Dadu River is an important tributary of the Yangtze River in China. The Shuangjiangkou Hydropower Station is the control reservoir upstream of the main trunk of Dadu River. Located in the Aba Tibetan and Qiang Autonom...Dadu River is an important tributary of the Yangtze River in China. The Shuangjiangkou Hydropower Station is the control reservoir upstream of the main trunk of Dadu River. Located in the Aba Tibetan and Qiang Autonomous Prefecture of Sichuan Province, the project is mainly aimed at power generation and flood control.展开更多
Phosphate removal from aqueous waste streams is an important approach to control the eutrophication downstream bodies of water. A Fe（Ⅲ） coordinated amino-functionalized silicate adsorbent for phosphate adsorption w...Phosphate removal from aqueous waste streams is an important approach to control the eutrophication downstream bodies of water. A Fe（Ⅲ） coordinated amino-functionalized silicate adsorbent for phosphate adsorption was synthesized by a post-grafting and metal cation incorporation process. The surface structure of the adsorbent was characterized by X-ray diffraction, N2 adsoropion/desoprotion technique, and Fourier transform infrared spectroscopy. The experimental results showed that the adsorption equilibrium data were well fitted to the Langmuir equation. The maximum adsorption capacity of the modified silicate material was 51.8 mg/g. The kinetic data from the adsorption of phosphate were fitted to pseudo second-order model. The phosphate adsorption was highly pH dependent and the relatively high removal of phosphate fell within the pH range 3.0-6.0. The coexistence of other anions in solutions has an adverse effect on phosphate adsorption; a decrease in adsorption capacity followed the order of exogenous anions： F^- 〉 SO4^2- 〉 NO3^- 〉 Cl^-. In addition, the adsorbed phosphate could be desorbed by NaOH solutions. This silicate adsorbent with a large adsorption capacity and relatively high selectivity could be utilized for the removal of phosphate from aqueous waste streams or in aquatic environment.展开更多
In view of the difficulties in promoting intelligent management in the field of engineering construction,based on the concept of intelligent enterprise and the actual situation of hydropower project-construction manag...In view of the difficulties in promoting intelligent management in the field of engineering construction,based on the concept of intelligent enterprise and the actual situation of hydropower project-construction management,this paper puts forward the basic concept,main features and general idea of intelligent engineering.Based on a review of the exploration,pilot construction and comprehensive practice of intelligent engineering in the hydropower construction of Dadu River,the practical results of the intelligent engineering of Dagangshan,Houziyan,Shaping-II and Shuangjiangkou hydropower stations are summarized.The technical system and management model of engineering an early-warning decision centre,intelligent dam project,intelligent underground project,intelligent electromechanical project,intelligent security control,intelligent service guarantee,intelligent environmental and water protection,and intelligent resource control in Shuangjiangkou hydropower station are introduced.It is proposed that intelligent engineering is a high integration of information technology,industrial technology and management technology.And it is pointed out that intelligent engineering will lead in the new development of water conservancy and the hydropower industry,and even the engineering-construction field,throughout the world.展开更多
文摘Dadu River is an important tributary of the Yangtze River in China. The Shuangjiangkou Hydropower Station is the control reservoir upstream of the main trunk of Dadu River. Located in the Aba Tibetan and Qiang Autonomous Prefecture of Sichuan Province, the project is mainly aimed at power generation and flood control.
基金supported by the National Major Research Plan for Water Pollution Control and Treatment of China(No. 2009ZX07101-015,2009ZX07105-003)
文摘Phosphate removal from aqueous waste streams is an important approach to control the eutrophication downstream bodies of water. A Fe（Ⅲ） coordinated amino-functionalized silicate adsorbent for phosphate adsorption was synthesized by a post-grafting and metal cation incorporation process. The surface structure of the adsorbent was characterized by X-ray diffraction, N2 adsoropion/desoprotion technique, and Fourier transform infrared spectroscopy. The experimental results showed that the adsorption equilibrium data were well fitted to the Langmuir equation. The maximum adsorption capacity of the modified silicate material was 51.8 mg/g. The kinetic data from the adsorption of phosphate were fitted to pseudo second-order model. The phosphate adsorption was highly pH dependent and the relatively high removal of phosphate fell within the pH range 3.0-6.0. The coexistence of other anions in solutions has an adverse effect on phosphate adsorption; a decrease in adsorption capacity followed the order of exogenous anions： F^- 〉 SO4^2- 〉 NO3^- 〉 Cl^-. In addition, the adsorbed phosphate could be desorbed by NaOH solutions. This silicate adsorbent with a large adsorption capacity and relatively high selectivity could be utilized for the removal of phosphate from aqueous waste streams or in aquatic environment.
文摘In view of the difficulties in promoting intelligent management in the field of engineering construction,based on the concept of intelligent enterprise and the actual situation of hydropower project-construction management,this paper puts forward the basic concept,main features and general idea of intelligent engineering.Based on a review of the exploration,pilot construction and comprehensive practice of intelligent engineering in the hydropower construction of Dadu River,the practical results of the intelligent engineering of Dagangshan,Houziyan,Shaping-II and Shuangjiangkou hydropower stations are summarized.The technical system and management model of engineering an early-warning decision centre,intelligent dam project,intelligent underground project,intelligent electromechanical project,intelligent security control,intelligent service guarantee,intelligent environmental and water protection,and intelligent resource control in Shuangjiangkou hydropower station are introduced.It is proposed that intelligent engineering is a high integration of information technology,industrial technology and management technology.And it is pointed out that intelligent engineering will lead in the new development of water conservancy and the hydropower industry,and even the engineering-construction field,throughout the world.
