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281.
铁有机骨架材料的快速合成及对阴离子染料的吸附性能 总被引:5,自引:2,他引:3
染料废水色度高,难以生化处理,吸附法是有色废水处理的重要方法.采用常温快速合成铁有机骨架材料,通过IR和XRD对合成的材料进行表征;并研究铁有机骨架材料对阴离子染料的吸附性能.结果表明常温快速反应能够合成铁有机骨架材料,材料比表面积和孔体积较高,等电点p H为3.7.铁有机骨架材料在酸性条件下更容易吸附水中的阴离子染料;随染料浓度的增加,材料对染料的吸附量逐渐增大,Langmuir恒温吸附模型可以很好描述该过程,计算的吸附参数表明吸附过程容易进行.材料对染料的吸附为准二级动力学,染料结构会显著影响铁骨架材料吸附过程,络合结构的偶氮染料能够快速达到吸附平衡. 相似文献
282.
283.
本文在对西昆仑山广布的岩浆岩尤其是花岗岩研究取得的成果基础上 ,结合区域构造、沉积建造等其它地质特征 ,再造了西昆仑山地质构造发展历程 ,进而研究了区内成矿堆积环境及其矿床地质特征。结果表明 ,西昆仑山经历了复杂的地质构造演化 ,是一条由北而南分别由加里东造山带、华力西造山带和燕山早期造山带组成的复合型造山带。区内存在以下 5种主要成矿堆积环境 :洋脊 (蛇绿岩 )成矿堆积环境 (塞浦路斯型含铜黄铁矿矿床 ,豆荚状铬、镍矿床 ) ,被动陆缘成矿堆积环境 (MVT铅锌矿床 ,Sedex型铅铜矿床 ) ,火山弧成矿堆积环境 (斑岩型铜矿床 ,黑矿型铜锌铅矿床 ,矽卡岩型铜铅锌多金属矿床 ) ,弧后盆地成矿堆积环境 (海底火山喷发沉积型铁铜金矿床 ,气液充填型铜金铁矿床 )和同碰撞成矿堆积环境 (伟晶岩型稀有金属矿床 ,伟晶岩型多金属银矿床 ) 相似文献
284.
IntroductionThenotionofsustainabledevelopmentwasproposedintheWorldConservationStrategy(IUCN,1980).Itispointedoutthattheconservationandthesustainabledevelopmentaremutuallydependentandtheyshouldbeintegrated,wheretheconservationmeansthemanagementofhuman… 相似文献
285.
由早中元古代中深变质岩系组成的华南加里东海盆基底及东海、南海古陆。元古代晚期,海盆在拉张环境下继续沉降,于震旦、寒武、奥陶纪期间,沉积了厚近两万米的地槽型火山-砂泥质建造,陆源碎屑主要来自东海、南海古陆,直到中生代晚期古陆才裂陷成海,始成今日的海陆分布格局。 相似文献
286.
RIVPACS models for predicting the expected macroinvertebrate fauna and assessing the ecological quality of rivers 总被引:4,自引:0,他引:4
The European Union Water Framework Directive recognises the need for and value of biological monitoring. This paper reviews the modelling approach known as River Invertebrate Prediction and Classification System (RIVPACS
for assessing the ecological quality of river sites using macroinvertebrate sampling. The RIVPACS philosophy is to develop statistical relationships between the fauna and the environmental characteristics of a large set of high quality reference sites which can be used to predict the macroinvertebrate fauna to be expected at any site in the absence of pollution or other environmental stress. The observed fauna at new test sites can then be compared with their site-specific expected fauna to derive indices of ecological quality. All methodological decisions in any such model development have implications for the reliability, precision and robustness of any resulting indices for assessing the ecological quality and ecological grade (‘status’) of individual river stretches. The choice of reference sites and environmental predictor variables, the site classification and discrimination methods, the estimation of the expected fauna, and indices for comparing the agreement, or lack of it, between the observed and expected fauna, are all discussed. The indices are assessed on the reference sites and on a separate test set of 340 sites, which are subject to a wide range of types and degrees of impairment. 相似文献
287.
Catherine Meur-Férec 《Journal of Coastal Conservation》1997,3(2):121-132
In Europe, Britain was relatively early in being aware of the necessity of conserving natural coastal sites, though not as
early as The Netherlands. In the 1960s and 1970s, increasing economic and tourist pressures in Europe prompted measures geared
to the protection of other coasts in Europe. The promptness of the British reaction was a result of a sensitive public opinion
and of powerful private trusts (National Trust with Enterprise Neptune) rather than of a commitment by the Government. In
France a specific organization, in part inspired by the British principle, was set up. However, the French system is based
much more on a public authority, theConservatoire de l’Espace Littoral et des Rivages Lacustres and on legislation (Coastal Law of 1986). Although very different in the beginning, French and British conservation politics
today show many similarities, along with the similarities in the concerns of both countries. 相似文献
288.
Runyao Huang Jin Xu Li Xie Hongtao Wang Xiaohang Ni 《Frontiers of Environmental Science & Engineering》2022,16(9):117
289.
J. Hofmann H. Behrendt A. Gilbert R. Janssen A. Kannen J. Kappenberg H. Lenhart W. Lise C. Nunneri W. Windhorst 《Regional Environmental Change》2005,5(2-3):54-81
This paper presents a holistic strategy on the interaction of activities in the Elbe river basin and their effects on eutrophication in the coastal waters of the German Bight. This catchment–coastal zone interaction is the main target of the EUROCAT (EUROpean CATchments, catchment changes and their impact on the coast) research project, with the Elbe being one of eight case studies. The definition of socio-economic scenarios is linked with the application of models to evaluate measures in the catchment by estimation of nutrient emissions with MONERIS (MOdelling Nutrient Emissions in RIver Systems), and their effects on coastal waters with the ecosystem model ERSEM (European Regional Seas Ecosystem Model). The cost effectiveness of reduction measures will then be evaluated by application of the CENER model (Cost-Effective Nutrient Emission Reduction) and a multi-criteria analysis. Finally, the interpretation of ecological integrity is used as a measure to describe ecological impacts in an aggregated form. 相似文献
290.