable dust and UVPM were used as tracers for ETS. ETS concentrations are 2-3 times higher than those of other results. The concentration of ETS at the commercial district was higher than that of the residential district. The correlations between these tracers and SD/ ACH, a factor affecting to ETS concentration, were calculated. The correlation between 3-ethenylpyridine among tracers and SD/ACH was highest. The correlation between respirable dust and SD/ ACH was lowest. It was difficult to recommend respirable dust as a tracer of ETS.
A Study on Heavy Metals Removal in Aqueous Solution Using Autoclaved Chitosan
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 50~58
Removal of heavy metal ions (Cd
) by several chitosans was studied and the molecular weight of chitosan was investigated in order to examine the effect of autoclaving. Chitosan were divided into 3 groups (A type, controlled chitosan; B type, autoclaved for 15 min; C type, autoclaved for 60 min). The heavy metal removal capacity and rate of B type chitosan were higher than those of A type and B type chitosan. The molecular weight of chitosan was decreased by the increase of autoclaving time. Therefore, the heavy metal capacity was not well correlated to the molecular weight. Freundlich and Langmuir isotherm was determined from the experimental results of equilibrium adsorption for individual heavy metal ions on chitosan. Langmuir isotherm was well fitted to this experimental data. The heavy metal removal capacity of B type chitosan was in the order of Pb
Removal of Organics and Nirtogen in Wastewater Using 2 Stage A/O(RBC) Process
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 59~64
This study was conducted to investigate anoxic-RBC-anoxic-RBC process and its application to remove biologically organics and nitrogen. BOD and total-nitrogen(T-N) removal efficiencies were decreased as volumetric loading rate increased. But, the removal efficiency changes of T-N were little, as compared to BOD. Increase of internal recycle rate had few affect of BOD and T-N removal rates. Also, influent allocation(to 2nd anoxic reactor) had few affect of BOD removal efficiency rate. However, when the influent allocation rate was 30%, T-N removal efficiency was increased to 84.1 %. BOD/N ratio applied to 2nd anoxic reactor was increased to range of 3.65-4.37 as influent allocation rate increased to range 20∼35%. But, it might also cause adverse effect such as decrease of denitrification rate in excessive influent allocation rate.
Effect of Phosphate-based Inhibitors on Pipe Corrosion of Drinking Water Supply
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 65~71
The injection concentration of corrosion inhibitor increases under the pH 7, temperature of 2
, and alkalinity of 35 mg/l (as CaCO
), the corrosion rate gradually decreased. When the corrosion inhibitor of 10 mg/l is injected, the corrosion rate for carbon steel pipe, galvanized steel pipe, and copper pipe reduces for 37, 66 and 61 % respectively that it is more efficient on galvanized steel pipe and copper pipe. As a result of examination of corrosion rate at pH 6, 7, and 8 when injecting 10 mg/l of corrosion inhibitor under the conditions of 2
in water temperature and 35 mg/l (as CaCO
) in alkalinity, the efficiency of the corrosion inhibitor increases as the pH increases. For carbon steel pipe, it does not show much a difference with the change of the pH condition, but galvanized steel pipe and copper pipe clearly show the corrosion rate depending on the change of the pH condition. The efficiency of corrosion inhibitor is low as the concentration of residual chlorine is high, but it does not show a great influence at 0.4 mg/l or less. For each pipe type, in the case of carbon steel pipe, the range of increase of corrosion speed following the residual chloride is higher than the other pipe types. In the meantime, the effect following the residual chlorine in copper pipe is low.
