scholarly journals Acid Mine Drainage Sources and Impact on Groundwater at the Osarizawa Mine, Japan

Minerals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 998
Author(s):  
Naoto Nishimoto ◽  
Yosuke Yamamoto ◽  
Saburo Yamagata ◽  
Toshifumi Igarashi ◽  
Shingo Tomiyama
Keyword(s):  
Acid Mine Drainage ◽  
River Water ◽  
Mine Drainage ◽  
Flow System ◽  
Chemical Properties ◽  
Environmental Isotopes ◽  
Mountain Slope ◽  
Recharge Area ◽  
Acid Mine ◽  
Akita Prefecture

Understanding the origin of acid mine drainage (AMD) in a closed mine and groundwater flow system around the mine aids in developing strategies for environmental protection and management. AMD has been continuously collected and neutralized at Osarizawa Mine, Akita Prefecture, Japan, since the mine was closed in the 1970s, to protect surrounding river water and groundwater quality. Thus, water samples were taken at the mine and surrounding groundwaters and rivers to characterize the chemical properties and environmental isotopes (δ2H and δ18O). The results showed that the quality and stable isotope ratios of AMD differed from those of groundwater/river water, indicating that the recharge areas of AMD. The recharge area of AMD was evaluated as the mountain slope at an elevation of 400–500 m while that of the surrounding groundwater was evaluated at an elevation of 350–450 m, by considering the stable isotopes ratios. This indicates that the groundwater affected by AMD is limited to the vicinity of the mine and distributed around nearby rivers.

ASSESSMENT OF POLLUTANTS INPUT OF ACID MINE DRAINAGE AND DOMESTIC ACTIVITIES IN ARIES RIVER WATER, ROMANIA - A CHEMOMETRIC APPROACH

2015 ◽  
Vol 14 (11) ◽  
pp. 2567-2576
Author(s):  
Erika Andrea Levei ◽  
Tiberiu Frentiu ◽  
Michaela Ponta ◽  
Marin Senila ◽  
Oana Teodora Moldovan
Keyword(s):  
Acid Mine Drainage ◽  
River Water ◽  
Mine Drainage ◽  
Acid Mine ◽  
Domestic Activities ◽  
Chemometric Approach

scholarly journals Integrating Amendment and Liquid Fertilizer for Aided-Phytostabilization and Its Impacts on Soil Microbiological Properties in Arsenic-Contaminated Soil

2020 ◽  
Vol 10 (11) ◽  
pp. 3985 ◽  
Author(s):  
Min-Suk Kim ◽  
Hyun-Gi Min ◽  
Jeong-Gyu Kim
Keyword(s):  
Enzyme Activity ◽  
Acid Mine Drainage ◽  
Contaminated Soil ◽  
Mine Drainage ◽  
Inorganic Nitrogen ◽  
Chemical Properties ◽  
Soil Chemical Properties ◽  
Biological Assessment ◽  
Liquid Fertilizer ◽  
Acid Mine

Indiscriminate overuse of liquid fertilizer and arsenic (As) contaminated soil by abandoned mines is one of the important environmental issues in Korea. This study was carried out to solve these two problems. Amendments (limestone, red mud and acid mine drainage sludge), liquid fertilizer and plant vegetation (Hairy vetch; Vicia villosa Roth) were simultaneously treated. Some soil chemical properties (pH, dissolved organic carbon, inorganic nitrogen content, and bioavailable As), soil respiration and enzyme activity (urease activity and dehydrogenase activity) were determined for chemical and biological assessment. Amendments decreased bioavailable As in soil, and acid mine drainage sludge had the best reduction efficiency in alkali soil. Liquid fertilizer affects not only soil chemical properties but also biological properties. Through multiple regression analysis, the rhizosphere effect through plant cultivation using specific root length index was reflected in the result of soil microbial and enzyme activity. In the reclamation of As-contaminated soil, the synergistic effect of multiple treatments could be confirmed. In particular, biological assessment indicators could be useful when evaluating the complex treatment of various restoration techniques, including the phytoremediation method. Based on these results, a long-term follow-up study on the field scale will be possible.

scholarly journals Chemical characteristics of organic wastes and their potential use for acid mine drainage remediation

2012 ◽  
Vol 12 (2) ◽  
pp. 167
Author(s):  
Ali Munawar ◽  
Riwandi Riwandi
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Chemical Properties ◽  
Metal Sulfide ◽  
Organic Wastes ◽  
Chicken Manure ◽  
Nutrient Concentrations ◽  
Organic Substrates ◽  
Empty Fruit Bunch ◽  
Acid Mine

