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K.W. Kim
School of Earth Sciences & Environmental Engineering (SESEE) and International Environmental Research Institute (IERI), Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea

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Review
Published: 30 April 2021 in Minerals
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Crop and livestock farming on contaminated soil has been found to induce the accumulation of trace elements in edible parts of plants, with subsequent risk to human and animal health. Since rice crop is a major source of energy in worldwide diets and is consumed by more than 3 billion people, the soil–rice pathway is regarded as a prominent route of human exposure to potentially toxic elements. This study provides an overview of arsenic contamination in paddy rice from mining-impacted areas in several Asian countries that are primary rice consumers. From this review, it may be concluded that mining activities, along with the associated residual waste, significantly contribute to arsenic contamination of this food crop as rice samples from these regions were highly contaminated, with the highest total arsenic concentrations recorded being 3–4 times higher than the maximum levels proposed by the Codex Alimentarius Commission. While the contamination in China, Korea, Indonesia, and Thailand appeared to be slightly affected by mining activities, the elevated levels of arsenic in rice from mining areas in India, Bangladesh, and Vietnam could be derived from arsenic-contaminated groundwater.

ACS Style

Anh Hoang; Nouvarat Prinpreecha; Kyoung-Woong Kim. Influence of Mining Activities on Arsenic Concentration in Rice in Asia: A Review. Minerals 2021, 11, 472 .

AMA Style

Anh Hoang, Nouvarat Prinpreecha, Kyoung-Woong Kim. Influence of Mining Activities on Arsenic Concentration in Rice in Asia: A Review. Minerals. 2021; 11 (5):472.

Chicago/Turabian Style

Anh Hoang; Nouvarat Prinpreecha; Kyoung-Woong Kim. 2021. "Influence of Mining Activities on Arsenic Concentration in Rice in Asia: A Review." Minerals 11, no. 5: 472.

Journal article
Published: 20 November 2020 in Journal of Environmental Chemical Engineering
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We analyzed the tolerance of sulfur-oxidizing bacteria to Co and Cs exposure and γ-ray irradiation, and evaluated the feasibility of bioleaching to remove radionuclides from contaminated soil. The soil samples were collected in the vicinity of a nuclear power plant in the Republic of Korea and artificially contaminated with Co and Cs to mimic accidental exposure (initial concentration of Co and Cs were 253 mg/kg and 307 mg/kg, respectively). The applied bacteria were identified as Acidithiobacillus thiooxidans with a 95% similarity of DNA sequence. The bacteria enabled sulfur oxidation at Co concentration of less than 50 mg/L and irrespective of Cs concentration. In addition, the bacteria showed tolerance to 400 Gy γ-ray irradiation. Overall, the Bioleaching process removed 98% of Co and 96% of Cs from the artificially contaminated soil and, compared to control samples, approximately doubled the removal efficiency. These results demonstrate that bioleaching by sulfur-oxidizing bacteria has potential as a remediation strategy for radionuclide contaminated soils.

ACS Style

Young-Gwang Kim; Dawoon Jeong; Wooyong Um; Kyoung-Woong Kim; Myoung-Soo Ko. The bioleaching assessment for nuclear power plant-soil contaminated with Co and Cs using A.Thiooxidans sp. Journal of Environmental Chemical Engineering 2020, 9, 104791 .

AMA Style

Young-Gwang Kim, Dawoon Jeong, Wooyong Um, Kyoung-Woong Kim, Myoung-Soo Ko. The bioleaching assessment for nuclear power plant-soil contaminated with Co and Cs using A.Thiooxidans sp. Journal of Environmental Chemical Engineering. 2020; 9 (1):104791.

Chicago/Turabian Style

Young-Gwang Kim; Dawoon Jeong; Wooyong Um; Kyoung-Woong Kim; Myoung-Soo Ko. 2020. "The bioleaching assessment for nuclear power plant-soil contaminated with Co and Cs using A.Thiooxidans sp." Journal of Environmental Chemical Engineering 9, no. 1: 104791.

Research article
Published: 29 October 2020 in SN Applied Sciences
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Lignocellulosic materials, abundant and renewable materials, are gaining popularity as metal scavenging agents because of their high sorption capacities, relatively low cost and environmental-friendliness. However, there is not much research to discover how the modification of different lignocellulosic materials can enhance their metal sorption capacities. In the present study, corn hulls and rice husks were pyrolyzed at 500 °C to produce biochars and these biochars were then activated using KOH and ZnCl2 as activating agents. Material characterization was done using Field Emission-Scanning Electron Microscope (FE-SEM), Brunauer–Emmett–Teller (BET) analysis, and Fourier Transform Infrared (FTIR) analysis. Equilibrium concentrations were measured using Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES). Results indicated that the modified biosorbents removed Pb2+ more efficiently and faster than the raw hulls and husk. The KOH-treated corn husk biochar (KOH-CHB) achieved a removal capacity of >97 mg/g in the first 15 min compared to a sorption capacity of 15 mg/g achieved by raw corn husk (CH). High Pb2+ removal by activated biochars at a relatively shorter contact time was probably attributable to enhanced structures as indicated in the FT-IR, SEM, and BET results. The results also indicated that, for all eight biosorbents, the removal of Pb2+ from water followed a pseudo-second-order kinetic model with R2 values >0.94. This model was able to predict the experimental qe values with greater precision than the pseudo-first-order kinetic model. Low-cost materials used in the current study have the potential to remove toxic Pb2+ from water and this Pb2+ removal can be attained at a relatively low cost.

