Roles of pyrolysis on availability, species and distribution of Cu and Zn in the swine manure: chemical extractions and high-energy synchrotron analyses.
作者： Q. Lin , L. Liang , L.H. Wang , Q.L. Ni , K. Yang
DOI: 10.1016/J.CHEMOSPHERE.2013.07.053
关键词:
摘要: Animal manures generally contain high levels of heavy metals that may pose a significant threat to soil and groundwater qualities. Pyrolysis as means reducing metal availability in such feed stocks is recently encouraged, but systematic studies are currently lacking. The aim this study was assess the impact pyrolysis temperature on Cu Zn by chemical extraction, determine speciation synchrotron-based X-ray spectroscopy, finally investigate phase distribution species carbonaceous materials combining acid-base extractions absorption spectroscopy data. results showed both swine manure were mainly bound organic functional groups. (II) reduction (I)-S complexes observed during process. resembling ZnAc2 still dominant, being 60.8-69.2%, ZnS increased 6.6-21.8% materials. mineral, carbonized non-carbonized phases varied greatly with temperature. higher temperature, more existed mineral phase. decrease EDTA extractable due increase It suggested at relatively better choice for metal-containing according speciation, solubility availability. (C) 2013 Elsevier Ltd. All rights reserved.
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