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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Economic and Environmental Geology
Journal Basic Information
Journal DOI :
The Korean Society of Economic and Environmental Geology
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Volume & Issues
Volume 38, Issue 6 - Dec 2005
Volume 38, Issue 5 - Dec 2005
Volume 38, Issue 4 - Aug 2005
Volume 38, Issue 3 - Jun 2005
Volume 38, Issue 2 - Apr 2005
Volume 38, Issue 1 - Feb 2005
Selecting the target year
Mechanisms of Immobilization and Leaching Characteristics of Arsenic in the Waste Rocks and Tailings of the Abandoned Mine Areas
Kang Min-Mu ; Lee Pyeong-Koo ;
Economic and Environmental Geology, volume 38, issue 5, 2005, Pages 499~512
EPMA determined that Fe(Mn)-(oxy)hydroxides and well-crystallized Fe-(oxy)hydroxides and could contain a small amount of As
. Amorphous crystalline Fe-(oxy) hydroxide assemblages were identified as the richest in As with
. On the ternary
diagram, these materials were interpreted here as 'scorodite-like'. Dissolved As was attenuated by the adsorption on Fe-(oxy) hydroxides and Fe(Mn)-(oxy) hydroxides and/or the formation of an amorphous Fe-As phase (maybe scorodite:
). Leaching tests were performed in order to find out leaching characteristics of As and Fe under acidic conditions. At the initial pHs 3 and 5, As contents dissolved from tailings of the cheongyang mine significantly increased after 7 days due to the oxidation of As-bearing secondary minerals (up to ca.
of total), while As of Seobo mine-tailing samples was rarely released (ca.
of total). Dissolution experiments at an initial pH 1 liberated a higher amount of As (ca.
of total for Seobo tailings,
of total for Cheongyang tailings). In addition, good correlation between As and Fe in leached solutions with tailings was observed. The kinetic problems could be the important factor which leads to increasing concentrations of As in the runoff water. Release of As from Cheongyang tailings can potentially pose adverse impact to surface and groundwater qualities in the surrounding environment, while precipitation of secondary minerals and the adsorption of As are efficient mechanisms for decreasing the mobilities of As in the surface environment of Seobo mine area.
Effects of pH-Eh on Natural Attenuation of Soil Contaminated by Arsenic in the Dalchen Mine Area, Ulsan, Korea
Park Maeng-Eon ; Sung Kyu-Youl ; Lee Minhee ; Lee Pyeong-Koo ; Kim Min-Chul ;
Economic and Environmental Geology, volume 38, issue 5, 2005, Pages 513~523
The contamination of soils and groundwaters in the Dalcheon mine area, Ulsan, is investigated, and a natural attenuation capacity on redox and pH is evaluated. Arsenopyrite, the major source of arsenic pollution in the Dalcheon mine area, is contained up to
in tailings. Furthermore, As-bearing minerals such as loellingite, nicolite, rammelsbergite, gersdorffite cobaltite and pyrite are also source of arsenic contamination, which show various concentration of arsenic each other. Surface of pyrite and arsenopyrite in tailings partly oxidized into Fe-arsenates and Fe-oxides, which means a progressive weathering process. There is no relationship between pH and arsenic content in groundwaters, otherwise Eh and arsenic concentration in unsaturated and saturated groundwater shows positive relationship. RMB (Red Mud Bauxite) could be useful as a trigger on natural attenuation due to superior ability of removal capacity of arsenic when contaminated soil and groundwater in the Dalcheon mine area are remediated.
Arsenic Adsorption onto Pseudomonas aeruginosa Cell Surface
Lee Jong-Un ; Park Hyun-Sung ;
Economic and Environmental Geology, volume 38, issue 5, 2005, Pages 525~534
Adsorption experiments for As(V) and As(III) onto the surfaces of aerobic Pseudomonas aeruginosa, which can be readily isolated from natural media, were conducted under nutrient-absent conditions. While a small amount of As(III) was adsorbed on the bacterial cell surfaces, As(V) was not effectively removed from the solution through adsorption. The result was likely due to the electrostatic repulsion between anionic compounds of aqueous As(V) and cell surfaces of f aeruginosa. However, the bacteria forming biofilm reduced a large amount of aqueous As(V) to As(III), which indicated that microorganisms in most oligotrophic, natural geologic settings can mediate the behavior of aqueous As. Biobarriers designed to remove the various heavy metals in contaminant plume may practically lead to the enhancement of toxicity and mobility of As.