ACS Style

Mwemezi Johaiven Rwiza; Matthias Kleinke; Kyoung-Woong Kim. A study on Pb removal kinetics using modified agricultural wastes from Tanzania. SN Applied Sciences 2020, 2, 1 -12.

AMA Style

Mwemezi Johaiven Rwiza, Matthias Kleinke, Kyoung-Woong Kim. A study on Pb removal kinetics using modified agricultural wastes from Tanzania. SN Applied Sciences. 2020; 2 (11):1-12.

Chicago/Turabian Style

Mwemezi Johaiven Rwiza; Matthias Kleinke; Kyoung-Woong Kim. 2020. "A study on Pb removal kinetics using modified agricultural wastes from Tanzania." SN Applied Sciences 2, no. 11: 1-12.

Original paper
Published: 03 July 2020 in Environmental Geochemistry and Health
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The remediation of soil contaminated with heavy metals is an ongoing environmental concern. Paddy soils contaminated with Cd and Zn were collected from around abandoned metals mines in Korea. Limestone and steel slag were mixed with the collected soil, as amendments for Cd and Zn immobilization. Sequential extraction, lettuce cultivation and five single extraction methods were carried out to assess the effects on Cd and Zn immobilization using amendments. The exchangeable fraction of Cd and Zn was decreased and Fe–Mn oxides fraction increased by stabilization using amendments. In addition, the accumulation of Cd and Zn in lettuce decreased in treated soil and indicated the Cd and Zn immobilization effect in soil by the amendments. The extractable Cd and Zn by CaCl2 and Mehlich-3 in the untreated soils were higher than that of treated soils, whereas Cd and Zn extraction by ethylenediaminetetraacetic acid (EDTA), diethylene tetramine penta-acetic acid (DTPA) and toxicity characteristic leaching procedure (TCLP) has a small or no difference between the untreated and treated soils. The extraction results by CaCl2 and Mehlich-3 methods present reasonable results for Cd and Zn immobilization in soil than EDTA, DTPA and TCLP methods. Therefore, the choice of appropriate extraction method is very important when there is the assessment of Cd and Zn immobilization efficiency.

ACS Style

Hyeop-Jo Han; Jong-Un Lee; Myoung-Soo Ko; Kyoung-Woong Kim. Comparison of five extraction methods for evaluating cadmium and zinc immobilization in soil. Environmental Geochemistry and Health 2020, 42, 4203 -4212.

AMA Style

Hyeop-Jo Han, Jong-Un Lee, Myoung-Soo Ko, Kyoung-Woong Kim. Comparison of five extraction methods for evaluating cadmium and zinc immobilization in soil. Environmental Geochemistry and Health. 2020; 42 (12):4203-4212.

Chicago/Turabian Style

Hyeop-Jo Han; Jong-Un Lee; Myoung-Soo Ko; Kyoung-Woong Kim. 2020. "Comparison of five extraction methods for evaluating cadmium and zinc immobilization in soil." Environmental Geochemistry and Health 42, no. 12: 4203-4212.

Original paper
Published: 01 July 2020 in Environmental Geochemistry and Health
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This study investigated the contamination levels and sources of As and Cd vicinity area from Nui Phao mine that is one of the largest tungsten (W) open pit mines in the world. Soil and plant samples were collected from the study area to identify the concentrations of As and Cd using aqua-regia or HNO3 digestion. According to the Vietnamese agricultural soil criteria, all soil samples were contaminated with As and Cd. The distribution of As concentration is related to the distance from the Nui Phao mine. The higher As concentrations were measured in the area close to the mine. However, the Cd distribution in the soil showed a different pattern from As. Enrichment factor and Geoaccumulation Index (Igeo) indicated that As in the soil is derived from the mining activities, while Cd could have other geogenic or anthropogenic sources. The ranges of As and Cd concentration in polished rice grains in the Nui Phao mine area exceeded the CODEX criteria (0.2 mg/kg), which indicated extreme contamination. The arsenic concentration between soil and plant samples was determined to be a positive correlation, while the Cd concentration showed a negative correlation, implying that As and Cd have different geochemical behavior based on their sources.

ACS Style

Myoung-Soo Ko; Thi Anh Huong Nguyen; Young-Gwang Kim; Bui Mai Linh; Penradee Chanpiwat; Ha Nguyen Thi Hoang; Le Huu Tuyến; Nguyen Quoc Bien; Van Anh Nguyen; Kyoung-Woong Kim. Assessment and source identification of As and Cd contamination in soil and plants in the vicinity of the Nui Phao Mine, Vietnam. Environmental Geochemistry and Health 2020, 42, 4193 -4201.

AMA Style

Myoung-Soo Ko, Thi Anh Huong Nguyen, Young-Gwang Kim, Bui Mai Linh, Penradee Chanpiwat, Ha Nguyen Thi Hoang, Le Huu Tuyến, Nguyen Quoc Bien, Van Anh Nguyen, Kyoung-Woong Kim. Assessment and source identification of As and Cd contamination in soil and plants in the vicinity of the Nui Phao Mine, Vietnam. Environmental Geochemistry and Health. 2020; 42 (12):4193-4201.

Chicago/Turabian Style

Myoung-Soo Ko; Thi Anh Huong Nguyen; Young-Gwang Kim; Bui Mai Linh; Penradee Chanpiwat; Ha Nguyen Thi Hoang; Le Huu Tuyến; Nguyen Quoc Bien; Van Anh Nguyen; Kyoung-Woong Kim. 2020. "Assessment and source identification of As and Cd contamination in soil and plants in the vicinity of the Nui Phao Mine, Vietnam." Environmental Geochemistry and Health 42, no. 12: 4193-4201.

