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| Phosphorus adsorption behaviors on iron-coated wasted eggshell in aqueous solution |
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Abstract Modification of wasted eggshell using ferric salt and phosphorus adsorption behaviors on the iron-coated eggshell are investigated. The results show that phosphorus adsorption capacity can be markedly improved on iron-coated eggshell compared to that on eggshell without modification. Phosphorus adsorption on iron-coated eggshell is an endothermal process, and its adsorption isotherms can be well described by Freundlich equation. The time-resolved curves of phosphorus adsorption on iron-coated eggshell follows pseudo-second-order kinetic model. In addition, solution initial pH values have a significant effect on phosphorus adsorption. the maximum phosphorus adsorption amount on iron-coated eggshell can be achieved at pH value of 3.
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Received: 26 July 2010
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