Role of molecular structure on bioelectrochemical reduction of mononitrophenols from wastewater

The effect of nitro-substituent on mononitrophenol (o-nitrophenol (ONP), m-nitrophenol (MNP) and p-nitrophenol (PNP)) reduction in a bioelectrochemical system (BES) was investigated in this study. The results show that the removal of all three nitrophenols was significantly enhanced with more negative cathode potential and shortened hydraulic retention time in the BESs. Moreover, the reduction of the three nitrophenols followed in the order of ONP > MNP > PNP in the BESs. Both quantum chemical calculation using density function theory and cyclic voltammetry analysis confirmed the reductive sequence of the three nitrophenols. In addition, the acute toxicity of nitrophenol effluent significantly decreased while its biodegradability was enhanced after treatment in the BES. Therefore, the BES technology offers bright prospects for efficient treatment of nitrophenol-containing wastewater.     

A modeling approach to describe ZVI-based anaerobic system

Zero-valent iron (ZVI) is increasingly being added into anaerobic reactors to enhance the biological conversion of various less biodegradable pollutants (LBPs). Our study aimed to establish a new structure model based on the Anaerobic Digestion Model No. 1 (ADM1) to simulate such a ZVI-based anaerobic reactor. Three new processes, i.e., electron release from ZVI corrosion, H₂ formation from ZVI corrosion_, and transformation of LBPs, were integrated into ADM1. The established model was calibrated and tested using the experimental data from one published study, and validated using the data from another work. A good relationship between the predicted and measured results indicates that the proposed model was appropriate to describe the performance of the ZVI-based anaerobic system. Our model could provide more precise strategies for the design, development, and application of anaerobic systems especially for treating various LBPs-containing wastewaters.     

环境友好为切入点的基层中医医疗环境建设研究——以河源市中医院建筑改扩建工程为例

河源市中医院新院建筑改扩建工程设计,是以环境友好概念为切入点而制定相关的设计原则。不仅要坚持以改造建设为主要,有重点、有节制地介入医疗建筑的设计思路,而且在保护传统中医文化的同时,努力改善以病人为中心医疗环境和就诊条件的设计方法,从而实现基层中医医疗环境建设走向良性循环的发展道路。     

广州西江引水工程盾构法关键技术的应用

结合广州市西江引水工程输水隧道建设经验,总结了输水隧道盾构法建设中需要突破的若干关键技术,可供类似工程设计参考借鉴,以推动深层城市排水、输水隧道的技术进步。     

武汉经开万达广场CloudMAX云智能管理系统的应用

本文主要介绍了深圳新基点基于自身产品升级开发的CloudMAX云智能管理系统在武汉经开万达广场的应用,包括系统结构、应用特点和主要实现功能。     

关中城镇群低碳城镇化发展框架及推进路径研究

为应对全球性环境问题,低碳理念应运而生。美国、欧盟、德国、英国等所有发达国家都在积极倡导和实践低碳经济,全球低碳化已经成为一种趋势。关中城镇群作为西部地区重要的经济区,近年来虽然城镇化发展速度明显,但在城镇化发展的质量和内涵上离发达城镇群建设仍有很大的差距,尤其在低碳城镇化建设方面,其特色和优势并没有得到具体的彰显。因此,在国家新型城镇化规划及共建丝绸之路经济带的时代背景下,再次审视关中城市群的现实责任,探索城市群发展新思路,对于带动丝绸之路经济带沿线城市群培育,引领我国中西部地区城市群发展具有重要的指导意义和积极的示范作用。     

新型城镇化的城镇群战略解析

我国城市群的发展都还停留在基础建设阶段,在能够推动实质性的经济发展方面还存在严重不足,多数城市群其实只是在空间分布上相对集中的“一群城市”,而不是具有核心竞争力的“城市群”。在新型城镇化过程中,提升小城镇之间的勾连效率、提升城市群的核心竞争力是推动我国城镇化发展的重要课题。     

桥梁施工中预应力施工技术的应用探析

预应力施工技术在道路桥梁施工建设中得到了广泛的应用,在桥梁施工中不仅可以对建材的强度进行有效地利用,同时还能进一步减轻桥梁结构的自重,提升桥梁的跨度。本文分析了预应力施工技术在桥梁工程建设中的应用。     

Niche comparisons: toward a new approach for analysing competition and organizational performance in the international construction market

Over the past few decades, studies on competition and organizational performance in the international construction market have been prolific. Construction companies are founded, then grow, compete, evolve, and die in the international landscape, a common process from an ecological perspective. However, few studies have considered the international construction market from this perspective. Using niche theory, which was initially populated in the field of natural bio-ecology and then introduced to business management and economics, a NW/O-L (niche width/overlap and location) framework is established in this study. With this framework, the niche evolution of the top 225 international contractors is explored along two dimensions—product and geography. The effects of a proper niche on an international construction company’s performance are also investigated using the cluster analysis method. It was discovered that, despite fluctuations over time, the contractor’s niche is highly related to its performance in the international construction market. The most appropriate niche for international construction contractors is a wide niche width, with a small niche overlap and with its location near to the market centre with comparatively more market resources. However, only a few contractors can survive in this niche, as the majority of contractors are in a narrow niche width, with a comparatively large niche overlap and far from the market centre. Contractors which do not fit either of these two niches have proved to be poor performers in this study.     

“潮客交融”城镇地域建筑的文化解读与风貌重塑——以梅州市阝留隍镇为例

作为"潮"、"客"文化交融的典型代表,梅州市丰顺县留隍镇面临着典型文化缺失、城镇地域建筑风貌缺乏特色的困境。该文通过对阝留隍镇建筑风貌现状分析和典型"潮"、"客"元素的文化解读,强调对具有地域建筑特色的小城镇风貌的重塑是新型城市化背景下文化传承应坚守的重要内容,提出了相应的规划设计与街景整治策略。