Pérez López, RafaelCama, J.Nieto Liñán, José MiguelAyora Ibáñez, Carlos2014-09-192014-09-192004http://hdl.handle.net/10272/8822The addition of alkaline substances is a technique commonly used to prevent acid production generated by the weathering of sulphide-rich sludge. In this work, we show the effectiveness of fly ash, a waste of coal combustion, as an acid neutralizing residue, by means of the construction of a leaching saturated column fills with sulphide sludge and fly ash. In addition, in order to understand the behaviour of both wastes inside the column, a fly ash leaching test (leachates reach a pH>10) and two flow-through experiments at pH 9 were carried out to calculate oxidative dissolution rates of pyritic sludge in presence of the fly ashspaAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Sulphide sludgeFly ashLeaching testFlow-through experimentsColumn experimentsjournal articleopen access