Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 185, Issue 1, Pages 502-506Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2010.09.029
Keywords
Biosorption; Neutral Red; Spent cottonseed hull substrate; Pleurotus ostreatus
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Funding
- National Natural Science Foundation of China [50802066]
- National Eleventh Five-Year Plan Supporting Project [2007BAB15B01]
- Fundamental Research Funds for the Central Universities [2010-IV-055]
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Cottonseed hull, a low-cost widely available agricultural waste in China, after used as substrate for the white rot fungus Pleurotus ostreatus cultivation. Was tested for the removal of Neutral Red (NR), a cationic dye, from aqueous solution. A batch adsorption study was carried out with varied solution pH, adsorbent dosage, reaction time and initial NR concentration. The results show that the kinetics of dye removal by the spent cottonseed hull substrate (SCHS) is prompt in the first 5 min and the adsorption equilibrium can be attained after 240 min. The biosorption kinetics and equilibrium follow typical pseudo-second-order and Langmuir adsorption models. Thermodynamic parameters of Delta G(o), Delta H(o) and Delta S(o) show that the adsorption is a spontaneous and endothermic process. Fourier transform infrared (FTIR) spectroscopy was used for the characterization of possible dye-biosorbent interaction. This study provides a facile method to produce low-cost biosorbent for the purification of dye contaminated water. (C) 2010 Elsevier B.V. All rights reserved.
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