Pollutant Characteristics and Environmental Risk Analysis of Rare Earth Waste Residue
In this work,the corrosivity,composition,phase structure and occurrence of the removed residue,acid leaching residue,molten salt slags were studied.First,the effects of reaction parameters(e.g.,leaching time,pH and temperature)on leaching contents of heavy metal ions(e.g.Cu,Zn,Pb,Cd,Ni,Cr,Be,Ba,As and Se)and rare earth elements(e.g.Dy,Er,Gd,Ho,Nd,Pr,Sm,Yb)were investigated.The main pol-lutants in those three slags,their heavy metal leaching toxicities and environmental impacts were further ana-lyzed.The present study introduces new data on the recycling and safe disposal of rare earth waste residues in China.
removed residueacid leaching residuemolten salt slagsleaching toxicityenvironmental riskrare earths
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万方数据
