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Formation and toxicity of polycyclic aromatic hydrocarbons during CaO assisted hydrothermal carbonization of swine manure
Lang, Qianqian; Zhang, Bo; Li, Yi; Liu, Zhengang; Jiao, Wentao
2019-12-01
Source PublicationWASTE MANAGEMENT
ISSN0956-053X
Volume100Pages:84-90
AbstractThe effects of temperature and Ca0 introduction on polycyclic aromatic hydrocarbons (PAHs) contents, distribution patterns and toxicity of the products from hydrothermal carbonization (HTC) of swine manure (SM) were investigated in this study for the first time. The results indicated that increasing temperature decreased total PAHs content of the hydrochar, while the PAHs toxicity firstly decreased and then increased during HTC of SM. For the aqueous product, the total PAHs content and toxicity gradually decreased with increasing temperature. CaO introduction during HTC of SM significantly suppressed the PAHs formation and promoted the transformation from higher molecular weight PAHs into lower molecular weight PAHs in HTC products, resulting in the remarkably decreased content and toxicity of PAHs. The lowest total PAHs content (1428.57 mu g/kg) and TEQ value (21.33 mu g/kg) of the hydrochar were obtained by 15% CaO introduction at 200 degrees C and 180 degrees C, respectively, and compared to SM, they were decreased by 73.73% and 79.51%, respectively. Moreover, 3-ring PAHs were the predominant PAHs in HTC products regardless of CaO introduction. The present study demonstrated that CaO assisted HTC at temperature lower than 220 degrees C was effective to reduce the total content and toxicity of PAHs in SM, and the prepared hydrochar was a promising soil amendment in view of the elimination of PAHs toxicity. (C) 2019 Elsevier Ltd. All rights reserved.
Department固体废弃物处理与资源化实验室
KeywordHydrothermal carbonization Swine manure CaO introduction Polycyclic aromatic hydrocarbons Soil amendment
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43170
Collection固体废弃物处理与资源化实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Shandong Prov Environm Technol Serv Ctr, Jinan 250102, Shandong, Peoples R China
Recommended Citation
GB/T 7714
Lang, Qianqian,Zhang, Bo,Li, Yi,et al. Formation and toxicity of polycyclic aromatic hydrocarbons during CaO assisted hydrothermal carbonization of swine manure[J]. WASTE MANAGEMENT,2019,100:84-90.
APA Lang, Qianqian,Zhang, Bo,Li, Yi,Liu, Zhengang,&Jiao, Wentao.(2019).Formation and toxicity of polycyclic aromatic hydrocarbons during CaO assisted hydrothermal carbonization of swine manure.WASTE MANAGEMENT,100,84-90.
MLA Lang, Qianqian,et al."Formation and toxicity of polycyclic aromatic hydrocarbons during CaO assisted hydrothermal carbonization of swine manure".WASTE MANAGEMENT 100(2019):84-90.
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