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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >The Evaluation of the Heavy Metal Leaching Behavior of MSWI-FA Added Alkali-Activated Materials Bricks by Using Different Leaching Test Methods
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The Evaluation of the Heavy Metal Leaching Behavior of MSWI-FA Added Alkali-Activated Materials Bricks by Using Different Leaching Test Methods

机译：用不同的浸出试验方法评价MSWI-FA加碱活化材料砖的重金属浸出行为

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摘要

Alkali-activated materials (AAMs) not only have the potential to replace cement applications in architecture and civil engineering, but also have an excellent effect on the stabilization solidification of hazardous industrial wastes. This study used two types of municipal solid waste incineration fly ash (MSWI-FA)—grate firing fly ash (GFFA) and fluidized bed fly ash (FBFA)—as AAMs brick raw materials. It is discovered from this study that AAMs bricks with different weight ratios of GFFA and FBFA can both meet the required standard of GB21144-2007 (Solid concrete brick). From the results obtained from the four leaching tests, the equilibrium pH of the leachate varies, resulting in significant differences in the leaching of heavy metals in Raw GFFA, Raw FBFA, and AAMs bricks with GFFA and FBFA. The AAMs brick with the addition of GFFA and FBFA has an alkali activation system to encapsulate heavy metals. By comparing the results obtained from the CEN/TS 14429 leaching behavior test and the four batch leaching tests, it was found that the most influential factors for the heavy metal leaching concentration are whether the heavy metal has been solidified/stabilized in the samples. GFFA and FBFA tend to have consistent characteristics after being activated by alkali to form AAMs bricks. This can be confirmed by the acid neutralization ability concentrated on a specific pH range. The results obtained from CEN/TS14429 verified that the AAMs bricks with the addition of GFFA and FBFA have excellent environmental compatibility and that it provides a comprehensive evaluation on the environmental compatibility of the test materials and products. This demonstrated that the MSWI-FA is suitable for used as alkali-activated materials and its products have the potential to be commercially used in the future.
机译：碱活化材料（AAM）不仅具有取代建筑和土木工程中的水泥应用的潜力，而且对有害工业废物的稳定固化也具有出色的作用。这项研究使用两种类型的城市垃圾焚烧粉煤灰（MSWI-FA）–炉排燃烧粉煤灰（GFFA）和流化床粉煤灰（FBFA）–作为AAM砖的原料。从这项研究中发现，具有不同重量比的GFFA和FBFA的AAM砖均可满足GB21144-2007的要求标准（实心混凝土砖）。从这四个浸出试验获得的结果来看，浸出液的平衡pH值会发生变化，从而导致使用GFFA和FBFA的生GFFA，生FBFA和AAM砖中重金属的浸出存在显着差异。添加了GFFA和FBFA的AAMs砖具有碱活化系统，可以包裹重金属。通过比较从CEN / TS 14429浸出行为测试和四次分批浸出测试获得的结果，发现对重金属浸出浓度影响最大的因素是样品中重金属是否已固化/稳定。 GFFA和FBFA在被碱活化形成AAM砖后趋于具有一致的特性。这可以通过浓缩在特定pH范围内的酸中和能力来证实。从CEN / TS14429获得的结果证明，添加GFFA和FBFA的AAMs砖具有优异的环境相容性，并且可以对测试材料和产品的环境相容性进行全面评估。这表明MSWI-FA适合用作碱活化材料，其产品具有将来在商业上使用的潜力。

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