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1.
针对现有工业过程气体在线测量预处理方式存在的系统复杂、维护量大、测量延时等问题,基于微孔陶瓷物理特性及空气动力学原理研制了原位渗透管式预处理装置。该预处理装置主要包括光学端和渗透管腔体,当待测气体流经渗透管时,由于绕流作用在来流方向壁面前后形成压差,在压差作用下,气体经过渗透管过滤后进入管内进行激光测量。首先采用CFD数值模拟方法对气体管道和微孔陶瓷渗透管耦合流域进行了流场模拟,发现在单一变量条件下,气体更新速率随着流速和内径的增大而提升,随着外径的增大而降低;然后搭建实验装置进行了实验验证,与流场模拟结果一致;最后进行了原位渗透管式预处理装置研制及现场应用,并采用便携式分析仪进行了对比,发现二者误差<2%。与现有预处理装置相比,渗透管腔体安装于管道内,测量环境与管道工况一致,且取样路径短,可以实现工业过程气体高保真快速在线监测。 相似文献
2.
Chunyan Wang Jiangshan Wang Yi Liu Lei Zhang Yong Sun Jiuhui Qu 《Frontiers of Environmental Science & Engineering》2021,15(5):110
3.
Yuanhang Zhang Yuesi Wang Xin Jin Zirui Liu Gehui Wang Guiqian Tang Keding Lu Bo Hu Shanshan Wang Guohui Li Xinqin An Chao Wang Qihou Hu Lingyan He Fenfen Zhang 《环境科学学报(英文版)》2023,123(1):350-366
Atmospheric oxidizing capacity (AOC) is an essential driving force of troposphere chemistry and self-cleaning, but the definition of AOC and its quantitative representation remain uncertain. Driven by national demand for air pollution control in recent years, Chinese scholars have carried out studies on theories of atmospheric chemistry and have made considerable progress in AOC research. This paper will give a brief review of these developments. First, AOC indexes were established that represent apparent atmospheric oxidizing ability (AOIe) and potential atmospheric oxidizing ability (AOIp) based on aspects of macrothermodynamics and microdynamics, respectively. A closed study refined the quantitative contributions of heterogeneous chemistry to AOC in Beijing, and these AOC methods were further applied in Beijing-Tianjin-Hebei and key areas across the country. In addition, the detection of ground or vertical profiles for atmospheric OH·, HO2·, NO3· radicals and reservoir molecules can now be obtained with domestic instruments in diverse environments. Moreover, laboratory smoke chamber simulations revealed heterogeneous processes involving reactions of O3 and NO2, which are typical oxidants in the surface/interface atmosphere, and the evolutionary and budgetary implications of atmospheric oxidants reacting under multispecies, multiphase and multi-interface conditions were obtained. Finally, based on the GRAPES-CUACE adjoint model improved by Chinese scholars, simulations of key substances affecting atmospheric oxidation and secondary organic and inorganic aerosol formation have been optimized. Normalized numerical simulations of AOIe and AOIp were performed, and regional coordination of AOC was adjusted. An optimized plan for controlling O3 and PM2.5 was analyzed by scenario simulation. 相似文献
4.
Junhua Li Shangchao Xiong Jianjun Chen Hao Liu Wenzhe Si Yue Peng Xuecheng Wu Huan Liu 《环境科学学报(英文版)》2023,123(1):400-416
In most of the world's building material industries, the control of flue gas pollutants mainly focuses on a single pollutant. However, given the large capacity and high contribution of China's building materials industry to global air pollution, the need to develop multi-pollutant emission reduction technology is urgent. Recently, China has focused on reducing the emissions of flue gas pollutants in the building materials industry, established many key research and development projects, and gradually implemented more stringent pollutant emission limits. This project focuses on the most recent advances in flue gas emission control technology in China's building materials industry, including denitration, dust removal, desulfurization, synergistic multi-pollutant emission reduction, and the construction of pilot research and demonstration projects for pollutant removal in several building material industries. On this basis, revised pollutant limits in flue gas emitted in China's building material industry are proposed. 相似文献
5.
Islam S. M. Didar-Ul Mondal Prantor Kumar Ojong Nathanael Bodrud-Doza Md. Siddique Md. Abu Bakar Hossain Moazzem Mamun Mohammed A. 《Environment, Development and Sustainability》2021,23(8):11953-11974
Environment, Development and Sustainability - The COVID-19 pandemic has caused a global emergence, and the absence of a proven vaccine or medicine has led to the implementation of measures to... 相似文献
6.
Yuqing Xu Zedong Lu Wenjun Sun Xiaohui Zhang 《Frontiers of Environmental Science & Engineering》2021,15(6):131
7.
Han Qu Hongting Diao Jiajun Han Bin Wang Gang Yu 《Frontiers of Environmental Science & Engineering》2023,17(1):12
Over the past decades, the plastic production has been dramatically increased. Indeed, a category of small plastic particles mainly with the shapes of fragments, fibers, or spheres, called microplastics (particles smaller than 5 mm) and nanoplastics (particles smaller than 1 μm) have attracted particular attention. Because of its wide distribution in the environment and potential adverse effects to animal and human, microplastic pollution has been reported as a serious environment problem receiving increased attention in recent years. As one of the commonly detected emerging contaminants in the environment, recent evidence indicates that the concentration of microplastics show an increasing trend, for the reason that up to 12.7 million metric tons of plastic litter is released into aquatic environment from land-based sources each year. Furthermore, microplastic exposure levels of model organisms in laboratory studies are usually several orders of magnitude higher than those found in environment, and the microplastics exposure conditions are also different with those observed in the environment. Additionally, the detection of microplastics in feces indicates that they can be excreted out of the bodies of animal and human. Hence, great uncertainties might exist in microplastics exposure and health risk assessment based on current studies, which might be exaggerated. Policies reduce microplastic emission sources and hence minimize their environmental risks are determined. To promote the above policies, we must first overcome the technical obstacles of detecting microplastics in various samples. 相似文献
8.
温室气体和空气污染物的协同治理是一种双赢的策略。自协同效应的概念提出以来,大量研究对温室气体和大气污染之间的协同减排技术、措施、潜力等方面进行了评估。本研究回顾了协同治理理论的发展历程、典型案例以及重要的政策实践,在此基础上讨论了当前研究与实践的特点,并对未来研究提出了建议。典型案例涉及能源、交通、工业和居民部门,政策实践讨论了温室气体和空气污染协同治理政策的主要类型及其实施情况。从损失评估、协同机理、高精度排放清单及模拟等角度对未来促进协同治理的研究提出了方向建议。 相似文献
9.
废荧光灯管的来源广泛,包括工业来源和社会来源,社会来源又包括居民来源,企业事业单位、公共场所等机构来源,具有多来源的特性。废荧光灯管中含有汞,若不经过妥善处理,会造成环境污染,对人的身体健康造成危害。随着国内生活垃圾分类的开展,废荧光灯管作为生活垃圾中有害垃圾的典型类别被强制分类,但仍存在很多问题。本文梳理了我国废荧光灯管的产生情况、LED灯替代情况,并对美国、欧盟、日本和我国国内典型城市的废荧光管理情况进行了总结。针对我国废荧光灯管的回收现状,从责任主体、责任划分、收集渠道、资金机制等角度提出了相关的管理建议,为推动我国废荧光灯管的管理提供借鉴。 相似文献
10.
Xueqi Fan Jie Gao Wenchao Li Jun Huang Gang Yu 《Frontiers of Environmental Science & Engineering》2020,14(1):8