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Lead Ions Sorption from Waste Solution Using Aluminum Hydroxide Modified Diatomite
School of Life Sciences, Yunnan University, Kunming, China
School of Life Sciences, Yunnan University, Kunming, China
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
Yunnan Academies of Science and Technology Development, Yunnan, China
YT R D Center (Kunming) for Power and Energy Storage Batteries, Kunming, China
Tianjin Research Institute for Water Transport Engineering, M.O.T., Tianjin, China
- 1 School of Life Sciences, Yunnan University, Kunming, China
- 2 School of Life Sciences, Yunnan University, Kunming, China
- 3 College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
- 4 Yunnan Academies of Science and Technology Development, Yunnan, China
- 5 YT R D Center (Kunming) for Power and Energy Storage Batteries, Kunming, China
- 6 Tianjin Research Institute for Water Transport Engineering, M.O.T., Tianjin, China
Journal of Environmental Protection·Volume 05 (2014)·Pages 509–516·Published 12 May 2014·DOI10.4236/jep.2014.56054
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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.
KeywordsDiatomiteLeadAdsorptionAluminum HydroxideModification
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