Biosorption of Strontium Ions by Low-Cost Sunflower Stem and Leaf

Lian Ai; Xue Gang Luo; Xiao Yan Lin

doi:10.4028/www.scientific.net/MSF.804.59

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Biosorption of Strontium Ions by Low-Cost Sunflower Stem and Leaf
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HomeMaterials Science ForumMaterials Science Forum Vol. 804Biosorption of Strontium Ions by Low-Cost...

Biosorption of Strontium Ions by Low-Cost Sunflower Stem and Leaf

Abstract:

Low cost agricultural by-products are potential materials for water pollution treatment such as removal of radionuclide. This paper deals with removal of strontium ions from aqueous solution using sunflower stem (SFS) and leaf (SFL). Batch sorption experiments were performed as a function of initial solution pH, adsorbent dosage and initial strontium (II) concentration. The removal efficiency of strontium (II) increased with initial pH and achieved maximum values at a pH range of 4.0-7.0 both for SFS and SFL. The isotherm adsorption data was modeled best by the nonlinear Langmuir-Freundlich equation. The maximum sorption capacity of SFS and SFL were observed to be 17.87 and 22.31 mg/g under optimal conditions, respectively.