Effect of Magnesium Ozychloride Cement on Stabilization/Solidification of Sewage Sludge
Solidification/stabilization (S/S) is considered to be a well-established disposal technique to reduce sludge handling and disposal obstacles. In this work, the sewage sludge was solidified at variable proportions with magnesium oxychloride cement (denoted as MOC therinafter) as reagent. The mortar prism samples of 40×40×160 mm in dimension were prepared and hardened for 24 hours at room temperature. Unconfined compressive strength after 10-day curing time, initial and final setting time, X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and toxicity leachability of the samples, were used to characterize the macroscopic and microscopic effects caused by the solidified products on the MOC hydration process. The results revealed that the magnesium hydration of phase 3, phase 5 and other hydration components in CS developed a crystallizing network in the hydrated solidified products, which not only enhanced the strength of CS but also prevented the precipitation of heavy metal ions from CS.
Solidification/stabilization Sewage sludge Magnesium ozychloride cement Compressive strength Heavy metals
Ma Jianli Zhao Youcai Wang Li Wang Jinmei
The State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and The Laboratory of Environmental Science and Engineering School of Environmental Science and Engineer
国际会议
北京
英文
1-5
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）