Title :
Adsorption properties of new activity rice hull ash pretreated by white-rot fungi for adsorption oil bleaching process
Author_Institution :
Sch. of Life Sci. & Chem. Eng., Huaiyin Inst. of Technol., Huai´´an, China
Abstract :
Adsorption properties of new rice hull ash (RHA) pretreated by white-rot fungi for oil bleaching process were researched in this paper. The results showed that the adsorption capacity and rate of new RHA were better than that of normal RHA, and the adsorption characteristic conformed to the Freundlich thermodynamic isotherms. The variations of adsorption enthalpy, the Gibbs free energy and the entropy could be calculated according to the thermodynamic function. The results showed that the adsorption was an exothermic process which was both monolayer adsorption but also the multi-molecular layer adsorption with the coexistence of physical and chemical adsorption. Temperature elevation and adsorbent dosage increase could promote adsorption.
Keywords :
adsorption; ash; biotechnology; bleaching (materials processing); crops; enthalpy; free energy; microorganisms; Freundlich thermodynamic isotherms; Gibbs free energy; RHA; activity rice hull ash; adsorbent dosage increase; adsorption capacity; adsorption characteristic; adsorption enthalpy; adsorption oil bleaching process; adsorption property; chemical adsorption; entropy; exothermic process; monolayer adsorption; multimolecular layer adsorption; physical adsorption; temperature elevation; thermodynamic function; white-rot fungi pretreatment; Ash; Bleaching; Carbon; Fungi; Silicon compounds; Thermodynamics; adsorption; rice hull; rice hull ash; thermodynamics;
Conference_Titel :
Remote Sensing, Environment and Transportation Engineering (RSETE), 2011 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-9172-8
DOI :
10.1109/RSETE.2011.5965873
