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Vol. 26 No. 9 (2014): Vol 26 Issue 9

Copyright (c) 2014 AJC

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Effect of pH, Ionic Strength and Heavy Metal Ions on p-Nitrophenol Adsorption by Variable Charge Soil of South China

https://doi.org/10.14233/ajchem.2014.15788
J.Y. Zhang
School of Environment and Energy, South China University of Technology, Guangzhou 510006, P.R. China
C.D. Wu
School of Environment and Energy, South China University of Technology, Guangzhou 510006, P.R. China ;The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Education, Guangzhou 510006, P.R. China
Z.L. Zhang
School of Environment and Energy, South China University of Technology, Guangzhou 510006, P.R. China

Corresponding Author(s) : C.D. Wu

ppchdwu@scut.edu.cn

Asian Journal of Chemistry, Vol. 26 No. 9 (2014): Vol 26 Issue 9

Abstract

The adsorption behaviour of p-nitrophenol on variable charge soil was studied in simulated micropolluted surface water through batch adsorption experiments. It was observed that the adsorption of p-nitrophenol decreased with increasing the pH values of solution, whereas it increased with increasing of ionic strength content, temperature and adsorbent dose and the presence of heavy metal ions depressed the adsorption of p-nitrophenol. Langmuir and Freundlich models were used to describe the adsorption isotherms. Results indicated that Freundlich model was fit to experimental data well, revealing the possibility of more than just one monomolecular layer of coverage on the soil surface. The pseudo-first-order and pseudo-second-order kinetic model were applied to describe the kinetic data. The experimental data agreed with pseudo-second-order kinetic model well. Scanning electron microscope and Fourier transform infrared spectroscopy were used to characterize the soil before and after adsorption of p-nitrophenol.

Keywords

Adsorption p-Nitrophenol Ionic strength Variable charge soil
Zhang, J., Wu, C., & Zhang, Z. (2014). Effect of pH, Ionic Strength and Heavy Metal Ions on p-Nitrophenol Adsorption by Variable Charge Soil of South China. Asian Journal of Chemistry, 26(9), 2655–2660. https://doi.org/10.14233/ajchem.2014.15788
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