• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.11a
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• pp.378-379
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• 2003

도로에서의 비산먼지는 건설현장 트럭에 의한 토사의 유입, 운반 중에 날리는 토사, 토양의 침식, 겨울철 모래살포, 타이어의 마모등에 의하여 도로표면에 쌓인 먼지가 차량의 운행이나 바람으로 인하여 발생한다 국내 주요도시 및 산업단지는 대부분이 포장도로로서 주변환경에서 유입되는 먼지와 함께 차량의 운행으로 인한 비산먼지(Fugitive dust)의 영향이 지대하며, 건설현장에서 발생되는 비산먼지와 함께 도시ㆍ산단지역의 미세먼지 배출량에 큰 기여를 하는 것으로 조사되었다. (중략)

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2017.10a
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• pp.44-44
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• 2017

• Proceedings of the Korean Ceranic Society Conference
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• 2000.04a
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• pp.83.2-83.2
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• 2000

• Cement Symposium
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• s.40
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• pp.55-63
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• 2013

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2004.11a
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• pp.121-126
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• 2004

• Journal of the Korean Chemical Society
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• v.56 no.6
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• pp.700-705
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• 2012

The present study is to explore the possibility of utilizing loess and fly ash as well as activated carbon for the adsorptive removal of T-N and T-P in water. Here, we investigated adsorption efficiency and Freundlich constants k and 1/n of each adsorbent. It was found that fly ash has not adsorptive capability for both T-N and T-P in water. Adsorption of T-N from water by loess has not occurred, but showed that adsorption efficiency for T-P reached approximately 57.5% at equilibrium time of 24 hr and room temperature. Activated carbon was shown to be an effective adsorbent for adsorption of T-N from water. Freundlich constant 1/n value of activated carbon represented that adsorptive capability of activated carbon is almost equivalent to loess.

• Analytical Science and Technology
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• v.17 no.2
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• pp.153-162
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• 2004

Dioxin CRM for QA/QC was prepared with fly ash collected from municipal waste incinerator. With that CRM inter-laboratory test was carried out. The collected fly ash was conducted several homogeneity steps including sievings and mixing. Homogeneity test and estimation of uncertainty was performed by one-way ANOVA based on ISO guide 35. Compared concentrations of fly ash of participants to CRM values, PCDDs value was lower than that of CRM in almost participants, and showed higher PCDFs concentration than that of CRM. Although there is a small difference in PCDD/Fs concentrations with congeners of extract, the result was close to mean value.

• Resources Recycling
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• v.19 no.5
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• pp.68-74
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• 2010

The aim of this study is to investigate the behaviors of synthesis of Calcium Chloroaluminte($11CaO{\cdot}7Al_2O_3{\cdot}CaCl_2$) under the melting temperature of municipal solid waste incineration fly ash(MSWI fly ash); $900^{\circ}C-1300^{\circ}C$ of sintering temperature. A sludge generated from a water purification plant (SW) was also used to fill up $Al_2O_3$ source, which might be deficient in MSWI fly ash. MF and SW were mixed at mixing ratio of 10 to 7, which is the mole ratio of CaO to $Al_2O_3$ of calcium Chloroaluminte. Mixed samples were sintered in the opened sintering reactor and the closed sintering reactor, respectively. The results showed that calcium chloroaluminte was formed at $1,000^{\circ}C$ in both reactors, but the temperature of decomposition of calcium chloroaluminte depended upon sintering reactor type; an opened sintering reactor and a closed sintering reactor, owing to the vaporization velocity of Cl.

• Resources Recycling
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• v.16 no.2 s.76
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• pp.32-39
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• 2007

The measurement of physicochemical properties of ASR incineration ash has been carried dot and the preparation of light-weight material has also been performed using ASR ash for recycling point of view as building or construction materials. For this aim, chemical composition, particle size distribution, and heavy metal leachability were examined for 2 bottom ashes and 4 fly ashes obtained from the domestic ASR incinerator. In the present work, attempt has been made to prepare the lightweight material using boiler ash as a raw material, which is prepared by forming the mixture of boiler ash, lightweisht filler and inorganic binder and followed by calcination at elevated temperature. As a result, the content of Cu in bottom ash was as high as about 3wt% so that the recovery of Cu from ash was required. The major compound of SDR #5 and Bag filter #6 was found to be $CaCl_2{\cdot}Ca(OH)_2{\cdot}H_2O\;and\;CaCl_2{\cdot}4H_2O$, respectively. It is thought that heavy metal teachability of lightweight material prepared with boiler ash was significantly decreased due to the encapsulation or stabilization of heavy metal compounds.

• Journal of the Korean Society for Railway
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• v.15 no.2
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• pp.109-115
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• 2012

In order to evaluate the effect of structural degradation of a GFRP composite bogie frame due to ballast-flying phenomena, the impact test and residual compression test after impact was conducted for glass fiber/epoxy 4-harness satin woven laminate composites applied to skin part of a bogie frame. The impact test was performed using a instrumented impact testing system with energy levels of 5J, 10J, and 20J, and the impactor was designed to have various ballast shapes such as sphere, cube, and cone to consider the ballasted track environments. The residual compression strength was tested to evaluate the degradation of mechanical properties of impact-damaged laminate composites. The results showed that the damage area and the degradation of residual compressive strength after impact for laminate composites was increased with increase of impact energy for all ballast shapes, and was particularly most influenced by ballast shape of cone.