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Chitosan derivative nano-nitro-acetophenone was prepared by Schiff base reaction. The nano nitro-acetophenone was impregnated with CuO-CeO2-Al2O3and CuO-CeO2-Fe2O3 nanocomposite to fabricate new organic-metal oxides nanocomposite of Chitosan-4-nitroacetophenone/CuO-CeO2-Al2O3 (NCCA) and Chitosan-4-nitroacetophenon/CuO-CeO2-Fe2O3 (NCCF). The new organic-metal oxides nanocomposite were prepared by wet impregnation technique, characterised by XRD, TEM, SEM, FTIR and TGA analysis, and used as an adsorbent for industrial disperse red 60 dye from wastewater. Dye adsorption isotherms, kinetics, thermodynamics, the effect of contact time and initial dye concentration, temperature, pH and adsorbent dosage were investigated. The reusability of NCCF and NCCA on dye removal was also studied. The results indicated that the dye removal% generally increased with decreasing dye initial concentration. The removal % decreased by increasing NCCF dosage while it increase by increasing the NCCA dosage from 0.05 to 0.1 g and after that it decreases again. The dye removal % increase with increasing temperature from 20°C to 80°C for NCCF adsorbent, while, it decreased at high temperature for NCCA adsorbent. Also, it decreased with increasing the initial pH of the solution from 2 to 8 for NCCF adsorbent. For NCCA adsorbent the percentage removal was increased with increasing the initial pH of the solution from 2 to 4 and after that it decrease again. The results showed also that NCCA was good reusable adsorbent, while, NCCF is not preferred for reuse for the same propose. The adsorption isotherm of dispersed red 60 dye onto NCCF and NCCA almost agreed with Langmuir isotherm and pseudo-second-order kinetics. The maximum amount of adsorbed dye is 92.8 and 88.5 mg/g onto NCCF at pH 2 and NCCA at pH 4, respectively. The thermodynamic results showed that the adsorption of disperse red 60 dye onto NCCF and NCCA is spontaneous, physical and endothermic adsorption process. [ABSTRACT FROM AUTHOR]

The graft polymerization of acrylonitrile (AN) or acrylic acid (AA) onto ethylene-propylene-diene terpolymer rubber (EPDM) was carried out in toluene, using dibenzoyl peroxide (BPO) as an initiator. The synthesized AN--g--EPDM and AA--g--EPDM were characterized by FT-IR spectroscopy and thermal gravimetric analysis (TGA). AN--g--EPDM and AA--g--EPDM were incorporated into chloroprene rubber (CR)/EPDM and butadiene acrylonitrile rubber (NBR)/EPDM blends. The compatibility of EPDM/CR and EPDM/NBR blends was examined with scanning electron microscope (SEM) and differential scanning calorimetry (DSC). The physico-mechanical properties of the vulcanizates were investigated after and before thermal aging. AN--g--EPDM and AA--g--EPDM improved the morphology of CR/EPDM and NBR/EPDM rubber blends. The mechanical properties illustrate that the compatibilized blends possessed good thermal stability. [ABSTRACT FROM AUTHOR]