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641.
Wenjun Li Hong Li Jinjuan Li Xueli Cheng Zhengzheng Zhang Fahe Chai Hao Zhang Ting Yang Pengli Duan Defeng Lu Yizhen Chen 《环境科学学报(英文版)》2018,30(7):61-76
Size–fractioned atmospheric aerosol particles were collected during a typical heavy air pollution event in Beijing. The organic and inorganic components on the surfaces of the samples were analyzed using time–of–flight secondary ion mass spectrometry(TOF–SIMS).The variation characteristics of the surface chemical composition and influencing factors were studied, and the possible sources of these chemical compositions were identified through principal component analysis. The results showed that inorganic components such as crustal elements and sulfate, and organic components such as aliphatic hydrocarbons and oxygen–containing organic groups were present. Some surface components, such as polycyclic aromatic hydrocarbons, heavy metals and fluorides may exert adverse effects on human health. The species and relative percentages of the chemical components varied with particle size, diurnal and pollution progress. During a heavy pollution event, the species and relative percentages of secondary components such as oxygen–containing organic groups and sulfurous compounds increased, indicating that particles aged during this event. The surface chemical composition of the aerosol particles was affected mainly by emissions from coal combustion and motor vehicles. In addition, air pollution, meteorological factors, and air mass transport also exerted a significant effect on the surface chemical composition of aerosol particles. 相似文献
642.
In view of the development of miniaturized sensor arrays, a solid-contact ammonium ion selective electrode has been investigated. A conductive polypyrrole film was electrochemicallydeposited on a glassy carbon surface and used as an internal solid contact layer between the sensing membrane and solid electrode surface. A systematic evaluation of the importantparameters affecting the electromotive force (emf) response ispresented. The performances of this solid-contact sensor were verified using a batch-mode measurement setup and a wall-jet flow cell system. The designed sensor exhibited excellent selectivity for the primary ion and a linear response over the pNH4
+ range 1–5 with a slope of 56.3 mV decade-1. The sensor has a fast response and is relativelyrobustness, and was also used to determine ammonium concentrations in natural waters, with promising results. 相似文献
643.
室内甲醛污染及对人体健康的影响 总被引:4,自引:0,他引:4
通过对三种不同类型居室内甲醛监测表明,甲醛浓度与室内装饰、吸烟和燃料的不完全燃烧有关.兰州地区夏季室内甲醛超标率高,为41.0%~51.3%.室内主要污染物除TSP以外,甲醛居第2位,且一天中浓度最高值在中午.新建居室比普通居室甲醛浓度高,在所有情况下,室内浓度高于室外. 相似文献
644.
This rapid infiltration (RI) system is proposed as the first one in China. The RI system treated 500 m3/d of municipal and industrial wastewater. About 0.36 ha of field was used. It has been evaluated that the RI system has an excellent ability to treat the wastewater. The infiltration rate was 50.3 m/a. 相似文献
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648.
绿色会计在可持续发展中的应用 总被引:9,自引:0,他引:9
文章分析了可持续发展与绿色会计的关系,绿色会计是实现可持续发展的重要的科学工具,同时,对绿色会计的产生原因和最新的发展,绿色会计的计量技术,算方法和报告方式等问题作了研究,最后,分析了当前我国开展绿色会计存在的问题,并提出了相应的对策。 相似文献
649.
The renovated water in the rapid infiltration system (RI) as area for fish and duck farming is feasible. The flesh of fish and duck is edible. The farming of fish for 5 months and duck for 120 - 130 days can be accepted. It is beneficial to environment and economy, especially in developing countries. The production of fish and duck can make up for the cost of wastewater treatment. 相似文献
650.
Li Yong Xu Rui-wei Zhang Shui-ming An Qiong Jin Wei Duan Zeng-qiang Xi Hui-lin 《环境科学学报(英文版)》1998,10(3)
Environmental pollution is a by-product of industrialization when economy of a region is developing. China also suffers from such a problem, especially in the southern part like Suzhou region in Jiangsu Province. In this paper, data covering situations of surface water pollution and social and economic development showed that the surface water pollution in Taicang County, a typical economic zone of Suzhou region, is significantly correlated to the economic growth of this region. 相似文献