Variations in Geochemical characteristics of the Acid Mine Drainages due to Mineral-Water Interactions in Donghae Mine Area in Taebaek, Korea

전체 글

(1) , 35, 1 , 55-66, 2002 Econ. Environ. Geol., 35(1), 55-66, 2002.

(2) . . Variations in Geochemical characteristics of the Acid Mine Drainages due to Mineral-Water Interactions in Donghae Mine Area in Taebaek, Korea Jeong-Jin Kim* and Soo-Jin Kim School of Earth and Environmental Sciences, Seoul National University, Seoul 151-742, Korea There are several abandoned coal mines around Donghae mine area in the Taebaek coal field. Two major creeks, Soro and Sanae, are contaminated with the colored precipitates formed from the coal mine drainages. Bed rocks of the study area consist of limestone, shale, and sandstone. Limestone consisted mainly of calcite and dolomite, and shale of quartz, pyropyllite and chlorite, and sandstone of quartz and illite. Coal coal spoil dumps composed mainly of pyrite and chlorite. The oxidative dissolution of sulfide minerals leads to acid mine drainage and adds the metal ions in the stream water. The ion concentrations of Fe, Ca, Mg, Al, Si, SO4 in the stream polluted by AMD are generally higher than those in the unpolluted stream water. High concentrations of Ca and Mg, Al and Si can be resulted from dissolution of carbonate minerals such as calcite, dolomite and aluminosilicates such as chlorite, pyrophyllite. Although the Fe, Al, Si, SO4 contents are considerably high in the acid water released from the mine adits, they become decreased downstream due to dilution of unpolluted water and precipitation of oxide/hydroxide and sulfate minerals on the bottom of stream.. coal mines, pyrite, AMD, aluminosilicates, oxide/hydroxide.

