期刊
ARABIAN JOURNAL OF CHEMISTRY
卷 10, 期 -, 页码 S3595-S3602出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.arabjc.2014.03.010
关键词
Adsorption; Modified peanut husk; Light green dye
资金
- National Natural Science Foundation of China [J1210060]
Peanut husk was modified using a cationic surfactant hexadecylpyridinium bromide (CPB) and used as an adsorbent (MPH) to remove light green dye (LG, anionic dye) from aqueous solution in batch mode. Analysis of FTIR and XRF showed that CPB was adsorbed onto the surface of peanut husk. LG was analyzed using a UV spectrophotometer at the wavelength of maximum absorbance (660 nm). The results showed that it was in favor of adsorption at pH 2-4 while the presence of NaCl and CaCl2 in solution was not beneficial to LG dye adsorption. Pseudo-first-order kinetic equation and Elovich equation can describe the adsorption kinetics. The equilibrium data were better described by Langmuir isotherm and adsorption capacity of q(m) from Langmuir model was 146.2 +/- 2.4 mg/g at 303 K. Thermodynamic calculations showed that the adsorption was spontaneous and an exothermic process. Exhausted MPH was regenerated by 0.01 mol/L NaOH solution and MPH can be reused. The results implied that MPH can be used as an effective adsorbent material to remove LG from aqueous solution. (C) 2014 King Saud University. Production and hosting by Elsevier B.V.
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