Lead (II) removal using lignin obtained from pseudostem banana treatment
The adsorption of lead ions (Pb2+) on lignin was investigated. Lignin of black liquor generated in the pa-per production process from banana stem recovered, obtaining an efficiency of 82% regarding to recovery process. Lignin was characterized by infrared spectroscopy to identify suitable active sites for the adsorp-tion of heavy metals. Surface characteristics were determined by adsorption–desorption isotherms of ni-trogen (N2). Recovered lignin showed a surface area of 840 m2/g and a total pore volume of 0.30cm3/g. After that, solutions of Pb2+ at 0.6, 0.8 and 1.0 mM were prepared to evaluate the adsorption capacity of lignin with respect to initial concentration of the ions. The final concentration of Pb2+ was determined by Atomic Absorption Spectroscopy (AA) achieving removal efficiencies of 55%.
| Main Authors: | , |
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| Format: | Digital revista |
| Language: | spa eng |
| Published: |
Universidad Nacional de Colombia - Sede Palmira
2015
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| Online Access: | https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/43488 |
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