期刊
WATER SCIENCE AND TECHNOLOGY
卷 63, 期 12, 页码 2775-2780出版社
IWA PUBLISHING
DOI: 10.2166/wst.2011.542
关键词
biosorption; isotherms thermodynamics; kinetics; methylene blue; spent corncob substrate
资金
- National Natural Science Foundation of China [50802066]
- Hubei Key Laboratory of Pollutant Analysis and Reuse Technology [KY 2010G19]
- Fundamental Research Funds for the Central Universities [2010-IV-055]
This study focuses on the possible use of the spent corncob substrate (SCS), an agricultural waste used after the cultivation of white rot fungus Pleurotus ostreatus, to adsorb Methylene Blue (MB) from aqueous solutions. A batch adsorption study was carried out with variable solution pH, adsorption time, temperature and initial MB concentration. It was found that MB uptake was favorable at pH ranging from 4.0 to 12.0 and the equilibrium adsorption capacity can be reached promptly within about 180 min. The biosorption data were also calculated by the pseudo-second-order kinetic model and Langmuir isotherm model. Thermodynamic parameters show that the adsorption is a spontaneous and endothermic process. The study highlighted a new pathway to develop potential low-cost biosorbent for the removal of dye pollutants from wastewater.
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