Fabrication and photocatalytic performance of one-dimensional Ag3PO4 sensitized SrTiO3 nanowire

The 1D Ag₃PO₄ sensitized SrTiO₃ nanowires are prepared by simple route of electrospinning-in situ deposition technique. The results of the thermogravimetry (TG), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive Spectrometer (EDS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UV–Visible diffuse reflectance spectroscopy (UV–Vis) indicate that the Ag₃PO₄ nanoparticles has been deposited on the surface of the SrTiO₃ nanowires successfully. Experimental results showed that compared with pure SrTiO₃, the as-prepared 1D Ag₃PO₄ sensitized SrTiO₃ nanowires exhibit obvious enhancement of photocatalytic performance and stability. Especially, the Ag₃PO₄/SrTiO₃ (3AS sample) had a satisfactory photocatalytic activity for degrading methylene blue (MB) more than 98% under visible light irradiation. As to pure SrTiO₃ and Ag₃PO₄, only 9.8% and 49% of MB was decomposed after 35?min irradiation respectively. Furthermore, the mechanism of the enhancing photocatalytic activity could be ascribed to the nano-heterojunction of the Ag₃PO₄/SrTiO₃, the visible light response of the Ag₃PO₄, and the 1D structure of the nanowires.     

法国洛代夫铀水冶厂工艺流程的改进——碱性浸出剂再生及溶液返回法

洛代夫铀水冶厂原采用加压碱法浸出和直接沉淀的流程从矿石中回收铀。本文叙述了作者为改进洛代夫铀水冶厂的生产，提出的碱性浸出剂再生和溶液循环的新方法。在不必更新和增加设备的条件下，改进了该厂的生产工艺流程，提高了经济效益，降低了生产成本。该方法已直接用于洛代夫厂的生产中，并为该厂节省至少每年1400万法郎的操作费用。     

矿产资源综合利用现状与发展的研究

在综合分析我国矿产资源特点的基础上，结合国内固体矿产资源综合利用中取得的成就和存在的不足，提出矿产资源综合利用必须树立循环经济的新理念，建立起多学科、跨行业的绿色工业生态系统，更好地节约矿产资源，促进工业和社会的可持续发展。     

煤矿区发展循环经济的模式构建与探索

通过阐述煤矿区发展面临的问题，根据循环经济的理论内涵，分析煤矿区发展循环经济的优势所在；在煤矿区循环经济模式的初步实践基础上，探讨发展生态旅游、构建生态网链、推进科技创新、建立环境与循环经济信息网络等循环经济发展方向。     

KMLZ斜窄流沉渣除油器的应用

介绍了KMLZ斜窄流沉渣除油器的工作原理、结构特征及其在工业污水中的应用。从斜板的原理及结构上分析其除油、除渣效果的高效性。     

Recycle effect on the relative exergy array

Since the eco-efficiencies of all industrial processes/plants have become more and more important, engineers need to find a way to integrate process design, process control and measurements of eco-efficiency. The thermodynamic concept of Exergy can be used to analyze a process in terms of its efficiency. The Relative Exergy Array (REA) that measures both the relative exergetic efficiency and the controllability of a process has been proposed by Montelongo-Luna et al. (2011). The REA can be used for quick comparison between several process/control structure candidates. It is very common that the industrial unit/process includes some recycle loops. The recycle effect on REA is investigated in this paper through two process case studies. Simulation results show that the REA without consideration of the recycle loop may mislead the selection of control configuration. Recycle loop should be considered for selection of control configuration.     

Counter-current Electrophoresis

Abstract

Historical development, principal operation, different ways of experimental realization, and typical examples of application of countercurrent electrophoresis are reviewed. The separation process is principally capable of being applied to all types of ions, as far as any difference is shown in their ionic behavior. Different types of columns can be adapted to varying amounts of substance from approximately 10^?6 mole up to several moles (in the laboratory scale). The production of high purity components and the use of the column as an absolute ion filter are further possible applications.     

2010年上海世博会日本产业馆结构“再利用”概念设计

2010年上海世博会日本产业馆建于原江南造船厂船体联合车间内,其结构设计贯彻"再利用"理念,采用新建柱下独立基础与原有厂房混凝土地坪协同工作的基础形式,钢结构连接节点尽量采用可拆卸的高强螺栓,使用过程中保留脚手架钢管作为结构抗侧力构件,实现了世博会多样化建筑特色、"再利用"基本理念、绿色环保以及结构设计经济安全的有效结合。     

A global optimal formulation for the water integration in eco-industrial parks considering multiple pollutants

A mathematical programming formulation for the water integration in eco-industrial parks considering streams with several pollutants is presented. The formulation is based on a superstructure that allows the wastewater reuse in the same plant, the water exchange with different plants, and a shared set of interceptors that must be selected to determine the network configuration that satisfies process equipments and environmental constraints. The model formulation considers wastewater with several pollutants, and optimizes the network according to the minimum total annual cost, which includes the costs of fresh water, piping and regeneration. A new discretization approach is also proposed to handle the large set of bilinear terms that appear in the model in order to yield a near global optimal solution. The results obtained in several examples show considerable savings with respect to the solutions of the individual plant integration policy commonly employed for these types of problems.     

四川非常规气田开发主要钻井技术及其应用效果

随着油气勘探开发难度不断加大,尤其是近年来非常规气田的开发,定向钻井成为钻井主流技术,如何有效控制钻井成本和保护环境并防止井下事故的发生成为作业者必须面对的问题。为此,自2010年以来,在荷兰皇家壳牌集团(中国)四川非常规气项目50余井次的钻井工作中,运用了旋转导向技术、新型钻井液配方、钻井液回收技术和固控配套技术,取得了快速、安全、环保的应用效果,其中DXXX井应用旋转导向钻井,实现完钻井深5 729 m,水平段长1 418 m,钻井周期105 d,同比螺杆钻水平井节约时间65 d,钻井工程创下了该区新纪录。尤其是针对不同地层特点,兼顾环保要求,成功研制和应用了新型钻井液配方、固控和钻屑处理技术,取得了较好的环保效果。结论认为,上述配套技术的应用对提高钻遇产层成功率、提高钻井速度、缩短钻井周期、控制钻井成本、获得更好的经济效益和社会效益,具有重要的保障作用。