Organic substrate is an important component of biological treatments for acid mine drainage (AMD) remediation systems. It provides organic substrates to sulfate-reducing bacteria (SRB) in the sulfate (SO4) reduction, resulting in increased alkalinity and metal sulfide precipitates. Natural organic matters vary in their characteristics, and therefore may perform differently for remediation properties. This study was aimed to characterize four locally available organic wastes (bark, empty fruit bunch, sawdust, and chicken manure) potential for AMD remediation. Their chemical properties and elemental compositions were measured. An anaerobic incubation of these wastes in AMD was undertaken to determine their remediation properties. The pH, electrical conductivity (EC), redox potential (Eh), and dissolved Fe and SO4 of the mixtures were measured after the 1st, 7th, 14th, and 30th day of the incubation at room temperature. The results demonstrated that organic wastes varied in their chemical properties and performed differently in treating AMD. Organic wastes containing high alkalinity (high pH) and nutrient concentrations (chicken manure and empty fruit bunch) improved AMD quality through increasing pH (>6) and reducing dissolved Fe and SO4 concentrations. Although sawdust and bark (high CEC) did not increase pH up to acceptable standard at most time, they apparently were able to remove dissolved Fe from AMD through adsorption mechanism.

Integrated Environmental Monitoring of AMD Affected Waters using Hyperspectral Imaging and In-situ Analytics

2020 ◽  
Author(s):  
Hernan Flores ◽  
Sandra Lorenz ◽  
Robert Jackisch ◽  
Laura Tusa ◽  
Cecilia Contreras ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Near Infrared ◽  
Mine Drainage ◽  
Chemical Properties ◽  
Hyperspectral Data ◽  
Dissolved Metals ◽  
Mining Sites ◽  
Acid Mine ◽  
Field Samples ◽  
Water Ph

<p>One of the potential major consequences of mining activities is the degradation of the surrounding ecosystems by Acid Mine Drainage (AMD). A high-resolution hyperspectral drone-borne survey provides a useful, fast, and non-invasive tool to monitor the acid mine drainage mineralogy in mining sites. In this study, we propose to integrate drone-borne visible-to-near infrared (VNIR) hyperspectral data and physicochemical field data from water and sediments together with laboratory analysis for precise mineralogical and surface water mapping. The Tintillo River is an extraordinary case of the collection of acidic leachates in southwest Spain. This river is highly contaminated, with large quantities of dissolved metals (Fe, Al, Cu, Zn, etc.) and acidity, which later discharged into the Odiel River. At the confluence of the Tintillo and Odiel rivers, different geochemical and mineralogical processes typical of the interaction of very acidic water (pH 2.5 – 3.0) with circum-neutral water (pH 7.0 – 8.0) occur. The high contrast among waters makes this area propitious for the use of hyperspectral data to characterize both rivers and better evaluate mine water bodies with remote sensing imagery. We present an approach that makes use of a supervised random forest regression for the extended mapping of water properties, using the data from collected field samples, as training set for the algorithm. Experimental results show water surface maps that quantify the concentration of dissolved metals and physical-chemical properties along the covered region and mineral classification maps distribution (jarosite, goethite, schwertmannite, etc.). These results highlight the capabilities of drone-borne hyperspectral data for monitoring mining sites by extrapolating the hydrochemical properties from certain and specific areas, covered during field campaigns, to larger regions where accessibility is limited. By following this method, it is possible to rapidly discriminate and map the degree of AMD contamination in water for its future treatment or remediation.</p>

scholarly journals Seasonal variation in an acid mine drainage microbial community

2017 ◽  
Vol 63 (2) ◽  
pp. 137-152 ◽  
Author(s):  
Ryan R. Auld ◽  
Nadia C.S. Mykytczuk ◽  
Leo G. Leduc ◽  
Thomas J.S. Merritt
Keyword(s):  
Microbial Community ◽  
Acid Mine Drainage ◽  
Water Temperature ◽  
Mine Drainage ◽  
Direct Sequencing ◽  
Chemical Properties ◽  
Rrna Genes ◽  
Ice Thickness ◽  
Metal Concentrations ◽  
Acid Mine

Environmental oxidation and microbial metabolism drive production of acid mine drainage (AMD). Understanding changes in the microbial community, due to geochemical and seasonal characteristics, is fundamental to AMD monitoring and remediation. Using direct sequencing of the 16S and 18S rRNA genes to identify bacterial, archaeal, and eukaryotic members of the microbial community at an AMD site in Northern Ontario, Canada, we found a dynamic community varying significantly across winter and summer sampling times. Community composition was correlated with physical and chemical properties, including water temperature, pH, conductivity, winter ice thickness, and metal concentrations. Within Bacteria, Acidithiobacillus was the dominant genus during winter (11%–57% of sequences) but Acidiphilium was dominant during summer (47%–87%). Within Eukarya, Chrysophyceae (1.5%–94%) and Microbotrymycetes (8%–92%) dominated the winter community, and LKM11 (4%–62%) and Chrysophyceae (25%–87%) the summer. There was less diversity and variability within the Archaea, with similar summer and winter communities mainly comprising Thermoplasmata (33%–64%) and Thermoprotei (5%–20%) classes but also including a large portion of unclassified reads (∼40%). Overall, the active AMD community varied significantly between winter and summer, with changing community profiles closely correlated to specific differences in AMD geochemical and physical properties, including pH, water temperature, ice thickness, and sulfate and metal concentrations.

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