Preparation of Activated Carbons from Biomass and Their Adsorption of Benzene, Ammonia, Direct Red 23 and Iron Ions

Three activated carbons were prepared from biomass (agriculture and wood industry by-products) and subsequently modified by treatment with liquefied petroleum gas at 900°C. The primary properties of the activated carbons before and after modification were investigated by nitrogen adsorption isotherm...

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Bibliographic Details
Main Authors: Bo Meng, Wenzhong Shen, Qingjie Guo
Format: Article
Language:English
Published: Hindawi - SAGE Publishing 2008-04-01
Series:Adsorption Science & Technology
Online Access:https://doi.org/10.1260/026361708786036061
Description
Summary:Three activated carbons were prepared from biomass (agriculture and wood industry by-products) and subsequently modified by treatment with liquefied petroleum gas at 900°C. The primary properties of the activated carbons before and after modification were investigated by nitrogen adsorption isotherms and FT-IR techniques. Modification of the activated carbons by liquefied petroleum gas led to a significant decrease in the content of micropores with diameters less than 1 nm. The prepared activated carbons exhibited improved adsorption capacities towards benzene due to their non-polar surface chemical groups and narrower micropore distributions; however, their adsorption capacities towards ammonia were diminished. The adsorption extent of iron ion was determined by the surface chemical properties of the activated carbons and showed a smaller relationship to the pore volume. The adsorption extent of Direct Red 23 was influenced by micropore sizes in the range 1–1.5 nm.
ISSN:0263-6174
2048-4038