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Hou M.-F.,South China University of Technology | Hou M.-F.,Guangdong Institute of Eco environmental and Soil Sciences | Ma C.-X.,State Intellectual Property Office | Zhang W.-D.,South China University of Technology | And 3 more authors.
Journal of Hazardous Materials | Year: 2011

The iron-pillared bentonite (Fe-Ben) was prepared by ion-exchange using the natural bentonite (GZ-Ben) from Gaozhou, China, at room temperature without calcination. Both Fe-Ben and GZ-Ben were characterized by X-ray diffraction, N2 adsorption and Fourier transform infrared spectroscopy. The results show that the d(001) value and surface area of the bentonite material increased after iron pillaring. Fe-Ben adsorbed much more Rhodamine B (RhB) than GZ-Ben, which can be ascribed to the special surface properties and large surface area of Fe-Ben. The optimum pH value for the adsorption of RhB on Fe-Ben is 5.0. The adsorption of RhB onto Fe-Ben can be well described by the pseudo-second-order kinetic model and the intraparticle diffusion kinetic model. The adsorption isotherm of RhB onto Fe-Ben matches well with the Langmuir model. © 2010 Elsevier B.V.

Yang D.X.,Chinese Institute of Crustal Dynamics | Yang D.X.,Japan Research Institute of Innovative Technology for the Earth | Zeng R.S.,CAS Institute of Geology and Geophysics | Zhang Y.,Japan Research Institute of Innovative Technology for the Earth | And 3 more authors.
Clean Technologies and Environmental Policy | Year: 2012

In this article, according to in situ geological and geophysical data archived of Daqingzijing oilfield, a 3D multiphase flow model based on hydrodynamic trapping mechanism is set up, with the phase interface mechanism considered. A high-order CE/SE (space-time conservation element and solution element) method coupled with (HPLS) Hybrid level-set method is updated to simulate migration and build-up of CO 2 in saline aquifers for short-term time scales. Results revealed that both the lateral variation of stratigraphic thickness and the heterogeneity of permeability control migration and accumulation of CO 2 plume. After 20 years of injection, CO 2 front propagates 8-9 km away from injection wells. The saline aquifer formation with high permeability is the dominant channel for CO 2 migration. The present work provides a novel approach for simulation of hydrodynamic trapping mechanism for CO 2 geological storage in saline aquifers of Songliao Basin of China, which could be a suitable location for a CO 2 storage demonstration project. © Springer-Verlag 2011.

Hao H.,China Agricultural University | Feng J.G.,Yangzhou University | Guo X.Y.,China Agricultural University | Liu W.J.,State Intellectual Property Office | Wu X.M.,China Agricultural University
Advanced Materials Research | Year: 2014

Some factors such as imidacloprid dose, contact time, initial NNO concentration, stirring speed and temperature affecting the dispersant NNO (formaldehyde condensate sodium salt of naphthalene sulfonic acid) adsorption on imidacloprid particle was investigated in this paper. It demonstrated that NNO adsorption amount decreased with the increasing imidacloprid dose and temperature, but increased with the increasing contact time, initial NNO concentration and stirring speed. The results implied that the dispersant NNO was adsorbed on imidacloprid particle physically and exothermically. © (2014) Trans Tech Publications, Switzerland.

Hao H.,China Agricultural University | Feng J.G.,Yangzhou University | Chen W.T.,China Agricultural University | Liu W.J.,State Intellectual Property Office | Wu X.M.,China Agricultural University
Advanced Materials Research | Year: 2014

In order to investigate the feasibility of using methacrylic acid (MAA)-styrene (St) copolymer as dispersants to disperse azoxystrobin particles in aqueous suspension, the adsorption kinetics, isotherm and thermodynamics of MAA-St copolymer onto azoxystrobin particle surfaces were studied by batch equilibrium experiments. The results showed that the adsorption process followed the pseudo-second-order kinetic model with the entire adsorption, adsorption rate decreased with the initial concentration of MAA-St copolymer increasing. The equilibrium data were fitted with Langmuir isotherm equation better. The thermodynamic parameters were calculated, which indicated that the adsorption was a spontaneous and exothermic process in nature, and higher temperature is not beneficial to that adsorption process. © (2014) Trans Tech Publications, Switzerland.

Zhu W.,Zhejiang University of Technology | Zheng Y.,Zhejiang University of Technology | Chen P.,Zhejiang University of Technology | Xie J.,State Intellectual Property Office
Journal of Electronic Imaging | Year: 2014

Multiview video coding (MVC) is a recent extension of H.264/AVC, and it consumes huge encoding time to select the optimal macroblock (MB) mode, among different size candidate modes. As compared with the small-size mode (Inter16 × 8, Inter8 × 16, Inter8 × 8, Intra8 × 8, and Intra4 × 4), the large-size mode (Skip/Direct, Inter16 × 16, and Intra16 × 16) occupies most of the MB mode proportion with much less computational complexity. Thus, if the large-size mode could be early decided as the optimal MB mode, the complexity of mode decision could be effectively reduced. In this work, an early large-size mode decision algorithm is proposed based on the global correlation of rate-distortion (RD) costs between neighbor views and the local correlation of RD costs among candidate modes. Average RD costs of large-size and small-size MB modes in the neighbor view are employed as a global reference for the threshold of early decision. And RD costs of estimated modes are used to calculate the local adjustment for the threshold. Experimental results demonstrate that the proposed algorithm can significantly reduce the whole encoding time while maintaining an RD performance similar to that of the original MVC encoder. © The Authors.

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