The physicochemical properties of second fly ash and its speciation of Pb and Cu
LI Song1,2, JIA Yan-ping1, ZHANG Lan-he1, WU Hao2, LIU Hong-bo2, WANG Qun-hui3, WANG Qi2, TIAN Shu-lei2,4
1. College of Chemical Engineering, University of Northeast Electric Power, Jilin 132012, China;
2. Institute of Soil and Solid Waste, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
3. College of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;
4. College of Environment, Harbin Institute of Technology, Harbin 150001, China
The physicochemical properties of the second fly ash and its speciation of Pb and Cu were analyzed by using XRF, EDX, XRD on samples of second fly ashes collected under temperature of 1000, 1150 and 1250℃ from high temperature rube furnaces. The results show that second fly ash was mainly composed of heavy metal chloride, and the mass percentages of heavy metals of Pb and Cu were 8.92%~10.11% and 3.74%~5.73%, respectively. The microscopic morphology of second fly ash was irregular shaped polymer and porous cluster flocculation. The second fly ash could absorb moisture easily. The dry second fly ash was brownish-yellow originally, gradually became yellow after absorbing moisture, and finally turned into a paste of blue slurry.
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LI Song, JIA Yan-ping, ZHANG Lan-he, WU Hao, LIU Hong-bo, WANG Qun-hui, WANG Qi, TIAN Shu-lei. The physicochemical properties of second fly ash and its speciation of Pb and Cu. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(4): 1627-1632.
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