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[2P0110-14-01] Carrier-microencapsulation using Iron-catecholate Complexes and their Effects on Pyrite Oxidation

○XINLONG LI¹, Kosuke Naruwa¹, Chie Harada¹, Carlito Tabelin¹, Mayumi Ito¹, Hiroyoshi Naoki¹ (1. Hokkaido University)

Keywords:Ferrous ion, Ferric ion, Catechol, Pyrite, Oxidation

Carrier-microencapsulation (CME) is a technique to form metal-oxide/hydroxide coating specifically on pyrite surface to suppress pyrite oxidation, which causes acid mine drainage formation. In this study, carrier-microencapsulation using Fe³⁺- and Fe²⁺-catecholate complexes was investigated by electrochemical and leaching experiments. The results showed that these complexes formed iron-oxyhydroxide coatings on pyrite and suppressed both anodic and cathodic half-cell reactions of pyrite oxidation.