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Author |
Sato, D.; Tazaki, K. |
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Title |
Calcification treatment of mine drainage and depositional formula of heavy metals |
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Journal Article |
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2000 |
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Chikyu Kagaku = Earth Science |
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54 |
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5 |
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328-336 |
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acid mine drainage Asia calcification deposition ettringite Far East heavy metals Ishikawa Japan Japan lime Ogoya Mine pollution sulfates waste water water treatment 22, Environmental geology |
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Abstract |
Depositional formula of heavy metals after disposal of the mine drainage from the Ogoya Mine in Ishikawa Prefecture, Japan, was mineralogically investigated. Strong acidic wastewater (pH 3.5) from pithead of the mine contains high concentration of heavy metals. In this mine, neutralizing coagulation treatment is going on by slaked lime (calcium hydroxides: Ca(OH) (sub 2) ). Core samples were collected at disposal pond to which the treated wastewater flows. The core samples were divided into 44 layers based on the color variation. The mineralogical and chemical compositions of each layer were analyzed by an X-ray powder diffractometer (XRD), an energy dispersive X-ray fluorescence analyzer (ED-XRF) and a NCS elemental analyzer. The upper parts are rich in brown colored layers, whereas discolored are the deeper parts. The color variation is relevant to Fe concentration. Brown colored core sections are composed of abundant hydrous ferric oxides with heavy metals, such as Cu, Zn, and Cd. On the other hand, S concentration gradually increases with depth. XRD data indicated that calcite decreases with increasing depth, and ettringite is produced at the deeper parts. Cd concentration shows similar vertical profile to those of calcite and ettringite. The results revealed that hydrous ferric oxides, calcite and ettringite are formed on deposition, whereby incorporating the heavy metals. |
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0366-6611 |
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Calcification treatment of mine drainage and depositional formula of heavy metals; 2001-032610; References: 19; illus. incl. 1 table, sketch map Japan (JPN); GeoRef; Japanese |
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CBU @ c.wolke @ 16543 |
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252 |
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Author |
Lee, B.H. |
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Title |
Constructed wetlands: Treatment of concentrated storm water runoff (Part A) |
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Journal Article |
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2006 |
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Environmental Engineering Science |
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23 |
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2 |
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320-331 |
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mine water treatment |
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Abstract |
The aim of this research was to assess the treatment efficiencies for gully pot liquor of experimental vertical-flow constructed wetland filters containing Phragmites australis (Cav.) Trin. ex Steud. (common reed) and filter media of different adsorption capacities. Six out of 12 filters received inflow water spiked with metals. For 2 years, hydrated nickel and copper nitrate were added to sieved gully pot liquor to simulate contaminated primary treated storm runoff. For those six constructed wetland filters receiving heavy metals, an obvious breakthrough of dissolved nickel was recorded after road salting during the first winter. However, a breakthrough of nickel was not observed, since the inflow pH was raised to eight after the first year of operation. High pH facilitated the formation of particulate metal compounds such as nickel hydroxide. During the second year, reduction efficiencies of heavy metal, 5-days at 20 degrees C N-Allylthiourea biochemical oxygen demand (BOD) and suspended solids (SS) improved considerably. Concentrations of BOD were frequently < 20 mg/L. However, concentrations for SS were frequently > 30 mg/L. These are the two international thresholds for secondary wastewater treatment. The BOD removal increased over time due to biomass maturation, and the increase of pH. An analysis of the findings with case-based reasoning can be found in the corresponding follow-up paper (Part B). |
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Constructed wetlands: Treatment of concentrated storm water runoff (Part A); Wos:000236600700007; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 16932 |
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112 |
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Author |
Kuyucak, N. |
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Mining, the Environment and the Treatment of Mine Effluents |
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1998 |
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Int. J. Environ. Pollut. |
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10 |
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2 |
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315-325 |
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mine water treatment acid mine drainage high density sludge lime neutralization mining environment passive treatment sulfate-reducing bacteria |
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The environmental impact of mining on the ecosystem, including land, water and air, has become an unavoidable reality. Guidelines and regulations have been promulgated to protect the environment throughout mining activities from start-up to site decommissioning. In particular, the occurrence of acid mine drainage (AMD), due to oxidation of sulfide mineral wastes, has become the major area of concern to many mining industries during operations and after site decommissioning. AMD is characterized by high acidity and a high concentration of sulfates and dissolved metals. If it cannot be prevented or controlled, it must be treated to eliminate acidity, and reduce heavy metals and suspended solids before release to the environment. This paper discusses conventional and new methods used for the treatment of mine effluents, in particular the treatment of AMD. |
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0957-4352 |
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Mining, the Environment and the Treatment of Mine Effluents; Isi:000078420600009; AMD ISI | Wolkersdorfer |
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CBU @ c.wolke @ 17477 |
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56 |
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Author |
Smyth, D.J.A.; Blowes, D.W.; Benner, S.G.; Hulshof, A.M.; Nelson, J.D. |
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In situ treatment of groundwater impacted by acid mine drainage using permeable reactive materials |
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2001 |
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Proceedings of the Eighth international conference on Tailings and mine waste '01 |
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313-322 |
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acid mine drainage; environmental management; ground water; in situ; permeability; pollution; reclamation; sulfate ion; water treatment 22, Environmental geology |
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9058091821 |
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In situ treatment of groundwater impacted by acid mine drainage using permeable reactive materials; GeoRef; English; 2003-003552; Tailings and mine waste '01, Fort Collins, CO, United States, Jan. 16-19, 2001 References: 19; illus. |
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CBU @ c.wolke @ 5770 |
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236 |
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Author |
Jarvis, A.P.; Younger, P.L. |
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Design, construction and performance of a full-scare compost wetland for mine-spoil drainage treatment at quaking houses |
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1999 |
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Jciwem |
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13 |
Issue |
5 |
Pages |
313-318 |
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Wetlands and estuaries geographical abstracts: physical geography hydrology (71 6 8) composting constructed wetland design performance assessment United Kingdom EnglandCounty Durham |
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Acidic spoil-heap drainage, containing elevated concentrations of iron, aluminium and manganese, has been polluting the Stanley Burn in County Durham for nearly two decades. Following the success of a pilot-scale wetland (the first application of its kind in Europe), a full-scale wetland was installed. Waste manures and composts have been used as the main substrate which is contained within embankments constructed from compacted pulverized fuel ash. The constructed wetland, which cost less than £20,000 to build, has consistently reduced iron and aluminium concentrations and has markedly lowered the acidity of the drainage. A third phase of activities at the site aims to identify and eliminate pollutant-release 'hot spots' within the spoil. |
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0951-7359 |
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Design, construction and performance of a full-scare compost wetland for mine-spoil drainage treatment at quaking houses; 2227678; United-Kingdom 9; Geobase |
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CBU @ c.wolke @ 17546 |
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339 |
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