التفاصيل البيبلوغرافية
| العنوان: |
Characteristics of heavy metal migration during pyrolysis of typical oily wastes and environmental risk assessment of pyrolysis residues. |
| المؤلفون: |
Wang, Lili1 (AUTHOR) wanglili@nies.org, Tu, Haifeng1 (AUTHOR), Zhang, Houhu1 (AUTHOR), Liang, Lichen1 (AUTHOR), Jiang, Hao1 (AUTHOR), Wang, Dan1 (AUTHOR), Yan, Xiaofei1 (AUTHOR), Xu, Yuanshun1 (AUTHOR) xuyuanshun@nies.org |
| المصدر: |
Waste Management. Jun2024, Vol. 183, p174-183. 10p. |
| مصطلحات موضوعية: |
*HEAVY metals, *ENVIRONMENTAL risk assessment, *LUNGS, *POISONS, *PYROLYSIS, *COPPER, *POROSITY |
| مصطلحات جغرافية: |
XINJIANG Uygur Zizhiqu (China) |
| مستخلص: |
• OS-P formed more amorphous charcoal-like graphite microcrystalline structure at 600℃. • The pyrolysis treatment could make the speciation of heavy metals more stabilized. • The environmental risks and ecological safety of OS-P are controllable. • OS-P can be considered as agricultural sludge. Solid-phase residues from pyrolysis of oily wastes (OS) are widely used due to their rich pore structure and strong adsorption capacity. In this study, pyrolysis residues (OS-P) were obtained from the pyrolysis treatment of four typical OS in Karamay, Xinjiang. The results indicate that the crystalline substances in OS-P mainly were SiO 2 , BaSO 4 , and graphite. The heavy metals of OS-P were higher than that of OS in the following order: Zn > Cu > Ni > Cr > Pb > Cd. The results of the improvement of Community Bureau of Reference (BCR) sequential extraction showed that the proportion of Cu, Ni and Cr in OS1-P in the residual fraction was higher than that of the other three OS. The residual fraction of Cu, Ni, and Cr in OS1-P increased from 16.0 %, 30.0 %, and 11.0 % to 66.1 %, 81.9 %, and 89.2 %, respectively. After pyrolysis treatment, the leaching concentration of heavy metals in the residue was reduced. Referring to the requirements for heavy metal control limits (GB 4284–2018), all heavy metals in OS-P showed low risk. Their potential ecological risk indices were 4.11, 3.13, 4.87 and 5.35, respectively, indicating that the potential ecological hazards of heavy metals from OS-P were slight. There was no significant effect on the histopathological changes of kidney, lung, liver, ovary and testis of mice, showing that the rational use of OS-P in production will not produce toxic effects on target animals. Based on risk assessment and safety evaluation, the application of OS-P is controllable, safe and reliable for resource utilization. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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