Lead Ions Sorption from Waste Solution Using Aluminum Hydroxide Modified Diatomite

Ying Wang, Yifeng Lu, Rongzhi Chen, Lan Ma, Yong Jiang, Huan Wang

College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China.
School of Life Sciences, Yunnan University, Kunming, China.
Tianjin Research Institute for Water Transport Engineering, M.O.T., Tianjin, China.
YT R D Center (Kunming) for Power and Energy Storage Batteries, Kunming, China.
Yunnan Academies of Science and Technology Development, Yunnan, China.

DOI: 10.4236/jep.2014.56054                

Abstract

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.

Keywords

Diatomite, Lead, Adsorption, Aluminum Hydroxide, Modification

Conflicts of Interest

The authors declare no conflicts of interest.

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