我国清洁生产现状和发展思路

介绍了我国推行清洁生产的进展和存在的问题，提出了推进清洁生产应遵循的基本原则和应从三个层次上展开工作。国家环保总局围绕推动清洁生产，将重点开展基础研究，建立公告制度，加强网络信息系统建设等。     

视频监控系统升级案例

对于绝大多数公司来说,他们以前的视频监控系统基本上都是基于VCR的系统,但现在的情况发生了变化,基于DVR的系统由于其卓越的性能正在赢得越来越多公司的注意.DVR系统的优点体现在许多方面,最主要的是大容量的存储和快速的检索方式等.在本文中,我们就介绍两个这样的真实案例.     

推进生态文明 打造美丽秦皇岛

党的十八大报告将生态文明提升到更高战略层面,与经济、政治、文化、社会一起形成"五位一体"的建设中国特色社会主义事业总体战略布局,并首次提出"建设美丽中国"的新概念,为我国经济社会发展、建设小康社会和创造人民幸福生活描绘     

西方国家环境税制对我国的借鉴

编者按 随着世界经济的快速发展,全球生态环境日益恶化,世界各国纷纷采取措施保持生态平衡.许多发达国家已建立了较为完善的环境税收体系.     

决定大气环境质量的重要因素之一——自然环境

面临21世纪的到来，人们不但关注物质生活水平的变化，而且也深深关注周围生存环境的变化，希望每天都呼吸到新鲜的空气、喝到干净的水。例如我国很多大中型城市相继发布了城市空气质量周报、日报，个别发达城市正准备发布城市水质量周报、日报。随着国民经济的快速发展，大气污染呈上升趋势，这其中社会环境对大气质量的影响是肯定的，但自然环境对大气质量的影响不可不考虑。     

船用快速分离清洗剂

介绍了船用快速分离清洗剂产生的背景、提高性能要求及我国目前执行的情况。     

道路交通扬尘采样方法研究进展

道路交通扬尘是我国北方城市环境空气中PM10和PM2.5污染的重要来源之一,要改善环境空气质量,进一步降低颗粒物浓度,必须采取有效措施控制道路交通扬尘,而控制扬尘的第一步是确定采样方法。目前我国还没有标准化的道路交通扬尘采样方法,本文归纳了当前国内外应用的主要方法,重点介绍了降尘法、积尘负荷法和快速检测法三种采样方法,并对三种方法进行了比较,分析了各自具有的优势和存在的问题。最后指出,快速检测法是最有潜力的采样方法,未来还需进一步的研究,争取早日制订出适合我国国情的标准化的道路交通扬尘采样方法。     

有机化合物结构与生物降解性分类模型研究

采集包含我国近5 a申报的新化学物质在内共172种有机化学物质的28 d快速生物降解性实验测试数据,运用支持向量分类方法建立生物降解性预测分类模型,并应用该模型对测试集化合物和10种验证测试物质进行预测。预测结果表明,该模型具有很好的预测分类能力,有效反映了有机化合物结构与生物降解性间的内在关系,可广泛用于化学物质生物降解性的初步估算,确定进一步的化学品管理与实验测试要求。     

Enhanced efficiency of cadmium removal by Boehmeria nivea (L.) Gaud. in the presence of exogenous citric and oxalic acids

Boehmeria nivea（L.） Gaud. is a potential candidate for the remediation of Cd contaminated sites. The present investigation aims to explore Cd tolerance threshold and to quickly identify the role of exogenous organic acids in Cd uptake and abiotic metal stress damage.Elevated Cd levels（0–10 mg/L） resulted in an obvious rise in Cd accumulation, ranging from268.0 to 374.4 in root and 25.2 to 41.2 mg/kg dry weight in shoot, respectively. Citric acid at1.5 mmol/L significantly facilitated Cd uptake by 26.7% in root and by 1-fold in shoot,respectively. Cd translocation efficiency from root to shoot was improved by a maximum of66.4% under 3 mmol/L of oxalic acid. Citric acid exhibited more prominent mitigating effect than oxalic acid due to its stronger ligand affinity for chelating with metal and avoiding the toxicity injury of free Cd ions more efficiently. The present work provides a potential strategy for efficient Cd remediation with B. nivea.     

Rapid detection of multiple class pharmaceuticals in both municipal wastewater and sludge with ultra high performance liquid chromatography tandem mass spectrometry

This work described the development, optimization and validation of an analytical method for rapid detection of multiple-class pharmaceuticals in both municipal wastewater and sludge samples based on ultrasonic solvent extraction, solid-phase extraction, and ultra high performance liquid chromatography-tandem mass spectrometry quantification. The results indicated that the developed method could effectively extract all the target pharmaceuticals （25） in a single process and analyze them within 24 min. The recoveries of the target pharmaceuticals were in the range of 69%-131% for wastewater and 54%-130% for sludge at different spiked concentration levels. The method quantification limits in wastewater and sludge ranged from 0.02 to 0.73 ng/L and from 0.02 to 1.00μg/kg, respectively. Subsequently, this method was validated and applied for residual pharma- ceutical analysis in a wastewater treatment plant located in Beijing, China. All the target pharmaceuticals were detected in the influent samples with concentrations varying from 0.09 ng/L （tiamulin） to 15.24 μg/L （caffeine）; meanwhile, up to 23 pharmaceuticals were detected in sludge samples with concentrations varying from 60 ng/kg （sulfamethizole） to 8.55 mg/kg （ofloxacin）. The developed method demonstrated its selectivity, sensitivity, and reliability for detecting multiple-class pharmaceuticals in complex matrices such as municipal wastewater and sludge.