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Physicochemical and pozzolanic properties of municipal solid waste incineration fly ash with different pretreatments.
Chen, Zhen; Li, Jiang-Shan; Poon, Chi-Sun; Jiang, Wen-Hao; Ma, Zi-Han; Chen, Xin; Lu, Jian-Xin; Dong, Hao-Xin.
Afiliación
  • Chen Z; State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan 430071, China.
  • Li JS; State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan 430071, China. Electronic address: jsli@whrsm.ac.cn.
  • Poon CS; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan 430071, China; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
  • Jiang WH; State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan 430071, China; University of Chinese Academy of Sciences, Beijing 100049, China.
  • Ma ZH; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan 430071, China; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
  • Chen X; State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan 430071, China; University of Chinese Academy of Sciences, Beijing 100049, China.
  • Lu JX; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
  • Dong HX; State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; School of Civil Engineering, Liaoning Technical University, Fuxin 123000, China.
Waste Manag ; 160: 146-155, 2023 Apr 01.
Article en En | MEDLINE | ID: mdl-36827883
Swelling caused by gas generated from municipal solid waste incineration fly ash (MSWIFA) when it is mixed with alkali limits its uses. Besides, the leaching of anion salts and heavy metals contained in MSWIFA poses a high risk to environment. This study presents the feasibility of a one-step alkaline washing, one-step thermal quenching and two-step combination of alkaline washing and thermal quenching pretreatment methods in altering the key properties of MSWIFA for promoting its reusability. It was found that apart from H2(gas), NH3(gas) was also generated during the alkaline washing of the MSWIFA. Besides, pretreatments led to the reduction in particle size, the increase in pore volume and specific surface area of the MSWIFA, as well as the removal of chloride and sulfate anions. All the pretreatment methods were effective in reducing leaching of heavy metals to below levels of nonhazardous waste except Cd and Pb with alkaline washing. Furthermore, both the chemical Frattini test and the mechanical activity index test showed improvement in pozzolanic activities of the MSWIFA after the pretreatments. Overall, the combined pretreatment method was most effective in eliminating gas emission, and reducing leaching of metal ions and anions from the ash, while enhancing the pozzolanic activity of the ash.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Eliminación de Residuos / Metales Pesados Idioma: En Revista: Waste Manag Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Eliminación de Residuos / Metales Pesados Idioma: En Revista: Waste Manag Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos