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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
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 14, Issue 6 - Dec 2005
Volume 14, Issue 5 - Oct 2005
Volume 14, Issue 4 - Aug 2005
Volume 14, Issue 3 - Jun 2005
Volume 14, Issue 2 - Apr 2005
Volume 14, Issue 1 - Feb 2005
Selecting the target year
Utilization of a Coal-preparation Refuse as a Raw Material for Clay Brick
Hyun Jong-Yeong ; Jeong Soo-Bok ; Chae Young-Bae ;
Journal of the Korean Institute of Resources Recycling, volume 14, issue 4, 2005, Pages 3~9
In this study, the utilization possibility of coal-preparation refuse emitted from Hwasun coal mine in Korea as a raw material for ceramic body was investigated. The firing shrinkage ratio of ceramic specimen made from the coal-preparation refuse was reduced with increasing the addition amounts of that, while the compressive strength was slightly decreased. The weight of ceramic body was also reduced because carbon contained in the coal-preparation refuse was burn by fring. The water adsorption ratio of the ceramic specimen was under 10 wt%, and the compressive strength of that was over 21 MPa at over
for 2 hr. Therefore, it was possible to make the 1st garde clay brick of KS L 4201 from the coal-preparation refuse.
Application of Aggregate Recycled in-situ for Anti-frost Layer and Lean Concrete Base Course
Kim Jin-cheol ; Shim Jae-won ; Cho Kyou-sung ;
Journal of the Korean Institute of Resources Recycling, volume 14, issue 4, 2005, Pages 10~16
In order to recycle the waste concrete from which the reproductive aggregate should be produced in-situ, the applicability of crushers and recycled aggregates, and the compliance with the specification have been evaluated comprehensively. As a result of them, the properties of recycled aggregate particles were inferior to the natural one because of the adherent mortars on the recycled one, and the mobile impact crusher and the eccentric-mounted cone and jaw were superior to the others for the graded aggregates. In the case of anti-frost layer, the recycled one was easily controlled since the dry densities, contrary to natural one, were not largely changed with the moisture contents. It was found that the lean concrete base course is not influenced by absorption as cement dust grows larger, and the 7-day compressive strengths of lean concrete were higher than 10 MPa regardless of the crushing type.
Treatment of Metal Wastes with Manganese Nodules
Park Kyung-Ho ; Nam Chul-Woo ; Kim Hong-In ; Park Jin-Tae ;
Journal of the Korean Institute of Resources Recycling, volume 14, issue 4, 2005, Pages 17~21
Deep-sea Manganese nodules was treated with reduction-smelting process with adding the spent Ni-Cd battery or the cobalt contained spent catalyst for recovery of nickel and cobalt metals. The nickel in the spent Ni-Cd battery could be recovered by adding
coke as a reducing agent regardless of the amount of battery added. However, to recover cobalt from the spent catalyst, it is require to add more coke for reduction of cobalt oxide in the catalyst. The treatment of metal wastes with manganese nodules can contribute to lower the cost for the processing of nodules and to facilitate the recycling of metal wastes.
Development of self-sealing waterproof materials using GRT powder
Lee Dong-Min ; Choi Joong-So ;
Journal of the Korean Institute of Resources Recycling, volume 14, issue 4, 2005, Pages 22~33
Four sheet-shaped and one soft-shaped self-sealing waterproof materials were prepared to recycle some GRT(Ground Rubber Tires). Their physical properties were tested to consider characteristics of them. The self-sealing waterproof materials were consisted of GRT/super absorbent polymer(SAP)/binder and mold by a hot press after mixing with a batch-typed internal mixer. The average size of GRT particles was -40 mesh, SAPs were commercial GE-500F and poly(AM-SAS-AA) prepared in this work. Binders were PU. EVA, LDPE, SBR, and poly(2-EHA). And PU film was attached to improve the properties of waterproof materials. Characteristics of self-sealing waterproof materials consisted of by GRT/GE-500F/EV-600/PU film and GRT/GE-500F/SBR(vulcanization)/PU film among the developed self-sealing waterproof materials were similar to the commercial products. And properties of the soft-shaped self-sealing waterproof materials consisted of by GRT/GE-500F/Po1y(2-EHA) and CRT/Poly(AM-SAS-AA)/poly(2-EHA) were improved within from four times to twenty times compared to the one oi the commercial products.
A Study on Reusing of Electroless Co-Cu-P Waste Solution
Bai Young-Han ; Oh Lee-Sik ;
Journal of the Korean Institute of Resources Recycling, volume 14, issue 4, 2005, Pages 34~40
Reusing of electroless Co-Cu-P waste solution was investigated in the respect of plating time, plating rate, solution composition and deposit. Plating time of cobalt-catalytic surface took longer than that of zincated-catalytic surface. It was possible to reuse the waste solution by mixing
fresh solution at batch type. Plating time of initial solution at continuous type took longer 7.5 times over than that of batch type. Plating time of
waste solution additive at continuous type took longer 2.5 times over than that of batch type. Component change of cobalt-topper for electroless deposition was greatly affected by deposit inferiority and rapid decrease in plating rate.
Test Run of the Pilot Plant for Recycling of the Waste Aluminum Dross
Park, Hyung-Kyu ; Lee, Hoo-In ; Choi, Young-Yoon ;
Journal of the Korean Institute of Resources Recycling, volume 14, issue 4, 2005, Pages 41~46
Waste aluminum dross is a major waste in the aluminum scrap smelters and its major components are alumina and metallic aluminum. In this study, waste aluminum dross was leached with sodium hydroxide solution to extract the remained aluminum into the solution, and aluminum hydroxide was recovered from the leached solution. The dross residue generated at the leaching step was recycled into alumina base ceramic materials through a series of treatments such as washing, drying and roasting. Also, a pilot plant was constructed and tested to demonstrate the developed technology. Four tons of waste aluminum dross could be processed per day. From the test run of the pilot plant, it was confirmed that the developed technology could be applied to commercialization.
Working partial pressure of
gas in aqueous solution
Kim Dong-Su ;
Journal of the Korean Institute of Resources Recycling, volume 14, issue 4, 2005, Pages 47~52
Carbonate species in aqueous solution play an important role in the determination of chemical properties of water in relation with alkalinity, buffer capacity, biological productivity, and so on. These compounds also have reactive characteristics such as interphasal reactions between solid, liquid, and gas phases. In the absence of solid materials, the total amount and relative abundance of each carbonate species are directly influenced by the partial pressure of
gas in the atmosphere, which in turn significantly affects the properties of aquatic system. In the water/wastewater treatment process along with the wastes treatment and recycling process which occurring in aquatic environment, it is essential to figure out its characteristics for their optimization and one of its most influential features upon these processes is determined by carbonate species. To understand the fundamental aspect of the relationship between the partial pressure of
gas and chemical features of water, especially pH, the working partial pressure of pure
gas that produced by contacting the dry ice with water has been estimated based on equilibrium calculation. The equilibrium constants for the dissociation ot carbonic acid were determined using van't Hoff equation and the distribution diagram of carbonate species according to the pH has been constructed to substantiate the results of equilibrium calculation. The estimated working partial pressure of pure
gas was found to be a function of the concentration of carbonates in solution, which suggesting that Prior evaluation of the working partial pressure of gas is essential for a better understanding of aquatic interactions.