| 摘要 |
<p>A method and a mixture for chemically stabilizing electric arc furnace dust (EAFD) containing thallium by entrapping the metals inherent in EAFD within a cementitiously hardened product from the mixture. The method includes using the pozzolanic characteristics of EAFD by forming a mixture of EAFD with sufficient water, ferrous sulfate, and Portland cement, then permitting the mixture to react to form a product having a decreased concentration of thallium in its leachate. The method may also include permitting the mixture to form a cementitiously hardened product. The composition of the present invention is the mixture of EAFD, water, ferrous sulfate, and Portland cement. Even immediately after forming the mixture and before hardening, the composition has acceptable leachate characteristics. The hardened product also has acceptable leachate concentrations.</p> |
