【摘要】 为了探究危废焚烧飞灰再利用的可能性，通过超声波对添加K₂HPO₄、KOH的飞灰进行处理，探究处理后飞灰对Cd²⁺、Cr³⁺、Pb²⁺、Cu²⁺、Zn²⁺吸附特性；并采用XRD、SEM、BET、EDS等检测方法分析吸附机理。结果表明，KOH添加剂掺量0.5,超声波功率180 W条件下，超声波处理40 min后的危废焚烧飞灰对Cd²⁺、Cr³⁺、Pb²⁺、Cu²⁺、Zn²⁺吸附效果最好，最大吸附量可分别达到48.99,30.31,51.32,63.79,43.22 mg/g。吸附过程更符合Langmuir等温吸附模型，表明以单层吸附为主。动力学拟合结果更符合准二级动力学模型，说明吸附过程主要为化学吸附。更多还原

【Abstract】 In order to explore the resource utilization prospect of fly ash from hazardous waste incineration, the fly ash added with K₂HPO₄ and KOH were treated by ultrasonic wave to explore the adsorption characteristics of Cd²⁺,Cr³⁺,Pb²⁺,Cu²⁺,Zn²⁺,and the adsorption mechanism was analyzed by XRD,SEM,BET and EDS.The results show that the fly ash of hazardous waste incineration has the best adsorption effect on Cd²⁺,Cr³⁺,Pb²⁺,Cu²⁺,Zn²⁺ when the dosage of KOH additive is 0.5 and the ultrasonic power is 180 W.The maximum adsorption capacity was 48.99,30.31,51.32,63.79 and 43.22 mg/g, respectively.The adsorption process is more consistent with Langmuir isothermal adsorption model, indicating that monolayer adsorption is dominant.The results of kinetic fitting are more consistent with the quasi-second-order kinetic model, indicating that the adsorption process is mainly chemical adsorption.更多还原