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郑安 《安全.健康和环境》2006,6(7):10-12
电力系统振荡故障引起的全系统周波、电压的剧烈变化,系统瓦解或大面积停电事故时有发生,无论对系统、电气设备还是用户都会造成极大危害.结合齐鲁公司电网2004年11月18日事故进行分析探讨,提出防范措施,以减少此类事故的发生. 相似文献
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Taste and odor (T/O) in drinking water often cause consumer complaints and are thus regulated in many countries. However, people in different regions may exhibit different sensitivities toward WO. This study proposed a method to determine the regional drinking water odorant regulation goals (ORGs) based on the odor sensitivity distribution of the local population. The distribution of odor sensitivity to 2-methylisobomeol (2-MIB) by the local population in Beijing, China was revealed by using a normal distribution function/model to describe the odor complaint response to a 2-MIB episode in 2005, and a 2-MIB concentration of 12.9 ng/L and FPA (flavor profile analysis) intensity of 2.5 was found to be the critical point to cause odor complaints. Thus the Beijing ORG for 2-MIB was determined to be 12.9 ng/L. Based on the assumption that the local FPA panel can represent the local population in terms of sensitivity to odor, and that the critical FPA intensity causing odor complaints was 2.5, this study tried to determine the ORGs for seven other cities of China by performing FPA tests using an FPA panel from the corresponding city. ORG values between 12.9 and 31.6 ng/L were determined, showing that a unified ORG may not be suitable for drinking water odor regulations. This study presents a novel approach for setting drinking water odor regulations. 相似文献
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评析中国现行环境保护投资体制 总被引:9,自引:0,他引:9
本文通过对我国近15年环保投资相关数据的分析,揭示了现行环保投资体制失灵的一个重要因素是结构上失衡,在环保投资中没有体现环保设施运营费用,直接影响了环保投资的效益,其次,一些指标的设计严重偏离了现实,影响了环保投资的有机构成,也导致环境政策的失效,在此基础上,结合实际,提出初步的改革设想。 相似文献
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综述了酶传感器、酶联免疫传感器、液相色谱、荧光光谱和流动注射化学发光等方法在环境水西维因残留检测中的应用,对各种分析方法的工作原理作了简要介绍,并对其应用前景作了展望. 相似文献
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The evolution of pollution profile and health risk assessment for three groups SVOCs pollutants along with Beijiang River,China 总被引:1,自引:0,他引:1
Jiao Tang Taicheng An Jukun Xiong Guiying Li 《Environmental geochemistry and health》2017,39(6):1487-1499
Three important groups of semi-volatile organic compounds (SVOCs), polycyclic aromatic hydrocarbons (PAHs), organic chlorinated pesticides (OCPs) and phthalate esters (PAEs), were produced by various human activities and entered the water body. In this study, the pollution profiles of three species including 16 PAHs, 20 OCPs and 15 PAEs in water along the Beijiang River, China were investigated. The concentrations of Σ16PAHs in the dissolved and particulate phases were obtained as 69–1.5 × 102 ng L?1 and 2.3 × 103–8.6 × 104 ng g?1, respectively. The levels of Σ20OCPs were 23–66 ng L?1 (dissolved phase) and 19–1.7 × 103 ng g?1 (particulate phase). Nevertheless, higher levels of PAEs were found both in the dissolved and particulate phases due to abuse use of plastic products. Furthermore, non-cancer and cancer risks caused by these SVOCs through the ingestion absorption and dermal absorption were also assessed. There was no non-cancer risk existed through two kinds of exposure of them at current levels, whereas certain cancer risk existed through dermal absorption of PAHs in the particulate phase in some sampling sites. The results will show scientific insights into the evaluation of the status of combined pollution in river basins, and the determination of strategies for incident control and pollutant remediation. 相似文献
110.
随着中国生态环境影响评价的开展,中国正在积极推进生态经济评价预测层次上的环评,对其评价方法提出了更高的要求。当前国内外所用生态价值评价方法缺乏环境与经济相联系起来和在决策中体现生态环评结果的方法,缺乏量化评价指标体系及评价方法,没有从系统的角度考虑一个动态的、复杂系统的环境影响因素。在系统分析生态环境影响评价中经济评价方法的基础上,对吉林省三岔子林业局天然林生态系统中保持水土、涵养水源、调节气候、净化大气等生态价值进行生态环境影响经济分析、预测、评价,首先建立该区天然林生态系统服务价值评估指标体系,并结合野外调查测量及实地数据分析,初步对天然林生态系统价值进行测算;其次利用灰色系统预测分析,对2009年-2028年三岔子林业局天然林生态系统价值进行预测,最后计算出天然林生态系统带来的经济效益。 相似文献