An environmentally benign Fe-Ce-Ti mixed oxide catalyst, which was prepared via the hydrothermal method, has been investigated for the selective catalytic reduction of NO x with NH 3 (NH 3 -SCR). It was found that the Fe-Ce-Ti catalyst exhibited excellent NH 3 -SCR activity, high N 2 selectivity and strong resistance against H 2 O and SO 2 with a wide operation temperature window. XRD and Raman spectra suggest that the Fe-Ce-Ti catalyst has an amorphous structure. The co-presence of Fe and Ce induced the formation of a redox cycle (Ce 4+ + Fe 2+ ↔ Ce 3+ + Fe 3+ ), which promotes the activation of NO and NH 3 . In situ DRIFTS studies demonstrate that the synergetic effect between Fe and Ce contributes to the formation of reactive intermediate species, thus leading to the high catalytic deNO x performance of the Fe-Ce-Ti mixed oxide catalyst.Catal. Sci. Technol. This journal is

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Abstract-The bivalve Anodonta woodiana is widely distributed throughout Chinese freshwaters and is an important economic pearl mollusk. Recently, A. woodiana as a biomanipulation tool in Chinese lakes due to its strong suppression of phytoplankton, has been attracted increasingly more attention. In order to examine whether A. woodiana can exert grazing pressure on Microcystis and to evaluate the different effects of each algae diet on mussels' potential growth, a comparative study was carried out on the acute physiological responses to variable microalgae diets including toxic microcystin-producing cyanobacteria Microcystis aeruginosa and non-toxic green algae Scenedesmus obliquus. The values of filtration rate, absorption efficiency, oxygen consumption rate and ammonia excretion rate of A. woodiana were measured and finally the scope for growth (SFG) value as a measure of metabolic energy balance for A. woodiana was calculated and compared. The results showed that the mussel A. woodiana has a higher grazing ability on the toxic M. aeruginosa compared with the green algae S. obliquus; furthermore, the effects of different algae diets on SFG of A. woodiana demonstrated that the toxic M. aeruginosa may supply more energy for A. woodiana's potential growth. These results indicated that A. woodiana has strong adaptation ability when they were exposed to toxic Microcystis solution in this study, which implied that there is high application feasibility of A. woodiana as a toxic Microcystis-blooming controller in practice.Index Terms-Anodonta woodiana, microcystis aeruginosa, scenedesmus obliquus, scope for growth (SFG). I. INTRODUCTIONLake Taihu is the third largest freshwater lake in China and situated in the Yangtze delta. Since 1980's, however, the development of industry and agriculture in the lake region, as well as a rapid increase in the population has resulted in pollutants being produced and discharged into rivers and the lake. With the deterioration of inflow water quality, eutrophication and cyanobacterial blooms have occurred. Recently, cyanobacterial blooms have extended its coverage and persisted throughout the summer, which affected the function of the lake as a drinking water supply [1].

When ammonia is added in methane to form carbon films using thermal chemical vapor deposition, effects of the ammonia/methane ratio on the deposition rate and microstructures of carbon films are investigated. Meanwhile, effects of the deposition temperature, working pressure, and residence time on the deposition rate are also considered. Experimental results indicate that as the ammonia/methane rate increases, the deposition rate of carbon films decreases, and also, the ordered degree, nano-crystallite size, and sp2 carbon atoms of carbon films increase. Nevertheless, if the deposition temperature, working pressure, and residence time increase, the deposition rate of carbon films increases. The relationship between the deposition rate and deposition process parameters is formulated. The deposition process is controlled by the process to create mono-carbon and bi-carbon species in carbon films. Moreover, one mono-nitrogen will suppress about three mono-carbons to form carbon films. Few nitrogen and hydrogen atoms are incorporated into carbon films. The activation energy (507 kJ/mole) of carbon deposition is related to the activation energies of methane and ammonia dissociation. If the working pressure is smaller than a threshold value (30 kPa) or the residence time is shorter than a threshold value (1.5 s), no film is formed

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