在不同反应时间和反应温度条件下对城市固体废物焚烧(MSWI)飞灰进行碳酸化处理.利用XRD、SEM、热重、ICP-MS对碳酸化产物进行分析,同时对碳酸化产物中重金属的浸出特性进行评价.实验结果表明,碳酸化之后,飞灰中的Ca(OH)2和CaClOH消失,CaCO3增加;增加反应时间,飞灰碳酸化程度加强;反应温度从30℃升高到90℃,飞灰CO2的吸收量增加迅速,继续升高温度,CO2吸收量增加趋缓,固碳量由33 L/kg增加到48 L/kg. MSWI飞灰碳酸化后,重金属Pb的浸出浓度由8425 μg/L下降到大约1μg/L,Cr的浸出浓度由284 μg/L下降到60 μg/L,Zn、Co、Ni、Cu和As的浸出量也有不同程度降低.
参考文献
| [1] | Investigation of accelerated and natural carbonation of MSWI fly ash with a high content of Ca[J].Journal of hazardous materials,2010(1/3):334. |
| [2] | Jiang Jianguo;Chen Maozhe;Zhang Yan;Xu Xin .Pb Stabilization In Fresh Fly Ash From Municipal Solid Waste Incinerator Using Accelerated Carbonation Technology[J].Journal of hazardous materials,2009(2/3):1046-1051. |
| [3] | Alessandra Polettini;Raffaella Pomi .The leaching behavior of incinerator bottom ash as affected by accelerated ageing[J].Journal of hazardous materials,2004(1/3):209-215. |
| [4] | Jelena Todorovic;Holger Ecke .Demobilisation of critical contaminants in four typical waste-to-energy ashes by carbonation[J].Waste Management,2006(4):430-441. |
| [5] | Giulia Costa;Renato Baciocchi;Alessandra Polettini;Raffaella Pomi;Colin D. Hills;Paula J. Carey .Current status and perspectives of accelerated carbonation processes on municipal waste combustion residues[J].Environmental Monitoring and Assessment: An International Journal,2007(1/3):55-75. |
| [6] | K.M. Allal;J.-C. Dolignier;G. Martin .Reaction mechanism of calcium hydroxide with gaseous hydrogen chloride[J].Oil & gas science and technology,1998(6):871-880. |
| [7] | Ecke H.;Menad N.;Lagerkvist A. .Carbonation of municipal solid waste incineration fly ash and the impact on metal mobility[J].Journal of Environmental Engineering,2003(5):435-440. |
| [8] | Holger Ecke;Nourreddine Menad;Anders Lagerkvist .Treatment-oriented characterization of dry scrubber residue from municipal solid waste incineration[J].Journal of Material Cycles and Waste Management,2002(2):117-126. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%