In this work, microwave (MW) irradiation was employed to enhance the zero-valent iron (ZVI)-dominated de-contamination of chromite ore processing residue (COPR). A coupling system and the traditional two-step procedure were both conducted to evaluate the effects of MW irradiation on the reduction and the incorporation of COPR into the composite materials-based geopolymers. The factors including the ratios of liquid to solid, the mass ratios of ZVI to COPR, and the acid dosage had some obvious influence on the reduction of COPR in the MW system. The compressive strengths of 31.54 and 41.56 MPa were determined from the two-step procedure and the coupling system at the COPR dosage of 10% (mass ratio), respectively. The employment of MW irradiation not only strengthened the formation of the geopolymer matrices but also improved the chemical stabilization of Cr species in the solidified blocks. The coupled process was more conducive to incorporating the treated COPR into the geopolymer-based crystalline microstructures compared with the subsequent usage of ZVI reduction and MW irradiation.

在这项工作中，采用微波（MW）辐照来增强铬铁矿加工残渣（COPR）的零价铁（ZVI）为主的去污染。都进行了耦合系统和传统的两步程序来评估MW辐照对复合材料基地质聚合物中COPR还原和掺入的影响。MW系统中液固比，ZVI与COPR的质量比，酸用量等因素对降低COPR有明显的影响。通过两步程序和耦合系统分别在COPR剂量为10％（质量比）的情况下确定了31.54 MPa和41.56 MPa的抗压强度。MW辐射的采用不仅增强了地聚合物基质的形成，而且还改善了固化块中Cr物种的化学稳定性。与随后使用ZVI还原和MW辐照相比，耦合过程更有利于将处理后的COPR掺入基于地质聚合物的晶体微结构中。