期刊
BIORESOURCE TECHNOLOGY
卷 259, 期 -, 页码 156-163出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.03.019
关键词
Co-liquefaction; Sewage sludge; Lignocellulosic biomass; Heavy metal; Distribution behavior
资金
- National Natural Science Foundation of China [51668044, 51768043, 21276069]
- Key Research Development Program of the Jiangxi Province of China [20161BBH80029, 20171BBG70036]
- Talent Program for Distinguished Young Scholars of Jiangxi Province of China [20171BCB23015]
- Science Foundation for Youths of Jiangxi Province, China [20171BAB216037]
- Key Science and Technology Research Program of Department of Education of the Jiangxi Province of China [150029]
Co-liquefaction of municipal sewage sludge (MSS) and heavy metal (HM) contaminated lignocellulosic biomass (rice straw or wood sawdust) was conducted at 300 degrees C with ethanol as the solvent to study the transformation behavior of HMs (e.g., Cu, Cd, Pb, Cr, Zn, and Ni). The results indicate that HMs in rice straw or wood sawdust transferred heavily to bio-oils (up to 10-25% of the total Cu, Cd, and Zn) when they were liquefied individually, compared with MSS with only similar to 5% distributed to bio-oil. The bio-available fraction of HMs in bio-chars and bio-oils produced from liquefaction of individual biomass were assessed to show medium to high risk to the environment. Co-liquefaction promoted the distribution of HMs to solid bio-char. Moreover, co-liquefaction benefited the immobilization of HMs in bio-chars and bio-oils. Synergistic effects were found for HMs immobilization during co-liquefaction.
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