Optimization of Substract Concentration in Cell Production of Fungal Chitosan
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 72~78
In the process of producing chitosan from crustacean shell, the use of excessive acid and alkli is causing the problems of environmental pollution and of production cost. In this study, one way to solve these problems is to cultivate fungi, then, to extract chitosan from the cell wall. By means of flask incubation and batch cultivation, the optimum cultivation conditions for mass production of continuous cultivation was found. Four strains used for the production of fungal chitosan were Gongronella butleri IF08080, Absidia coerulea IF05301, Rhizopus delemar IF04775, Mucor tuberculisporus IF09256. In flask incubation to select strain of producing much chitosan by means of experiment of the effect of initial pH, Absidia coerulea IFO 5301 had highest yield in FCs, 258.1
l at pH 6.5. In flask incubation under the optimum cultivation condition, temperature 27
, culture time 6days, glucose 2%, peptone 1%, (NH
0.1 %, Nacl 0.1 %, MgSO
0.01 %, the yield of DCW brought the highest yields. In batch bioreactor, the optimum cultivation condition was that cell suspended solution was 70
, aeration rate 0.5 l/min, agitation rate 800 rpm, culture time 36 hr. In continuous bioreactor, the optimum substrate flow rate was 4 ι/day.
A Study on the Manufacture of Activated Carbon for Water Treatment
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 79~85
The purpose of this study was to disclose the manufacturing process of activated carbon using coal. It investigated the influences on the physical properties that were manufactured activated carbon by using anthracite coal, bituminous coal under carbonizated and activated condition. The adsorption capacities of organic material were superior when the ash content was lower 5∼10%, and the iodine value was about 1,000 mg/g, the adsorption capacity decreased rapidly when ash content was over 15%. The manufactured activated carbon were found characteristics such as the iodine value was over 1,031 mg/g, the specific surface area was over 1,032
/g and the hardness was over 95% under manufacturing conditions which were carbonizated temperature of
( 180 minute), activated temperature of 95
(210 minute) and steam weight of 6
/min.100 g coal.
A Study on the H？？S Removal with Utilization of Seashell Waste(II) - The Characteristics of Sulfided Reaction Using Fixed Bed Reactor-
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 86~90
In this study, lots of methods have been studing to utilize energy and decrease contaminated effluents. There has been great progress on IGCC (Integrated gasification combined cycle) to reduce thermal energy losses. The following results have been conducted from desulfurization experiments using waste shell to remove H
S. Fixed bed desulfurization experiments, to obtain basic data for scale-up was indicated. Oyster was the best among the various sorbents, like the results of TGA. Especially, H
S removal efficiency of uncalcined oyster was the highest. When use oyster as desulfurization sorbents, calcination process was not needed. Thus, high desulfurization efficiency would be expected. Fixed bed reactor experiments were indicated particle size of sorbents. These had influenced on desulfurization capacity. As smaller particle size was found better desulfurization capacity. Large capacity difference was found between 0.613 mm and 0.335 mm. But, differences between 0.335 mm and 0.241 mm was relatively small. As bed temperature increased, H
S removal capacity increased. Therefore, both particle size and bed temperature should be considered to remove H
S by sorbents.
Characteristics According to the Size Distributions of Respirable Particulate During Yellow Sand Episode in Kosan, Jeju Island
Kim, Jeong-Ho ; Ahn, Jun-Young ; Han, Jin-Seok ; Lee, Jeong-Joo ;
Korean Journal of Environmental Health Sciences, volume 29, issue 3, 2003, Pages 91~96
This study was intended as an investigation of characteristics of background site atmospheric respirable particulate matters(RPM), and fine particles(<2.5
). The particle size distributions during the phenomenon of Yellow Sand(YS) occurs from April, 2001. Atmospheric aerosol particulate matter was directly collected on the Jeju island between 1 to 30, April, 2001 using an eight-stage cascade impacter(particle size range: 0.43-11
), and cyclone separator(cut size: 2.5, 10
). The episode of YS observed in background monitoring site, Kosan and appeared 2 times at sampling period. The mass concentrations of fine and coarse particles for YS episode were 34.2 and 59.6
/㎥, respectively, which were significantly increased amounts compared to 13.3 and 13.0
/㎥ for NonYS(NYS). Most size distributions had two peaks, one at 0.43∼.65
and the other at 3.3
. The result of analysis of water-soluble ion component indicated that sulfate was mainly ion component, but nitrate and calcium ion was significantly increased at the YS episode.