Go to the main menu
Skip to content
Go to bottom
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 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
Selecting the target year
Current Status of Global ELV Recycling Regulation
Yoo, Tae-Wook ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 5, 2009, Pages 3~11
Recently efficient recycling of natural resource has been raised many people's interest with global warming issue. This study is focused mainly on main content of automobile recycling regulation and current situation of each nations including EU which is firstly acted. Also we were considering for adequate way to make better resource recycling condition and reduce Environment burden.
Oxygen Reduction Reaction Evaluation of Synthesized 20% Pt/C with Beat Treatment by Chemical Reduction Method
Kim, Jin-Hwan ; Kang, Suk-Min ; Thube, Dilip.R. ; Ryu, Ho-Jin ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 5, 2009, Pages 12~18
The 20% Pt/C catalysts were synthesized using the chemical reduction method for polymer electrolyte fuel cell cathode and were heat-treated in the temperature range from 300 to
. The oxygen reduction reaction of the catalysts was evaluated using the electrochemical measurement. The oxygen reduction reaction of the heat-treated Pt/C at
had high catalytic activity and the oxygen reduction reaction current of that was 2 times than that of non-heat treatment catalyst. It is considered that the change of the crystallinity and particle size by heat treatment could increase the catalytic activity.
Characterization of the Oxidation Roasting of Low Grade Molybdenite Concentrate
Kim, Byung-Su ; Lee, Hoo-In ; Choi, Young-Yoon ; Kim, Sang-Bae ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 5, 2009, Pages 19~25
Molybdenite concentrate (
) is the major mineral for the molybdenum industry, of which the industrial processing is first converted to technical grade molybdenum trioxide (
) by its oxidative roasting and purification, used as a raw material for manufacturing several molybdenum compounds. In the present work, detailed experimental results for the oxidative roasting of low grade Mongolian molybdenite concentrate are presented. The experiments were carried out in the temperature range of 793 to 823 K under an oxygen partial pressure range of 0.08 atm to 0.21 atm by using a thermogravimetric analysis technique. The molybdenite concentrate was an average particle size of
. In the oxidative roasting of low grade Mongolian molybdenite concentrate, more than 95% of molybdenite was converted to molybdenum trioxide in 60 min. at 828 K. The lander equation was found to be useful in describing the rates of the oxidative roasting and the reaction order with respect to oxygen concentration in a gaseous mixture with nitrogen was 0.11 order.
Removal of impurities from the rutenium containing scraps by nitric acid leaching
Ahn, Jae-Woo ; Chung, Dong-Wha ; Seo, Jae-Seong ; Lee, Ki-Woong ; Yi, Kang-Myung ; Lee, Jae-Hoon ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 5, 2009, Pages 26~36
A recovery process of Ruthenium from waste electronic scrap has been investigated by means of nitric acid leaching as a part of development for scrap pretreatment process to obtaining an optimum conditions for removal of removing various impurities such as Pb, Bi, Zn, Al, Bi, Ag Fe, Co, Zr, Si. From the experiments, 90% of Pb leached with 250 g/l pulp density in 10-15% nitric acid. Leaching behavior of Ba was also similar to that of the Pb, but those of other metal impurities, such as Zn, Al, Bi, Ag, Fe, Co, Zr, showed different behavior, in which the dissolution rate increased as the concentration of nitric acid in solution is increased up to the 10%
in solution and then it was constant above 10%
concentrations. Meanwhile, the dissolution of Ru in
solution was less then 100ppm, and that the total content of Ru in undissolved residue scrap was resulted in an increment of 50%.
Leaching behavior of rhenium and molybdenum from molybdenite roasting dust in NaOH solutions
Kim, Young-Uk ; Kang, Jin-Gu ; Sohn, Jeong-Soo ; Cho, Bong-Gyu ; Shin, Shun-Myung ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 5, 2009, Pages 37~43
The demand for rhenium has considerably increased recently owing to the large-scale consumption in industries and the price of rhenium has increased owing to the lack of supply and its availability. The dust from the roasting of molybdenite was employed to investigate the leaching behavior of rhenium and molybdenum. Leaching experiments were done by varying optimum parameters, such as reaction time, NaOH concentration and leaching temperature. The optimum leaching condition was found to be
NaOH, 2 hours leaching time,
temperature, and 250 rpm. At this condition, leaching percentage of rhenium and molybdenum was 86.1% and 88.6%, respectively.
Nitric acid leaching of electronic scraps and the removal of free nitric acid from the leaching solution for the recovery of copper and tin.