Original paper
Published: 06 June 2020 in Environmental Geochemistry and Health
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Nui Phao mine in Thai Nguyen Province, Vietnam, is the second-largest tungsten (W) open-pit mine in the world, but the level of environmental impacts is not well known. In order to examine the heavy metal contamination in the ecosystem of this mining area, we analyzed six trace elements (As, Cd, Cr, Cu, Pb and Zn) in the collected soil samples. The analytical results showed that all the soil samples were contaminated by Cd and As. Most of the soil samples were contaminated by As (mean value 50.93 ± 55.44 mg/kg) and Cd (mean value 15.22 ± 9.51 mg/kg), which figures are up to 16 and 23 times higher, respectively, compared with the Vietnamese soil quality standard for agriculture (QCVN 03-MT:2015/BTNMT) of 15 mg/kg for As and 1.5 mg/kg for Cd. Contamination factor (CF), enrichment factor (EF), geo-accumulation index (Igeo), principal component analysis (PCA) and hierarchical clustering analysis (HCA) were used to identify the influence of mining activity in the contamination. The CF, EF, pollution index (PI) and Igeo indicated that this area was extremely polluted by Cd, severely to moderately–heavily polluted by As and slightly to moderately polluted by other elements such as Cr, Cu, Pb and Zn. The PCA and HCA results also attribute the source of As, Pb and Zn contamination and enrichment of Cd, Cr and Cu in the study area to Nui Phao mining activities. The PI and contamination degree (Cd) values of soil quality indicate that the study area was contaminated with particular reference to Cd and As and the level of contamination was decreased in the order of Pb > Cr > Cu > Zn. The study area had high potential ecological risk, and the carcinogenic risk value was higher than the acceptable value (1 × 10−6 to 1 × 10−4). This means that the local resident health is strongly affected by Nui Phao mining activities both directly and indirectly via food consumption, when rice plant grown in the paddy field is the dominant crop in the study area.

ACS Style

Thi Ha Nguyen; Ha Nguyen Thi Hoang; Nguyen Quoc Bien; Le Huu Tuyen; Kyoung-Woong Kim. Contamination of heavy metals in paddy soil in the vicinity of Nui Phao multi-metal mine, North Vietnam. Environmental Geochemistry and Health 2020, 42, 4141 -4158.

AMA Style

Thi Ha Nguyen, Ha Nguyen Thi Hoang, Nguyen Quoc Bien, Le Huu Tuyen, Kyoung-Woong Kim. Contamination of heavy metals in paddy soil in the vicinity of Nui Phao multi-metal mine, North Vietnam. Environmental Geochemistry and Health. 2020; 42 (12):4141-4158.

Chicago/Turabian Style

Thi Ha Nguyen; Ha Nguyen Thi Hoang; Nguyen Quoc Bien; Le Huu Tuyen; Kyoung-Woong Kim. 2020. "Contamination of heavy metals in paddy soil in the vicinity of Nui Phao multi-metal mine, North Vietnam." Environmental Geochemistry and Health 42, no. 12: 4141-4158.

Journal article
Published: 23 June 2019 in Minerals
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This study was conducted to assess the removal of arsenic (As) and heavy metals from mining wastewater by the combination of adsorption, using modified iron-ore drainage sludge, and horizontal-subsurface-flow constructed wetland with common reed (Phragmites australis). The pilot-scale experiment with a constant flow rate of 5 m3/day was operated for four months using real wastewater from a Pb–Zn mine in northern Vietnam. Atomic absorption spectroscopy was used for elemental analysis in wastewater and plant. X-ray diffraction (XRD), surface charge measurements (by a particle charge detector (PCD)), Fourier-transform infrared (FTIR), and surface area Brunauer–Emmet–Teller (BET) measurements were performed to determine the characteristics of the adsorbent. The results showed that the average removals of As, Mn, Cd, Zn, and Pb by the combined system with limestone substrate during four months were 80.3%, 96.9%, 79.6%, 52.9%, and 38.7%, respectively. The use of another constructed wetland substrate, laterite, demonstrated better removal efficiency of As than limestone. The concentrations of As and heavy metals in the effluent were lower than the limits established by the QCVN 40:2011/BTNMT for industrial wastewater, which indicated the feasibility of combining adsorption and constructed wetland for the treatment of mining wastewater.

ACS Style

Ha T. H. Nguyen; Bien Q. Nguyen; Thuy T. Duong; Anh T. K. Bui; Hang T. A. Nguyen; Ha T. Cao; Nhuan T. Mai; Khai M. Nguyen; Nguyen Thi Hoang Ha; Kyoung-Woong Kim. Pilot-Scale Removal of Arsenic and Heavy Metals from Mining Wastewater Using Adsorption Combined with Constructed Wetland. Minerals 2019, 9, 379 .

AMA Style

Ha T. H. Nguyen, Bien Q. Nguyen, Thuy T. Duong, Anh T. K. Bui, Hang T. A. Nguyen, Ha T. Cao, Nhuan T. Mai, Khai M. Nguyen, Nguyen Thi Hoang Ha, Kyoung-Woong Kim. Pilot-Scale Removal of Arsenic and Heavy Metals from Mining Wastewater Using Adsorption Combined with Constructed Wetland. Minerals. 2019; 9 (6):379.

