Copper hexacyanoferrate nanoparticle-decorated biochar produced from pomelo peel for cesium removal from aqueous solution
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A microporous composite (CuHCF/PP600) for cesium removal was successfully prepared by copper hexacyanoferrate (CuHCF) dispersed into a biochar (pomelo peel was carbonized at 600 °C). In comparison with CuHCF/PP600 and pure CuHCF, it was showed that CuHCF/PP600 had better performances on sedimentation and cesium removal. The maximum removal efficiency of cesium by the composite is 30.06 mg/g (at pH 7.0). Adsorption kinetic and isotherm of CuHCF/PP600 were followed to Langmuir isotherm model and pseudo-second-order kinetic model respectively. Thermodynamic analysis shows that the adsorption process was endothermic. The removal efficiency of Cs+ was down less than 5% in the presence of Na+, K+, Mg2+. The results indicate that CuHCF/PP600 is a promising adsorbent for cesium removal from aqueous solution.
KeywordsCesium Biochar Adsorption Copper hexacyanoferrate
Financial supports from National Natural Science Foundation of China (Nos. 11705060, 11605027, 41867063, 21866005), Natural Science Foundation of Jiangxi Province (No. 20161BAB213086), and the Project of the Jiangxi Provincial Department of Education (Nos. GJJ170400, GJJ180372) are gratefully acknowledged.