Abstract
Source characterization of heavy metals is prerequisite to assessing their potential contamination pathways and environmental risks, based on which pollution control and environmental remediation measures can be properly targeted. In the present study, recent progress in methodologies of source identification of heavy metals in solid waste are summarized. The key scientific concerns related to these methodologies based on the total contents, chemical speciation, isotopic composition, and single-particle signature are also discussed. Finally, prospective research with regard to source identification of heavy metals in solid waste is discussed according to current research conditions and progress.
Highlights
Source characterization of heavy metals is prerequisite to assessing their potential contamination pathways and environmental risks, based on which pollution control and environmental remediation measures can be properly targeted
The key scientific concerns related to these methodologies based on the total contents, chemical speciation, isotopic composition, and single-particle signature are discussed
Traditional source identification of heavy metals (HMs) is conducted based on pollution levels in solid waste using multivariate statistical analysis (MSA) and/or geographic information system (GIS) techniques
Summary
SPECIAL TOPICS: Review of source identification methodologies for heavy metals in solid waste. Developing an HM species characterization approach combining physiochemical separation, XAFS, PCA and LCF analysis is of important methodological significance and scientific value for HM studies of solid waste at the molecular scale with a complex physical and chemical composition. This technique has seldom been reported to date
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