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  • Title: Nondestructive characterization of the contaminated biodegradable fraction of municipal solid waste using synchrotron radiation-induced micro-X-ray fluorescence.
    Author: Wu J, Zhang H, Shao LM, He PJ.
    Journal: Bioresour Technol; 2013 Mar; 132():239-43. PubMed ID: 23411454.
    Abstract:
    Synchrotron radiation-induced micro-X-ray fluorescence (SR-μXRF) was employed to elucidate the elemental characteristics of contaminated biodegradable fraction of municipal solid waste (BFMSW). Six sectioned BFMSW samples were selected for SR-μXRF mapping and 50 individual fine particles sorbed onto BFMSW were analyzed using SR-μXRF point scanning. The results showed that heavy metals tended to be concentrated on the surface of BFMSW and highly localized to some "hot-spots". Marked differences in heavy metal sequestering potentials among various kinds of BFMSW, and the significant role of heavy metal "hot-spots" in BFMSW contamination were identified. The lower heavy metal levels in the simulated samples compared to field samples (with longer and more intense mixing) indicated that inter-contamination during waste handling contributed significantly to heavy metal accumulation in BFMSW. Furthermore, additional information regarding elemental characteristics of individual particles could be acquired using SR-μXRF.
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