Our economy needs to collect raw materials (RMs) from mining activities and this produces an impressive amount of mining wastes and a number of environmental problems associated with the disposal of them. Nowadays, the advances of the innovative technologies and markets make mining waste sources of valuable minerals/elements, but, in order to exploit them, it is necessary to know accurate information and to develop smart strategies of management and planning. In this framework, we tested an integrated multidisciplinary approach for sustainable management and optimisation of mining wastes. We sampled iron (Fe) and manganese (Mn) wastes produced in Joda West Mine (State of Odisha-India). Afterward, X-Ray Powde r Diffraction, X-Ray Fluorescence and spectral signatures analysis were used in order to characterize the mining waste samples. Mineralogical, chemical and spectral data were used as input to classify Sentinel-2A image. The characterized mining waste map identified waste deposit areas with different percentage of Fe and Mn and represented a suitable tool for further optimizing strategies of mining waste management. In particular, the potentialities of phyto-mycoremediation of classified mining wastes for heavy metals up take and bioaccumulation were evaluated, in the perspective of their subsequent recovery from biomass through hydrometallurgical methods. The mycorrhized plant species tolerated the high concentrations of metals and were effective for the phytostabilization and phytoextraction of Cr, Cu, Ni, Sr, Zn, Mn, Fe, P, As, S, Sr, P and Rb although overall biomass growth was not suf ficient to sustain a significant recovery of heavy metals at this stage (i. e., process conditions should be optimized). Preliminary results showed that an approach based on both advanced techniques and low cost treatment methods successfully lead to significant waste reduction and materials recovery.
Sustainable management and optimization of mining wastes: an integrated multidisciplinary approach
Daniela Guglietta;Belardi G;Cappai G;Milia S;Passeri D;Salvatori R;Scotti A;Tempesta E;Trapasso F
2020
Abstract
Our economy needs to collect raw materials (RMs) from mining activities and this produces an impressive amount of mining wastes and a number of environmental problems associated with the disposal of them. Nowadays, the advances of the innovative technologies and markets make mining waste sources of valuable minerals/elements, but, in order to exploit them, it is necessary to know accurate information and to develop smart strategies of management and planning. In this framework, we tested an integrated multidisciplinary approach for sustainable management and optimisation of mining wastes. We sampled iron (Fe) and manganese (Mn) wastes produced in Joda West Mine (State of Odisha-India). Afterward, X-Ray Powde r Diffraction, X-Ray Fluorescence and spectral signatures analysis were used in order to characterize the mining waste samples. Mineralogical, chemical and spectral data were used as input to classify Sentinel-2A image. The characterized mining waste map identified waste deposit areas with different percentage of Fe and Mn and represented a suitable tool for further optimizing strategies of mining waste management. In particular, the potentialities of phyto-mycoremediation of classified mining wastes for heavy metals up take and bioaccumulation were evaluated, in the perspective of their subsequent recovery from biomass through hydrometallurgical methods. The mycorrhized plant species tolerated the high concentrations of metals and were effective for the phytostabilization and phytoextraction of Cr, Cu, Ni, Sr, Zn, Mn, Fe, P, As, S, Sr, P and Rb although overall biomass growth was not suf ficient to sustain a significant recovery of heavy metals at this stage (i. e., process conditions should be optimized). Preliminary results showed that an approach based on both advanced techniques and low cost treatment methods successfully lead to significant waste reduction and materials recovery.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
