Surface modification of γ-Al2O3 nano-particles with gum arabic and its applications in adsorption and biodesulfurization

Gamma-Al2O3 nano-particles were synthesized and modified using gum arabic (GA) to avoid agglomeration in aqueous solutions. Its effect on adsorptive desulfurization and biodesulfurization was also evaluated. Results showed that gamma-Al2O3 nano-particles dispersed well in aqueous solutions after GA...

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Bibliographic Details
Published in:Surface & coatings technology 2007-05, Vol.201 (16-17), p.6917-6921
Main Authors: Zhang, HuaiYing, Shan, GuoBin, Liu, HuiZhou, Xing, JianMin
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Other topics in materials science
Physics
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Summary:Gamma-Al2O3 nano-particles were synthesized and modified using gum arabic (GA) to avoid agglomeration in aqueous solutions. Its effect on adsorptive desulfurization and biodesulfurization was also evaluated. Results showed that gamma-Al2O3 nano-particles dispersed well in aqueous solutions after GA modification. The adsorptive desulfurization capacity of gamma-Al2O3 nano-particles was increased from 0.56mmol S/g (Al2O3) to 0.81mmol S/g (Al2O3) after GA modification. Compared with unmodified gamma-Al2O3 nano-particles, the biodesulfurization rate by adsorbing GA modified gamma-Al2O3 nano-particles onto the surfaces of Pseudomonas delafieldii R-8 cells was increased from 17.8mmol*kg-1*h-1 to 25.7mmol*kg-1*h-1. This may be due to improvement in the dispersion and biocompatibility of gamma-Al2O3 nano-particles after GA modification.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2006.11.043