Journal
SEPARATION SCIENCE AND TECHNOLOGY
Volume 55, Issue 2, Pages 358-368Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2019.1577270
Keywords
Ilmenite; adsorption; surface modification; DDDA
Funding
- National Natural Science Foundation of China [51504290]
- Collaborative Innovation Center for Clean and Efficient utilization of Strategic Metal Mineral Resources
- Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources [2018TP1002]
- National Science and Technology Support Program [2015BAB19B01]
- Innovation-driven Program of Central South University of China [2015CX005]
- Hunan Natural Science Foundation for the youth [2018JJ3665]
- National 111 Project [B14034]
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In the study, a novel compound of dodecyliminodimethylenediphosphoinc acid was synthesized, and its adsorption mechanism onto ilmenite surface was investigated by zeta potential, Fourier transform infrared (FTIR) and X-ray photoelectron spectroscop (XPS) measurements. The zeta potential measurement results indicated that dodecyliminodimethylenediphosphoinc acid (DDDA) could adsorb onto ilmenite surface, and the optimum pH range for adsorption was 4-8 (similar to the flotation behavior). The FTIR analyses further confirmed that DDDA chemisorbed onto ilmenite surface and formed metal-DDDA complex, rendering the hydrophobic media for flotation. The XPS results provided strong evidences that DDDA species chemisorbed onto ilmenite surface and reacted with Fe ions rather than Ti ions.
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