Surface-charging and particles aggregation behavior of ascharite

• Autorzy: Li Zhihang , Han Yuexin , Zuo Kesheng

Identyfikatory

DOI

10.5277/ppmp19021

• Języki publikacji: EN

Abstrakty

EN

Surface charging and particles aggregation ascharite are investigated through Zeta potential measurement, XPS analysis, SEM analysis and dissolution experiments. The results show that more Mg²⁺ are removed from ascharite surface after dissolution, which confirms that incongruent dissolution of ions in the case of certain ionic substances like rmagnesium ions, hydroxyl groups and borate ions can lead to a net charge on surface. Isomorphous substitution of Fe³⁺ for Mg²⁺ is also regarded as one factor that causes surface charging behavior, which is in consistent with the experimental data. The dissolution process is analyzed to show more details about the dissolution reactions. The disparity in the bonding energy of B–O and Mg–OH surface groups and the difference in free energy of hydration of surface groups are considered to be the basic reason that lead to incongruent dissolution. Eventually, the effect of surface potential on particles aggregation is analyzed by DLVO theory, indicating that dissolution of ascharite has a detrimental effect on particles dispersion.

Słowa kluczowe

EN

ascharite; surface charge; incongruent dissolution; particles aggregation

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 4
• Strony: 991--1001
• Opis fizyczny: Bibliogr. 42 poz., rys., tab., wz.

Twórcy

autor

Li Zhihang

• School of Earth Science and Resources, Chang’an University, Xi’an 710054, China

autor

Han Yuexin

• College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China

autor

Zuo Kesheng

• School of Earth Science and Resources, Chang’an University, Xi’an 710054, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).