https://scholars.lib.ntu.edu.tw/handle/123456789/408189
標題: | Leaching of carbonated air pollution control residues using compliance leaching tests | 作者: | He P.-J. Zhang H. Shao L.-M. Lee D.-J. |
公開日期: | 2006 | 卷: | 35 | 期: | 2 | 起(迄)頁: | 442-449 | 來源出版物: | Journal of Environmental Quality | 摘要: | The leaching characteristics of air pollution control (APC) residues collected in Shanghai, China, were compared by performing three compliance leaching tests. These were the standard Chinese method for determining the leaching toxicity of solid waste (GB 5086.1-1997), the USEPA's Toxicity Characteristic Leaching Procedure (TCLP), and the new European shake test (EN 12457-3). In particular, behaviors of raw samples and samples that had been subjected to natural aging were compared. Both the leaching tests and natural aging substantially affected the leaching results concerning the APC residue samples. Most importantly, EN and GB tests classified the raw APC residues as hazardous, but the residues passed the TCLP test as non-hazardous. After it had been naturally aged for 720 h, however, the aged sample was classified as hazardous by the TCLP and EN tests, but as nonhazardous by the GB test. Metals that are thought to have been immobilized by carbonation were released at pH 6.3. Model calculations based on the geochemical thermodynamic equilibrium model MINTEQA2 revealed that the formation of metal carbonates did not correspond to the noted change in the leaching behaviors in the three leaching tests. Rather, the partial neutralization of alkaline ash by dissolved CO2 changing the final pH of the leachate dominated the leaching characteristics. The leaching results showed a change in leachate pH. ? ASA, CSSA, SSSA. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408189 | ISSN: | 00472425 | DOI: | 10.2134/jeq2005.0312 | SDG/關鍵字: | Carbonation; Leaching; Mathematical models; Solid wastes; Thermodynamic properties; Toxicity; Alkaline ash; Toxicity Characteristic Leaching Procedure (TCLP); Air pollution control; carbon dioxide; carbonic acid derivative; metal; air pollution control; article; ash; China; geochemistry; hazardous waste; intermethod comparison; leaching; model; pH; solid waste; thermodynamics; Acetic Acid; Air Pollution; Carbonates; China; Environmental Pollutants; Hydrogen-Ion Concentration; Incineration; Industrial Waste; Metals, Heavy; Models, Theoretical; Nitric Acid; Rain; Water |
顯示於: | 化學工程學系 |
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