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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
Editor in Chief :
Volume & Issues
Volume 15, Issue 6 - Dec 2006
Volume 15, Issue 5 - Oct 2006
Volume 15, Issue 4 - Aug 2006
Volume 15, Issue 3 - Jun 2006
Volume 15, Issue 2 - Apr 2006
Volume 15, Issue 1 - Feb 2006
Selecting the target year
Investigations on the Adsorption Characteristics of
Gas on Fixed Bed Manganese Nodule Column
Baek, Mi-Hwa ; Kim, Dong-Su ; Jung, Sun-Hee ; Park, Kyoung-Ho ;
Journal of the Korean Institute of Resources Recycling, volume 15, issue 4, 2006, Pages 3~12
The feasibility for the employment of manganese nodule as an adsorbent for
gas has been investigated. The specific surface area of manganese nodule particle, which used in the experiments, was ca.
and the content of sulfur in manganese nodule was observed to significantly increase after
was adsorbed on it. The EPMA for the distilled water-washed and methanol-washed manganese nodule particle after
adsorption showed that its sulfur content was slightly decreased to 14.7% and 13.1% respectively, from 15.4% before washing. The XRD analysis of manganese nodule showed that todorokite and birnessite, which are manganese oxides, and quartz and anorthite were the major mineralogical components and weak
peaks were detected after
was adsorbed on manganese nodule. For an comparative investigation, limestone was also tested as an adsorbent for
, however, no peaks for
were found by XRD analysis after the adsorption of
. As the size of adsorbent increased, time for breakthrough was decreased and the adsorbed amount of
was also diminished. The
adsorption was hindered when its flow rate became high and the adsorption capacity of manganese nodule was observed to be superior to that of limestone. In addition, the mixture of manganese nodule and limestone did not show an increase in the adsorption of
. Finally, as the temperature was raised, the adsorbed amount of adsorbate on manganese nodule was found to be decreased.
Extraction characteristics of extraction resins containing HEH/EHP
Park, Kye-Sung ; Kim, Joon-Soo ;
Journal of the Korean Institute of Resources Recycling, volume 15, issue 4, 2006, Pages 13~18
This study was to investigate the extraction characteristics of extraction resins containing HEH/EHP for Gadolinium solution. The experiments were carried out with the variation of equilibrium pH and initial concentration of Gd. The optimum extraction time was 90 mins on Gd extraction using resin. The extraction ratio(%) was increased by increasing equilibrium pH from pH 1.0 to 2.0. The experimentally measured amounts of Gd on resins at equilibrium agreed well with those predicted using Freundlich's isotherm.
Preparation of Ag Nano-Powder from Aqueous Silver Nitrate Solution through Reduction with Hydrazine Hydrate
Lee, Hwa-Young ;
Journal of the Korean Institute of Resources Recycling, volume 15, issue 4, 2006, Pages 19~26
The preparation of Ag nano-powder from aqueous silver nitrate solution, which would be available for the recycling of silver bearing wastes, was investigated by a reductive precipitation reaction using hydrazine hydrate as a reducing agent. Silver solution was prepared by dissolving silver nitrate with distilled water, and then the dispersant, Tamol NN8906 or Tween 20, was also mixed to avoid the agglomeration of particles during the reductive reaction followed by the addition of hydrazine hydrate to prepare Ag nano-particles. Ag particles obtained from the reduction reaction from silver solution were characterized using the particle size analyzer and TEM to determine the particle size distribution and morphology. It was found that about 100% excess of hydrazine hydrate was required to reduce completely silver ions in the solution. Ag powders with very narrow distribution could be obtained when Tamol NN8906 was used as the dispersant. In case of Tween 20, the particle size distribution showed typically the bimodal or multimodal distribution and the morphology of Ag particles was found to be irregular shape in both cases.
Activation Property of Blast Furnace Slag by Calcined Alunite
Kim, Hyung-Seok ; Jo, Young-Do ; Ahn, Ji-Whan ; Kimura, Kunio ; Han, Choon ;
Journal of the Korean Institute of Resources Recycling, volume 15, issue 4, 2006, Pages 27~35
In order to use alunite as an activator of blast furnace slag, we studied the hydration characteristics of the calcined alunite and the ground blast furnace slag. The alunite calcined at
consists of KAl(
. The calcined alunite reacts with
and gypsum to form etrringite (
) as fellows:
ions from calcined alunite reacts with CaO in blast furnace slag to from gypsum, which reacts with CaO and
to from ettringite in calcined alunite-blast furnace slag system. Therefore blast furnace slag can be activated by calcined alunite.
A study for High Efficiency Dewatering of Sludge Contained Fine Particles
Lee, Jung-Eun ; Lee, Jae-Keun ;
Journal of the Korean Institute of Resources Recycling, volume 15, issue 4, 2006, Pages 36~43
There was some difficulty dewatering properties due to small porosity diameter of cake, when pigment sludge contained fine particle was formed by cake under the dewatering. It was difficult to dewater the sludge with fine particles with the conventional mechanical dewatering method. This study was to improve the dewatering rate as discharging the water from porosity of cake easily, supplying the low heat to the cake layer. Thermal dewatering equipment of piston type to keep up constant temperature on the cake was set up and relative experiment was conducted for sludge of 200 g with fine pigment particle. As test results. filtration of 176.8 g, cake weight of 19.4 g, cake thickness of 4.2 mm was measured, and it was analyzed that the water content of cake was 47 wt% and dewatering velocity, which moaned the residual d교 sloid amount per dewatering area, was
. This results showed that filtration increased, cake weight and thickness decreased and dewatering velocity increased against mechanical dewatering method. And water content of cake decreased about 30%, so the result which dewatering rate improved was drew generally. The reason is that the inner vapor pressure working at the cake porosity increased as applying the low heat to the cake layer, which lead to discharge the water from porosity easily. Therefore, this study was estimated by the useful technology for sludge reduction.
Carbothermic Reduction of Zinc Oxide with Iron Oxide
Kim, Byung-Su ; Park, Jin-Tae ; Kim, Dong-Sik ; Yoo, Jae-Min ; Lee, Jae-Chun ;
Journal of the Korean Institute of Resources Recycling, volume 15, issue 4, 2006, Pages 44~51
Most electric arc furnace dust (EAFD) treatment processes to recover zinc from EAFD employ carbon as a reducing agent for the zinc oxide in the EAFD. In the present work, the reduction reaction of zinc oxide with carbon in the present of iron oxide was kinetically studied. The experiments were carried out at temperatures between 1173 K and 1373 K under nitrogen atmosphere using a weight-loss technique. From the experimental results, it was concluded that adding the proper amount of iron oxide to the reactant accelerates the reaction rate of zinc oxide with carbon. This is because iron oxide in the reduction reaction of zinc oxide with carbon promotes the carbon gasification reaction. The spherical shrinking core model for a surface chemical reaction control was found to be useful in describing kinetics of the reaction over the entire temperature range. The reaction has an activation energy of 53 kcal/mol (224 kJ/mol) for ZnO-C reaction system, an activation energy of 42 kcal/mol (175 kJ/mol) for
reaction system, and an activation energy of 44 kcal/mol (184 kJ/mol) for ZnO-mill scale-C reaction system.
Strength and Durability Properties of Concretes Using Ground Granulated Blast-Furnace Slag According to Steam Curing Types
Hong, Chang-Woo ; Jang, Ho-Sung ; Jeong, Won-Kyong ;
Journal of the Korean Institute of Resources Recycling, volume 15, issue 4, 2006, Pages 52~59
The purpose of this study was to evaluate the effects of ground granulated blast-furnace slag on strength development and durability of ordinary portland cement concrete (OPC) with steam curing types. Main experimental variables were slag contents(0%, 10%, 30%, 50%, 70%) and curing types (standard, accelerated curing). It were performed to check the basic properties of concretes that compressive strength, rapid chloride ion permeability and chemical resistance. From the result, we have found that increasing the amount of blast-furnace slag produced concrete with increased compressive strength and permeability resistance. Rapid freezing-thawing test showed that they were good enough to protect the concrete structures and to carry out cyclic freezing and thawing. The freeze-thaw resistance of blast-furnace slag produced concretes maintained above 90% of relative dynamic modulus after 300 freezing-thawing cycles. Increasing the amount of blast-furnace slag produced concretes with increased chemical resistance.
Preparation of Alum for Water Treatment Product Using Waste Aluminum Dross
Park, Hyung-Kyu ; Choi, Young-Yoon ; Eom, Hyung-Choon ; Bae, Dong-Su ;
Journal of the Korean Institute of Resources Recycling, volume 15, issue 4, 2006, Pages 60~63
Waste aluminum dross was leached with sulfuric acid to prepare alum used for water treatment product. The remained metallic aluminum in the waste aluminum dross was extracted into the solution to make aluminum sulfate solution. The solution could be used as alum for water treatment product after adjusting the required alumina concentration and the basicity. Comparing to the conventional method for alum using aluminum hydroxide, material cost could be saved in this method. Also, there is an additional merit in view of recycling of the waste aluminum dross by reducing the amount of waste dross to be landfilled.