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Nanoscale processes during the interaction of aluminosilicate and carbonate mineral surfaces with acid mine drainage (AMD)

Authors
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Elsevier Science Ltd
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Keywords
  • Mineralogía

Abstract

Gddschmicl Conference Abstracts 2009 Nanoscale processes during the interaction of aluminosilicate and carbonate mineral surfaces with acid mine drainage (AMD) K. KOWAS1, A, GoDELITSAS1., IM_ ASTILLERO�, S. LADAsl,s, KENNoul. C. POTAMITI1·4,M_ ZERVOU4, A, LAOOYIANNI�, S. HAR.rSSOPULO�, TH_ MAVROMOUSTAKOS6.4 tFaculty of Qedogy and Geoenviromnent, Univernty of Athens, Panepstimioupoli,15784 Zogra]i1ou, Greece 2Foculty ofQedogical Sciences, Complutense University of Mam d, Ciudad Universitaria, 28040 Madrid, Spain 3DepOItrnent ofdtemical Engineering, University of Patras, University Campus, 26500 Patras, Greece �nstitute of Organic and Phwmaceutical Chemist!)', NHRF, 48 V. Coostantinou Av., 11635 Athens, Greece "Institute of Nuclear Physics, NCSR "Demokritos", 15310 Agrua Paraskevi, Athens, Greece toepartment of Chemistry, Uni versity of Athens, Panepistimioupdi, 15171 ZograJi:tou, Greece Macroscopc experiments (using pH-meter, ICP, XRD, SEM·EDS) have shown that lhe interaction of alwninosilicale OIld carbonate minerals with AMD is related 10 pH increase and subsequent retlloval of metals such as Fe. Mn, Zn and Pb. The subsequent study of the processes by means of advanced microscopic and spectroscopic lecimi<p.les (in-situ. CM-AFM, XPS, RBS, Sdid-Stale MA5-NllIlR) revealed distinct changes in the nanotopogra}fly and Ihe composition of mineral near­ rurface layers, not particularly relaled to bulk structural changes. On the other hmd, it was incicated that coupled dissolutioo and socption (mainly surface [Kecipitatioo/co­ precipitation md adsocptiOll or even absorptioo) phenomena occur simultaneously at mineral-water interfaces. _00 __ ..... _- Taking into account the above experimenlal dala, generalized figures COIl be suggested in ordet- 10 descri� in nanoscale the various ossolution and sorption mechanisms laki ng place wring interaction of AMD with alwuinosilicale (zeolite) and carbonate (calcite) mineral surfaces. AD77

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