Abstract：
:Humic substance in compost contains various organic functional groups that can sorb metal ions through ionic force. This study used thermal treatment technology to concentrate copper in the heated residues while destroying the humic substance of copper-sorbed kitchen compost. Scanning electron microscopy (SEM) results show that copper clusters were formed in the heated residues. Information from both X-ray diffraction (XRD) patterns and Cu K-edge X-ray absorption spectroscopy (XAS) spectrum indicates that about 30% of the doped Cu(II) was chemically reduced to Cu(I) and Cu(0) when the sample was heated at 500 and 900 degrees C for 2h. The XAS results indicate that after 500 degrees C thermal treatment, the loaded Cu(NO(3))(2) was transformed into CuO (ca. 54%), Cu (ca. 18%), Cu(OH)(2) (ca. 15%), and Cu(2)O (ca.13%). Heating at 900 degrees C caused more transformation into elemental Cu probably due to more release of oxygen.
journal_name
Chemospherejournal_title
Chemosphereauthors
Wei YL,Lee YC,Yang YW,Lee JFdoi
10.1016/j.chemosphere.2004.08.046subject
Has Abstractpub_date
2004-12-01 00:00:00pages
1201-5issue
9eissn
0045-6535issn
1879-1298pii
S0045-6535(04)00710-6journal_volume
57pub_type
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