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Characterization of metal concentration, heavy metal elution, and desalination behavior of municipal solid waste incineration bottom and grate sifting deposition ash based on particle size
Journal of Material Cycles and Waste Management ( IF 2.7 ) Pub Date : 2020-11-18 , DOI: 10.1007/s10163-020-01136-w
Shigenori Iino , Sukehisa Tatsuichi , Kentaro Miyawaki

Resource and environmental safety protocols of incineration residues were evaluated by analyzing the metal concentration, heavy metal elution, desalination behavior, and chlorine removal ratio owing to particle size differences between bottom ash (BA) and grate sifting deposition ash (GA). In the total content test, Cl, Zn, and Cr in the incinerator BA exceeded the cement acceptance standard (Cl: 1000 mg/kg; Zn: 1700 mg/kg, and Cr: 170 mg/kg) at almost all of the particle sizes, while Au, Ag, Pd, and Zn had high contents in the GA. When using BA as a construction material, heavy metal elution values and contents are restricted as per the product quality standards based on the Japanese soil pollution control law. Lead within the BA and GA exceeded the standard values for most particle sizes. We predicted that there would be a limit on the elution of K by only washing with water. The removal ratio of total chlorine by particle size was approximately 20–70%, where the effect of the particle size on the removal ratio was small, suggesting that the elution of chlorine was complete in approximately 6 hours. These results contribute to information on the recycling of BA and GA.



中文翻译:

基于粒径的城市固体废物焚烧炉底和炉排筛分沉积灰分的金属浓度,重金属洗脱和脱盐行为的表征

通过分析由于底灰(BA)和炉排筛分沉积灰(GA)之间的粒径差异而导致的金属浓度,重金属洗脱,脱盐行为和氯去除率,评估了焚烧残渣的资源和环境安全方案。在总含量测试中,焚烧炉BA中的Cl,Zn和Cr几乎在所有颗粒上都超过了水泥的接受标准(Cl:1000 mg / kg; Zn:1700 mg / kg,Cr:170 mg / kg)。尺寸中,Au,Ag,Pd和Zn在GA中含量较高。当使用BA作为建筑材料时,根据日本土壤污染控制法的产品质量标准,重金属的溶出值和含量受到限制。BA和GA中的铅超过了大多数粒径的标准值。我们预测仅用水洗涤就可以限制K的洗脱。总氯的去除率(按粒度计算)约为20-70%,其中粒度对去除率的影响很小,这表明氯的洗脱时间约为6小时。这些结果有助于获得BA和GA的回收信息。

更新日期:2020-11-18
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