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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Institute of Resources Recycling
Journal Basic Information
Journal DOI :
The Korean Institute of Resources Recycling
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Volume & Issues
Volume 18, Issue 6 - Dec 2009
Volume 18, Issue 5 - Oct 2009
Volume 18, Issue 4 - Aug 2009
Volume 18, Issue 3 - Jun 2009
Volume 18, Issue 2 - Apr 2009
Volume 18, Issue 1 - Feb 2009
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Liquid-Liquid Extraction General Principles - A Review
Lee, Jin-Young ; Kumar, Jyothi Rajesh ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 6, 2009, Pages 3~9
The present review paper deals the liquid-liquid extraction (LLE) general principles and the basic fundamentals, general process of LLE followed by the importance of LLE reagents. LLE is a process of transferring a chemical compound from one liquid phase to a second liquid phase, immiscible with the first. In analytical chemistry, this method enjoys a favored position among separation techniques because of its simplicity, speed and wide scope. By utilizing apparatus no more complicated than a separatory funnel and requiring several minutes at most to perform, extraction procedures offer much to the analytical chemist.
Degradation of Organic Component in MSW by Super-heated Steam
Kim, Woo-Hyun ; Roh, Seon-Ah ; Min, Tai-Jin ; Sung, Hyun-Je ; Park, Seong-Bum ; Jang, Ha-Na ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 6, 2009, Pages 10~17
Degradation of the organic component in the waste were carried out by superheated steam in a pressurized vessel. The effects of waste characteristics, reaction temperature and residence time on the degradation rate have been determined. The biodegradable organic components such as food and paper waste have been degraded, and plastics, wood and metal were remained without degradation. The degradation efficiency is decided by the desizing rate of the waste, and the waste mixture with 23% biodegradable organic component shows higher desizing rate than that of the 43% of the biodegradable organic component in a short residence time and the desizing rate is found to be 90% in the maximum condition.
A Study on the Synthesis of Aluminum Citrate from Aluminum Chloride Solutions
Lee, Hwa-Young ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 6, 2009, Pages 18~23
An investigation on the synthesis of aluminum citrate, one of the aluminum organic compounds, has been performed using aluminum chloride solutions as a starting material. For the synthesis of aluminum citrate, citric acid was added to aluminum solutions with the mole ratio of citric acid to aluminum to be 2.5 and aluminum citrate synthesized was also characterized in terms of chemical analysis, X-ray diffraction, particle size measurement and SEM analysis. As a result, it was found that the ratio of ethanol/Al solution more than 4.0 was required for the synthesis of aluminum citrate from aluminum solutions. Furthermore, the pH should be controlled to be more than 7.0 in order to obtain the recovery of aluminum citrate higher than 97%. From the chemical analysis of aluminum citrate synthesized in this work, the content of
, Al and C was found to be 17.0, 4.01 and 25.7%, respectively. Accordingly, the aluminum citrate synthesized from aluminum solutions was confirmed to be
Preparation of Nano Size Cerium Oxide from Cerium Carbonate
Kim, Sung-Don ; Kim, Chul-Joo ; Yoon, Ho-Sung ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 6, 2009, Pages 24~29
Since cerium carbonate becomes porous cerium oxide by releasing carbon dioxide and vapour steam during calcination of cerium carbonate, nano size cerium oxide can be obtained by milling calcined cerium carbonate. Therefore cerium carbonate [
] is used generally for the preparation of nano size cerium oxide. In order to obtain nano size cerium oxide from cerium carbonate prepared by reactive crystallization of cerium chloride solution and ammonium bicarnonate solution, the effects of experimental variables in the milling and calcination of cerium carbonate, such as calcination temperature, milling time, rpm of planetary mill, amount of dispersant and ball size for milling on the size of cerium oxide was investigated in this study. Cerium oxide prepared with the conditions of calcination temperature of
, milling time of 5 hour was 160nm mean particle size.
