In this work, microwave-assisted hydrothermal process was applied to modify the municipal solid waste incineration (MSWI) fly ash and get zeolitic production. The condition of hydrothermal process was fixed at 200 °C and 30 min. The 1 mol/L Na₂HPO₄ was selected as the additive, and the liquid to solid ratio was 3 ml/g. X-ray diffraction results revealed that analogous zeolite crystals formed by the MSWI fly ash during the hydrothermal process. The cation exchange capacity (CEC) was 0.498 meq/g of the modified fly ash, which increased about 22 times compared to the raw MSWI fly ash. To obtain the adsorption mechanism of the modified fly ash, the experiments of adsorption isotherm and kinetics were researched. The adsorption isotherms of heavy metal cations in mixed solution could be described by Langmuir isotherm equations, with a high correlation coefficient value. The experimental products were better fitted by the pseudo second-order kinetics rather than the pseudo first-order kinetics. Although the adsorption capacity of the modified fly ash needs to be promoted, it is a potential utilization for MSWI fly ash to be the original materials as adsorbents.

在这项工作中，微波辅助水热工艺被用于改性城市固体废物焚烧（MSWI）粉煤灰并获得沸石生产。水热过程的条件固定在200°C和30分钟。1 mol / L Na ₂ HPO ₄选择Al 2 O 3作为添加剂，液固比为3ml / g。X射线衍射结果表明，MSWI粉煤灰在水热过程中形成了类似的沸石晶体。改性粉煤灰的阳离子交换容量（CEC）为0.498 meq / g，与原始MSWI粉煤灰相比增加了约22倍。为了获得改性粉煤灰的吸附机理，对吸附等温线和动力学实验进行了研究。重金属阳离子在混合溶液中的吸附等温线可以用Langmuir等温方程描述，具有较高的相关系数值。实验产品通过拟二级动力学比拟一级动力学更好地拟合。尽管需要提高改性粉煤灰的吸附能力，