Abstract
The feasibility of the industrial application of kapok fiber for the removal of lead (II) ions from aqueous stream was evaluated in this study. The fiber was modified using NaOH solution and also was oxidized with NaClO2 solution. Both of the chemically enhanced kapok fibers showed a high adsorption efficiency, which was 23.4 and 34.6 mg/g, respectively, while unmodified kapok fibers had 4.70 mg/g. Kinetic reactions and their rate constants exhibited that the removal of lead was linearly correlated with adsorption capacity of the modified and oxidized kapok fibers. Adsorption isotherm of the experiment fitted very well with the Langmuir model for the chemically enhanced kapok fibers. Adsorption capacity decreased with a decrease in the pH. The recycling process of the used kapok fibers was also carried out and the results found that kapok fibers were reusable with relatively high regeneration rate.
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Wang, R., Shin, CH., Park, S. et al. Removal of lead (II) from aqueous stream by chemically enhanced kapok fiber adsorption. Environ Earth Sci 72, 5221–5227 (2014). https://doi.org/10.1007/s12665-014-3804-6
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DOI: https://doi.org/10.1007/s12665-014-3804-6