Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (3): 404-408.DOI: 10.12068/j.issn.1005-3026.2018.03.020

• Resources & Civil Engineering • Previous Articles     Next Articles

Surface Property of Serpentine

LI Zhi-hang, HAN Yue-xin, LI Yan-jun, GAO Peng   

  1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2016-10-11 Revised:2016-10-11 Online:2018-03-15 Published:2018-03-09
  • Contact: HAN Yue-xin
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Abstract: Dissolution experiments, SEM, Zeta potential tests and XPS are used to analyse the surface property of serpentine. The results showed that the surface of serpentine is prone to dissolve in aqueous solution and make pulp pH alkaline, which reveals strong buffer ability. Compared with undissolved serpentine, embossment and flocculent structure are observed on the surface topography of dissolved serpentine. Besides, the surface elements content also has a big diffrence. The crystal structure of serpentine was discussed to understand the dissolution mechanism. The result indicated that large amounts of Mg2+ and —OH expose on serpentine surface after grinding and transfer to aqueous solution which leading to a high pH value and high content of Mg2+ of pulp. Furthermore, because of more —OH exposed on fine-grained serpentine surface, the rise of pH value is more remarkable and higher pH value is obtained.

Key words: serpentine, surface property, dissolution, crystal structure, flotation

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