Formation and control of dioxins during thermal desorption remediation of chlorine and non-chlorine organic contaminated soil
文献类型：期刊论文
| 作者 | Fu, Jianying; Cai, Pengtao; Zhan, Mingxiu; Xu, Xu; Chen, Tong; Li, Xiaodong; Jiao, Wentao ; Yin, Yongguang
|
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2022-08-15 |
| 卷号 | 436期号:0页码:129124 |
| ISSN号 | 0304-3894 |
| 关键词 | SOLID-WASTE INCINERATORS DIBENZO-P-DIOXINS FLY-ASH PCDD/F FORMATION PARTICLE-SIZE TEMPERATURE PCBS DECOMPOSITION REDUCTION EMISSIONS |
| 英文摘要 | Formation and emission of dioxins is a great concern during thermal desorption remediation of organic contaminated soil. The differential formation of dioxins from chlorine organic contaminated soil (COCS) and non-chlorine organic contaminated soil (NCOCS) is still unclear and the control technique for the dioxins generated is an urgent need. In this study, the formation and distribution characteristics of dioxins were investigated in the thermal desorption unit combined with flue gas purification system during COCS and NCOCS treatments. Although organic contaminates were well desorbed, de-novo formation of dioxins was observed for both COCS and NCOCS, as well as synthesis from precursors for NCOCS. The gas-phase dioxin in the flue gas purification system continuously decreased during NCOCS thermal desorption, while the dioxin concentration in the quench tower sharply increased from 0.46 to 2.13 ng/Nm3 through de-novo synthesis during COCS treatment. Furthermore, the emission of dioxins only slightly reduced (for COCS) or even increased (for NCOCS) at 70% operating load. The catalytic adsorption tower within modified activated carbon and V5-Mo5-Ti catalyst after bag filter can reduce the emission of dioxins up to 91.4% at the condition of secondary combustion chamber closure, demonstrating that the catalytic adsorption tower can replace the secondary combustion chamber for controlling dioxin emission. More importantly, the highly toxic low-chlorinated polychlorinated dibenzodioxins and polychlorinated dibenzofurans (PCDD/PCDFs) were selectively removed from flue gas by the catalytic adsorption tower. These results reveal the differential formation characteristics of dioxins during COCS and NCOCS thermal treatments and highlight V5-Mo5-Ti/ modified activated carbon as a promising catalytic adsorption material to control the emission of dioxins from the thermal desorption of organic contaminated soil. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47759]  |
| 专题 | 生态环境研究中心_土壤环境科学实验室 |
| 通讯作者 | Zhan, Mingxiu |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Haidian Dist, Beijing 100085, Peoples R China 2.Zhejiang Univ, Inst Thermal Power Engn, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China 3.China Jiliang Univ, Coll Metrol & Measurement Engn, Hangzhou 310018, Zhejiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fu, Jianying,Cai, Pengtao,Zhan, Mingxiu,et al. Formation and control of dioxins during thermal desorption remediation of chlorine and non-chlorine organic contaminated soil[J]. JOURNAL OF HAZARDOUS MATERIALS,2022,436(0):129124. |
| APA | Fu, Jianying.,Cai, Pengtao.,Zhan, Mingxiu.,Xu, Xu.,Chen, Tong.,...&Yin, Yongguang.(2022).Formation and control of dioxins during thermal desorption remediation of chlorine and non-chlorine organic contaminated soil.JOURNAL OF HAZARDOUS MATERIALS,436(0),129124. |
| MLA | Fu, Jianying,et al."Formation and control of dioxins during thermal desorption remediation of chlorine and non-chlorine organic contaminated soil".JOURNAL OF HAZARDOUS MATERIALS 436.0(2022):129124. |
入库方式： OAI收割
来源：生态环境研究中心
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