| Insights into metals in individual fine particles from municipal solid waste using synchrotron radiation-based micro-analytical techniques |
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| 作者姓名： | Yumin Zhu Hua Zhang Liming Shao Pinjing He |
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| 作者单位： | State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China;Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, China;State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China;Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, China;Research and Training Center on Rural Waste Management, Ministry of Housing and Urban-Rural Development of P.R. China, Shanghai 200092, China;Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, China;Research and Training Center on Rural Waste Management, Ministry of Housing and Urban-Rural Development of P.R. China, Shanghai 200092, China |
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| 基金项目： | This work was supported by the National Basic Research Program of China (No. 2011CB201500), the National Social Science Fund of China (No. 12&ZD236), and the National Natural Science Foundation of China (No. 21277096). The μ-XRF images and μ-XRD patterns were obtained at the BL15U1 beam line of the Shanghai Synchrotron Radiation Facility (SSRF) in China. |
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| 摘 要： | Excessive inter-contamination with heavy metals hampers the application of biological treatment products derived from mixed or mechanically-sorted municipal solid waste (MSW). In this study, we investigated fine particles of < 2 mm, which are small fractions in MSW but constitute a significant component of the total heavy metal content, using bulk detection techniques. A total of 17 individual fine particles were evaluated using synchrotron radiation-based micro-X-ray fluorescence and micro-X-ray diffraction. We also discussed the association, speciation and source apportionment of heavy metals. Metals were found to exist in a diffuse distribution with heterogeneous intensities and intense hot-spots of < 10 μm within the fine particles. Zn-Cu, Pb-Fe and Fe-Mn-Cr had significant correlations in terms of spatial distribution. The overlapped enrichment, spatial association, and the mineral phases of metals revealed the potential sources of fine particles from size-reduced waste fractions (such as scraps of organic wastes or ceramics) or from the importation of other particles. The diverse sources of heavy metal pollutants within the fine particles suggested that separate collection and treatment of the biodegradable waste fraction (such as food waste) is a preferable means of facilitating the beneficial utilization of the stabilized products.
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| 关 键 词： | Municipal solid waste Fine particle Synchrotron radiation Micro-analytical technique Metal |
| 收稿时间： | 21 February 2014 |
| 修稿时间： | 10 May 2014 |
Insights into metals in individual fine particles from municipal solid waste using synchrotron radiation-based micro-analytical techniques |
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| Yumin Zhu,Hua Zhang,Liming Shao,Pinjing He.Insights into metals in individual fine particles from municipal solid waste using synchrotron radiation-based micro-analytical techniques[J].Journal of Environmental Sciences |
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| Authors: | Yumin Zhu Hua Zhang Liming Shao and Pinjing He |
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| Institution: | State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China;Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, China;State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China;Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, China;Research and Training Center on Rural Waste Management, Ministry of Housing and Urban-Rural Development of P.R. China, Shanghai 200092, China;Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, China;Research and Training Center on Rural Waste Management, Ministry of Housing and Urban-Rural Development of P.R. China, Shanghai 200092, China |
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| Abstract: | Excessive inter-contamination with heavy metals hampers the application of biological treatment products derived from mixed or mechanically-sorted municipal solid waste (MSW). In this study, we investigated fine particles of < 2 mm, which are small fractions in MSW but constitute a significant component of the total heavy metal content, using bulk detection techniques. A total of 17 individual fine particles were evaluated using synchrotron radiation-based micro-X-ray fluorescence and micro-X-ray diffraction. We also discussed the association, speciation and source apportionment of heavy metals. Metals were found to exist in a diffuse distribution with heterogeneous intensities and intense hot-spots of < 10 μm within the fine particles. Zn–Cu, Pb–Fe and Fe–Mn–Cr had significant correlations in terms of spatial distribution. The overlapped enrichment, spatial association, and the mineral phases of metals revealed the potential sources of fine particles from size-reduced waste fractions (such as scraps of organic wastes or ceramics) or from the importation of other particles. The diverse sources of heavy metal pollutants within the fine particles suggested that separate collection and treatment of the biodegradable waste fraction (such as food waste) is a preferable means of facilitating the beneficial utilization of the stabilized products. |
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| Keywords: | Municipal solid waste Fine particle Synchrotron radiation Micro-analytical technique Metal |
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