期刊
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
卷 15, 期 4, 页码 530-538出版社
SPRINGER
DOI: 10.1007/s10163-013-0131-z
关键词
Heavy metal; Waste sludge; Ultrasound; Leaching; Separation
资金
- Nature Science Foundation of China [20777020]
- Enterprise-College-Institute Cooperative Project Foundation of Guangdong Province and Ministry of Education of China [2007B090400037]
- Science and Technology Planning Project Foundation of Guangzhou City [2008Z1-E481]
Lab synthesized metal-bearing sludge (LSMS) was used in series of designed lab tests to evaluate impacts of ultrasound on selective separation of heavy metals through acid leaching. The tests eliminated the potential of induced bias generated by utilizing field sludge that were produced from different location sources. The results showed that metal pairs of Cu and Fe, Cu and Cr, and Cr and Fe inside LSMS could be practically separated with one metal being contained in a liquid phase and another in a solid phase through acid leaching processes enhanced by ultrasound. With assistance of ultrasound, the acid leaching demonstrated a more efficient segregation between metals within LSMS than a conventional leaching that doesn't have ultrasonic enhancement, and the tests provided in a generic means that ultrasonically enhanced acid leaching could cost-efficiently recover heavy metals from metal-containing waste sludge.
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