Chicago/Turabian Style

Ha T. H. Nguyen; Bien Q. Nguyen; Thuy T. Duong; Anh T. K. Bui; Hang T. A. Nguyen; Ha T. Cao; Nhuan T. Mai; Khai M. Nguyen; Nguyen Thi Hoang Ha; Kyoung-Woong Kim. 2019. "Pilot-Scale Removal of Arsenic and Heavy Metals from Mining Wastewater Using Adsorption Combined with Constructed Wetland." Minerals 9, no. 6: 379.

Journal article
Published: 21 June 2019 in Applied Geochemistry
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Phytoremediation is a plant-based, environment-friendly, and cost-effective technology that can be potentially used to remediate contaminated media. This study was conducted to evaluate the phytoextraction and phytostabilization potential, two common techniques of phytoremediation, of 21 plant species growing naturally at the largest tungsten (W) mine in Vietnam—the second largest production of W in the world. The average concentrations in different soil fractions were in the following order: residue > organically complexed, Fe- and Mn oxide-bound > carbonate bound > exchangeable. The total concentrations of arsenic (As), cadmium (Cd), copper (Cu), and zinc (Zn) in the soil varied by 34–3390, 4.87–81.6, 14.3–2080, and 21.9–370 mg/kg respectively. The concentrations of As, Cd, Cu and Zn in the shoots ranged 0.71–2400, 0.05–5.55, 4.81–249, and 13.3–380 mg/kg DW, respectively. The concentrations of As and Cd in all soil samples and Cu in 70% of soil samples collected around the mine fluctuated within 2–227, 3–54, and up to 21-folds higher than the maximum allowable limit for agricultural soils in Vietnam (QCVN 03-MT:2015/BTNMT). The results indicated that hyperaccumulation levels (mg/kg-DW) were obtained for only As in Pityrogramma calomelanos (2400) and Pteris vittata L. (1860). Based on the recorded hyperaccumulation levels, translocation and accumulation factors, biomass, and fast growth of these plants, P. calomelanos and P. vittata were considered to be promising native plants for the phytoextraction of As contaminated soils. Bidens pilosa L. also has great potential for phytostabilization of mining soils contaminated with As and heavy metals.

ACS Style

Nguyen Thi Hoang Ha; Tran Thi Huyen Nga; Nguyen Ngoc Minh; Bui Thi Kim Anh; Nguyen Thi An Hang; Nguyen Anh Duc; Mai Trong Nhuan; Kyoung-Woong Kim. Uptake of arsenic and heavy metals by native plants growing near Nui Phao multi-metal mine, northern Vietnam. Applied Geochemistry 2019, 108, 104368 .

AMA Style

Nguyen Thi Hoang Ha, Tran Thi Huyen Nga, Nguyen Ngoc Minh, Bui Thi Kim Anh, Nguyen Thi An Hang, Nguyen Anh Duc, Mai Trong Nhuan, Kyoung-Woong Kim. Uptake of arsenic and heavy metals by native plants growing near Nui Phao multi-metal mine, northern Vietnam. Applied Geochemistry. 2019; 108 ():104368.

Chicago/Turabian Style

Nguyen Thi Hoang Ha; Tran Thi Huyen Nga; Nguyen Ngoc Minh; Bui Thi Kim Anh; Nguyen Thi An Hang; Nguyen Anh Duc; Mai Trong Nhuan; Kyoung-Woong Kim. 2019. "Uptake of arsenic and heavy metals by native plants growing near Nui Phao multi-metal mine, northern Vietnam." Applied Geochemistry 108, no. : 104368.

Journal article
Published: 07 June 2019 in Environmental Health
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Growing evidence indicates that in utero arsenic exposures in humans may increase the risk of adverse health effects and development of diseases later in life. This study aimed to evaluate potential health risks of in utero arsenic exposure on genetic damage in newborns in relation to maternal arsenic exposure. A total of 205 pregnant women residing in arsenic-contaminated areas in Hanam province, Vietnam, were recruited. Prenatal arsenic exposure was determined by arsenic concentration in mother’s toenails and urine during pregnancy and in umbilical cord blood collected at delivery. Genetic damage in newborns was assessed by various biomarkers of early genetic effects including oxidative/nitrative DNA damage (8-hydroxydeoxyguanosine, 8-OHdG, and 8-nitroguanine), DNA strand breaks and micronuclei (MN) in cord blood. Maternal arsenic exposure, measured by arsenic levels in toenails and urine, was significantly increased (p < 0.05) in subjects residing in areas with high levels of arsenic contamination in drinking water. Cord blood arsenic level was significantly increased in accordance with maternal arsenic exposure (p < 0.001). Arsenic exposure in utero is associated with genotoxic effects in newborns indicated as increased levels of 8-OHdG, 8-nitroguanine, DNA strand breaks and MN frequency in cord blood with increasing levels of maternal arsenic exposure. Maternal toenail arsenic level was significantly associated with all biomarkers of early genetic effects, while cord blood arsenic levels associated with DNA strand breaks and MN frequency. In utero arsenic exposure is associated with various types of genetic damage in newborns potentially contributing to the development of diseases, including cancer, later in life.

ACS Style

Panida Navasumrit; Krittinee Chaisatra; Jeerawan Promvijit; Varabhorn Parnlob; Somchamai Waraprasit; Chalida Chompoobut; Ta Thi Binh; Doan Ngoc Hai; Nguyen Duy Bao; Nguyen Khac Hai; Kyoung-Woong Kim; Leona D. Samson; Joseph H. Graziano; Chulabhorn Mahidol; Mathuros Ruchirawat. Exposure to arsenic in utero is associated with various types of DNA damage and micronuclei in newborns: a birth cohort study. Environmental Health 2019, 18, 51 .

