Current Occurrence and Heavy Metal Contamination Assessment of Seepage from Mine Waste Dumping Sites in Korea

Park, Chang Koo; Kim, Jeong Wook; Jung, Myung Chae; Park, Hyun Sung; Kim, Dong Kwan; Oh, Youn Soo

doi:10.32390/ksmer.2018.55.6.588

Cited by 6 publications

(2 citation statements)

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“…The predominant As species found in contaminated waters and acid mine drainage (AMD) are arsenite (As 3þ ) and arsenate (As 5þ ), both of which are highly soluble and mobile over a wide range of pH and Eh conditions (Park et al, 2018a(Park et al, , 2019aTabelin et al, 2010Tabelin et al, , 2012aTabelin et al, , b, 2014aTabelin et al, , 2017a. Arsenic is a toxic metalloid known to cause numerous diseases like hyperpigmentation, keratosis, anemia, and neuropathy as well as the increased risk of developing several types of cancers even at minute amounts (i.e., μg/L levels) when ingested continuously for prolonged periods of time (i.e., chronic poisoning) (Duker et al, 2005;Mohan and Pittman, 2007;Park et al, 2019b;Seno et al, 2019;Tabelin et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Carrier-microencapsulation of arsenopyrite using Al-catecholate complex: nature of oxidation products, effects on anodic and cathodic reactions, and coating stability under simulated weathering conditions

Tabelin

Seno

Jeon

et al. 2020

Heliyon

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Mining activities often generate large amounts of sulfide-rich wastes containing arsenopyrite (FeAsS), which when dissolved releases toxic arsenic (As) and generates acid mine drainage (AMD) that are both disastrous to the environment. To suppress arsenopyrite dissolution, a technique that selectively coats sulfide minerals with a protective layer of Al-oxyhydroxide called Al-based carrier-microencapsulation (CME) was developed. Although a previous study of the authors showed that Al-based CME could significantly limit arsenopyrite dissolution, nature of the coating formed on arsenopyrite, including its electrochemical properties, is still not well understood. Moreover, stability of the coating once exposed to weathering conditions remains unclear. Better understanding of these important issues would greatly improve Al-based CME especially in its application to real mine wastes. In this study, nature of the coating formed by Al-based CME was investigated using SEM-EDX, DRIFTS and XPS while the electrochemical properties of the coating were evaluated by cyclic voltammetry and chronoamperometry. Meanwhile, stability of the coating was elucidated using consecutive batch leaching experiments and weathering cell tests.SEM-EDX, DRIFTS and XPS results indicate that the protective coating formed on arsenopyrite by Al-based CME was mainly composed of bayerite (α-Al(OH) 3 ), gibbsite (γ-Al(OH) 3 ), and boehmite (γ-AlO(OH)). These Al-based coatings, which have insulating properties, made arsenopyrite less electrochemically active. The coatings also limited the extent of both the anodic and cathodic half-cell reactions of arsenopyrite oxidation that suppressed As release and acid generation. Weathering cell tests indicated that the oxidation of CME-treated arsenopyrite was effectively limited until about 15 days but after this, it started to gradually progress with time due to the increasing acidity of the system where Al-based coatings became unstable. Nonetheless, CME-treated arsenopyrite was less oxidized based on the released amounts of Fe, As and S suppressed by 80, 60 and 70%, respectively, compared with the one treated with control.

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Section: Introductionmentioning

confidence: 99%

Carrier-microencapsulation of arsenopyrite using Al-catecholate complex: nature of oxidation products, effects on anodic and cathodic reactions, and coating stability under simulated weathering conditions

Tabelin

Seno

Jeon

et al. 2020

Heliyon

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“…그러나 광산폐기물 적치장의 노후 및 지반 침하 에 따른 적치장 시설물의 안정성 문제를 발생시키고 있다. 즉, 광해방지사업을 수행한 광산지역에서 적치장의 침출 수 발생, 광물찌꺼기 유실 등으로 주변 지역은 물론 하부 수 계, 토양, 식물 등을 오염시키며 사람에게까지 악영향을 미 치고 있는 것으로 알려져 있다 (Kim et al, 2002;Kim et al, 2005;Kang et al, 2007;Jung et al, 2012;Kim et al, 2014;Kim et al, 2016;Park et al, 2018;Yoon et al, 2020). 이렇 듯 매립을 통한 광해복원은 오염물질의 근원적인 처리방식 이 아니기 때문에 오염물질의 모니터링 및 확산 방지를 위 한 지속적인 유지•보수 관리가 필요하여 정부 및 지자체 등 관련 기관의 불필요한 예산이 투입되고 있는 현실이다.…”

Section: 서 론unclassified

Recovery Characteristics of Critical Elements in Tailings from Abandoned Metal Mines

Kwon,

Hwang,

Cha

et al. 2024

J. Korean Soc. Miner. Energy Resour. Eng.

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Four tailings representative of mineralization types were taken at abandoned metal mines, and 32 elements classified as from critical minerals were analyzed. Among the elements, vanadium (V), bismuth (Bi), manganese (Mn), and antimony (Sb), contained at concentrations exceeding the average abundance of the earth's crust, were examined in terms of their recovery characteristics by heavy liquid and magnetic separations. Although tailings from the Fe-Ti mine contained 1,354 mg/kg of V, improvement of V grade was limited by the separations. Tailings from the W mine with 153 mg/kg of Bi were increased by 3.5 and 6.3 times by concentration by heavy liquid and magnetic separations, respectively. In addition, tailings from the Cu-Pb-Zn mine with 13,756 mg/kg of Mn were concentrated about 1.8 times by heavy liquid separation. Tailings from the Zn mine with 87 mg/kg of Sb were concentration by 1.7 times by magnetic separation. This study promotes recycling through the mineral processing of abandoned tailings.

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Integrated geochemical and geophysical monitoring for the assessment of natural pollutant mitigation in heavy metal-contaminated areas of South Korea, Deagu

Song,

Lee,

Lee

et al. 2024

Environ Sci Pollut Res

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Current Occurrence and Heavy Metal Contamination Assessment of Seepage from Mine Waste Dumping Sites in Korea

Cited by 6 publications

References 0 publications

Carrier-microencapsulation of arsenopyrite using Al-catecholate complex: nature of oxidation products, effects on anodic and cathodic reactions, and coating stability under simulated weathering conditions

Carrier-microencapsulation of arsenopyrite using Al-catecholate complex: nature of oxidation products, effects on anodic and cathodic reactions, and coating stability under simulated weathering conditions

Recovery Characteristics of Critical Elements in Tailings from Abandoned Metal Mines

Integrated geochemical and geophysical monitoring for the assessment of natural pollutant mitigation in heavy metal-contaminated areas of South Korea, Deagu

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