Characterization of Silica Sol Particle Prepared by Sol-Gel Reaction from Sodium Silicate Solution
Kim, Chul-Joo ; Kim, Sung-Don ; Jang, Hee-Dong ; Yoon, Ho-Sung ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 6, 2009, Pages 30~37
Silica sol was prepared from the mixture of sodium silicate solution and oxidized silicate solution in which sodium had been removed by sol-gel process. The properties of sodium silicate solution and silicate solution thus prepared were characterized by yellow silicomolydate method. Moreover, the formation and growth of silica sol from sodium silicate solution was investigated. Sodium silicate solution with 2% of
contains 95% of reactive silicate, and 50% of reactive silicate participates sol-gel reaction. From the results of FT-IR analysis, it was found that the intensity of silanol bond decreased and the intensity of siloxane bond increased with increasing reaction temperature. Zeta potential of silica sol prepared at each condition was -40~-60 mV and it could be known that silica sol in this study was well dispersed. The silica sol with 5~10 nm size could be prepared by heating the mixed solution of sodium silicate and silicate solution. And the silica sol grew into about 20 nm as silicate solution was added to silica sol solution.
Dissolution Characteristics of Magnesite Ore in Hydrochloric Acid Solution and Removal of Impurity
Eom, Hyoung-Choon ; Park, Hyung-Kyu ; Kim, Chul-Joo ; Kim, Sung-Don ; Yoon, Ho-Sung ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 6, 2009, Pages 38~45
Dissolution characteristics of magnesite ore in hydrochloric acid solution and removal of impurity were investigated. The dissolution yield increased with increasing temperature and with decreasing particle size. The optimum conditions for dissolution were found to be reaction period of 120 min, reaction temperature of
and mean particle size of 100. Under optimal dissolution condition the extraction of Mg was 98%. It was found that most of Si and Al exist in the residue, and they can be removed by filtering. Dissolved impurity ions were precipitated as metal hydroxides by pH adjustment. Polymers were used as coagulants for metal hydroxides and the suitable coagulant dosage was 1mg/100ml of non-ionic polymer.
A Study on the Concrete Compressive Strength Characteristics mixing Stone Dust Produced by Stone Block Manufacturing
Chae, Young-Suk ; Min, In-Ki ; Song, Gab-Young ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 6, 2009, Pages 46~53
The stone dusts produced during the manufacturing process of stone blocks are considered as one of industrial waste materials. This stone dusts are managed to either burying under the ground or stacking in the yard, but this disposal process is required an extra costs. The stone dust disposal like burying or stacking also cause environmental pollution such as ground pollution and subterranean water pollution. Thus, this study was conducted to explore the possibility of recycling stone dusts as a concrete mixing material in order to extend recycling methods. Based on the experiment results on various ratios of cement to stone dust content, the compressive strengths of concrete were recorded in the range of
. The results did not show any decrease in compressive strength due to the stone dust content. It can be concluded that the stone dusts produced by stone block manufacturing can be sufficiently recycled as one of concrete mixing materials in the aspect of compressive strength.
A Study on the Characteristics of Waste Fuel Manufactured from Industrial Combustible Waste Generated in Youngnam Area
Kang, Min-Su ; Kim, Yang-Do ; Ryu, Young-Bok ; Lee, Gang-Woo ; Lee, Man-Sig ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 6, 2009, Pages 54~59
The level manufacturing technique for refuse derived fuel (RDF) is possible to produce them itself by a domestic process which is appropriate in Korea. However, very few facilities were used for industrial combustible waste. The objective of this research is to develop the technique for refuse plastic fuel (RPF) of industrial waste. RPFs were prepared by mixing of plastic, paper and wood based on amount of regional waste. The physical properties of the RPFs prepared were investigated. RPFs prepared at mixing ratio(plastic : paper : wood) of 87.55% : 8.15% : 4.3% show the highest lower heating values in wet-base (LHVW) and the LHVW decreases as the mixing ratio of paper and wood increases.