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Special Issue Published as part of Environmental Science & Technology special issue “From Silos to Interconnected Systems: Tackling Complex Environmental Problems Holistically”. 1. Introduction Click to copy section linkSection link copied! Cobalt (Co) and manganese (Mn) are among the critical minerals listed by the U.S. Department of the Interior due to their essential role in modern technologies and the nation’s reliance on their foreign supplies.
To maximize the recovery of Co–Mn from aqueous solutions, the effect of key process variables, namely, stirring rate, flow rate, ion concentration, and temperature, on the ozone oxidative precipitation of these elements was systematically investigated. A combination of individual experiments and a statistically designed Box-Behnken study was employed to evaluate the effects and interactions of these parameters.
Magnesite (MgCO3) and dolomite (MgCa(CO3)2) are the most stable carbonate minerals under typical Earth surface conditions, with the highest resistance to leaching and weathering. Their dissolution rates are for example 100–1000 times lower than that of calcite in a wide range of conditions, from ambient temperature to 150 °C and pH from 1 to 14 (Pokrovski et al., 2009).
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