Risk Assessment of Arsenic by Human Exposure of Contaminated Soil, Groundwater and Rice Grain
Lee Jin-Soo ; Chon Hyo-Taek ;
Economic and Environmental Geology, volume 38, issue 5, 2005, Pages 535~545
Environmental survey from some abandoned metal mine areas was undertaken on to assess the risk of adverse health effects on human exposure to arsenic influenced by past Au-Ag mining activities. Elevated levels of As were found in tailings from the studied mine areas. This high concentration may have a impact on soils and waters around the tailing piles. In order to perform the human risk assessment, chemical analysis data of soils, rice grains and waters fur As have been used. The HQ values fer As via the rice grain and groundwater consumption were significantly higher compared with other exposure pathways in all metal mine areas. However, there were minimal soil and water dermal contact risks. The resulting Hl values of As from the Dongil, Okdong and Hwacheon mine areas were higher than 5.0, and their toxic risk due to drinking water and rice grain was strong in these mine areas. The cancer risk of being exposed to As by the rice grain route from the Dongil, Okdong and Hwacheon mine areas was
, respectively. The As cancer risk via the exposure pathway of drinking water from these mine areas exceeded the acceptable risk of 1 in 10,000 fer regulatory purposes. Thus, the daily intakes of groundwater and rice grain by the local residents from the Dongil, Okdong and Hwacheon mine areas can pose a potential health threat if exposed by long-term arsenic exposure.
Characteristics of Natural Arsenic Contamination in Groundwater and Its Occurrences
Ahn Joo Sung ; Ko Kyung-Seok ; Lee Jin-Soo ; Kim Ju-Yong ;
Economic and Environmental Geology, volume 38, issue 5, 2005, Pages 547~561
General characteristics of groundwater contamination by As were reviewed with several recent researches, and its occurrence in groundwater of Korea was investigated based on a ffw previous studies and a groundwater quality survey in Nonsan and Geumsan areas. In Bangladesh, which has been known as the most serious arsenic calamity country, about
of the shallow groundwaters exceeded the Bangladesh drinking water standard,
, and it was estimated that about 28 million people were exposed to concentrations greater than the standard. Groundwater was characterized by circum-neutral pH with a moderate to strong reducing conditions. Low concentrations of
, and high contents of dissolved organic carbon (DOC) and
were typical chemical characteristics. Total As concentrations were enriched in the Holocene alluvial aquifers with a dominance of As(III) species. It was generally agreed that reductive dissolution of Fe oxyhydroxides was the main mechanism for the release of As into groundwater coupling with the presence of organic matters and microbial activities as principal factors. A new model has also been suggested to explain how arsenic can naturally contaminate groundwaters far from the ultimate source with transport of As by active tectonic uplift and glaciatiion during Pleistocene, chemical weathering and deposition, and microbial reaction processes. In Korea, it has not been reported to be so serious As contamination, and from the national groundwater quality monitoring survey, only about
of grounwaters have concentrations higher than
However, it was revealed that
of mineral waters, and
of tube-well waters from Nonsan and Geumsan areas contained As concentrations above
. Also, percentages exceeding this value during detailed groundwater quality surveys were
from Jeonnam and Ulsan areas, respectively, indicating As enrichment possibly by geological factors and local mineralization. Further systematic researches need to proceed in areas potential to As contamination such as mineralized, metasedimentary rock-based, alluvial, and acid sulfate soil areas. Prior to that, it is required to understand various geochemical and microbial processes, and groundwater flow characteristics affecting the behavior of As.
Field Experiment on AMD Treatment Using Apatite and Fish Bone at the Ilkwang Mine
Choi, Jung-Chan ;
Economic and Environmental Geology, volume 38, issue 5, 2005, Pages 563~570
The purposes of this study are to examine a field test on heavy metal removal efficiency for AMD(Acid Mine Drainage) using fish bone and apatite, and to compare those results of the laboratory & the field tests. The duration of the field test was about one month and flow rates of AMD varied from 2.53 l/min to 12.8 l/min. From the result of the field test, removal efficiencies of apatite and those of fish bone are high for As, Fe, and Pb while those of fish born is higher than those of apatite far Al, Cd, Cu and Zn which are similar to the result of the previous laboratory test. In particular, average arsenic removal efficiency of apatite is higher
than that of fish bone
like the result of the previous laboratory test. In case of precipitates of phosphate compounds which are generated from chemical reaction between apatite/fish bone and AMD, those generated from apatite/AMD reactionform powder-shape while those created from fish bone/AMD reaction seem to be sludge. Therefore, apatite will be used as a precipitant for mine drainages having wide range of pH based on previous studies while fish bone will be applied as a precipitantfor AMD having lower PH and high concentration of heavy metals.