AMA Style

Panida Navasumrit, Krittinee Chaisatra, Jeerawan Promvijit, Varabhorn Parnlob, Somchamai Waraprasit, Chalida Chompoobut, Ta Thi Binh, Doan Ngoc Hai, Nguyen Duy Bao, Nguyen Khac Hai, Kyoung-Woong Kim, Leona D. Samson, Joseph H. Graziano, Chulabhorn Mahidol, Mathuros Ruchirawat. Exposure to arsenic in utero is associated with various types of DNA damage and micronuclei in newborns: a birth cohort study. Environmental Health. 2019; 18 (1):51.

Chicago/Turabian Style

Panida Navasumrit; Krittinee Chaisatra; Jeerawan Promvijit; Varabhorn Parnlob; Somchamai Waraprasit; Chalida Chompoobut; Ta Thi Binh; Doan Ngoc Hai; Nguyen Duy Bao; Nguyen Khac Hai; Kyoung-Woong Kim; Leona D. Samson; Joseph H. Graziano; Chulabhorn Mahidol; Mathuros Ruchirawat. 2019. "Exposure to arsenic in utero is associated with various types of DNA damage and micronuclei in newborns: a birth cohort study." Environmental Health 18, no. 1: 51.

Journal article
Published: 15 January 2019 in Geochemistry: Exploration, Environment, Analysis
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ACS Style

Jajinjav Yondonjamts; Bolormaa Oyuntsetseg; Ochirkhuyag Bayanjargal; Makiko Watanabe; Lunchakorn Prathumratana; Kyoung-Woong Kim. Geochemical source and dispersion of copper, arsenic, lead, and zinc in the topsoil from the vicinity of Erdenet mining area, Mongolia. Geochemistry: Exploration, Environment, Analysis 2019, 19, 110 -120.

AMA Style

Jajinjav Yondonjamts, Bolormaa Oyuntsetseg, Ochirkhuyag Bayanjargal, Makiko Watanabe, Lunchakorn Prathumratana, Kyoung-Woong Kim. Geochemical source and dispersion of copper, arsenic, lead, and zinc in the topsoil from the vicinity of Erdenet mining area, Mongolia. Geochemistry: Exploration, Environment, Analysis. 2019; 19 (2):110-120.

Chicago/Turabian Style

Jajinjav Yondonjamts; Bolormaa Oyuntsetseg; Ochirkhuyag Bayanjargal; Makiko Watanabe; Lunchakorn Prathumratana; Kyoung-Woong Kim. 2019. "Geochemical source and dispersion of copper, arsenic, lead, and zinc in the topsoil from the vicinity of Erdenet mining area, Mongolia." Geochemistry: Exploration, Environment, Analysis 19, no. 2: 110-120.

Editorial
Published: 11 December 2018 in Environmental Geochemistry and Health
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ACS Style

Kyoung-Woong Kim; Soon-Oh Kim; Kongkea Phan; Penradee Chanpiwat. Editorial. Environmental Geochemistry and Health 2018, 41, 323 -323.

AMA Style

Kyoung-Woong Kim, Soon-Oh Kim, Kongkea Phan, Penradee Chanpiwat. Editorial. Environmental Geochemistry and Health. 2018; 41 (1):323-323.

Chicago/Turabian Style

Kyoung-Woong Kim; Soon-Oh Kim; Kongkea Phan; Penradee Chanpiwat. 2018. "Editorial." Environmental Geochemistry and Health 41, no. 1: 323-323.

Original paper
Published: 11 September 2018 in Environmental Geochemistry and Health
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Lead contamination in topsoil of the mining and smelting area of Mitrovica, Kosovo, was investigated for total concentrations and chemical fractions by sequential extraction analysis, mineralogical fractions by X-ray diffraction (XRD) and scanning electron microscopy with energy-dispersive X-ray spectrometer (SEM-EDX). The study revealed that all samples contained Pb exceeding USEPA standard of 400 mg kg−1. The highest total concentration of Pb (125,000 mg kg−1) was the soil from the former smelter. Sequential extraction results showed that the predominant form of Pb was associated with Fe-Mn oxide-bound fraction which ranged from 45.37 to 71.61% of total concentrations, while carbonate and silicate Pb-binding fractions were dominant when physical measurements (XRD and SEM-EDX) were applied. Application of Pb isotope ratios (206Pb/207Pb and 208Pb/206Pb), measured by inductively coupled plasma mass spectrometry, identified that Pb contamination is originated from similar anthropogenic source. The results reflected that the Pb contamination in the soil of this area is serious. In order to provide proper approaches on remediation and prevention of health impacts to the people in this area, a continuous monitoring and health risk assessment are recommended.

ACS Style

Lunchakorn Prathumratana; Rokho Kim; Kyoung-Woong Kim. Lead contamination of the mining and smelting district in Mitrovica, Kosovo. Environmental Geochemistry and Health 2018, 42, 1033 -1044.

AMA Style

Lunchakorn Prathumratana, Rokho Kim, Kyoung-Woong Kim. Lead contamination of the mining and smelting district in Mitrovica, Kosovo. Environmental Geochemistry and Health. 2018; 42 (3):1033-1044.

Chicago/Turabian Style

Lunchakorn Prathumratana; Rokho Kim; Kyoung-Woong Kim. 2018. "Lead contamination of the mining and smelting district in Mitrovica, Kosovo." Environmental Geochemistry and Health 42, no. 3: 1033-1044.

