Release of Heavy Metal Ion Copper and Lead of Molybdenum Mine Tailings
MA Shao-jian
LI Hui
MO Wei
SU Xiu-juan
WANG Gui-fang
WANG Ying
Abstract：To evaluate and predict the environmental hazard from molybdenum mine tailings, the law of ion release of molybdenum mine tailings was investigated by continuous static soa-king experiments for 105 days and periodically monitoring the pH values and ionic concentra-tions of copper and lead in the soaking solutions. The molybdenum mine tailings shows strong ability to neutralize the acidic solutions of pH values of 3.5-6 to neutral state and then to maintain this state. In the case of mass ratio of solid/liquid of 1:10, the monitored ionic con-centrations of copper and lead in static soaking solutions reach their maximum values (i. e. 29.52 and 9.40 μg/L) within 25 days, and then they decline and keep oscillating with different variation trends for Cu~(2+) and Pb~(2+). The mean ionic concentrations of copper and lead are 19.37 and 4.29 μg/L, respectively. The released mass rates of copper and lead are 0. 097% and 0. 043%, respectively. Under neutral conditions the molybdenum mine tailings will release Cu~(2+) and Pb~(2+) in long term and copper is easier to release out of the tailings than lead.
Keywords：molybdenum minetailingsstatic soakingheavy metalsrelease
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 829-834 )