Qian Guangren, Yang Xiaoyan, Dong Shixiang, Zhou Jizhi, Sun Ying, Xu Yunfeng, Liu Qiang
School of Environmental Engineering, Shanghai University, Shanghai, PR China.
J Hazard Mater. 2009 Jun 15;165(1-3):955-60. doi: 10.1016/j.jhazmat.2008.10.078. Epub 2008 Oct 28.
This work investigated the feasibility and effectiveness of MSWI fly ash-based Friedel matrices on stabilizing/solidifying industrial chromium-bearing electroplating sludge using MSWI fly ash as the main raw material with a small addition of active aluminum. The compressive strength, leaching behavior and chemical speciation of heavy metals and hydration phases of matrices were characterized by TCLP, XRD, FTIR and other experimental methods. The results revealed that MSWI fly ash-based Friedel matrices could effectively stabilize chromium-bearing electroplating sludge, the formed ettringite and Friedel phases played a significant role in the fixation of heavy metals in electroplating sludge. The co-disposal of chromium-bearing electroplating sludge and MSWI fly ash-based Friedel matrices with a small addition of active aluminum is promising to be an effective way of stabilizing chromium-bearing electroplating sludge.
本研究以城市固体废弃物焚烧（MSWI）飞灰为主要原料，添加少量活性铝，探讨了基于MSWI飞灰的弗里德尔盐基质对工业含铬电镀污泥进行稳定化/固化处理的可行性和有效性。通过TCLP、XRD、FTIR等实验方法对基质的抗压强度、重金属浸出行为、化学形态以及水化相进行了表征。结果表明，基于MSWI飞灰的弗里德尔盐基质能够有效地稳定含铬电镀污泥，生成的钙矾石和弗里德尔盐相在电镀污泥中重金属的固定方面发挥了重要作用。含铬电镀污泥与添加少量活性铝的基于MSWI飞灰的弗里德尔盐基质共同处置有望成为稳定含铬电镀污泥的有效方法。
