The ability of magnetic Fe3O4 nanoparticles (MFN) to remove new coccine (NC), an acidic dye, from aqueous solutions was studied. Parameters including ionic strength, pH, and temperature were evaluated. MFN, prepared by precipitation method, exhibits an average particle size of 12.5 nm, specific surface area of 85.5 m2/g, and pHzpc of 5.9. Results of kinetic adsorption experiments indicated that the pseudo-second-order rate of adsorption increased with increasing initial NC concentration. Findings also revealed that the equilibrium data could be fitted into Langmuir adsorption isotherm. The adsorption is favored at low pH, high temperature, and low ionic strength, whereupon a maximum adsorption capacity of 1.11 × 10−4 mol/g was determined for NC. Thermodynamic functions indicated that the adsorption process is spontaneous and exothermic in nature. Tests of regeneration showed that after 5 regeneration cycles the adsorption capacity of NC decreased to 35% to its original capacity.
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Research Article|
August 01 2010
Magnetic Fe3O4 nanoparticles for adsorptive removal of acid dye (new coccine) from aqueous solutions
Chih-Huang Weng;
1Department of Civil and Ecological Engineering, I-Shou University, Da-Hsu Township, Kaohsiung 84008, Chinese Taiwan
E-mail: chweng@isu.edu.tw
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Yao-Tung Lin;
Yao-Tung Lin
2Department of Soil and Environmental Sciences, National Chung Hsing University, TaiChung 40227, Chinese Taiwan
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Chia-Ling Yeh;
Chia-Ling Yeh
1Department of Civil and Ecological Engineering, I-Shou University, Da-Hsu Township, Kaohsiung 84008, Chinese Taiwan
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Y. C. Sharma
Y. C. Sharma
3Department of Applied Chemistry, Institute of Technology, Banaras Hindu University, Varanasi 221 005, India
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Water Sci Technol (2010) 62 (4): 844–851.
Citation
Chih-Huang Weng, Yao-Tung Lin, Chia-Ling Yeh, Y. C. Sharma; Magnetic Fe3O4 nanoparticles for adsorptive removal of acid dye (new coccine) from aqueous solutions. Water Sci Technol 1 August 2010; 62 (4): 844–851. doi: https://doi.org/10.2166/wst.2010.310
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