The Adsorption-desorption Behaviors of β Phenylaminopropiophenone on Iron in Sulphuric Acid Solution

Authors

Xianzhang Bu, Department of Environmental Science, Wuhan Unversity, Wuhan 430072
Dihua Wang, Department of Environmental Science, Wuhan Unversity, Wuhan 430072
Jinyun Zou, Department of Environmental Science, Wuhan Unversity, Wuhan 430072
Fuxing Gan, Department of Environmental Science, Wuhan Unversity, Wuhan 430072

Corresponding Author

Xianzhang Bu

Abstract

The adsorption-desorption behaviors of β-phenylaminopropiophenone (PAP) on iron in 0.5 mol·L^-1 H₂SO₄ solution with or without halide ions (Cl^-,I^-) were investigated by potentiostatic polarization measurement. The results show that the adsorption of PAP on iron surface follows Flory-Huggins isotherm, the adsorption free energy parameter ( f ) is positive in H₂SO₄ solution; In the presence of 0.1 mol·L^-1 Cl^-1 , when C_PAP ≤ 2×10^-5 mol·L^-1, f＞0. A desorption phenomenon was observed at more positive potential region in anodic polarization curves. Furthermore, the anodic desorption potential (E_des) of PAP+X^- is independent of PAP concentration at lower concentration region, and E_des vs. lgC_PAP is a straight line at higher concentration region. The joint adsorption modes under different conditions were determined according to the above stated relation of E_des to PAP concentrations as well as the adsorption free energy parameter f values.

Keywords

Iron, β-phenylaminopropiophenone, Adsorption, Anodic desorption

DOI Link

https://doi.org/10.61558/2993-074X.3099

Publication Date

1997-02-28

Online Available Date

1997-02-28

Revised Date

1996-09-23

Received Date

1996-07-28

Recommended Citation

Xianzhang Bu, Dihua Wang, Jinyun Zou, Fuxing Gan. The Adsorption-desorption Behaviors of β Phenylaminopropiophenone on Iron in Sulphuric Acid Solution[J]. Journal of Electrochemistry, 1997 , 3(1): 55-60.
DOI: 10.61558/2993-074X.3099
Available at: https://jelectrochem.xmu.edu.cn/journal/vol3/iss1/10