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Pulverized fuel ash solidification/stabilization of waste: comparison between beneficial reuse of contaminated marine mud and sediment
Journal of Environmental Engineering and Landscape Management ( IF 1.0 ) Pub Date : 2015-09-29 , DOI: 10.3846/16486897.2015.1021699
Ivan Y. TANG 1 , Dickson Y. S. YAN 2 , Irene M. C. LO 1 , Tongzhou LIU 3
Affiliation  

This study aimed to maximize the utilization of contaminated marine mud and sediment for beneficial reuse by solidification/stabilization (S/S) treatment with cement and pulverized fuel ash (PFA). For the purposes of waste maximization and enhancing the mechanical property of the S/S mixtures, mixing 75% by mass of either contaminated marine mud or sediment with 20% and 5% of cement and PFA, respectively, was found to be the optimal mix design. Their unconfined compressive strengths reached up to 8.32 MPa and 4.47 MPa, respectively. Apart from the mechanical property, according to the U.S.EPA, the TCLP results show that all regulated heavy metals were immobilized to a safe level and are available for engineering application such as fill material. The results of XRD reveal that the formation of CSH gel in the S/S treated mud and sediment is responsible for the strength development and heavy metal immobilization.



中文翻译:

粉煤灰的固化/废物稳定化:受污染的海洋泥浆和沉积物的有益再利用之间的比较

这项研究旨在通过利用水泥和粉煤灰(PFA)进行固化/稳定化(S / S)处理,最大限度地利用受污染的海洋泥浆和沉积物,以进行有益的再利用。为了最大限度地提高废物和增强S / S混合物的机械性能,发现分别将质量百分比为75%的受污染海洋泥浆或沉积物与20%和5%的水泥和PFA混合设计。它们的无侧限抗压强度分别达到了8.32 MPa和4.47 MPa。根据USEPA,除机械性能外,TCLP结果表明,所有受管制的重金属都被固定在安全水平,并且可用于工程应用,例如填充材料。

更新日期:2015-09-29
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