The influence of a washing pretreatment containing phosphate anions on single-mode microwave-based detoxification of fly ash from municipal solid waste incinerators
文献类型：期刊论文
| 作者 | Ju, Yongming; Zhang, Kairu; Yang, Tiantian; Deng, Dongyang; Qiao, Junqin; Wang, Pu; You, Yan; Du, Ling; Chen, Guihua; Kolodynska, Dorota |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2020-05-01 |
| 卷号 | 387页码:1-10 |
| 关键词 | Fly ash Phosphate anions Dioxin inhibitor Hagenmaler reactions Hot spots Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) |
| ISSN号 | 1385-8947 |
| 英文摘要 | Presently, control of the environmental risk posed by fly ash from municipal solid waste incinerators (MSWIs) urgently requires novel strategies to stabilize targeted heavy metals (HMs), detoxify toxic organic pollutants and separate residue alkali metal chlorides. In this study, a washing pretreatment containing phosphate (P) anions was adopted to stabilize HMs, and the main influencing factors as well as the thermodynamics were investigated. The results show that the adsorption process fits well with the Langmuir model, giving a maximal adsorption capacity of 114.35 mg P g(-1) with a preferred liquid-to-solid ratio of 2.5 L g(-1); the thermodynamics equation indicated that this was a spontaneous, endothermic and entropy-increasing process. Moreover, wet fly ash absorbed with P anions was further irradiated with single-mode microwave (MW) energy. The results show that under the preferred conditions of a mass ratio of SiC to wet fly of 10:2, temperature of similar to 480 degrees C and N-2 atmosphere, similar to 99.1% of the total PCDD/Fs were efficiently degraded, accompanied by a residual toxicity equivalent of 13.0 ng I-TEQ/kg. Notably, the presence of thiourea (TU) shortened the MW irradiation time by 27.8%-61.5% compared with the absence of TU and enhanced the generation of hot spots. Furthermore, the principal parameters of MW-based Hagenmaler reactions apparently demonstrate significant difference with traditional heating-based Hagenmaler reactions mainly including the pyrolysis temperature over the range of 200-450 degrees C, an inert atmosphere and at least 1 h of residue time. Accordingly, this study provides a promising alternative strategy to stabilize HMs and detoxify organic pollutants, accompanied with a separation of residue alkali metal chlorides. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44826]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Ju, Yongming,Zhang, Kairu,Yang, Tiantian,et al. The influence of a washing pretreatment containing phosphate anions on single-mode microwave-based detoxification of fly ash from municipal solid waste incinerators[J]. CHEMICAL ENGINEERING JOURNAL,2020,387:1-10. |
| APA | Ju, Yongming.,Zhang, Kairu.,Yang, Tiantian.,Deng, Dongyang.,Qiao, Junqin.,...&Dionysiou, Dionysios D..(2020).The influence of a washing pretreatment containing phosphate anions on single-mode microwave-based detoxification of fly ash from municipal solid waste incinerators.CHEMICAL ENGINEERING JOURNAL,387,1-10. |
| MLA | Ju, Yongming,et al."The influence of a washing pretreatment containing phosphate anions on single-mode microwave-based detoxification of fly ash from municipal solid waste incinerators".CHEMICAL ENGINEERING JOURNAL 387(2020):1-10. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。