Removal of Pb(II) ions from aqueous solution by adsorption using bael leaves (Aegle marmelos) |
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| Authors: | S. Chakravarty Ashok Mohanty T. Nag Sudha A.K. Upadhyay J. Konar J.K. Sircar A. Madhukar K.K. Gupta |
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| Affiliation: | 1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, PR China;2. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan 650093, PR China;3. Yunnan Institute of Food and Drug Administration, Kunming, Yunnan 650101, PR China;1. School of Environment, Tsinghua University, Beijing 100084, China;2. Beijing Municipal Environmental Monitoring Center, Beijing 100084, China |
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| Abstract: | Biosorption of Pb(II) on bael leaves (Aegle marmelos) was investigated for the removal of Pb(II) from aqueous solution using different doses of adsorbent, initial pH, and contact time. The maximum Pb loading capacity of the bael leaves was 104 mg g?1 at 50 mg L?1 initial Pb(II) concentration at pH 5.1. SEM and FT-IR studies indicated that the adsorption of Pb(II) occurs inside the wall of the hollow tubes present in the bael leaves and carboxylic acid, thioester and sulphonamide groups are involved in the process. The sorption process was best described by pseudo second order kinetics. Among Freundlich and Langmuir isotherms, the latter had a better fit with the experimental data. The activation energy Ea confirmed that the nature of adsorption was physisorption. Bael leaves can selectively remove Pb(II) in the presence of other metal ions. This was demonstrated by removing Pb from the effluent of exhausted batteries. |
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