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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 24, Issue 6 - Dec 2015
Volume 24, Issue 5 - Oct 2015
Volume 24, Issue 4 - Aug 2015
Volume 24, Issue 3 - Jun 2015
Volume 24, Issue 2 - Apr 2015
Volume 24, Issue 1 - Feb 2015
Selecting the target year
Separation of Copper & Cobalt by Solvent Extraction in Organic Acid Leaching Solution
Kim, Tae-Young ; Ryu, Seong-Hyung ; Ahn, Jae-Woo ;
Journal of the Korean Institute of Resources Recycling, volume 24, issue 3, 2015, Pages 3~10
DOI : 10.7844/kirr.2015.24.3.3
A study has been made on the recovery & separation of cobalt and copper from organic acid leaching solution by solvent extraction. The experimental parameters such as the equilibrium pH, concentration of extractant and phase ratio were observed. Copper was extracted using LIX 84 and Cobalt was extracted using cyanex 272 and versatic acid 10. Experimental results showed that extraction percent of copper was 99% at above eq. pH 2.0 and then more than 90% of cobalt were extracted by cyanex 272 in eq. pH 6.0 and versatic acid 10 in eq. pH 7.5. Stripping of copper and cobalt from the loaded organic phases can be accomplished by sulfuric acid as a stripping reagent and 120 ~ 150 g/L of
was effective for the stripping of copper and cobalt respectively. Finially, the basic optimal process for recovery of copper and cobalt from the bio-leaching solution was proposed.
Recovery of High Purity Sn by Multi-step Reduction of Sn-Containing Industrial Wastes
Lee, Sang-Ro ; Lee, Man-Seung ; Kim, Hyun You ;
Journal of the Korean Institute of Resources Recycling, volume 24, issue 3, 2015, Pages 11~15
DOI : 10.7844/kirr.2015.24.3.11
In order to develop a technology for the recovery of pure tin from the Sn containing industrial wastes (SIWs), a process consisted of high temperature reduction and electrorefining was investigated. The tin which exists as oxide in SIWs was successfully reduced by two consecutive high temperature treatments and 92.7% of the tin was recovered. The purity of the tin thus obtained was increased to 99.87% by electrorefining. By applying the results obtained in this work, a commercial process can be developed to produce pure tin metals from domestic spent resources, which can reduce the amount of tin imported from abroad.
Policy Options for Diaper Recycling to Foster Effective Citizens' Participation - Based on Collection Pilot Test of Soiled Diaper in Nowon-gu -
Kim, Kyung Shin ;
Journal of the Korean Institute of Resources Recycling, volume 24, issue 3, 2015, Pages 16~26
DOI : 10.7844/kirr.2015.24.3.16
This study aims to suggest possible policy options for collection of post-consumer diapers as a sustainable prerequisite to implementation of public recycling system with the desktop monitoring results and analysis of collection cost involved. By conducting a diaper collection pilot test on daycare centers and households in the Seoul Nowon-gu, this study revealed that the odor issues did not stand out as an important hindering factor and that the collection rate was the largest contributing factor regarding collection costs. The exploratory cost analysis result shows that the implemented recycling system must guarantee collection rate over 50% via twice-a-week collection frequency, to be comparable or even superior to the current food waste collection cost. Also the pilot demonstration test showed that the final collection rate can be achieved as much as over 50%. The promising data thus obtained cost economically viable future diaper recycling system implementation in the entire Seoul metropolis and adjacent areas of dense population. With the concomitant development of recycling technology and related infrastructure for systematic collection of diaper waste, it makes our society much more sustainable.
The Optimization of Hydrometallurgical Process for Recovery of Zinc from Electric Arc Furnace Dust (Part I : leaching process)
Moon, Dea-Hyun ; Ahn, Sang-Woo ; Kim, Han-lae ; Kim, Ji-Tae ; Chang, Soon-Woong ;
Journal of the Korean Institute of Resources Recycling, volume 24, issue 3, 2015, Pages 27~33
DOI : 10.7844/kirr.2015.24.3.27
EAFD (Electric Arc Furnace Dust) is considered as pernicious pollutant, assigned hazardous waste. Since this dust is a by-product of industry, it contains valuable metals such as Fe, Zn, Ni, Cu which can be turned into resources by recycling process. In this study, hydrometallurgical process was applied to recover Zn from Electric Arc Furnace Dusts. The result showed 95% Zn recovery at 3M
, Solids/Liquid ratio 1:2 and aeration of 1.8L/min for 2hr. However there was 80% Zn recovery at lower
concentration apply for pilot scale plant.
A Study on the Carbon Composite Briquette Iron Manufacturing Using Fe-containing Process Wastes
Yu, Jong Yeong ; Yang, Dae Young ; Shin, Hee Dong ; Sohn, Il ;
Journal of the Korean Institute of Resources Recycling, volume 24, issue 3, 2015, Pages 34~43
DOI : 10.7844/kirr.2015.24.3.34
Raw materials in steel industry decide on the productivity, quality and price competitiveness. Utilizing iron-containing by-products as raw materials for steel products can save the cost of cleaning up iron-containing by-products and solve environmental issues. Iron-containing by-products have a small particle size. If they are directly inserted in a steel making process, it cause a problem such as poor heat flow and scattering. To solve these problems and induce the additional reduction, study concern with iron ore-coal mixed briquette technique are conducted by many researchers. In this paper, method of making carbon composite briquette iron(CCBI) using iron-containing by-products was studied. The effect of composition of Fe-containing process wastes, reducing agent, flux and binder on formability of CCBI (carbon composite briquette iron) was measured.