Removal of As(III) in Contaminated Groundwater Using Iron and Manganese Oxide-Coated Materials
Kim Ju-Yong ; Choi Yoon-Hyeong ; Kim Kyoung-Woong ; Ahn Joo Sung ; Kim Dong Wook ;
Economic and Environmental Geology, volume 38, issue 5, 2005, Pages 571~577
Permeable reactive barrier using iron oxide coated sand is one of effective technologies for As(V) contaminated groundwater. However, this method is restricted to As(III), because As(III) species tends to be more weakly bound to adsorbent. In order to overcome the limitation of iron oxide coated sand application to As(III) contaminated groundwater, manganese oxide materials as promoter of As(III) removal were combined to the conventional technology in this study. For combined use of iron oxide coated sand and manganese oxide coated sand, two kinds of removal methods, sequential removal method and simultaneous removal method, were introduced. Both methods showed similar removal efficiency over
for 6 hrs. However, the sequential method converted the As contaminated water to acid state (pH 4.5), on the contrary, the simultaneous method maintained neutral state (pH 6.0). Therefore, simultaneous As removal method was ascertained as a suitable treatment technology of As contaminated water. Moreover, for more effective As(III) remediation technique, polypropylene textile which has the characteristics of high surface area, low specific gravity and flexibility was applied as alternative material of sand. The combined use of coated polypropylenes by simultaneous method showed much more prominent and rapid remediation efficiency over
after 6 hrs; besides, it has practical advantages in replacement or disposal of adsorbent for simple conventional removal device.
Biosorption Characteristics of Arsenate by Chemically Modified Activated Sludge
Lee, Sang-Min ; Kim, Dong-Wook ;
Economic and Environmental Geology, volume 38, issue 5, 2005, Pages 579~585
Cheap and environmental sound biosorbent was made for the adsorption of arsenate using an waste activated sludge. The biosorbents were methylated in 9hours and 24 hours respectively for the better adsorption of arsenate. The amount adsorbed of arsenate(V) increased with increasing methylation time. The specific arsenate adsorption was 0.06mmol As(V)/g biomass when the biosorbent was methylated in 24 hours. The methylated biosorbents were also studied with pH 5, 7 and 9. The pH of the solution affect the amount of adsorption of arsenate of the biosorbent even though it was methylated. The specific arsenate adsorption of the biosorbent at pH 5 was best and it was three times greater than the amount of arsenate adsorbed at pH 9.
Arsenic Dissolution and Speciation in Groundwater: review paper
Kim Myoung-Jin ;
Economic and Environmental Geology, volume 38, issue 5, 2005, Pages 587~597
This review deals with arsenic chemistry and its occurrence in groundwater. Specifically, the paper gives an overview regarding chemical and physical properties of arsenic species, oxidation of As(III), geochemical processes related to the fate and transport of arsenic, arsenic leaching from soil, and mechanism of arsenic leaching from arsenic-containing minerals.
Treatment Technologies for Arsenic Removal from Groundwater: review paper
Bang Sunbaek ; Choe Eun Young ; Kim Kyoung-Woong ;
Economic and Environmental Geology, volume 38, issue 5, 2005, Pages 599~606
Arsenic is a significantly toxic contaminant in groundwater in many countries. Numerous treatment technologies have been developed to remove arsenic from groundwater. The USEPA recommends several technologies as the best available technology (BAT) candidates for the removal of arsenic. Based on the USEPA classification, arsenic treatment technologies can be divided into four technologies such as precipitation, membrane, ion exchange, and adsorption technology. The recent amendment of arsenic drinking water standard from 50 to
in the United States have impacted technology selection and application for arsenic removal from arsenic contaminated groundwater. Precipitation technology is most widely used to treat arsenic contaminated groundwater and can be applied to large water treatment facility. In contrast, membrane, ion exchange, and adsorption technologies are used to be applied to small water treatment system. Recently, the arsenic treatment technology in the United States and Europe move towards adsorption technology to be applied to small water treatment system since capital and maintenance costs are relatively low and operation is simple. The principals of treatment technologies, effect factors on arsenic removal, arsenic treatment efficiencies of real treatment systems are reviewed in this paper.