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Start Over Author "Zhang, Xingrong" Journal separation and purification technology
8 results on '"Zhang, Xingrong"'

8. Flotation separation performance of malachite from calcite with new chelating collector and its adsorption mechanism

Author

Han Long, Li Youhui, Li Chengbi, Lu Liang, Zhu Yangge, and Zhang Xingrong

Subjects
Calcite, Chemistry, Sodium, chemistry.chemical_element, Filtration and Separation, Malachite, 02 engineering and technology, 021001 nanoscience & nanotechnology, Analytical Chemistry, chemistry.chemical_compound, Adsorption, 020401 chemical engineering, X-ray photoelectron spectroscopy, visual_art, visual_art.visual_art_medium, Zeta potential, Chelation, 0204 chemical engineering, 0210 nano-technology, Selectivity, Nuclear chemistry
Abstract

In this study, the flotation separation performances of malachite from calcite were investigated using a new chelating collector S-carboxymethyl-O, O’-dibutyl dithiophosphate (CMDTP) by micro-flotation tests, which showed that CMDTP exhibited a stronger collecting power and a better selectivity on malachite than octyl hydroxamic acid (OHA), 8-hydroxyquinoline (HQ) and sodium isobutyl xanthate (SIBX). In the flotation separation of artificially mixed minerals, malachite could be separated successfully from calcite at pH around 9.0 when using Na2S as a regulator. Its adsorption mechanism was also studied by FT-IR, zeta potential and XPS measurements, all of which confirmed that CMDTP showed a better affinity to malachite surface than to calcite surface. Furthermore, XPS provided obvious evidence that CMDTP could easily react with Cu2+ sites on malachite surface, and only a tiny adsorption occurred on calcite surface without Cu2+ ions.

Published
2021
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