| 高钙特征焚烧飞灰的加速碳酸化处理及对重金属浸出特性的影响 | |
| 王雷 ; 金宜英 ; 聂永丰 ; WANG Lei ; JIN Yi-ying ; NIE Yong-feng | |
| 2010-06-10 ; 2010-06-10 | |
| 关键词 | 生活垃圾焚烧飞灰 加速碳酸化 液固比 重金属 XRD SEM-EDS TG/DTA TCLP MSWI fly ash accelerate carbonation L∶S heavy metal XRD SEM-EDS TG/DTA TCLP X701 |
| 其他题名 | Accelerated Carbonation of High Ca Content Municipal Solid Waste Incineration Fly Ash and Impact on Leaching of Heavy Metal |
| 中文摘要 | 针对生活垃圾焚烧飞灰的高钙含量特征,在室温下采用CO2对焚烧飞灰在液固比(L∶S)为0.25∶1的条件下进行加速碳酸化处理,考察加速碳酸化处理对焚烧飞灰中重金属(As、Cd、Cu、Zn、Sb、Pb)浸出特性的影响.焚烧飞灰XRD分析表明,加速碳酸化处理后飞灰中的Ca(OH)2和CaClOH衍射峰消失,而CaCO3的衍射峰增多,且强度增加.加速碳酸化处理后飞灰中铅的形态发生了改变,并且能够检测到铜的化合物.TG/DTA分析表明,焚烧飞灰在440℃之前增重达到5.70%,SEM-EDS分析证实了Ca(OH)2(s)+CO2(g)→CaCO3(s)反应的发生.焚烧飞灰加速碳酸化处理后的TCLP浸出实验表明,碳酸化时间在2 h内,重金属的浸出浓度除Cd保持不变外都显著下降;而当碳酸化时间超过50 h后,重金属的浸出浓度除Pb外普遍高于飞灰未经碳酸化处理时的浸出浓度.; The accelerated carbonation of high Ca content Municipal Solid Waste Incineration(MSWI) fly ash was investigated with an L∶S ratio of 0.25∶1 to study the effect of accelerated carbonation on the leaching of critical heavy metals(As,Cd,Cu,Zn,Sb,Pb) in the fly ash.The results of XRD analysis showed after carbonation the peaks of Ca(OH)_2 and CaClOH disappeared,while the peaks of CaCO_3 became intense.After carbonation,the mineral phase of Pb was changed and Cu compound(CuTi_(2.05)S_4) was identified.The TG/DTA analysis showed the weight gain of the fly ash before 440℃ reached 5.70%.Furthermore,the SEM-EDS analysis confirmed the occurrence of the reaction of(Ca(OH)_2(s))+CO_2(g)→CaCO_3(s).The TCLP test of carbonated fly ash revealed that the leaching concentration of the critical heavy metals,except Cd,decreased within the carbonation time of 2 h.When the carbonation time was longer than 50 h,the leaching concentration of critical heavy metals,except Pb were higher than that of un-carbonated fly ash.; “十一五”国家科技支撑计划项目(2006BAC02A18); 江苏省科技支撑计划-社会发展项目(BE2008611) |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/65272]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 王雷,金宜英,聂永丰,等. 高钙特征焚烧飞灰的加速碳酸化处理及对重金属浸出特性的影响[J],2010, 2010. |
| APA | 王雷,金宜英,聂永丰,WANG Lei,JIN Yi-ying,&NIE Yong-feng.(2010).高钙特征焚烧飞灰的加速碳酸化处理及对重金属浸出特性的影响.. |
| MLA | 王雷,et al."高钙特征焚烧飞灰的加速碳酸化处理及对重金属浸出特性的影响".(2010). |
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