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Luyao Wen Chun Yang Xiaoliang Liao Yanhao Zhang Xuyang Chai Wenjun Gao Shulin Guo Yinglei Bi Suk-Ying Tsang Zhi-Feng Chen Zenghua Qi Zongwei Cai 《环境科学学报(英文版)》2022,34(5):443-452
The COVID-19 pandemic has raised awareness about various environmental issues,including PM2.5 pollution.Here,PM2.5 pollution during the COVID-19 lockdown was traced and analyzed to clarify the sources and factors influencing PM2.5 in Guangzhou,with an emphasis on heavy pollution.The lockdown led to large reductions in industrial and traffic emissions,which significantly reduced PM2.5 concentrations in Guangzhou.Interestingly,the trend of PM2.5 相似文献
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Chen Xiao-Fan Lin Zhi-Cheng Qi Zenghua Cai Zongwei Chen Zhi-Feng 《Environmental Chemistry Letters》2023,21(2):1177-1201
Environmental Chemistry Letters - The eyes of aquatic organisms may be damaged by exposure to pollutants. Zebrafish is a common laboratory model to study ocular toxicity, combining both fish and... 相似文献
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Yuanyuan Song Lifang Zhao Zenghua Qi Yanhao Zhang Guodong Cao Ruijin Li Lin Zhu Zhu Yang Chuan Dong Zongwei Cai 《环境科学学报(英文版)》2021,33(7):64-70
Simulation of fine particulate matter (PM2.5) exposure is essential for evaluating adverse health effects. In this work, an ambient exposure system that mimicked real atmospheric conditions was installed in Taiyuan, China to study impacts of chronic PM2.5 exposure on adult and aged mice as well as Sirtuin3 knockout (Sirt3 KO) mice and wild-type (WT) mice. The real-ambient exposure system eliminated the possible artificial effects caused from exposure experiments and maintained the physiochemical characteristics of PM2.5. The case studies indicated that aged mice exhibited apparent heart dysfunction involving increased heart rate and decreased blood pressure after 17-week of real-ambient PM2.5 exposure. Meanwhile, 15-week of real-ambient PM2.5 exposure decreased the heart rate and amounts of associated catecholamines to induce heart failure in Sirt3 KO mice. Additionally, the increased pro-inflammatory cytokines and decreased platelet related indices suggested that inflammation occurred. The changes of biomarkers detected by targeted metabolomics confirmed metabolic disorder in WT and Sirt3 KO mice after exposed to real-ambient PM2.5. These results indicated that the real-ambient PM2.5 exposure system could evaluate the risks of certain diseases associated with air pollution and have great potential for supporting the investigations of PM2.5 effects on other types of rodent models. 相似文献
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模糊层次综合法用于企业安全性评价 总被引：15，自引：2，他引：15
将模糊综合评价与层次分析相结合 ,建立了企业安全模糊层次综合法的评价模型。实践证明 ,这种方法在进行企业的安全性综合评价中是有效的 相似文献
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Shen Ji Zhao Qianxue Zhang Xiaoshan Zhang Baozhu Zhao Dianwu Fan Zenghu Cheng Panjiang 《环境科学学报(英文版)》1991,3(1):41-58
-The concentrations of gas phase SO2, O3 and chemical composition of sequential rainwater samples were measured on 6/11/88 to 6/28/88 at some sites of Guiyang area. S (IV) was present in great excess of H2O2 in rainwater samples collected at residential sites of the city corresponding to high level of gas phase SO2. Considerable H2O2 in rainwater samples was observed in background air at suburbs. The evidence that clean rainwater samples were collected at 20km away from the city in 6/18/88 precipitation event revealed that the major process of acidification of the rain in the high polluted areas was below-cloud scavenging of trace gases. From a simulation calculation it was found that the rate of oxidation of S(IV) by O3 and by Mn2+, Fe3+ catalytic in high pH rainwater is significant, but for low pH the major SO42- is produced by the reaction of S (IV) with H2O2. 相似文献
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粘性水灭火剂性能试验及灭火机理研究 总被引：2，自引：1，他引：1
水是常用灭火剂,但流失严重,灭火效率不高.在水中加入添加剂,提高水在固体表面的粘附性,减少流失,可显著提高灭火速度.笔者提出了应具有屈服假塑性流体特性的粘性水灭火剂,能在物体表面形成稳定的覆盖层,并具有较低的输送阻力.在水中加入0.4%的KD-1型添加剂,制成的粘性水灭火剂就具有上述的流体力学特性,该粘性水可在固体表面形成1～5mm的稳定覆盖层.在木材火灾灭火试验中,粘性水的灭火时间是水灭火的1/4.笔者还研讨了粘性水灭火剂的灭火机理,并指出该灭火剂适用的范围和开发前景. 相似文献
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根据新庄煤矿11101进风巷出现不明雾气,笔者认为,研究和分析该雾气的成因及是否有毒,对煤矿安全生产和矿工的生命安全与健康至关重要.通过现场气象测定和实验室模拟试验,确定了雾气成因,经雾气发生地点采样分析,空气中未发现有毒气体.经实测分析和研究表明,进风巷雾气成因是:当突然打开11101工作面回风巷道中的调节风门时,巷道气压突然降低,空气膨胀,温度有所下降,使得空气中的水分凝结,从而形成雾气.通过实验室模拟实验再现了这一过程,表明对雾气现象的分析和研究的结果是正确的. 相似文献
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Biao Kong Zenghua Li Yongliang Yang Zhen Liu Daocheng Yan 《Environmental science and pollution research international》2017,24(30):23453-23470
In recent years, the ecology, security, and sustainable development of modern mines have become the theme of coal mine development worldwide. However, spontaneous combustion of coal under conditions of oxygen supply and automatic exothermic heating during coal mining lead to coalfield fires. Coal spontaneous combustion (CSC) causes huge economic losses and casualties, with the toxic and harmful gases produced during coal combustion not only polluting the working environment, but also causing great damage to the ecological environment. China is the world’s largest coal producer and consumer; however, coal production in Chinese mines is seriously threatened by the CSC risk. Because deep underground mining methods are commonly adopted in Chinese coal mines, coupling disasters are frequent in these mines with the coalfield fires becoming increasingly serious. Therefore, in this study, we analyzed the development mechanism of CSC. The CSC risk assessment was performed from the aspects of prediction, detection, and determination of the “dangerous area” in a coal mine (i.e., the area most susceptible to fire hazards). A new geophysical method for CSC determination is proposed and analyzed. Furthermore, the main methods for CSC fire prevention and control and their advantages and disadvantages are analyzed. To eventually construct CSC prevention and control integration system, future developmental direction of CSC was given from five aspects. Our results can present a reference for the development of CSC fire prevention and control technology and promote the protection of ecological environment in China. 相似文献