Synthesis and efficiency of a new chemical fixation agent for stabilizing MSWI fly ash.
In this study, a novel chemical fixation agent, colloidal aluminate oxide (CAO), has been synthesized and characterized in detail. CAO does not require cementitious additives, and can be used as a stabilizer of lead in the fly ash from municipal solid waste incineration (MSWI) plants. CAO reveals a high reduction ratio for the leachability of Pb of 94.8% when compared with three commercial fixation agents, MF-103, BTS-03 and POCAT, and two fine chemicals, ethylene diaminetetracetic acid (EDTA) and thiodiglycolic acid (TGA). A possible mechanism for CAO stabilization of lead is formulated based on the results of Fourier-transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) spectra.
Huang
Wu-Jang
WJ
Department of Environmental Science and Engineering, National Ping-Tun University of Science and Technology, 91201 Ping-Tun, Taiwan. wjhuang@mail.npust.edu.tw
Lo
Jui-Shih
JS
D000537:Aluminum Oxide / Q000138:chemical synthesis*; D002244:Carbon / Q000737:chemistry*; D002614:Chelating Agents / Q000737:chemistry; D060729:Coal Ash; D003102:Colloids; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000737:chemistry; D052638:Particulate Matter; D012037:Refuse Disposal / Q000295:instrumentation* / Q000379:methods*
D002614:Chelating Agents; D060729:Coal Ash; D003102:Colloids; D019216:Metals, Heavy; D052638:Particulate Matter; D002244:Carbon; D000537:Aluminum Oxide