Ahn, Jae-Woo ; Seo, Jae-Seong ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 5, 2009, Pages 44~51
Fundamental study has been made on the recovery of copper from the electronic scrap by hydrometallurgical process. Nitric acid was used as a leaching agent to dissolve the metals such as Cu, Sn, Pb, Fe etc. from the crushed electronic scraps. TBP was employed to extract nitric acid from the strong nitric acid leaching solutions and to reclaim nitric acid. From the experimental results, Cu was effectively leached by 3.0-4.0 M nitric acid. And 95% of nitric acid in the leaching solution was extracted by 60% TBP, and 98% of nitric acid was stripped from the loaded organic phase by distilled water and it was possible to reuse as a leaching agent.
Effects of Acid Concentration and the Addition of Copper/Boron Salts on the Efficacy of Okara-based Wood Preservatives
Jeong, Han-Seob ; Kim, Ho-Yong ; Ahn, Sye-Hee ; Choi, In-Gyu ; Oh, Sei-Chang ; Han, Gyu-Seong ; Yang, In ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 5, 2009, Pages 52~62
This research was carried out to formulate environmentally friendly wood preservatives with okara and to investigate the effects of the acid concentration used for the hydrolysis of okara and salt type on the decay resistance of the preservatives. Okara-based preservatives were formulated with okara hydrolyzates, which were prepared with 0, 1%, and 2% sulfuric acid at
for 1 hr, and salts such as copper chloride and/or sodium borate. The preservatives were treated into wood blocks by vacuum-pressure method, and then the treated wood blocks were leached in
hot water for 72 hrs. The fungal treatments of the leached wood blocks were conducted by brown-rot fungus, Tyromyces palustris, and white-rot fungus, Trametes versicolor, to examine the decay resistance of the preservatives. As the acid concentration used for hydrolysis of okara increased, the treat-ability and decay resistance of the preservatives were improved, which the leachability was decreased. Wood blocks treated with the okara/copper or okara/copper/borax, showed very good decay resistance against T. palustris and T. versicolor. However, wood blocks treated with the okara/borax and okara-free preservative solutions, were observed the fungal decay by T. palustris. The optimal conditions for the preparation of okara-based wood preservatives were formulated with okara hydrolyzed with 1% sulfuric acid, copper chloride and borax.
Development of Bag Rupturing Device with Octagonal Rotating Blade Drums for MSWs
Lee, Byung-Sun ; Na, Kyung-Duk ; Han, Sang-Kuk ; Choi, Woo-Zin ; Park, Eun-Kyu ; Kim, Dong-Ho ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 5, 2009, Pages 63~71
Recyclable wastes coming into material recovery facilities(MRFs) is mostly packed by plastic bag or sack bag. Bag rupturing device is essential to improve capacity and efficiency of MRFs. Bag opening works of MRFs is mostly done by numerous workers and shredder-type bag rupturing device. It often makes a problems; decreased capacity, shredded recyclables, worker safety by explosion and broken glasses, etc. In the present work, bag rupturing device with octagonal rotating blade drums has been developed to solve the existing problems and environment assessment is also performed during operation of the device. Capacity of the device was about 5.6 ton/hr at 8.2 rpm of drum revolution speed and 1.25 m/min of belt conveyor speed. It satisfied initial designed capacity(5.0 ton/hr) and max. capacity 8.8 ton/hr was achieved at 12.5 rpm of drum revolution speed and 1.50m/min of belt conveyor speed. Bag rupturing efficiencies on outer and inner bag were obtained at 100% and about 95.6% as average, respectively and original form of glass bottles in the bag was maintained without broken by about 96.5%. This result shows that the safety in hand sorting by the workers could be improved. As result of environmental assessment on the noise, vibration and particulates, the measured levels on noise, vibration and particulates show the below standard regulatory limits. It could be concluded that the problems of existing devices in MRFs could be solved by adopting the bag rupturing device with octagonal rotating blade drums in on-site operation.
Trend on the Metallurgical Technologies for the Platinum Group Metal by the Patent Analysis
Shin, Shun-Myung ; Park, Jin-Tae ; Lee, Jae-Chun ; Son, Jeong-Soo ; Yoon, Ho-Sung ; Kim, Min-Seuk ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 5, 2009, Pages 72~81
The demand for platinum group metals for various advanced industries has been growing due to their excellent physical and chemical properties. Since the deposit of platinum minerals are restricted to few countries, their recovery from various secondary resources has becomes an important issue to related industries for keeping the supply reliably. In this paper, patents on the metallurgical technologies for the platinum group metals were analyzed. The search of patent was limited to the open patents of USA (US), European Union (EP), Japan (IP), and Korea (KR) from 1986 to 2006. Patents were surveyed using key-words searching and selected by filtering criteria. The trend of patents was analyzed by the years, countries, companies, and technologies.