Lead Ions Sorption from Waste Solution Using Aluminum Hydroxide Modified Diatomite

DOI: 10.4236/jep.2014.56054   PDF   HTML     3,718 Downloads   4,801 Views   Citations


This study investigated the effectiveness of aluminum modified diatomite in removing lead from aqueous solution. Scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray Fluorescence (XRF) and infrared spectroscopy were used to characterize the modified absorbents. Effects of several variables like pH, adsorbent dose, initial concentration and the reaction temperature on lead sorption were also investigated. Langmuir and Freundlich isotherm models were applied to describe the equilibrium data. Values of △H, △G and △S illustrated that the adsorption of lead is an endothermic process of nature. Comparing with the natural diatomite, the adsorption efficiency for the lead ions increased from 12.06% to 61.36% which indicated that aluminum modified diatomite can be used as a potential absorbent for lead ions.

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Wang, Y. , Lu, Y. , Chen, R. , Ma, L. , Jiang, Y. and Wang, H. (2014) Lead Ions Sorption from Waste Solution Using Aluminum Hydroxide Modified Diatomite. Journal of Environmental Protection, 5, 509-516. doi: 10.4236/jep.2014.56054.

Conflicts of Interest

The authors declare no conflicts of interest.


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