The surface chemical structures and adsorption properties of three types of plant-based carbonaceous adsorbents: coconut-shell activated carbon(CAC4),sisal stalk-based activated carbon (SSAC) and sisal-based activated carbon fiber(SACF) were investigated on the basis of the previous study on their pore structures. The surface chemical structures were characterized by XPS, and the adsorption conducted onto these carbons included: liquid-phase adsorption of phenol, iodine and methylene blue; adsorption of organic solvent vapor; and the redox adsorption of Au3+ from aqueous solution. The results show that the three carbons contain several kinds of functional groups on the surface, and SACFSSACCAC4 in adsorption capacities. The adsorption property of carbonaceous adsorbent is determined by not only the pore structure, but also the functional groups on surface.

The pore structure and pore size distributions (PSDs) of three types of plant-based carbonaceous adsorbents: coconut-shell activated carbon(CAC4),sisal stalk-based activated carbon (SSAC) and sisal-based activated carbon fiber(SACF) were analyzed and characterized by different methods(HK, BJH, DR and DFT) according to their nitrogen adsorption isotherms. The results show that CAC4 is microporous and exhibits a narrow PSDs, in which the ultra-micropores under 0.7nm are dominant. The PSDs of SSAC and SACF are very alike. They both contain micropores, mesopores and some macropores, and their mesopore volumes are above 50% of total pore volume. SACF has even more mesopores and wider average pore size than SSAC. Although the three samples are of different porosities and modalities, their behaviors of adsorption could all be well-interpreted by multi-stage micropore filling mechanism.

The effects of reaction conditions on the redox absorption of Ce4+ onto viscose-based activated carbon fiber felt (VACF) were investigated in this work. The results show that although few cerium ions are absorbed on VACF, the reduction capacity of VACF towards Ce4+ is high and strongly depends on the concentration of Ce4+ , the ratio of solid/liquid, the pH value and the reaction temperature, etc. These factors can be interpreted by Nernst equation. After oxidation, the specific surface area and pore volume of VACF significantly decrease, but the total surface oxygen content is greatly improved. With increasing oxidant concentration, the redox capacity of VACF is enhanced. However, the O/C ratio on the surface of VACF is not changed obviously because the formation and releasing of CO2 increases at the same time.

Multiple of the antibacterial synthetic fibers were prepared by grafted with acrylonitrile and characterized. And they antibacterial cativity were evaluated by the improved shake flask method. The results show that these fibers have a better antibacterial activity, with good characteristics of broad spectrum, long lastingness and high effieicincy.