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(39) . Field measurement data and chemical compositions of the acidic and unpouted water samples collected from the study area. Temp (oC). EC (µS/cm). Cl− (mg/l). NO3− (mg/l). SO42− (mg/l). Na (mg/l). Mg (mg/l). Al (mg/l). Si (mg/l). K (mg/l). Ca (mg/l). Mn (mg/l). Fe (mg/l). Co (mg/l). Cu (mg/l). Zn (mg/l). 8.02 5.60 7.93 4.88 3.79 4.45 3.48 5.30 4.38 8.15 6.96 5.74 3.48 3.53 4.49 5.53 4.67 4.14 8.31 7.04. 507 535 506 574 833 392 504 629 618 312 476 380 1007 1170 953 700 1609 684 341 531. 0.97 2.18 0.84 1.63 0.37 1.67 0.44 0.50 0.60 2.23 0.32 0.91 0.01 0.89 0.84 0.43 0.47 1.40 2.43 1.83. 1.24 5.82 1.08 6.11 2.84 7.15 4.15 N.D 9.21 13.58 N.D 4.75 0.48 3.66 4.23 0.79 2.32 3.03 5.62 0.57. 231.28 249.75 233.20 364.80 686.50 365.30 620.90 108.60 296.70 47.87 124.70 177.90 529.20 637.80 696.10 381.00 1286.00 441.65 86.18 268.14. 1.13 1.86 1.05 1.88 1.74 1.95 1.75 1.45 1.46 1.21 1.28 1.23 1.23 1.75 1.77 1.39 1.88 1.56 1.12 1.22. 19.15 21.44 22.34 21.40 27.23 25.80 32.81 15.20 21.61 8.57 14.85 16.99 36.30 44.81 39.33 25.65 92.58 33.75 9.31 19.51. 0.13 1.55 0.35 3.39 26.55 16.55 46.21 0.06 22.10 0.12 0.01 0.34 23.66 32.71 24.68 3.39 9.66 23.35 0.17 0.25. 2.83 5.22 0.06 0.30 0.57 6.95 10.67 3.07 6.75 2.55 3.16 3.88 8.80 10.10 8.17 5.90 7.38 8.44 2.28 4.69. 1.58 2.37 2.88 2.29 2.84 0.94 1.08 0.53 0.68 0.31 0.41 0.48 1.02 2.12 1.82 1.06 3.19 3.01 1.05 1.93. 79.24 68.58 59.82 75.89 84.27 85.52 96.14 80.73 64.25 47.92 72.88 51.88 83.55 128.45 116.32 92.25 168.01 110.17 53.59 77.51. 0.29 1.62 0.75 1.46 3.23 2.11 3.92 0.69 1.81 0.00 0.69 0.81 3.38 4.79 3.59 1.90 9.07 3.98 0.21 1.52. 0.00 0.00 0.00 0.00 0.92 0.23 3.52 1.10 0.56 0.00 4.79 0.00 48.44 4.72 0.01 20.22 147.49 5.84 0.06 12.45. 0.00 0.01 0.03 0.01 0.06 0.04 0.09 0.00 0.03 0.00 0.00 0.00 0.09 0.12 0.07 0.02 0.23 0.08 0.00 0.01. 0.00 0.00 0.02 0.07 0.05 0.02 0.05 0.00 0.03 0.00 0.00 0.00 0.02 0.03 0.02 0.00 0.00 0.04 0.01 0.01. 0.00 0.16 0.09 0.16 0.37 0.28 0.50 0.02 0.24 0.00 0.00 0.12 0.75 0.75 0.54 0.28 1.48 0.48 0.00 0.20. 8.17 8.22 8.13 8.23 8.11 8.12 8.06 7.64 7.73 8.32. 190 185 180 148 193 206 159 186 229 203. 0.13 2.45 1.43 3.95 0.62 1.22 3.90 1.17 4.32 4.48. 6.60 15.39 6.33 12.98 15.32 7.99 15.97 6.62 16.66 15.07. 15.00 7.71 8.23 6.31 6.69 7.16 6.64 10.65 8.67 8.41. 0.96 0.73 0.95 1.71 0.97 1.09 1.62 1.15 1.10 1.44. 5.01 2.20 5.22 2.62 1.73 5.05 3.18 4.76 2.15 2.66. 0.02 0.12 0.15 0.00 0.01 0.03 0.00 0.00 0.00 0.08. 2.68 0.04 0.05 0.00 0.00 3.57 2.19 3.15 3.18 2.21. 0.74 1.16 1.00 1.04 0.83 0.41 0.46 0.38 0.42 0.74. 32.53 27.70 25.42 24.63 35.06 36.28 25.26 34.67 40.57 25.53. 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00. 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00. 0.00 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00. 0.00 0.01 0.02 0.01 0.01 0.00 0.00 0.00 0.00 0.01. 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00. . acidic water W0433 8.9 W0502 15.5 W0533 15.9 W0602 20.7 W0611 19.2 W0702 21.7 W0712 22.4 W0739 23.6 W0802 17.7 W0821 17.8 W0839 12.1 W0907 14.2 W0937 12.6 W1006 11.8 W1007 11.7 W1033 11.1 W1038 12.8 W1106 11.5 W1121 9.7 W1133 11.8 unpoluted water W0430 7.3 W0527 13.0 W0530 13.5 W0622 15.2 W0627 15.8 W0730 18.5 W0822 14.2 w0930 13.1 W01027 9.0 W1122 9.7. pH.

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(42) . Monthly total precipitations in the Taebaek area. (unit: mm). Years. Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec. 1999 2000. 3.3 34.4. 6.4 2.2. 78.2 16.3. 119.5 53.5. 115.5 80.5. 179.5 115.5. 147.5 99.5. 435.4 290.5. 462.5 469.0. 87.0 18.5. 25.0 26.5. 6.6 3.0. Variations of EC, Eh, and ion concentration against pH in acid mine water and unpoluted stream water from the study area.. 2d ! f6;0 rD` gh +: XY@ u0 st 0 fV 'f'o d *¢ < #$ : p\ 20 . . #$. rD p ä;0 rD 20 O` ghi d 9: ' 'f'od 0 V 20 O` gh-I . #$. &.+. .

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