Effect of pH, ionic strength and temperature on sorption of Pb(II) on NKF-6 zeolite studied by batch technique

Autor:	Xiaoli Tan, Shubing Yang, Shitong Yang, Jun Hu, Xin Yang, Xiangke Wang
Rok vydání:	2011
Předmět:	Aqueous solution Ion exchange Chemistry General Chemical Engineering Inorganic chemistry Sorption General Chemistry Endothermic process Industrial and Manufacturing Engineering Adsorption Ionic strength Environmental Chemistry Fourier transform infrared spectroscopy Zeolite
Zdroj:	Chemical Engineering Journal. 168:86-93
ISSN:	1385-8947
Popis:	The effect of pH, ionic strength, solid/liquid ratio, contact time and temperature on sorption of Pb(II) to NKF-6 zeolite is investigated using batch technique under ambient conditions. The NKF-6 zeolite is characterized using XRD and FTIR. The sorption results indicate that the sorption of Pb(II) on NKF-6 zeolite is strongly dependent on pH. The sorption of Pb(II) is affected by ionic strength at pH 6. The sorption of Pb(II) is dominated by ion exchange or outer-sphere surface complexation at low pH values, and by inner-sphere surface complexation at high pH values. The thermodynamic parameters (ΔH0, ΔS0 and ΔG0) calculated from the temperature dependent sorption isotherms suggest that the sorption of Pb(II) on NKF-6 zeolite is endothermic and spontaneous process. The results are quite important to understand the interaction of Pb(II) with zeolite in aqueous solutions. This investigation shows that the NKF-6 zeolite can be used as a suitable adsorbent for the preconcentration and solidification of Pb(II) from large volumes of aqueous solutions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::31caa0295f22d0d704317f8d524ef624 https://doi.org/10.1016/j.cej.2010.12.039 Zobrazit plný text záznamu Full Text from ScienceDirect