电厂二氧化碳捕捉技术对比研究

由于全球温室效应的不断加剧,发展二氧化碳捕捉技术变得十分必要.通过分析燃烧前捕捉、燃烧后捕捉和富氧燃烧捕捉三种二氧化碳捕捉方式流程及其特点,指出三种不同的二氧化碳捕捉技术的发展现状以及应用途径.通过具体对比现有二氧化碳捕捉技术的工作原理以及优缺点,针对现有的几种具体的二氧化碳捕捉技术进行详细的分析,积极应用各种物理、化...     

微生物絮凝剂的絮凝性及抗氧化性研究

考察了一株产絮凝剂细菌BK-4所产絮凝剂的絮凝能力、组成及抗氧化性.结果表明,接种量2％、培养24 h后BK-4菌发酵液的最大絮凝率可达96.9％.发酵液的主要组成为多糖,提取方法对粗提物的絮凝率有明显影响,水溶醇沉法粗提物的最大絮凝率可达95.6％,粗提物多糖含量为1.65g/L时对DPPH自由基的捕获率可达最大值3...     

滇池蓝藻快速热解液化制取生物油的初步研究

文章采用实验室规模的固定床反应器作为实验平台,对蓝藻快速热解液化制取生物油的可行性进行了探讨,并对影响液化性能的诸多因素,如热解温度(300～700℃)、载气流量(0～400 mL/min)、原料粒径(d＜0.08 nn,0.15＜d＜0.25 mm,0.25＜d＜0.38 mm,0.38＜d＜3.35 mm,d＞3....     

基于生态系统的水环境压力分区指标体系构建

为了科学合理的完成水环境压力分区,构建水环境压力分区指标体系是其关键和基础.鉴于水环境压力涉及因素的系统性.相互联系性,从生态系统的角度考虑选取水环境压力分区指标十分必要;由于水环境压力涉及方面的相互联系性,其表征指标之间往往存在信息量的重叠,为了避免信息的重复表达,减少不必要的工作量,同时避免冗余指标带来的干扰,需对...     

进一步探讨内蒙古自治区环境突发性污染事件应急监测工作

随着内蒙古经济社会的快速发展,环境突发性事件应急监测存在一些新问题,根据内蒙古实际情况,探讨环境突发性污染事件应急监测工作思路,进一步保护环境和人类生命安全。     

造纸污泥综合利用热电项目验收监测难点及对策

近年来,随着环境监测技术规范化建设的不断发展,国家环保部相继出台了包括火力发电、水泥制造、汽车制造、造纸工业在内的12个不同行业类型的建设项目竣工验收技术规范。然而,造纸污泥综合利用热电项目验收监测尚未列入规范编制日程,其中工程调查、标准制定、点位布设和报告编制等环节仍存在一定误区和难点。文章例从上述薄弱环节入手,对常见难点问题提出了相应的解决办法,可供广大环境监测工作者参考和借鉴。     

进一步探讨内蒙古自治区环境突发性污染事件应急监测工作

随着内蒙古经济社会的快速发展,环境突发性事件应急监测存在一些新问题,根据内蒙古实际情况,探讨环境突发性污染事件应急监测工作思路,进一步保护环境和人类生命安全。     

我市污水处理自动化控制系统展望——基于PLC控制与触摸屏的应用

介绍了由PLC和触摸屏组成的控制系统的特点和功能,以及PLC和上位机构成的控制系统可实现污水处理整个过程的实时监测和控制。     

Reaction mechanism and metal ion transformation in photocatalytic ozonation of phenol and oxalic acid with Ag+/TiO2

Photocatalytic ozonation of phenol and oxalic acid （OA） was conducted with a Ag^＋/TiO2 catalyst and different pathways were found for the degradation of different compounds. Ag^＋ greatly promoted the photocatalytic degradation of contaminants due to its role as an electron scavenger. It also accelerated the removal rate of OA in ozonation and the simultaneous process for its complex reaction with oxalate. Phenol could be degraded both in direct ozonation and photolysis, but the TOC removal rates were much higher in the simultaneous processes due to the oxidation of hydroxyl radicals resulting from synergetic effects. The sequence of photo-illumination and ozone exposure in the combined process showed quite different effects in phenol degradation and TOC removal. The synergetic effects in different combined processes were found to be highly related to the properties of the target pollutants. The color change of the solution and TEM result confirmed that Ag＋ was easily reduced and deposited on the surface of Tit2 under photo-illumination, and dissolved again into solution in the presence of ozone. This simple cycle of enrichment and distribution of Ag^＋ can greatly benefit the design of advanced oxidation processes, in which the sequences of ozone and photo-illumination can be varied according to the needs for catalyst recycling and the different properties of pollutants.     

Primary neuronal-astrocytic co-culture platform for neurotoxicity assessment of di-(2-ethylhexyl) phthalate

Plastics such as polyvinyl chlorides （PVC） are widely used in many indoor constructed environments; however, their unbound chemicals, such as di-（2-ethylhexyl） phthalates （DEHP）, can leach into the surrounding environment. This study focused on DEHP＇s effect on the central nervous system by determining the precise DEHP content in mice brain tissue after exposure to the chemical, to evaluate the specific exposure range. Primary neuronal-astrocyte co-culture systems were used as in vitro models for chemical hazard identification of DEHP. Oxidative stress was hypothesized as a probable mechanism involved, and therefore the total reactive oxygen species （ROS） concentration was determined as a biomarker of oxidative stress. In addition, NeuriteTracer, a neurite tracing plugin with ImageJ, was used to develop an assay for neurotoxicity to provide quantitative measurements of neurological parameters, such as neuronal number, neuron count and neurite length, all of which could indicate neurotoxic effects. The results showed that with 1 nmol/L DEHP exposure, there was a significant increase in ROS concentrations, indicating that the neuronal-astrocyte cultures were injured due to exposure to DEHP. In response, astrocyte proliferation （gliosis） was initiated, serving as a mechanism to maintain a homeostatic environment for neurons and protect neurons from toxic chemicals. There is a need to assess the cumulative effects of DEHP in animals to evaluate the possible uotake and effects on the human neuronal system from exoosure to DEHP in the indoor environment.