Original paper
Published: 28 August 2018 in Environmental Geochemistry and Health
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The aim of the present study is to investigate water quality and potential trace metal contaminations in the Northeastern part of Cambodia. Tube well (n = 35), hand-dug well (n = 18), channel (n = 10) and lake/pond (n = 8) water samples were randomly collected from Mondolkiri province which is located in the Northeastern highland of Cambodia. A water sample was collected in two different bottles. One was filled in 30-mL polyethylene bottle after which was acidified to pH < 2 with concentrated HNO3. Another was filled in 250-mL polyethylene bottle. The collected water sampled was stored in a cooler during fieldwork and transferred to a fridge where they are stored at 4 °C for analysis. The measurement of pH, ORP, dissolved oxygen (DO), turbidity, conductivity, total dissolved solids (TDS) and salinity was taken at laboratory following standard procedures. All chemical measurement of trace metals were taken by inductively coupled plasma mass spectrometry (ICP-MS). Analytical results reveal that tube well (47.1%), hand-dug well (77.8%) and channel water (20%) have pH < 6.5. Turbidity of tube well (32.4%), hand-dug well (5.6%), lake water (12.5%) and all channel water samples are exceeded Cambodia regulation of 5 NTU. Mean As, Cd, Cr, Cu, Ni, Pb and Zn concentrations in Mondolkiri’s water sources are below Cambodian drinking water quality standard and WHO’s drinking water quality guideline. However, the upper range of Pb in tube well and channel water and Zn in tube well are exceeding Cambodia regulation. Concurrently, the mean concentrations of Fe and Mn in tube well and channel water are exceeded Cambodian aesthetic guideline of 300 µg L−1 and 100 µg L−1, respectively. This study suggests that appropriate treatment technologies are necessary for residents in the Mondolkiri province to access to clean water and minimize their potential health risks.

ACS Style

Kongkea Phan; Samrach Phan; Soknim Se; Huy Sieng; Laingshun Huoy; Kyoung-Woong Kim. Assessment of water quality and trace metal contaminations in Mondolkiri province in the Northeastern part of Cambodia. Environmental Geochemistry and Health 2018, 41, 401 -409.

AMA Style

Kongkea Phan, Samrach Phan, Soknim Se, Huy Sieng, Laingshun Huoy, Kyoung-Woong Kim. Assessment of water quality and trace metal contaminations in Mondolkiri province in the Northeastern part of Cambodia. Environmental Geochemistry and Health. 2018; 41 (1):401-409.

Chicago/Turabian Style

Kongkea Phan; Samrach Phan; Soknim Se; Huy Sieng; Laingshun Huoy; Kyoung-Woong Kim. 2018. "Assessment of water quality and trace metal contaminations in Mondolkiri province in the Northeastern part of Cambodia." Environmental Geochemistry and Health 41, no. 1: 401-409.

Original paper
Published: 21 August 2018 in Environmental Geochemistry and Health
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Soil stabilization is a remedial technique that reduces the exposure of the soil environment to soil contaminants. Its efficacy can be assessed by determining whether the environmental availability of a contaminant decreases following treatment. We evaluated several chemical leaching treatments by assessing both contaminant leachability and bioaccumulation in the earthworm Eisenia fetida, and determined the most effective treatment for achieving soil stabilization. Soil samples contaminated with As, Cd, Cu, Pb, and/or Zn were collected from abandoned mine areas and stabilized by adding limestone and steel slag (5% and 2% w/w, respectively). All leaching and earthworm tests were conducted using both contaminated and stabilized soils. In addition to bioaccumulation in earthworms, several toxicity parameters (number of cocoons, growth changes, and survival rates) were also assessed to determine the effects of the treatments on the earthworms. The study showed that treatment of soil with EDTA-NH4OAc resulted in a significant decrease in contaminant leachability following soil stabilization. There was an increase in survival and growth of earthworms exposed to the stabilized soil compared with those exposed to the non-stabilized soil. Bioaccumulation in earthworms was found to be statistically correlated with the leachability of As by EDTA-NH4OAc. We conclude that limestone and steel slag effectively decreased the availability of heavy metals in the soil and reduced the toxicity to earthworms. Leaching with EDTA-NH4OAc has the potential to be predictive in estimating the bioavailability of As in soils, but further studies are needed if it is to be proposed as a standard method.

ACS Style

Azilah Abd Aziz; Byung-Tae Lee; Hyeop-Jo Han; Kyoung-Woong Kim. Assessment of the stabilization of heavy metal contaminants in soils using chemical leaching and an earthworm bioassay. Environmental Geochemistry and Health 2018, 41, 447 -460.

AMA Style

Azilah Abd Aziz, Byung-Tae Lee, Hyeop-Jo Han, Kyoung-Woong Kim. Assessment of the stabilization of heavy metal contaminants in soils using chemical leaching and an earthworm bioassay. Environmental Geochemistry and Health. 2018; 41 (1):447-460.

Chicago/Turabian Style

Azilah Abd Aziz; Byung-Tae Lee; Hyeop-Jo Han; Kyoung-Woong Kim. 2018. "Assessment of the stabilization of heavy metal contaminants in soils using chemical leaching and an earthworm bioassay." Environmental Geochemistry and Health 41, no. 1: 447-460.

