Reduction and Immobilization of Movable Cu2+ Ions in Soils by Fe78Si9B13 Amorphous Alloy

The Fe-based amorphous alloy (Fe78Si9B13AP) is applied to the remediation of copper contaminated soil for first time. dynamic process conversion movable Cu immobilized forms in system analyzed. In addition, form transformation Cu2+ ions morphology and phase composition reaction products are characterized by scanning electron microscopy (SEM) X-ray diffraction analysis (XRD). Finally, feasibility recovering residual stabilizer particles attached magnetic separation discussed. results show that apparent rate constant Fe79Si9B13AP with higher than zero valent iron (ZVI) at all experimental temperatures. According Arrhenius formula, activation energy Fe78Si9B13AP ZVI 13.24 19.02 kJ/mol, respectively, which controlled diffusion process. lower one important reasons high activity Fe78Si9B13AP. After 7 days reaction, a continuous extraction shows main combined (hydroxide) oxide, there almost no soluble strong mobility, effectively reduced bioavailability soil. treated recovery rates 47.23% 21.56%, content certain extent. above promising new material heavy metal soils, provides more references application alloys field water metals organic matter.