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垃圾填埋场对周边地质环境影响与防治对策 总被引:5,自引:0,他引:5
垃圾填埋场对周边地质环境的污染越来越受到研究人员的重视,其影响因素复杂,不仅与MSW的性质有关,还与垃圾填埋场的类型及其所处地质环境有密切关系。为分析垃圾填埋场中的渗滤液、重金属以及其他有害物质对周边地质环境(地下水环境、土壤环境)的影响规律,对大量相关文献和实验资料进行研究分析。研究结果表明:渗滤液是垃圾填埋场影响周围地质环境最为重要的因素,对渗滤液污染地表水及地下水情况和防治方法进行了探讨;同样渗滤液也是重金属污染土壤的载体,重金属在土壤剖面中的滞留量一般随深度的增加而逐渐减少;重金属对土壤的污染具有积累性和滞后性特点,随着填埋时间的延长污染加重。最后,根据其污染途径和污染规律,提出了相应具体防治对策。 相似文献
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近年来,全国各地新建了大量的垃圾填埋场,其中多有不符合垃圾处理处置场地建设规范的,垃圾填埋场渗滤液对地下水的污染风险也逐年凸显,这就要求对后续垃圾填埋场建设时,在环评阶段做好垃圾填埋场渗滤液对地下水的污染风险预测,为垃圾填埋场地下水污染预防设施的设计与建设提供指导。本文探索了垃圾渗滤液在包气带和含水层中的联合运移模拟,首先利用Hydrus建立包气带模型,模拟垃圾渗滤液中氨氮在包气带中的迁移转化,在此基础上用Visual Modflow软件建立地下含水层模型,对比渗滤液经过包气带过滤和没经过包气带过滤两种情景下的污染范围和程度。模拟结果显示,包气带和含水层联合运移模拟渗滤液泄漏后的运移途径和路线,更接近渗滤液进入含水层的实际情况。 相似文献
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为了深入了解垃圾渗滤液对浅层地下水污染的机理,揭示不同龄期垃圾渗滤液在浅层地下水中多组分运移规律,文章以阜新市垃圾填埋场为研究对象,通过室内土柱对比实验,研究了不同龄期垃圾渗滤液在浅层地下水中多组分运移的机理和规律。结果表明不同龄期垃圾渗滤液在入渗过程中都会引起地下水不同程度的污染,且新鲜垃圾渗滤液较老龄垃圾渗滤液更易污染地下水,其污染机理主要为吸附、解析、溶解、沉淀和离子交换等水岩作用。研究结果为今后垃圾填埋场的治理和地下水的修复提供理论依据。 相似文献
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垃圾填埋是目前处理城市生活垃圾普遍使用的方式,由此产生的垃圾渗滤液成为主要的地下水污染源.本文以上海市某生活垃圾填埋场作为研究对象,研究垃圾填埋对地下水的影响.通过监测该场地垃圾填埋前后2年内场区及周边地下水水质的变化情况,以垃圾填埋前调查区的地下水样品分析结果为本底值,采用本底法对地下水水质进行评价来判定地下水是否受到垃圾渗滤液的影响.评价结果显示,对于本研究的水质动态监测阶段,调查区内的浅层地下水水质暂未受到垃圾渗滤液的影响,个别监测井水质发生较大变化是由于填埋场施工建设过程中,破坏了监测井井盖及挖穿了井边含水层顶层.随着整个垃圾填埋场运行时间的延长,防渗漏措施的有效性以及垃圾渗滤液对周边地下水的影响还需要进一步研究. 相似文献
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生活垃圾填埋场渗滤液对潜层地下水污染的实验模拟分析——以北京北天堂垃圾填埋场为例 总被引:7,自引:0,他引:7
通过对北京市西郊南部北天堂垃圾填埋场渗滤污染组分在含水介质中运移的室内模拟实验分析,揭示了有机污染物等污染组分在含水介质中的运移转化规律,即有机污染物等污染组分在微生物的作用下得到降解;通过阻滞因子和水化学迁移率的计算,得出该含水介质对污染组分的阻滞能力较好。可用水化学迁移率粗略预测不同污染质锋面达到指定地点的时间,为垃圾填埋场地底部防渗层的设计和渗滤液对地下水污染程度的预报提供依据。 相似文献
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垃圾填埋技术是我国应用较广的垃圾处理技术,以某简易垃圾填埋场为例,查明研究区水文地质条件,通过计算得到垃圾渗漏液产生量及相关污染物浓度,选取合理预测参数,运用visual-modflow软件建立研究区地下水流场及地下水溶质运移模型,对研究区地下水相关污染因子进行预测,根据相关预测模型和参数,结果发现:该简易垃圾填埋场中氨氮污染距离可达536.4 m;高锰酸钾指数污染距离可达480.36 m,说明该简易垃圾填埋场渗滤液的泄漏已对下游一定区域的地下水环境造成了污染。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引:4,自引:0,他引:4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozach Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level 相似文献
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正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7), 相似文献
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正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci- 相似文献
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正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli- 相似文献
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正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.) 相似文献
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正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861 相似文献