Study of H2O adsorption on sulfides surfaces and thermokinetic analysis

Cuihua Zhao; Jianhua Chen; Xianhao Long; Jin Guo

Journal of Industrial and Engineering Chemistry, Vol.20, No.2, 605-609, March, 2014

DOI10.1016/j.jiec.2013.05.021 Export Citation

Study of H2O adsorption on sulfides surfaces and thermokinetic analysis

Cuihua Zhao^{1, 2}, Jianhua Chen^{1, 3, †}, Xianhao Long¹, and Jin Guo⁴

¹School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
²College of Material Science and Engineering, Guangxi University, Nanning 530004, China
³College of Resources and Metallurgy, Guangxi University, Nanning 530004, China
⁴College of Physics Science and Engineering, Guangxi University, Nanning 530004, China

E-mail:

Adsorption of water on mineral surfaces was studied using density functional theory and microcalorimetry technique. The calculation results show that galena and molybdenite are hydrophobic, while pyrite and sphalerite is hydrophilic. Thermokinetic analysis shows that the heat of adsorption is in decreasing order of pyrite, sphalerite, galena and molybdenite, which is in good agreement with the calculation results. The adsorption kinetics parameters of hydrophobic galena and molybdenite surfaces are close, while those of hydrophilic pyrite and sphalerite surfaces are very different. The adsorption rate of water on the sphalerite surface is larger than that of water on the pyrite surface.

Keywords:Water adsorption;Sulfide minerals;Density functional theory;Microcalorimetry;Thermokinetic

[References]

Sutherland JK, Wark IW, Principles of flotation., Australian institute of mining and metallurgy (Inc.), Melbourne, Australia, 1955. (1955)
Thiel PA, Madey TE, Surf. Sci., 7(21), I385 (1987)
Pettenkofer C, Jaegermann W, Bronold M, Berichte der Bunsengesellschaft fu¨ r, 95, 560 (1991)
Nesbitt HW, Muir IR, Geochim. Cosmochim. Acta, 58, 4667 (1994)
Buckley AN, Woods R, Appl. Surf. Sci., 22-23, 280 (1985)
Pratt AR, Muir IJ, Nesbitt HW, Geochim. Cosmochim. Acta, 58, 827 (1994)
Buckley AN, Woods R, Aust. J. Chem., 37, 2403 (1984)
Losch W, Monhemius AJ, Surf. Sci., 60, 196 (1976)
Kevin MR, Becker U, Michael FH, American Mineralogist, 84, 1549 (1999)
Rimstidt JD, Vaughan DJ, Geochim. Cosmochim. Acta, 67, 873 (2003)
Evangelou VP, Pyrite Oxidation and Its Control, CRC Press, NewYork, 1995. (1995)
Chandra AP, Gerson AR, Surf. Sci. Rep., 65, 293 (2010)
Payne MC, Teter MP, Allan DC, Arias TA, Joannopoulos JD, Rev. Mod. Phys., 64, 1045 (1992)
Perdew JP, Wang Y, Phys. Rev., B, Condens. Matter, 45, 13244 (1992)
Vanderbilt D, Phys. Rev., B, Condens. Matter, 41, 7892 (1990)

[1] Sutherland JK, Wark IW, Principles of flotation., Australian institute of mining and metallurgy (Inc.), Melbourne, Australia, 1955. (1955)

[2] Thiel PA, Madey TE, Surf. Sci., 7(21), I385 (1987)

[3] Pettenkofer C, Jaegermann W, Bronold M, Berichte der Bunsengesellschaft fu¨ r, 95, 560 (1991)

[4] Nesbitt HW, Muir IR, Geochim. Cosmochim. Acta, 58, 4667 (1994)

[5] Buckley AN, Woods R, Appl. Surf. Sci., 22-23, 280 (1985)

[6] Pratt AR, Muir IJ, Nesbitt HW, Geochim. Cosmochim. Acta, 58, 827 (1994)

[7] Buckley AN, Woods R, Aust. J. Chem., 37, 2403 (1984)

[8] Losch W, Monhemius AJ, Surf. Sci., 60, 196 (1976)

[9] Kevin MR, Becker U, Michael FH, American Mineralogist, 84, 1549 (1999)

[10] Rimstidt JD, Vaughan DJ, Geochim. Cosmochim. Acta, 67, 873 (2003)

[11] Evangelou VP, Pyrite Oxidation and Its Control, CRC Press, NewYork, 1995. (1995)

[12] Chandra AP, Gerson AR, Surf. Sci. Rep., 65, 293 (2010)

[13] Payne MC, Teter MP, Allan DC, Arias TA, Joannopoulos JD, Rev. Mod. Phys., 64, 1045 (1992)

[14] Perdew JP, Wang Y, Phys. Rev., B, Condens. Matter, 45, 13244 (1992)

[15] Vanderbilt D, Phys. Rev., B, Condens. Matter, 41, 7892 (1990)