Fabrication of three bio-adsorbents from different parts of rape straw

In this paper, three kinds of bio-adsorbents are fabricated from the different parts of rape straw, which are adsorbent-core, adsorbent-hull, and adsorbent-stalk, respectively. As the adsorbates, kerosene, paraffin, rapeseed oil and dibutyl phthalate are employed to evaluate the adsorption performance of the three kinds of bio-adsorbents. The results suggest that the three bio-adsorbents exhibit very different adsorption properties. The bio-adsorbent of adsorbent-core has much higher adsorption quantity to all of the four adsorbates than the other two bio-adsorbents. The adsorption mechanism of the three bio-adsorbents is investigated. The results illustrate that different bio-adsorbents own different micro-morphologies. The special micro-chamber structure is found in bio-adsorbent of adsorbent-core, which is seen as the main reason of owning excellent adsorption performance. The adsorption volume of unit mass (Va) was proposed to evaluate the intrinsic adsorption properties of the bio-adsorbents. The recovery performance of the bio-adsorbents by using of two different treatment methods is investigated. The effect of treatment on recovery rate is discussed.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author