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Characteristic and Leaching Behavior of Heavy Metals from Municipal Solid Wastes Incineration (MSWI) Fly Ash in Chongqing, China

机译:重庆市政固体废弃物焚烧(MSWI)粉煤灰的特性和浸出行为

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Abstract-An investigation was conducted on the characteristics and leaching behavior of heavy metals from municipal solid wastes incineration (MSWI) fly ash in Chongqing, China. Results indicated that the average particle size of the fly ash was 36.4 μm, the large particles were formed mainly by small particles' adsorption or aggregation. The total content of the main heavy metals was about 1.04% of the fly ash, among which the contents of Zn, Pb, Mn and Cr were relatively high. Leaching concentrations of heavy metals in fly ash were influenced by the leaching procedure. The leaching concentrations of the heavy metals in fly ash determined by GB5085.3-2007 were all under the national standard limits. However, the leaching concentrations of Pb and Cd were 5.75 and 1.89 mg?kg-1, respectively, both beyond the TCLP limits.
机译:摘要对中国重庆市的市政固体废物焚烧(MSWI)粉煤灰的重金属特征和浸出行为进行了调查。结果表明,粉煤灰的平均粒径为36.4μm,大颗粒主要由小颗粒的吸附或聚集形成。主要重金属的总含量为粉煤灰的1.04%,其中Zn,Pb,Mn和Cr的含量相对较高。粉煤灰中重金属的浸出浓度受到浸出程序的影响。粉煤灰中重金属的浸出浓度由GB5085.3-2007确定全国标准限制。然而,Pb和Cd的浸出浓度分别为5.75和1.89mg?KG-1,无论是超出TCLP限制。

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