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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 8, Issue 5 - Dec 1999
Volume 8, Issue 4 - Oct 1999
Volume 8, Issue 3 - Aug 1999
Volume 8, Issue 2 - Jun 1999
Volume 8, Issue 1 - Mar 1999
Selecting the target year
Removal of Heavy Metals from Wastewater Using Steelmaking Slag and Sludge
Journal of the Korean Institute of Resources Recycling, volume 8, issue 1, 1999, Pages 11~17
This study was carried out to investigate the efficiency of stcclmaldng slag and sludge in removing metals existing in wastewater or leachate. Laboratory experiments were performed as a function of initial concentration of metals. pH a and temperature of the background solution and the presence of che1ating agent, EDTA. The test conditions were temperatures r ranging from
; initial concentrations varying from 5mg/L to 50 mg/L; pH between 3 and 11; and Cu. Cd‘ and Pb a as adsorbates. The results of tests showed that overall rates of metals removal were 20~30% at pH 3 and greater than 90% at p pH 7 and 11. Metals were removed from the solution predominantly via adsorption in acidic conditions, and the combined e effects of adsorption and precipitation in neutral and alkaline conditions. In view of the test results and other engineering c characteristics of steelmaking slag and sludg
, these industrial by-products from steel industry have a high potential to be used l in wastewater treatment and are particularly beneficial when used as landfill liner additives due to thelJ ability to remove heavy m metals from leachate.
Characteristic of Leaching with Incineration Fly Ash of Industrial Solid Wastes
Journal of the Korean Institute of Resources Recycling, volume 8, issue 1, 1999, Pages 18~22
In order to utilize incineration fly ash of industrial wastes as resources, we present the recovery and separation of metals included in the fly ash by leaching with aqueous solution A great quantity of Cu, Pb, and Zn as well as a small amount oftoxic heavy metals are contained in the leach liquor of the fly ash, and the concentration of the ingredients of the fly ash depends on the industrial wastes which are fed into incinerators. In this paper, sequential Ieachiog operations are conducted using
and NaOH as Icachants. Water soluble copper salt was leached by
, Zn and Pb were separated by the NaOH leach liquor, and water insoluble copper was selectively leached as chelate ion with the
leach liquor of the third Ieaehant. Results show that the reduction percent of the fly ash in the leaching steps using
is 77%, and the other leaching procedures lose the weight of fly ash by above 60%.
Property Change of Heat-reservoir Refractory Brick With Varying Compositions and Sintering Conditions Utilizing Mill-scale and Red-firing Clay As Raw Materials
Journal of the Korean Institute of Resources Recycling, volume 8, issue 1, 1999, Pages 23~28
Firing characteristics, transverse rupture strength, and heat capacity were studied of the heat-reservoir refractory materials made of red-firing clay, mill scale, and water glass. The firing shrinkage increased with increase of the clay proportion in samples. The volume of fired bodies showed shrinkage by drying up to
, steady expansion in the 300-
range due to phase transition of iron oxides. and drastic expansion above
. Flexural strength decreased from 5.6 Mpa to 2.35 Mpa with the decrease of the ratio of clay to mill scale from 1:1 to 1:3 Heat capacities changed from 1.1 Joul/g
C to 1.35 Joul/g
C with the ratio of millscale to clay ratio from 1:1 to 1:3. Mill scale in the specimen appears to exist as liquid phase during firing. Firing the specimens in air leads to the eruption of the molten mill scale to the sample surfaces. Contrarily, firing samples in a refractory sagger with a cover suppressed the eruption of the molten mill scale to the surfaces. The addition of mill scale gave rise to porous sintered bodies which would delay cooling rates of heat-reservoir brick.
Influence of Blast Furnace Slag Addition on the Strength of Cold Bonded Pellet
Journal of the Korean Institute of Resources Recycling, volume 8, issue 1, 1999, Pages 29~36
Utilization of iron bearing dusts has been needed agglomeration prior to use as a burden in blast furnace The cold bonded pellet process using iron bearing dusts has been developed as an alternative to the conventional heat indurated pelletizing process. Partial substitution of cements with cheaper materials would decrease the production cost of pellet. This paper discusses the strength of pellet containing blast furnace slag as a bonding material in pelletizing a cold bonded agglomerates. Depending upon the quality, half of the cement required may be replaced by slag in the pellets with a strength of around 150 kgf. Some of the physicochemical properties of the bonding materials are also investigated in the present work.
Application of Adsorption Isotherms for Manganese Nodule-Cadmium Interaction
Journal of the Korean Institute of Resources Recycling, volume 8, issue 1, 1999, Pages 37~43
Studies have been conducted for the purpose of using manganese nodule and residue remained after extracting valuable metals [mm it as the adsorbent of cadmium wastewater. The study observed the adsorption percentage according to initial cadmium concentration and interpreted each adsorption systems by applying the Freundlich, Langmuir, and Temkin isotherms. The adsorption amounts increased as the initial concentration at cadmium ion increased, whereas the adsorption percentage decreased. Linearity was shown when applied to the Freundlich and Langmuir isotherms. The k value which evaluates the adsorption capacity of adsorbent in Freundlich isotherm, turned out to be 11.72, the highest in case of manganese nodule. The Xm value, the maximum adsorption amount of the adsorbate that adsorbs as a monolayer in Langmuir isotherm of manganese nodule, was estimated as 0.16, representing higher value compared with those of leached residue, leached residue-raw manganese nodule mixture, and activated carbon.
A Study on the Properties of Converter Slag Modified by Addition of Waste Foundry Sand
Journal of the Korean Institute of Resources Recycling, volume 8, issue 1, 1999, Pages 44~51
Converter slag was reduced and modified by the simultaneous addition of carbon and waste foundry sand as a
source. The basic properties such as phase distribution, composition, specific density, hardness. absorption of water and compressive strength of modified slags were measured. The Iron recovery was significantly affected by the basicity of slag. The properties of slow cooled-modified slags of basicity 1.34 arc very similar to the natural aggregates.