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排序方式: 共有273条查询结果,搜索用时 15 毫秒
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随着海外河油田聚合物驱采油技术大面积应用,含聚合物(聚丙烯酰胺)污水大量产出。针对含聚污水黏度大、含油多、乳化稳定,采用传统的污水处理方法及设施难以达到油田注水水质标准的问题,在对海外河油田含聚污水水质分析和微生物处理可行性分析的基础上,进行了微生物处理实验,实验表明:经生化处理的污水满足SY/T 5329-2012《碎屑岩油藏注水水质指标及分析方法》。 相似文献
43.
Estimating the volatilization of ammonia from synthetic nitrogenous fertilizers used in China 总被引:11,自引:0,他引:11
Although it has long been recognized that significant amounts of nitrogen, typically in the form of ammonia (NH(3)) applied as fertilizer, are lost to the atmosphere, accurate estimates are lacking for many locations. In this study, a detailed, bottom-up method for estimating NH(3) emissions from synthetic fertilizers in China was used. The total amount emitted in 2005 in China was estimated to be 3.55 Tg NH(3)-N, with an uncertainty of ± 50%. This estimate was considerably lower than previously published values. Emissions from urea and ammonium bicarbonate accounted for 64.3% and 26.5%, respectively, of the 2005 total. The NH(3) emission inventory incorporated 2448 county-level data points, categorized on a monthly basis, and was developed with more accurate activity levels and emission factors than had been used in previous assessments. There was considerable variability in the emissions within a province. The NH(3) emissions generally peaked in the spring and summer, accounting for 30.1% and 48.8%, respectively, of total emissions in 2005. The peaks correlated with crop planting and fertilization schedules. The NH(3) regional distribution pattern showed strong correspondence with planting techniques and local arable land areas. The regions with the highest atmospheric losses are located in eastern China, especially the North China Plain and the Taihu region. 相似文献
44.
Leite Luan de Souza Ogura Allan Pretti dos Santos Danilo Vitorino Espíndola Evaldo Luiz Gaeta Daniel Luiz Antonio 《Environmental science and pollution research international》2022,29(24):35800-35810
Environmental Science and Pollution Research - Algal organic matter (AOM) in water reservoirs is a worldwide concern for drinking water treatment; once it is one of the main precursors for... 相似文献
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Environmental contaminants with estrogenic activity have recently attracted attention due to their potential detrimental effects on the reproduction of human and wildlife. The aim of this study was to evaluate the use of endogenous glutathione and glutathione-related enzymes as biomarkers of exposure to landfill leachate effluent and bisphenol A (BPA) in the freshwater snail, Bellamya purificata. Following exposure to 1%, 5% and 10% landfill leachate effluent and 1, 10, 50 and 100mugl(-1) BPA for 0, 2, 7 and 15d, activities of glutathione S-transferase (GST), selenium-dependent glutathione peroxidase (SeGPx) and glutathione reductase (GR) and levels of total glutathione were measured in the gills and digestive glands of the snails. GST and total glutathione were the most sensitive parameters in both exposure scenarios. GST activities increased by about 80%, while total glutathione decreased to 70% and 80% in the gills and digestive glands, respectively. In contrast, SeGPx and GR activities remained at the same levels in all the treatment groups compared with those of controls. The results indicated that among glutathione and glutathione-related enzymes, GST activity and total glutathione level, which showed dose-dependent dynamics, could be used as biomarkers of aquatic ecosystems contaminated with landfill leachate. 相似文献
47.
QuantitativemodelforspeciesdistributionofhydroxypolyaluminumchlorideFengLi,LuanZhaokun,TangHongxiaoResearchCenterforEcoEnvir... 相似文献
48.
中国环境影响评价(EIA)中的公众参与 总被引:15,自引:0,他引:15
探讨了中国在环境保护领域中公众参与的政治法律背景、社会机制和优缺点等理论问题,分析了中国EIA以及公众参与的形式、内容发生模转变的驱动对发展和加强中国的公众参与提出了一些对策建议。 相似文献
49.
A scheme for watershed protection and landscape enhaneement(WPLE) by utilization of fiver water was proposed to renovate water resources and protect ecological environment in Qiongshan City, Hainan Province, China. Utilization of fiver water may diminish the drought and flood risks. The scheme is benefieial to solve the problems of water resources shortage, groundwater declines and saltwater intrusion in the watershed. The object of the WPLE scheme is to aehieve a sustainable integrated development of environment, ecology, economy and society.A kind of physieally beautiful and funetionally vivid landscape may exert its synthetieal funetion on the diversity of landscape and the enjoyment of inhabitants. Feasibility of the scheme will be demonstrated by more exoeriments and tests, as well as observations in a long term. 相似文献
50.
Features and mechanism for coagulation - flocculationprocesses of polyaluminum chloride 总被引:5,自引:0,他引:5
Featuresandmechanismforcoagulation-flocculationprocessesofpolyaluminumchlorideTangHongxiao;LuanZhaokun(StateKeyLaboratoryofEn... 相似文献