| Formation and control of dioxins during thermal desorption remediation of chlorine and non-chlorine organic contaminated soil | |
Fu, Jianying; Cai, Pengtao; Zhan, Mingxiu; Xu, Xu; Chen, Tong; Li, Xiaodong; Jiao, Wentao ; Yin, Yongguang
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| 2022-08-15 | |
| Source Publication | JOURNAL OF HAZARDOUS MATERIALS
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| ISSN | 0304-3894 |
| Volume | 436Issue:0Pages:129124 |
| Abstract | 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. |
| Department | 土壤环境科学与技术实验室;环境纳米技术与健康效应重点实验室 ; 土壤环境科学与技术实验室;环境纳米技术与健康效应重点实验室 |
| Keyword | SOLID-WASTE INCINERATORS DIBENZO-P-DIOXINS FLY-ASH PCDD/F FORMATION PARTICLE-SIZE TEMPERATURE PCBS DECOMPOSITION REDUCTION EMISSIONS |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47759 |
| Collection | 土壤环境科学实验室 |
| Corresponding Author | Zhan, Mingxiu |
| Affiliation | 1.Zhejiang Univ, Inst Thermal Power Engn, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China 2.China Jiliang Univ, Coll Metrol & Measurement Engn, Hangzhou 310018, Zhejiang, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Haidian Dist, Beijing 100085, Peoples R China |
| Recommended Citation 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. |
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| Formation and contro（4842KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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