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Electrodialytic remediation of copper mine tailings

2005

Available online at www.sciencedirect.com Procedia Engineering 44 (2012) 2053 –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³21´  HOHFWULF ILHOG ³2))´  RI  ZDV XVHG RQO\ LQ WDLOLQJV SUHWUHDWHG ZLWK VXOSKXULF DFLG 7DEOH  VKRZV H[SHULPHQWDO FRQGLWLRQV DQG UHVXOWV H[SUHVVHG DV FRSSHU UHPRYDO   1877-7058 © 2012 Published by Elsevier Ltd. Open access under CC BY-NC-ND license. doi:10.1016/j.proeng.2012.09.042 2054 H.K. Hansen et al. / Procedia Engineering 44 (2012) 2053 – 2055  7DEOH*HQHUDO('5FRQGLWLRQVDQGUHVXOWV ([ S 9ROWDJH 3UHWUHDWPH GURS QW 9 3XOVHG HOHFWULF ILHOG IUHTXHQF\ F\FOHVGD \ 5HPHGLDWL RQWLPH KRXUV  &RSSHU &RSSHU OHDYLQJ UHPRYDO DQRGHVLGH PJ    GLVWZDWHU       GLVWZDWHU       0+62       0+62       0+62       0+62       0+62       0+62       0+62        0  &+2       0  &+2       0  &+2       0  &+2      0+62       0+62       0+62       7KH UHVXOWV VKRZ WKDW HOHFWULF FXUUHQW FRXOG UHPRYH FRSSHU IURP ZDWHU\ WDLOLQJV VORZO\ :LWK DGGLWLRQRIVXOSKXULFDFLGWKHSURFHVVZDVHQKDQFHGGXHWRDS+GHFUHDVHIURPWRDURXQG DQGWKHFRSSHUE\WKLVUHDVRQZDVUHOHDVHGLQWKHVROXWLRQ+RZHYHUZLWKFLWULFDFLGDGGLWLRQ WKH SURFHVV ZDV IXUWKHU HQKDQFHG EHFDXVH EHVLGHV WKH S+ GHFUHDVH D IRUPDWLRQ RI FRSSHU FLWUDWHFRPSOH[HVRFFXUUHG7KHXVHRISXOVHGHOHFWULFILHOGVHQKDQFHGWKHUHPHGLDWLRQSURFHVV ,WZDVIRXQGWKDWIRUKRXUVRIUHPHGLDWLRQWLPHDQGYROWDJHGURSRI9WKHXVHRISXOVHG HOHFWULFILHOGVZLWKDWLPHUDWLR HOHFWULFILHOGLQSRVLWLRQ³21´´2))´ RILPSURYHVWKHFRSSHU UHPRYDO:LWKF\FOHVGD\WKHFRSSHUUHPRYDOLWKHDQRGHVLGHZDVQHDUO\HTXLYDOHQWWR'& H[SHULPHQWVEXWLQFUHDVLQJWRRUF\FOHVGD\WKHFRSSHUUHPRYDOZDVLQFUHDVHGE\LQ WKHDQRGHVLGHRIWKHUHPHGLDWLRQFHOO  H.K. Hansen et al. / Procedia Engineering 44 (2012) 2053 –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