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By Guodong Zhang, Shengguo Cheng

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Extra info for Advances in Environmental Engineering: Selected, Peer Reviewed Papers from the 2012 Global Conference on Civil, Structural and Environmental ... International

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1) Preparation of the catalyst Preparation of SiO2-shell: a certain amount of CaCO3, cetyltrimethylammonium bromide surfactant and ethanol were mixed together, then ammonia was added to adjust the pH to 10, followed by 100ml Si(OC2H5)4 ethanol solution. The resulting solution were stirred for 1 hour, stayed for a day, filtered, dried at 110°C, calcined at 600°C for 4h to get SiO2-CaCO3, which was further treated by dilute hydrochloric acid to remove CaCO3 completely to get SiO2-shell. Preparation of copper-based catalyst: A certain amount of Cu (NO3)2·3H2O, Mg(NO3)2·6H2O and Al(NO3)3·9H2O were dissolved in water, then the solution of the surfactant cetyl trimethyl ammonium bromide and silica-shell KOH was slowly added to precipitate.

In the similar procedure, 10% Ni / MgO, 10% Ni/TiO2, 10% of Ni/ZrO2, 10% Ni / of USY, 10% the Ni/γ- Al2O3 were prepared, respectively. 5g ZrO2 was added to 25ml above aqueous solution. The resulting solution was stirred at room temperature for 12h, evaporated at 80 °C and 100 °C for removing the water, and then was calcined at 800°C for 4h to give WOx-ZrO2. (2) Analysis of catalyst From the XRD patterns, NiO was highly dispersed on the surface of the carrier when the loading of Ni is in the range of 5-15%; while the surface of the carrier on Ni began to gather to microcrystalline when the loading of Ni is up to 20%.

8%, respectively. 2 Total mass concentrations along with distributions of particle grades for dicarboxylic acids As shown in Figure 2, the total mass concentrations of dicarboxylic acids in the fifth stage particulate matter are much higher than the other stages each month - this point is the same as fatty acids, but May is the most prominent month. In addition, mass concentrations of dicarboxylic acid in the third and the fourth stages of particulate matter are slightly higher than in the first and the second stages, but still be significantly lower than in the fifth stage each month.

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