Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Yu, Xingcai" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-3 z 3
    Tytuł:
    Insights into the interaction between octyl hydroxamic acid and the rutile surface activated by lead ion
    Autorzy:
    Cao, Qinbo
    Chen, Xiumin
    Zou, Heng
    Yu, Xingcai
    Powiązania:
    https://bibliotekanauki.pl/articles/1845214.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    flotation
    rutile
    activation
    density functional theory
    adsorption
    Opis:
    The flotation of rutile can be enhanced using lead ion as an activator. However, the binding behavior of collector on the activated rutile surface is still not fully understood. In this work, flotation and theoretical calculation approaches were employed to evaluate the activation behavior of lead ion in the flotation of rutile with octyl hydroxamic acid (OHA). Flotation results indicated that the activation flotation with lead ion should be conducted at pH 6.5. The binding features of OHA molecule on the inactivated and Pb-activated rutile surfaces were both investigated by density functional theory (DFT) studies. The OHA molecule may dissociate into OHA− anion on the inactivated rutile surface, generating a new Ti–O bond. Differently, the chelate complex of Pb-OHA anion was generated on the activated rutile surface, producing two Pb–O bonds. The adsorption of OHA onto the activated rutile surface was more stable than that on the inactivated rutile surface, due to the formation of more chemical bonds on the activated rutile surface. The DFT calculation results delineated the role of Pb2+ in the rutile flotation with OHA.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 5; 928-938
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interaction of sulfuric acid with dolomite (104) surface and its impact on the adsorption of oleate anion: a DFT study
    Autorzy:
    Cao, Qinbo
    Zou, Heng
    Chen, Xiumin
    Yu, Xingcai
    Powiązania:
    https://bibliotekanauki.pl/articles/1449558.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    dolomite
    adsorption
    oleate
    depressor
    density functional theory
    Opis:
    Sulfuric acid $(H_2SO_4)$ is a specific depressor for apatite rather than for dolomite. The $H_2SO_4$ treated dolomite can still be floated effectively by oleate. However, the role of $H_2SO_4$ in the adsorption of oleate onto dolomite surface remains unclear. In this work, density functional theory calculations were conducted to probe the interactions among sulfate anion ($SO_4^{2−}$), oleate anion and the dolomite surface. The adsorption behaviors of $SO_4^{2−}$ anion onto the perfect and $CO_3$-defect dolomite surfaces were compared. Such results show that $SO_4^{2−}$ anion could only adsorb onto the defective dolomite surface, where it bonded with a $Ca$ atom. The remaining $Ca$ and $Mg$ atoms at the defect site could further react with the oleate anion, generating new $Ca$/$Mg–O$ ionic bond. In this regard, oleate and $SO_4^{2−}$ anions may both present on the dolomite surface. This phenomenon accounts for the flotation of $H_2SO_{4-}$treated dolomite.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 1; 34-42
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Role of ammonium phosphate in improving the physical characteristics of malachite sulfidation flotation
    Autorzy:
    Ibrahim, Ayman M.
    Jia, Xiaodong
    Cai, Jinpeng
    Su, Chao
    Yu, Xingcai
    Zheng, Qifang
    Peng, Rong
    Shen, Peilun
    Liu, Dianwen
    Powiązania:
    https://bibliotekanauki.pl/articles/2200339.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    malachite sulfidation
    sample preparation
    ammonium phosphate
    sodium sulfide
    floatability
    physical characteristics
    Opis:
    In this study, ammonium phosphate ((NH4)3PO4) was employed to realize improvement by modifying the physical characteristics of the malachite surface, ensuring sustainable flotation throughout the flotation operations, and enhancing the flotation process to be more stable. Furthermore, various techniques, including X-ray photoelectron spectroscopy, were intensely used to investigate the configuration and physico-chemical surface characteristics through micro-flotation experiments, contact angle and zeta potential measurements, and XRD, ToF-SIMS, EPMA, and FTIR spectrum analyses. The FTIR findings showed that new characteristic peaks of -C(=S)-N.H. groups formed and adsorbed on the surfaces of malachite at 1636 cm-1. The -CH2 groups throughout the flotation process, further promoted the attachment of the CH3 ligand to the Cu2+ ion, and the XPS analysis confirmed this. Consequently, it can be concluded that (NH4)3PO4 played a substantial part in the improved recovery rate, as demonstrated and confirmed by the methods carried out in this study. Thus, it was used to modify the physical properties surface before adding Na2S to efficiently enhance malachite floatability and reduce the loss rate of malachite. Regarding the alterations in the physical characteristics which occurred to the malachite surface, and as a consequence of increasing the recovery results of flotation, the malachite sample treated initially with (NH4)3PO4 exhibited micro flotation results with a considerably greater flotation recovery than malachite treated initially with only Na2S ions.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2023, 59, 1; art. no. 161510
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies