• Journal of Environmental Science International
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• v.20 no.7
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• pp.811-818
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• 2011

Daphnia Magna Stratus has been widely accepted as useful species for estimating the toxicity of chemicals to aquatic invertebrate and recommended as species for the testing chemicals from the international guideline as well as Korean guideline. The study was performed for the acute toxicity test by using water flea(D. Magna) for effluents from several wastewater treatment plants and drainage canals in GyeongBuk area. Five heavy metals, 1,4-Dioxane and Perchlorate were tested. Most Toxicity Units(TU) of Industrial wastewater effluents were less than 1 which means effluent was not toxic to D. Magna. However, effluents containing 1,4-Dioxane and Perchlorate were significantly toxic to D. Magna. Therefore, facilities should reduce the 1,4-dioxane since new regulations will force them after the year of 2011.

• Proceedings of the Korea Society of Environmental Biology Conference
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• 2004.12a
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• pp.127-131
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• 2004

The toxicity of 54 selected process effluents of 16 industry classifications in Korea was evaluated by bioassay test using fish Oryzias latipes, invertebrate Daphnia magna, algae Selenastrum capricornutum and bacteria Vibrio fischeri. Our results demonstrate that the toxicity assessment, such as bioassay test, is effective and of practical use for industrial wastewater management in 54 selected effluents with the limitation of the physico-chemical permit. Among 54 effluents, 4 sample failed physico-chemical permit limitation and 50 passed it. The physcio-chemical measurement items and permit concentrations on the present Water Quality Conservation Act are low related a ecotoxicity.

• Journal of Korean Society on Water Environment
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• v.21 no.3
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• pp.274-276
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• 2005

To investigate bioassay for toxic level evaluation of wastewater, toxic levels were checked influents and effluents of 6 wastewater discharge facilities with Daphnia magna and Vibrio fischeri. In view of test duration, D. magna is preferred at 48 hours. And it was judged to efficient that one of the two was choosen for toxicity test method (Daphnia test and Vibrio test). Analysis data for wastewater is average toxic level for influent more higher than effluent. And effluent toxic level is sharp decrease than effluents.

• Journal of Microbiology and Biotechnology
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• v.15 no.1
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• pp.147-154
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• 2005

A survey for vesicular-arbuscular mycorrhizae (VAM) status was undertaken in three different industrially polluted sites at Uyyakondan channel of Senthanneerpuram area in Trichy, India. The soils and the effluents were acidic, and contained higher Zn (621 to 711 ppm) than the other heavy metals, such as Cu, Pb, and Ni. Eighteen plant species were collected from the rhizosphere soils, and 13 species were positive for VAM colonization. Fifteen VAM fungal species were isolated from the plant species. The number of VAM fungal spores from the soils ranged from 45 to 640 per 100 g of soil. There was a significant correlation observed between the number of spores and percentage root colonization, as exemplified by Acalypha indica (45 and 20%, respectively) and Paspalum vaginatum (640 and 98%, respectively). Hostspecific and site-specific associations were observed in site 2; particular VAM species, Gigaspora gigantea and Glomus fasciculatum, were specific to particular host plants, Phyllanthus maderaspatensis and A. indica, respectively, even though Eclipta prostrata and Physalis minima were maximally associated with 8 VAM species. G. fasciculatum was found in 11 plant species and predominant VAM species. These results led us to conclude that VAM fungi are associated with a majority of the plants in the industrial polluted sites and support the plants to survive in the acidic soils, polluted with heavy metals of the industrial effluents.

• Journal of Korean Society of Environmental Engineers
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• v.37 no.10
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• pp.590-595
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• 2015

Sampling campaigns were conducted for hazardous chemicals and heavy metals in influents and effluents of industrial wastewater treatment plants (WWTPs) in Korea for best management practices (BMPs) of those pollutants through the plants and the receiving water bodies. Twenty seven WWTPs, receiving wastewater from industrial complexes and treating more than $2,000m^3/day$, were selected for the sampling campaign. Influents and effluents of each WWTPs were sampled once a month (total three times per plant) between July and September, 2012, and analyzed for 22 hazardous water pollutants among 28 regulated for effluents limits in Korea. Concentrations of mercury, arsenic, 1,1-dichloroethylene, and benzene in the influents were relatively higher; concentrations of mercury and arsenic in effluents were relatively higher than those of other pollutants. Most of the hazardous chemicals and heavy metals were removed (including phase transfer) more than 60% through the treatment processes except for selenium (30% removal) and 1,4-dioxane (18% removal).