Journal article
Published: 30 July 2018 in Chemosphere
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This study aims to investigate adsorption mechanisms of As(V) and Sb(V) on calcined Mg/Al layered double hydroxide (LDH). The calcination process of calcined Mg/Al LDH (CLDH) considerably enhanced the adsorption capacity of As(V) and Sb(V) via reconstruction and new formation of brandholzite-like compound, respectively. The maximum removal capacity for As(V) and Sb(V) by CLDH was 102.9 mg/g and 303.3 mg/g, respectively. The regeneration efficiency of As(V) by 0.5 M NaOH with 5 M NaCl mixed solution reached 72.3% during five regeneration cycles, while Sb(V) regeneration gradually decreased to 32.0% at the fifth regeneration cycles due to the irreversible surface complexation mechanism. Extended X-ray absorption fine structure (EXAFS) data displays that Al plays a dominant role in the adsorption of As(V) on CLDH through bidentate-binuclear inner-sphere complex. On the other hand, XRD and EXAFS data revealed that Sb(V) formed a brandholzite-like structure Mg[Sb(OH)6]2·6H2O which forms outer-sphere complex by the hydrogen bonding between hexagonal plates of magnesium and antimony hydroxide. This new formation process could be attributed to high affinity between Sb(V) and Mg/Al LDH. In addition, this new formation of brandholzite-like structure causes the partial transformation of original layered structure during reconstruction process with decreasing regeneration efficiency.

ACS Style

Sang-Ho Lee; Masato Tanaka; Yoshio Takahashi; Kyoung-Woong Kim. Enhanced adsorption of arsenate and antimonate by calcined Mg/Al layered double hydroxide: Investigation of comparative adsorption mechanism by surface characterization. Chemosphere 2018, 211, 903 -911.

AMA Style

Sang-Ho Lee, Masato Tanaka, Yoshio Takahashi, Kyoung-Woong Kim. Enhanced adsorption of arsenate and antimonate by calcined Mg/Al layered double hydroxide: Investigation of comparative adsorption mechanism by surface characterization. Chemosphere. 2018; 211 ():903-911.

Chicago/Turabian Style

Sang-Ho Lee; Masato Tanaka; Yoshio Takahashi; Kyoung-Woong Kim. 2018. "Enhanced adsorption of arsenate and antimonate by calcined Mg/Al layered double hydroxide: Investigation of comparative adsorption mechanism by surface characterization." Chemosphere 211, no. : 903-911.

Published erratum
Published: 01 July 2018 in Chemosphere
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ACS Style

Seyong Lee; Dong-Hun Kim; Kyoung-Woong Kim. Corrigendum to “The enhancement and inhibition of mercury reduction by natural organic matter in the presence of Shewanella oneidensis MR-1” [Chemosphere 194, (March 2018) 515–522]. Chemosphere 2018, 203, 526 .

AMA Style

Seyong Lee, Dong-Hun Kim, Kyoung-Woong Kim. Corrigendum to “The enhancement and inhibition of mercury reduction by natural organic matter in the presence of Shewanella oneidensis MR-1” [Chemosphere 194, (March 2018) 515–522]. Chemosphere. 2018; 203 ():526.

Chicago/Turabian Style

Seyong Lee; Dong-Hun Kim; Kyoung-Woong Kim. 2018. "Corrigendum to “The enhancement and inhibition of mercury reduction by natural organic matter in the presence of Shewanella oneidensis MR-1” [Chemosphere 194, (March 2018) 515–522]." Chemosphere 203, no. : 526.

Article
Published: 14 May 2018 in Environmental Geochemistry and Health
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Mercuric species, Hg(II), interacts strongly with dissolved organic matter (DOM) through the oxidation, reduction, and complexation that affect the fate, bioavailability, and cycling of mercury, Hg, in aquatic environments. Despite its importance, the reactions between Hg(II) and DOM have rarely been studied in the presence of different concentrations of chloride ions (Cl−) under anoxic conditions. Here, we report that the extent of Hg(II) reduction in the presence of the reduced DOM decreases with increasing Cl− concentrations. The rate constants of Hg(II) reduction ranged from 0.14 to 1.73 h−1 in the presence of Cl− and were lower than the rate constant (2.41 h−1) in the absence of Cl−. Using a thermodynamic model, we showed that stable Hg(II)–chloride complexes were formed in the presence of Cl−. We further examined that H(0) was oxidized to Hg(II) in the presence of the reduced DOM and Cl− under anoxic conditions, indicating that Hg(II) reduction is inhibited by the Hg(0) oxidation. Therefore, the Hg(II) reduction by the reduced DOM can be offset due to the Hg(II)–chloride complexation and Hg(0) oxidation in chloride-rich environments. These processes can significantly influence the speciation of Hg and have an important implication for the behavior of Hg under environmentally relevant concentrations.

ACS Style

Seyong Lee; YoungHee Roh; Kyoung-Woong Kim. Influence of chloride ions on the reduction of mercury species in the presence of dissolved organic matter. Environmental Geochemistry and Health 2018, 41, 71 -79.

AMA Style

Seyong Lee, YoungHee Roh, Kyoung-Woong Kim. Influence of chloride ions on the reduction of mercury species in the presence of dissolved organic matter. Environmental Geochemistry and Health. 2018; 41 (1):71-79.

Chicago/Turabian Style

Seyong Lee; YoungHee Roh; Kyoung-Woong Kim. 2018. "Influence of chloride ions on the reduction of mercury species in the presence of dissolved organic matter." Environmental Geochemistry and Health 41, no. 1: 71-79.

