title: Nondestructive characterization of the contaminated biodegradable fraction of municipal solid waste using synchrotron radiation-induced micro-X-ray fluorescence.
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.
authors: State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China.
authors: Jun
authors: J
authors: Wu
authors: Hua
authors: H
authors: Zhang
authors: Li-Ming
authors: LM
authors: Shao
authors: Pin-Jing
authors: PJ
authors: He
mesh_terms: D002681:China; D019216:Metals, Heavy / Q000032:analysis*; D025341:Principal Component Analysis; D012037:Refuse Disposal / Q000379:methods*; D012987:Soil / Q000032:analysis*; D062611:Solid Waste / Q000032:analysis*; D013052:Spectrometry, X-Ray Emission; D017356:Synchrotrons
chemical_list: D019216:Metals, Heavy; D012987:Soil; D062611:Solid Waste