TY - JOUR
T1 - Effect of Fenton-like oxidation reagent on hydrophobicity and floatability of chalcopyrite and molybdenite
AU - Suyantara, Gde Pandhe Wisnu
AU - Hirajima, Tsuyoshi
AU - Miki, Hajime
AU - Sasaki, Keiko
AU - Yamane, Masashi
AU - Takida, Eri
AU - Kuroiwa, Shigeto
AU - Imaizumi, Yuji
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Science Research (JSPS KAKENHI) from the Japan Society for the Promotion of Science (JSPS) – Japan [Grant numbers JP15H02333 ]; and the Ministry of Education, Culture, Sports, Science and Technology – Japan (MEXT) .
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/10/5
Y1 - 2018/10/5
N2 - A fundamental study is provided in this work to understand the effect of Fenton-like reagent made by the addition of FeSO4 in H2O2 aqueous solution on surface hydrophobicity and floatability of chalcopyrite (CuFeS2) and molybdenite (MoS2). Contact angle measurements were performed to assess the surface hydrophobicity. The contact angle results showed that Fenton-like reagent could alter the surface hydrophobicity of chalcopyrite at lower concentration of H2O2 aqueous solution compared to that of using H2O2 aqueous solution. On the other hand, molybdenite surface remained hydrophobic after the oxidation treatments using Fenton-like reagent and H2O2 aqueous solution. Surface characterizations using atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) shows that the chalcopyrite surface covered with a thicker layer of oxidation products after the oxidation treatment using Fenton-like reagent, indicating a stronger surface oxidation. Flotation results were in agreement with contact angle results, showing that Fenton-like reagent could depress the floatability of chalcopyrite at lower concentration of H2O2 aqueous solution. On the other hand, molybdenite recovery remained high under various oxidation treatments owing to low surface oxidation.
AB - A fundamental study is provided in this work to understand the effect of Fenton-like reagent made by the addition of FeSO4 in H2O2 aqueous solution on surface hydrophobicity and floatability of chalcopyrite (CuFeS2) and molybdenite (MoS2). Contact angle measurements were performed to assess the surface hydrophobicity. The contact angle results showed that Fenton-like reagent could alter the surface hydrophobicity of chalcopyrite at lower concentration of H2O2 aqueous solution compared to that of using H2O2 aqueous solution. On the other hand, molybdenite surface remained hydrophobic after the oxidation treatments using Fenton-like reagent and H2O2 aqueous solution. Surface characterizations using atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) shows that the chalcopyrite surface covered with a thicker layer of oxidation products after the oxidation treatment using Fenton-like reagent, indicating a stronger surface oxidation. Flotation results were in agreement with contact angle results, showing that Fenton-like reagent could depress the floatability of chalcopyrite at lower concentration of H2O2 aqueous solution. On the other hand, molybdenite recovery remained high under various oxidation treatments owing to low surface oxidation.
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U2 - 10.1016/j.colsurfa.2018.06.029
DO - 10.1016/j.colsurfa.2018.06.029
M3 - Article
AN - SCOPUS:85049533453
SN - 0927-7757
VL - 554
SP - 34
EP - 48
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
ER -