Distribution and toxicity of polycyclic aromatic hydrocarbons during CaO-assisted hydrothermal carbonization of sewage sludge
文献类型：期刊论文
| 作者 | Liu, Tingting; Tian, Lifeng; Liu, Zhengang; He, Jie ; Fu, Haihui; Huang, Qifei; Xue, Honghai; Huang, Zechun
|
| 刊名 | WASTE MANAGEMENT
 |
| 出版日期 | 2021-02-01 |
| 卷号 | 120页码:616-625 |
| 关键词 | Sewage sludge Hydrothermal carbonization CaO Hydrochar Polycyclic aromatic hydrocarbons Soil conditioner |
| ISSN号 | 0956-053X |
| 英文摘要 | Hydrothermal carbonization (HTC) of sewage sludge (SS) with and without calcium oxide (CaO) introduction was conducted at 160-240 degrees C, and the yield and distribution of polycyclic aromatic hydrocarbons (PAHs) were evaluated for the first time. PAHs (2972.99 mu g/kg) and toxic equivalent quantity (TEQ) (373.09 mu g/kg) yields in SS decreased by 13.61% and 14.65%, respectively, after treatment at 160 degrees C and substantially increased as temperatures increased. More PAHs were distributed in the hydrochar than in the aqueous products. Hydrochar yields decreased linearly with temperature, thus increasing PAH concentration in hydrochar; 6221.98 mu g/kg of PAHs in hydrocar at 240 degrees C exceeded agricultural use standard limits. PAH and TEQ yields at 200 degrees C decreased by 5.55-15.98% and 2.88-3.54%, respectively, when 3-9% CaO was added, which could be ascribed to CaO inhibition in the free radical reaction for PAH generation. Additionally, 6% CaO addition substantially weakened the acceleration effect of high temperatures on PAH formation; the decrease of PAH yield at 240 degrees C was 22.14%, which is higher than that at other temperatures. Consequently, the PAH concentration in hydrochar declined by 2.33-22.37%. PAH content in hydrochar obtained from CaO-assisted HTC of SS fell within agriculture use standard limit and exhibits potential for use as a soil conditioner. However, condition with a CaO amount of 15% would significantly increase TEQ yields. Considering both PAH and TEQ yields and the ecological risks of PAHs in hydrochar derived from HTC of SS, the appropriate reaction conditions were found to be 200 degrees C with 3-6% added CaO. (C) 2020 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Engineering, Environmental ; Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45631]  |
| 专题 | 生态环境研究中心_固体废弃物处理与资源化实验室 |
| 作者单位 | 1.Jilin Jianzhu Univ, Key Lab Songliao Aquat Environm, Minist Educ, Changchun 130118, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 3.Chinese Acad Sci, Technol Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China 4.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China 5.Chinese Res Inst Environm Sci, Res Inst Solid Waste Management, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Tingting,Tian, Lifeng,Liu, Zhengang,et al. Distribution and toxicity of polycyclic aromatic hydrocarbons during CaO-assisted hydrothermal carbonization of sewage sludge[J]. WASTE MANAGEMENT,2021,120:616-625. |
| APA | Liu, Tingting.,Tian, Lifeng.,Liu, Zhengang.,He, Jie.,Fu, Haihui.,...&Huang, Zechun.(2021).Distribution and toxicity of polycyclic aromatic hydrocarbons during CaO-assisted hydrothermal carbonization of sewage sludge.WASTE MANAGEMENT,120,616-625. |
| MLA | Liu, Tingting,et al."Distribution and toxicity of polycyclic aromatic hydrocarbons during CaO-assisted hydrothermal carbonization of sewage sludge".WASTE MANAGEMENT 120(2021):616-625. |
入库方式： OAI收割
来源：生态环境研究中心
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