Effects of sulfur on lead partitioning during sludge incineration based on experiments and thermodynamic calculations
| Autor: | Jingyong Liu, Yujie Wang, Zhongxu Zhuo, Tao Chen, Guang-qian Luo, Wuming Xie, Xiao-ming Li, Xun-an Ning, Rui-zhe He, Shu-jie Huang, Shuiyu Sun, Jiewen Fu |
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| Rok vydání: | 2015 |
| Předmět: |
China
Flue gas Inorganic chemistry chemistry.chemical_element Incineration Combustion Coal Ash chemistry.chemical_compound Waste Management Lead sulfide Cities Waste Management and Disposal Volatilisation Sewage Sulfur Compounds Chemistry Models Theoretical Sludge incineration Sulfur Refuse Disposal Lead Fly ash Bottom ash Thermodynamics Volatilization |
| Zdroj: | Waste Management. 38:336-348 |
| ISSN: | 0956-053X |
| DOI: | 10.1016/j.wasman.2014.11.021 |
| Popis: | Experiments in a tubular furnace reactor and thermodynamic equilibrium calculations were conducted to investigate the impact of sulfur compounds on the migration of lead (Pb) during sludge incineration. Representative samples of typical sludge with and without the addition of sulfur compounds were combusted at 850 °C, and the partitioning of Pb in the solid phase (bottom ash) and gas phase (fly ash and flue gas) was quantified. The results indicate that three types of sulfur compounds (S, Na2S and Na2SO4) added to the sludge could facilitate the volatilization of Pb in the gas phase (fly ash and flue gas) into metal sulfates displacing its sulfides and some of its oxides. The effect of promoting Pb volatilization by adding Na2SO4 and Na2S was superior to that of the addition of S. In bottom ash, different metallic sulfides were found in the forms of lead sulfide, aluminosilicate minerals, and polymetallic-sulfides, which were minimally volatilized. The chemical equilibrium calculations indicated that sulfur stabilizes Pb in the form of PbSO4(s) at low temperatures ( |
| Databáze: | OpenAIRE |
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