Lead ion modification and its enhancement for xanthate adsorption on smithsonite surface
| Autor: | Lianbing Zhao, Jiantao Lang, Song Zhang, Yongjun Xian, Qicheng Feng, Shuming Wen, Shaojun Bai, Guang Han |
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| Rok vydání: | 2019 |
| Předmět: |
Smithsonite
Chemistry Inorganic chemistry General Physics and Astronomy 02 engineering and technology Surfaces and Interfaces General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Mass spectrometry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films chemistry.chemical_compound Adsorption X-ray photoelectron spectroscopy engineering Surface modification Xanthate Inductively coupled plasma Fourier transform infrared spectroscopy 0210 nano-technology |
| Zdroj: | Applied Surface Science. 498:143801 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2019.143801 |
| Popis: | In this study, the interaction between Pb ions and a smithsonite surface was investigated, and its effect on the xanthate adsorption of a mineral surface was evaluated. Micro-flotation tests indicated that the smithsonite flotation in a PbNO3 solution (5 × 10−5 mol/L) was approximately doubled with respect to that without Pb ion modification, where the xanthate functioned as a collector. The results of inductively coupled plasma mass spectroscopy suggested that the modification of Pb ions can be achieved via ion adsorption and exchange on the mineral surface. The potential structure of a Pb-modified smithsonite surface was investigated via Visual MINTEQ and X-ray photoelectron spectroscopy. During the modification, large amounts of Pb species, including PbCO3 and Pb3(CO3)2(OH)2, were formed on the smithsonite surface. The results of Fourier transform infrared spectroscopy and time-of-flight secondary-ion mass spectrometry indicated that Pb modification increased the number of active Pb sites for xanthate adsorption to improve the formation of hydrophobic Pb-xanthate precipitate. The adsorption tests revealed that Pb modification enhanced the stability of the xanthate products on the smithsonite surface. Therefore, the interaction of Pb ions with the smithsonite surfaces enhanced the strength and stability of the hydrophobic layer, resulting in the enhanced hydrophobization of smithsonite. |
| Databáze: | OpenAIRE |
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