Ammoniacal Leaching for Recovery of Valuable Metals from Spent Lithium-ion Battery Materials
Ku, Heesuk ; Jung, Yeojin ; Kang, Ga-hee ; Kim, Songlee ; Kim, Sookyung ; Yang, Donghyo ; Rhee, Kangin ; Sohn, Jeongsoo ; Kwon, Kyungjung ;
Journal of the Korean Institute of Resources Recycling, volume 24, issue 3, 2015, Pages 44~50
DOI : 10.7844/kirr.2015.24.3.44
Recycling technologies would be required in consideration of increasing demand in lithium ion batteries (LIBs). In this study, the leaching behavior of Ni, Co and Mn is investigated with ammoniacal medium for spent cathode active materials, which are separated from a commercial LIB pack in hybrid electric vehicles. The leaching behavior of each metal is analyzed in the presence of reducing agent and pH buffering agent. The existence of reducing agent is necessary to increase the leaching efficiency of Ni and Co. The leaching of Mn is insignificant even with the existence of reducing agent in contrast to Ni and Co. The most conspicuous difference between acid and ammoniacal leaching would be the selective leaching behavior between Ni/Co and Mn. The ammoniacal leaching can reduce the cost of basic reagent that makes the pH of leachate higher for the precipitation of leached metals in the acid leaching.
Recovery of Tin from Waste Tin Plating Solution by Ion Exchange Resin
Shin, Gi-Wung ; Kang, Yong-Ho ; Ahn, Jae-Woo ; Hyeon, Seung-Gyun ;
Journal of the Korean Institute of Resources Recycling, volume 24, issue 3, 2015, Pages 51~58
DOI : 10.7844/kirr.2015.24.3.51
In order to recover tin from the waste tin plating solution, we used the ion exchange method using three types of ion exchange resins. The ion exchange resin with tertiary functional group(Lewatit TP 272) has not adsorption ratio of tin. The ion exchange resin with iminodiacetic functional group(Lewatit TP 207) has high adsorption ratio of tin, but impurity content in the recovered tin solution was relatively high. Whereas, in case of the ion exchange resin with functional group of ethylhexyl-phosphate(Lewatit VP OC 1026), adsorption ratio of tin was less than that of Lewatit TP 207. However, it was possible to remove impurities in the recovered tin solution by controlling the pH of the solution. High purity tin solution can be recovered by removing the organic materials with water washing process.
Chemical Devulcanization for the Recycling of Rubber Powder of Waste Tires and Mechanical Properties
An, Ju-Young ; Park, Jong-Moon ; Bang, Daesuk ; Kim, Bong-seok ; Oh, Myung-Hoon ;
Journal of the Korean Institute of Resources Recycling, volume 24, issue 3, 2015, Pages 59~65
DOI : 10.7844/kirr.2015.24.3.59
Recycling of vulcanized rubber products is a serious problem in the world. A quantity of generated waste tires becomes much more and more because of increasing demands on automobiles, resulted in the cause of serious secondary pollution by sulfur component that is crosslinked to incineration or landfill. In addition, crosslinked surfur is used to interfere with the binding of the raw material rubber. In this study, we analyzed the degree of devulcanization by the chemical devulcanization. Devulcanization ratio of the samples were systematically analysed by variables such as time and temperature. In addition, the effect of swelling method as a pre-treatment process was also measured. A rubber specimen was deepened in a organic 2-buthanol solutions during various times of 1 ~ 5 hrs at 100, 150,
respectively, then to calculate the crosslink density and the number average molecular weight by using a parallel expansion process, which showed devulcanization degree of analyzed samples quantitatively. Also, the mechanical properties were measured with the samples prepared by using a hot press.
Comparsions for Flexural Performance of Amorphous Steel Fiber Reinforced Concrete
Kim, Byoung-Il ; Lee, Sea-Hyun ;
Journal of the Korean Institute of Resources Recycling, volume 24, issue 3, 2015, Pages 66~75
DOI : 10.7844/kirr.2015.24.3.66
The flexural performance of amorphous steel fibers having environmental and economy benefits due to relatively short manufacturing process were evaluated as well as that of hooked steel fibers by varing fiber length and volume fraction. Fiber lengths were 10 mm, 20 mm, 30 mm and fiber volume fractions were varied from 0.3% to 1.2%. Test results with flexural performance showed that mixing design needs to be careful because of relatively high volume of amorphous steel fiber compared to hooked steel fibers. High flexural strength was obtained from both longer fiber length and higher volume fraction. Residual strength and toughness of amorphous steel fiber were similar to that of hooked steel fiber, even though rapid dropping of applied load right after concrete matrix breaking. It can be judged that relatively high ability of energy dissipation around first cracking area relatively overcome rapid dropping of loading.
Characterization of Metal Composition in Spent Printed Circuit Boards of Mobile Phones
Jeong, jinki ; Lee, Jae-chun ; Choi, Jun-chul ;
Journal of the Korean Institute of Resources Recycling, volume 24, issue 3, 2015, Pages 76~80
DOI : 10.7844/kirr.2015.24.3.76
Mobile phone has become one of the essential items in our daily life. In Korea, it is estimated that more than 20 million cell phones are discarded each year due to advancement in technology, thus creating disposal and environmental pollution. In order to conserve the resources, their proper recycling is essential as it contains both valuable and toxic metals. The economics of the recycling will depend on the amount and value of the metals. Therefore, it is necessary to determine the composition of the metals present in the different cell phones. In the present study, a report is presented on the variation of metal content per year of waste mobile phones. A review has been made for the mobile phones manufactured during the period 2000-2009 and metal content of the printed circuit boards (PCBs) by analyzing their metals. An example of the precious metal palladium and of the heavy metal lead shows the decreasing trend.