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Sequential Extraction of Valuable Trace Elements from Bayer Process-Derived Waste Red Mud Samples
- Source :
- Journal of Sustainable Metallurgy. 4:147-154
- Publication Year :
- 2018
- Publisher :
- Springer Science and Business Media LLC, 2018.
-
Abstract
- Bayer Process-derived red mud produced in China can be classified into three types according to chemical composition: high-iron diaspore red mud, low-iron diaspore red mud, and gibbsite red mud. The specific chemical and mineral compositions of three such typical Bayer-derived red mud samples have been characterized by XRF, ICP-MS, XRD, and SEM. These results, for example, indicate that GX (a high-iron diaspore red mud) contains more than 1015 μg/g lanthanides, 313 μg/g yttrium, 115 μg/g scandium, and 252 μg/g niobium and that HN (a low-iron diaspore red mud) has a high content of lithium (224 μg/g), whereas SD (a gibbsite red mud) possesses a very low valuable trace element content, except for gallium (59.4 μg/g). A sequential extraction procedure was carried out to assess the leachability of valuable trace elements in these three red mud samples. Applying the extraction procedure, 60% of the yttrium in GX and 65% of the lithium in HN could be extracted which would be of interest for trace metal recovery.
- Subjects :
- Extraction (chemistry)
Metals and Alloys
Trace element
chemistry.chemical_element
02 engineering and technology
Yttrium
Environmental Science (miscellaneous)
Diaspore
Bayer process
Red mud
020501 mining & metallurgy
0205 materials engineering
chemistry
Mechanics of Materials
Trace metal
Gibbsite
Nuclear chemistry
Subjects
Details
- ISSN :
- 21993831 and 21993823
- Volume :
- 4
- Database :
- OpenAIRE
- Journal :
- Journal of Sustainable Metallurgy
- Accession number :
- edsair.doi...........b0c138a531eb6ee83e60404c7e523985