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Yang Y.,Hunan University | Yang Y.,Central South University of forestry and Technology | Wu W.,Hunan University | Wang Q.,China Nuclear Industry Huaxing Construction Co. | And 3 more authors.
Journal of Electroanalytical Chemistry | Year: 2016

Anodic electrochemiluminescence (ECL) emission was for the first time observed from noble metal nanoparticles under coreactants. In this work, we present a novel ECL sensor based on Pt nanoclusters/graphene (Pt NCs/GR) hybrid with triethanolamine (TEA) as the coreactant for the trace detection of copper ion (Cu2 +). GR significantly enhanced the anode ECL signal, due to its superior electron conduction. The ECL intensity could be greatly weakened by addition of Cu2 +. The proposed protocol offered a highly sensitive, selective and recyclable method for detection of Cu2 + with a wide linear range from 1.0 × 10- 4 to 2.0 × 10- 1 mg/L and a low detection limit of 1.0 × 10- 4 mg/L. Furthermore, the practicability of the ECL sensor in real water sample was also tested, showing that the ECL sensor based on Pt NCs/GR could be a promising alternative method for the monitoring of the Cu2 + in real sample. © 2016 Elsevier B.V. All rights reserved. Source

Yu X.-N.,Dalian Jiaotong University | Yang Y.-Y.,Dalian Jiaotong University | Wang J.-G.,China Nuclear Industry Huaxing Construction Co.
Hedongli Gongcheng/Nuclear Power Engineering | Year: 2013

The whole modular hoisting of concrete slab is a major hoisting project for construction of nuclear power plants. Concerning the actual situation that the geometric center of concrete slab modules in nuclear power plants are deviated from gravity, a specific hoisting connection system is designed considering present hoisting points, which used welded H-beam lifting frame and a series of research is accomplished, which contained calculating the bary centre of concrete base module, establishing the mathematical model with ANSYS software to analyze the stress and displacement of the hoisting frame, hanging ears and pin wheel. The results show that the H-beam welding lifting frame structure is reliable and the lifting parameter design is reasonable. The overall hoisting task is completed by using mobile cranes, hydraulic jacking towers, hoisting beams, connecting hoisting frames, Loxic-leveling and other complex processes. Source

Shi C.,Dalian Jiaotong University | Wang J.,China Nuclear Industry Huaxing Construction Co. | Jin C.,Dalian Jiaotong University | Meng Q.,Dalian Jiaotong University
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | Year: 2013

Steel lining of nuclear power station implementing modular design, need dividing the circumference of cylinder of steel lining into a number of plate modules, and each module of cylinder is assembled and welded integrally after individually welding, but the radial welding displacement of plate edge of cylinder is not more than 2 mm. Therefore, by using the software of ABAQUS, the welding deformation of plate of cylinder are simulated with pre-stress, and design pre-stress tooling structure by oneself, test pre- stress of plate of cylinder and the radial deformation after welding. The results indicate that the welding process that firstly welding the axial angle steel, then exerting the pre-stress, lastly welding the circumferential angle steel, can obviously reduce the radial deformation of plate edge of cylinder, with the increment of pre-stress welding deformation is decreasing exponentially. When the top lift of oil cylinder reaches 18 MPa, the radial deformation of palate edge can control within 2.0 mm. © 2013 Journal of Mechanical Engineering. Source

Qiu D.-B.,Suzhou University of Science and Technology | Zhao K.-Q.,Nanjing Institute of Environmental Sciences | Zhang H.-H.,Nanjing Institute of Environmental Sciences | Sun Q.-F.,Nanjing Institute of Environmental Sciences | And 3 more authors.
Journal of Ecology and Rural Environment | Year: 2013

Composite of slag from garbage incinerators and residual sludge from wastewater treatment plants is proved to be a cost-effective adsorbent high in P adsorption capacity. This technology has opened up a field for recycling of the slag and sludge. Compared with the Freundlich model, the Langmuir model could better simulate phosphorus adsorption capacity of the adsorbent. Calculation using the Langmuir model shows that maximum phosphorus adsorption capacity of the adsorbent varied with ratio of its composition. It was 27 300 and 13 750 mg · kg-1, 54.6 and 27.5 times greater than that of zeolite, respectively, when its composition ratio was 4:1 and 1:1. The composite adsorbent was significantly lower than zeolite in P desorption rate. Neither initial P concentration nor pH in the solution had much effect on P desorption rate of the composite adsorbent, indicating that the composite adsorbent is applicable to solutions wide in pH range. Extraction tests show that the adsorbent is low in heavy metal extraction rate, safe to the environment and good in performance. To sum up, the composite adsorbent composed of slag from garbage incinerators and sludge from wastewater treatment plants is both high in P adsorption capacity and saturated adsorption, but low in desorption rate. It is, therefore, an ideal phosphate adsorbing filling. Source

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