Journal article
Published: 01 April 2018 in Journal of Environmental Sciences
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As silver nanoparticles (AgNPs)-based products are being broadly used in commercial industries, an ecotoxicological understanding of the AgNPs being released into the environment should be further considered. Here, we investigate the comparative toxicity of AgNPs and silver ions (Ag ions) to Escherichia coli K-12 strain, a representative ecotoxicological bioreporter. This study showed that toxicities of AgNPs and Ag ions to E. coli K-12 strain display different relationships when existing individually or when coexisting, and in the presence of L-cysteine materials. These findings suggest that the toxicology research of nanomaterials should consider conditions when NPs coexist with and without their bioavailable ions.

ACS Style

Yoojin Choi; Hyun-A Kim; Kyoung-Woong Kim; Byung-Tae Lee. Comparative toxicity of silver nanoparticles and silver ions to Escherichia coli. Journal of Environmental Sciences 2018, 66, 50 -60.

AMA Style

Yoojin Choi, Hyun-A Kim, Kyoung-Woong Kim, Byung-Tae Lee. Comparative toxicity of silver nanoparticles and silver ions to Escherichia coli. Journal of Environmental Sciences. 2018; 66 ():50-60.

Chicago/Turabian Style

Yoojin Choi; Hyun-A Kim; Kyoung-Woong Kim; Byung-Tae Lee. 2018. "Comparative toxicity of silver nanoparticles and silver ions to Escherichia coli." Journal of Environmental Sciences 66, no. : 50-60.

Original paper
Published: 24 March 2018 in Environmental Geochemistry and Health
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Colloid mobilization is a significant process governing colloid-associated transport of heavy metals in subsurface environments. It has been studied for the last three decades to understand this process. However, colloid mobilization and heavy metal transport in soil solutions have rarely been studied using soils in South Korea. We investigated the colloid mobilization in a variety of flow rates during sampling soil solutions in sand columns. The colloid concentrations were increased at low flow rates and in saturated regimes. Colloid concentrations increased 1000-fold higher at pH 9.2 than at pH 7.3 in the absence of 10 mM NaCl solution. In addition, those were fourfold higher in the absence than in the presence of the NaCl solution at pH 9.2. It was suggested that the mobility of colloids should be enhanced in porous media under the basic conditions and the low ionic strength. In real field soils, the concentrations of As, Cr, and Pb in soil solutions increased with the increase in colloid concentrations at initial momentarily changed soil water pressure, whereas the concentrations of Cd, Cu, Fe, Ni, Al, and Co lagged behind the colloid release. Therefore, physicochemical changes and heavy metal characteristics have important implications for colloid-facilitated transport during sampling soil solutions.

ACS Style

Seyong Lee; Il-Won Ko; In-Ho Yoon; Dong-Wook Kim; Kyoung-Woong Kim. Colloid mobilization and heavy metal transport in the sampling of soil solution from Duckum soil in South Korea. Environmental Geochemistry and Health 2018, 41, 469 -480.

AMA Style

Seyong Lee, Il-Won Ko, In-Ho Yoon, Dong-Wook Kim, Kyoung-Woong Kim. Colloid mobilization and heavy metal transport in the sampling of soil solution from Duckum soil in South Korea. Environmental Geochemistry and Health. 2018; 41 (1):469-480.

Chicago/Turabian Style

Seyong Lee; Il-Won Ko; In-Ho Yoon; Dong-Wook Kim; Kyoung-Woong Kim. 2018. "Colloid mobilization and heavy metal transport in the sampling of soil solution from Duckum soil in South Korea." Environmental Geochemistry and Health 41, no. 1: 469-480.

Original paper
Published: 13 March 2018 in Environmental Geochemistry and Health
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To develop a novel granular adsorbent to remove arsenic and antimony from water, calcined Mg/Al-layered double-hydroxide (CLDH)-incorporated polyethersulfone (PES) granular adsorbents (PES-LDH) were prepared using a core-shell method having 25% PES in an N,N-dimethylformamide solution. The PES-LDH displayed a spherical hollow shape having a rough surface and the average particle size of 1–2 mm. On the PES-LDH surface, nanosized CLDH (100–150 nm) was successfully immobilized by consolidation between PES and CLDH. The adsorption of Sb(V) by PES-LDH was found to be more favorable than for As(V), with the maximum adsorption capacity of As(V) and Sb(V) being 7.44 and 22.8 mg/g, respectively. The regeneration results indicated that a 0.5 M NaOH and 5 M NaCl mixed solution achieved an 80% regeneration efficiency in As(V) adsorption and desorption. However, the regeneration efficiency of Sb(V) gradually decreased due to its strong binding affinity, even though the PES-LDH showed much higher Sb(V) adsorption efficiency than As(V). This study suggested that PES-LDH could be a promising granular adsorbent for the remediation of As(V) and Sb(V) contained in wastewater.

ACS Style

Sang-Ho Lee; Heechul Choi; Kyoung-Woong Kim. Removal of As(V) and Sb(V) in aqueous solution by Mg/Al-layered double hydroxide-incorporated polyethersulfone polymer beads (PES-LDH). Environmental Geochemistry and Health 2018, 40, 2119 -2129.

AMA Style

Sang-Ho Lee, Heechul Choi, Kyoung-Woong Kim. Removal of As(V) and Sb(V) in aqueous solution by Mg/Al-layered double hydroxide-incorporated polyethersulfone polymer beads (PES-LDH). Environmental Geochemistry and Health. 2018; 40 (5):2119-2129.

Chicago/Turabian Style

Sang-Ho Lee; Heechul Choi; Kyoung-Woong Kim. 2018. "Removal of As(V) and Sb(V) in aqueous solution by Mg/Al-layered double hydroxide-incorporated polyethersulfone polymer beads (PES-LDH)." Environmental Geochemistry and Health 40, no. 5: 2119-2129.