Production and adsorption properties of activated charcoal from Bambusa sinospinosa
[Objective]This study,with an investigation of the production process and application fields of activated charcoal of Bambusa sinospinosa,is aimed to make full use of B.sinospinosa,improve its utilization rate,and improve its added value.[Method]First,with B.sinospinosa charcoal used as the raw material,steam activation method as well as single factor experiment were employed to explore the effect of temperature,time,steam vapour amount on the yield of B.sinospinosa activated charcoal and its adsorption performance.Then,Fourier infrared absorption spectrometer(FTIR),X-ray diffractometer(XRD),specific surface area and porosity analyzer(BET),scanning electron microscope(SEM)and other testing instruments were utilized to test and characterize the prepared activated charcoal of B.sinospinosa.[Result](1)The activation process of the B.sinospinosa activated charcoal was optimal when activation temperature was 875℃,activation time was 2.0 h while steam vapour amount was 0.50 L·h-1 under which the yield of activated carbon was 29.07%,the strength was 97.68%,the adsorption value of iodine was 1 235.03 mg·g-1,and the methylene blue adsorption value was 276 mg·g-1,making a favorable adsorption performance.(2)The infrared absorption spectra showed that the absorption peaks started to weaken at 3 130,3 010 and 1 670 cm-1 until they disappeared at 876,809 and 747 cm-1 but the main peaks persisted;XRD analysis showed that the activated carbon contained graphite α-axis structure and as shown by surface area test and electron microscope observation,the pore volume and pore size of activated carbon activated by the optimal process were developed,with the total pore volume,the micropore volume,the average pore size and the BET specific surface area being 0.489 cm3·g-1,0.388 cm3·g-1,23.378 nm,and 837.005 m2·g-1 respectively.[Conclusion]The B.sinospinosa activated charcoal prepared by the optimal activation process had good performance and could be used on various occasions such as adsorption and decontamination.[Ch,5 fig.1 tab.27 ref.]
Bambusa sinospinosaactivated charcoalsteam activationadsorption propertyactivation process
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