Preparation, characterization and adsorption properties of chitosan nanoparticles for eosin Y as a model anionic dye.
The present study dealt with the adsorption of eosin Y, as a model anionic dye, from aqueous solution using chitosan nanoparticles prepared by the ionic gelation between chitosan and tripolyphosphate. The nanoparticles were characterized by atomic force microscopy (AFM), size and zeta potential analysis. A batch system was applied to study the adsorption of eosin Y from aqueous solution by chitosan nanoparticles. The results showed that the adsorption of eosin Y on chitosan nanoparticles was affected by contact time, eosin Y concentration, pH and temperature. Experimental data followed Langmuir isotherm model and the adsorption capacity was found to be 3.333 g/g. The adsorption process was endothermic in nature with an enthalpy change (DeltaH) of 16.7 kJ/mol at 20-50 degrees C. The optimum pH value for eosin Y removal was found to be 2-6. The dye was desorbed from the chitosan nanoparticles by increasing the pH of the solution.
Du
Wen Li
WL
Institute of Feed Science, College of Animal Science, Zhejiang University, The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China. wenlidu@126.com
Xu
Zi Rong
ZR
Han
Xin Yan
XY
Xu
Ying Lei
YL
Miao
Zhi Guo
ZG
D000327:Adsorption; D048271:Chitosan / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D004801:Eosine Yellowish-(YS) / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D053758:Nanoparticles / Q000737:chemistry*; D013696:Temperature; D013783:Textile Industry; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D004396:Coloring Agents; D007220:Industrial Waste; D048271:Chitosan; D004801:Eosine Yellowish-(YS)