• Environmental Analysis Health and Toxicology
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• v.25 no.3
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• pp.207-214
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• 2010

Toxicity identification and quantification are important factors to evaluate the effect of industrial effluent on the aquatic environment. In order to measure the potential and real toxicity of mixed chemicals in the effluents, the biological method (i.e., WET test) should be used as well as chemical analysis method. In this study, we conducted WET test for various kinds of industrial effluents using aquatic organisms such as water flea (Daphnia magna), algae (Pseudokirchneriella subcapitata), fish (Oryzias latipes, Danio rerio), and microorganism (Vibrio fisheri). In addition, we carried out chemical analysis and TIE (Toxicity Identification Evaluation) for effluents in order to identify the substances causing toxicity. Among the 30 kinds of wastewater, S13 showed the highest eco-toxicity and $Ca^{2+}$ and $Cl^-$ ion were suspected as major compounds causing toxicity for aquatic organisms. In order to confirm these suspected compounds, various confirmation procedures need to be carried out.

• Journal of Industrial Technology
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• v.29 no.A
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• pp.55-60
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• 2009

Stabilization treatment is one of processes for wastes and their components to reduce their toxicity and migration rates to surroundings. Inorganic binders such as calcium hydroxide, blast furnace slag and red mud were tested for their potential applicability to in-situ stabilization of heavy metal contaminated tailings in the abandoned metal mines. Columns(150mm dia. ${\times}$ 450mm length) filled with mixtures of inorganic binders and tailing from the Geumjang mine with various mixing ratios of binders to tailings, 5%, 7% and 9% were applied artificial rainfall tests for 28 days. Effluents from columns filled with calcium hydroxide and tailing showed high pH's of ~12.5 and a increasing trend of concentration in Pb and Zn with a significant decrease in permeability in terms of elapsed days. Those with burning slag and tailing showed pH's of ~8.5 and significantly low concentrations in heavy metals with a stable permeability. In case of red mud, effluents showed significantly low concentrations in heavy metals but a decreased permeability with pH's of ~10.5. Conclusively, this basic study suggests burning furnace slag be a potential stabilizer for effective treatment of heavy metal contaminated mine tailings.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.11
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• pp.4649-4655
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• 2010

The aim of this study was to investigate the effect of flowing the industrial wastewater effluents into the K lake which is located in the A city on the eutrophication. The lake was modelled as a continuous stirred-tank reactor. Phosphorus and Chl-a concentration in the lake were calculated to $0.29\;/m^3$과 $4.0\;g/m^3$ at steady state, respectively. Those simulated concentrations were very close to the monitored mean concentration of the lake, indicating that the simulation could be used a tool for characterizing the lake. The non-steady state concentrations of the phosphorus and Chl-a were proposed as a function of time as well. Phosphorus loading ($L_p$) and depth to retention time ratio ($H/{\tau}w$) was calculated in order to analyze the current state of eutrophication. We proposed a strategy to change the lake from eutrophic to permissible oligotrophic state using a graph consisting of two variables, $L_p$ and $H/{\tau}w$.

• Journal of the Korean Society of Marine Environment & Safety
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• v.14 no.4
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• pp.267-273
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• 2008

The purpose of this study is to investigate the distributive property of organic pollutants in effluents of argo/industrial wastewater treatment plants in Jeonnam using simultaneous analysis method of 310 chemicals. The numerous organic pollutants were detected in four sampling sites and the major chemicals were pesticides, CH type chemicals such as polycyclic compounds, CHO type chemicals such as phthalates, and CHO(N) type chemical such as aromatic amines. Moreover, 17 kinds of endocrine disrupters which include diethylptbalate were detected in each sampling sites. TU (Toxic unit) indicated cytotoxicity of samples using XTT assay, it appeared highly at A point(27.2) and D point(24.4). Also, the results from the correlation between total concentration of pollutants and TU did not correspond to the results of chemical and biological analysis.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2006.05a
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• pp.333-337
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• 2006

Biosorption can be used to eliminate heavy metals from industrial effluents or to recover precious metals from processing solutions. Scanning Electron Microscopedetected a high Cr sorption capacity of L. Japonica biomass almost 45% of its dry weight at pH 4.5. It should be mentioned that adjusting the pH influences on sorption capacity of biomass.