Carbonaceous adsorbents from single and mixed rubber and 1 plastic wastes . Adsorption of methylene blue 2 3

12 From rubber of used tires (TR), plastic bottle(PET) and automobile industry EPDM/PP 13 rubber/plastic (VR) both separately and as 1:1 binary and 6:1:1 ternary mixtures, 14 carbonaceous adsorbents (CAs) were first prepared by heat treatment at 900 oC in N2 or 15 at 850 oC in steam, then characterized by the adsorption of N2 at -196 oC and mercury 16 porosimetry, and eventually tested as adsorbents of methylene blue (MB) in aqueous 17 solution.Yield is markedly higher with TR and similar with PET and VR, ranging 18 between 40.1% and 11.1%. Using mixtures instead of the individual components in the 19 preparation of CAs, significant mass changes occur, this proving that the starting 20 materials interacted with each other during the preparation of CAs. In the case of PET 21 and VR, it causes a substantial mass loss. As far as porosity is concerned, the trend is to 22 an increase in macroporosity with VR, mesoporosity with TR and macro-, mesoand 23 microporosity with mixed PET. Adsorption data for MB fit better to a pseudo-second24 order kinetics than to a pseudo-first-order kinetics and to the Langmuir equation than to 25