首页|Enhanced Cd2+removal from aqueous solution using olivine and magnesite combination:New insights into the mechanochemical synergistic effect
Enhanced Cd2+removal from aqueous solution using olivine and magnesite combination:New insights into the mechanochemical synergistic effect
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In this study,an efficient stabilizer material for cadmium(Cd2+)treatment was successfully prepared by simply co-milling olivine with magnesite.Several analytical methods including XRD,TEM,SEM and FTIR,combined with theoretical calculations(DFT),were used to inves-tigate mechanochemical interfacial reaction between two minerals,and the reaction mech-anism of Cd removal,with ion exchange between Cd2+and Mg2+as the main pathway.A fixation capacity of Cd2+as high as 270.61 mg/g,much higher than that of the pristine min-erals and even the individual/physical mixture of milled olivine and magnesite,has been obtained at optimized conditions,with a neutral pH value of the solution after treatment to allow its direct discharge.The as-proposed Mg-based stabilizer with various advantages such as cost benefits,green feature etc.,will boosts the utilization efficiency of natural min-erals over the elaborately prepared adsorbents.
School of Resources & Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China
State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control,South China Institute of Environmental Sciences,Ministry of Ecology and Environment,Guangzhou 510655,China
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