Co-pyrolysis with pine sawdust reduces the environmental risks of copper and zinc in dredged sediment and improves its adsorption capacity for cadmium
文献类型：期刊论文
| 作者 | Liu, Qunqun; Sheng, Yanqing ; Wang, Zheng
|
| 刊名 | JOURNAL OF ENVIRONMENTAL MANAGEMENT
 |
| 出版日期 | 2023-05-15 |
| 卷号 | 334页码:12 |
| ISSN号 | 0301-4797 |
| 关键词 | Dredged sediment Heavy metal stabilization Co -pyrolysis Ecological risk Adsorption |
| DOI | 10.1016/j.jenvman.2023.117502 |
| 通讯作者 | Sheng, Yanqing(yqsheng@yic.ac.cn) |
| 英文摘要 | Proper treatment of heavy metal-contaminated dredged sediment (DS) is crucial to avoid secondary pollution. Effective and sustainable technologies are desired for the treatment of Zn-and Cu-contaminated DS. Due to the advantages of low energy consumption and time saving, co-pyrolysis technology was innovatively applied to treat Cu-and Zn-polluted DS in this study, and the effects of the co-pyrolysis conditions on Cu and Zn stabili-zation efficiencies, potential stabilization mechanisms, and the possibility for resource utilization of co-pyrolysis product were also investigated. The results showed that pine sawdust is an appropriate co-pyrolysis biomass for the stabilization of Cu and Zn based on the leaching toxicity analysis. The ecological risks of Cu and Zn in DS were reduced after co-pyrolysis treatment. The total concentrations of Zn and Cu in co-pyrolysis products were decreased by 5.87%-53.45% and 8.61%-57.45% of that in DS before co-pyrolysis. However, the total concen-trations of Zn and Cu in DS remained basically unchanged after co-pyrolysis, which indicating the decreases in total concentrations of Zn and Cu in co-pyrolysis products were mainly related to dilution effect. Fraction analysis indicated that co-pyrolysis treatment contributed to transforming weakly bound Cu and Zn into stable fractions. The co-pyrolysis temperature and mass ratio of pine sawdust/DS had a greater influence than co -pyrolysis time on the fraction transformation of Cu and Zn. The leaching toxicity of Zn and Cu from the co -pyrolysis products was eliminated when the co-pyrolysis temperature reached 600 and 800 degrees C, respectively. Analysis of the X-ray photoelectron spectroscopy and X-ray diffraction results demonstrated that co-pyrolysis treatment could transform mobile Cu and Zn in DS into metal oxides, metal sulfides, phosphate compounds, etc. Batch adsorption procedures suggested that the co-pyrolysis product possessed a high adsorption capacity for Cd (95.70 mg/g at 318 K). The formation of CdCO3 precipitates and the complexation effects of oxygen -containing functional groups were the principal adsorption mechanisms of the co-pyrolysis product. Overall, this study provides new insights into sustainable disposal and resource utilization for heavy metal-contaminated DS. |
| WOS关键词 | HEAVY-METALS ; CD ; STABILIZATION ; TRANSFORMATION ; SULFUR |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000992013400001 |
| 资助机构 | Shandong Provincial Natural Science Foundation ; Special Research Assistant Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| 源URL | [http://ir.yic.ac.cn/handle/133337/32911]  |
| 专题 | 烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室 烟台海岸带研究所_山东省海岸带环境工程技术研究中心 |
| 通讯作者 | Sheng, Yanqing |
| 作者单位 | Chinese Acad Sci, Yantai Inst Coastal Zone Res, Res Ctr Coastal Environm Engn Technol Shandong Pro, Yantai 264003, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Qunqun,Sheng, Yanqing,Wang, Zheng. Co-pyrolysis with pine sawdust reduces the environmental risks of copper and zinc in dredged sediment and improves its adsorption capacity for cadmium[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2023,334:12. |
| APA | Liu, Qunqun,Sheng, Yanqing,&Wang, Zheng.(2023).Co-pyrolysis with pine sawdust reduces the environmental risks of copper and zinc in dredged sediment and improves its adsorption capacity for cadmium.JOURNAL OF ENVIRONMENTAL MANAGEMENT,334,12. |
| MLA | Liu, Qunqun,et al."Co-pyrolysis with pine sawdust reduces the environmental risks of copper and zinc in dredged sediment and improves its adsorption capacity for cadmium".JOURNAL OF ENVIRONMENTAL MANAGEMENT 334(2023):12. |
入库方式： OAI收割
来源：烟台海岸带研究所
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