反相流动注射催化光度法测定废水中的亚硝酸根   总被引：3，自引：0，他引：3  

訾言勤  孟国防 《岩矿测试》2001,20(2):108-110

采用反相流动注射技术与催化光度法相结合，用微机化流动注射分析仪准确控制反应时间，优化了实验条件，克服了催化光度法反应时间难以控制引起的方法精密度、准确度不高的弱点，拟定了测定痕量亚硝酸根的流动注射催化光度方法。分析速度第小时20次，NO2^- 质量浓度在0．00－2．00mg/L，回归方程斜率为0．155。方法直接测定电厂测水中NO2^-的结果与Griess法相符合，RSD＜5．0％（n=5）。  相似文献   

Strain and tilt changes measured during a water injection experiment at the Nojima Fault zone, Japan   总被引：2，自引：0，他引：2  

Kunio Fujimori  Hiroshi Ishii  Atsushi Mukai  Shigeru Nakao  Shigeo Matsumoto  Yasuhiro Hirata 《Island Arc》2001,10(3-4):228-234

Abstract In order to make geophysical and geological investigations of the Nojima Fault on Awaji Island, Japan, three boreholes measuring 1800 m, 800 m and 500 m deep were drilled into the fault zone. The fault is one of the seismic source faults of the 1995 Hyogo-ken Nanbu earthquake of M 7.2. A new multicomponent borehole instrument was installed at the bottom of the 800 m borehole and continuous observations of crustal strain and tilt have been made using this instrument since May 1996. A high-pressure water injection experiment within the 1800 m borehole was done in February and March 1997 to study the geophysical response, behavior, permeability, and other aspects of the fault zone. The injection site was located approximately 140 m horizontally and 800 m vertically from the instrument. Associated with the water injection, contraction of approximately 0.7 × 10⁻⁷ str (almost parallel to the fault) and tilt of approximately 1 × 10^-7 rad in the sense of upheaval toward the injection site were observed. In addition to these controlled experiments, the strainmeter and tiltmeter also recorded daily variations. We interpret strain and tilt changes to be related to groundwater discharge and increased ultra-micro seismicity induced by the injected water.  相似文献   

Routine Analyses of Trace Elements in Geological Samples using Flow Injection and Low Pressure On-Line Liquid Chromatography Coupled to ICP-MS: A Study of Geochemical Reference Materials BR, DR-N, UB-N, AN-G and GH   总被引：6，自引：0，他引：6  

Jean Carignan  Pascal Hild  Guy Mevelle  Jacques Morel  Delphine Yeghicheyan 《Geostandards and Geoanalytical Research》2001,25(2-3):187-198

  相似文献   

Triggered earthquakes and deep well activities   总被引：1，自引：0，他引：1  

Craig Nicholson  Robert L. Wesson 《Pure and Applied Geophysics》1992,139(3-4):561-578

Earthquakes can be triggered by any significant perturbation of the hydrologic regime. In areas where potentially active faults are already close to failure, the increased pore pressure resulting from fluid injection, or, alternatively, the massive extraction of fluid or gas, can induce sufficient stress and/or strain changes that, with time, can lead to sudden catastrophic failure in a major earthquake. Injection-induced earthquakes typically result from the reduction in frictional strength along preexisting, nearby faults caused by the increased formation fluid pressure. Earthquakes associated with production appear to respond to more complex mechanisms of subsidence, crustal unloading, and poroelastic changes in response to applied strains induced by the massive withdrawal of subsurface material. As each of these different types of triggered events can occur up to several years after well activities have begun (or even several years after all well activities have stopped), this suggests that the actual triggering process may be a very complex combination of effects, particularly if both fluid extraction and injection have taken place locally. To date, more than thirty cases of earthquakes triggered by well activities can be documented throughout the United States and Canada. Based on these case histories, it is evident that, owing to preexisting stress conditions in the upper crust, certain areas tend to have higher probabilities of exhibiting such induced seismicity.  相似文献   

WINDOW FACTOR ANALYSIS:THEORETICAL DERIVATION AND APPLICATION TO FLOW INJECTION ANALYSIS DATA   总被引：1，自引：0，他引：1  

EDMUND R.MALINOWSKI 《地理学报(英文版)》1992,(1)

Window factor analysis(WFA)is a self-modeling method for extracting the concentration profiles ofindividual components from evolutionary processes such as flow injection,chromatography,titrationsand reaction kinetics.The method takes advantage of the fact that each component lies in a specificregion along the evolutionary axis,called the‘window’.Theoretical equations are derived.The methodis used to extract the concentration profiles and spectra of seven bismuth species from data obtained byGemperline and Hamilton,who injected bismuth perchlorate into a flowing stream of hydrochloric acid.  相似文献   

流动注射-光度法测定地质样品中痕量碘   总被引：2，自引：2，他引：2  

李锦昕  邵一立  刘国均 《岩矿测试》1993,(1):11-13

利用I~-对4,4′-四甲基二氨基二苯甲烷(4,4′-TMB-DPM)与氯胺T反应的催化作用,建立了流动注射-分光光度测定地质样品中痕量碘的方法。采用不等流速合并带法,分析速度快、节省试剂、灵敏度高。与高温水解法释放I~-相结合,使样品处理简单、干扰离子少。对于含I~-10μg/L的水样,其RSD(n=19)为1.1％,检出限为0.3ng/ml。用于水系沉积物、土壤分析时,含碘1.6×10~(-6)的样品RSD(n=10)为6.1％,检出限为0.08×10~(-6)。测量速度50N/h。  相似文献   

Orbit injection error analysis for the Lageos III mission     

Stefano Casotto 《Celestial Mechanics and Dynamical Astronomy》1993,56(3):397-408

An analysis is presented of the orbital injection errors for the Lageos III satellite mission. Several methods are introduced for the solution of the Inverse Problem in the Theory of Errors. The novelty of the present approach consists in the use of the full geopotential covariance matrix in the error propagation equations. The GEM-T1 covariance matrix is used. It is found that by properly accounting for the correlation among the even zonal harmonic coefficients the acceptable error bounds increase by an order of magnitude with respect to the case when only the variances are used. The most stringent constraint, even when using the full covariance, is on inclination, whose nominal value must be realized within approximately 0.1° for the recovery of the Lense-Thirring precession to be successful at the 3% level (accounting only for injection errors). The associated tolerance in the semimajor axis is about 30 km while that in eccentricity is approximately 0.2. However, if the errors in semimajor axis and eccentricity can be kept to the routinely achievable levels respectively of 10 km and 0.004, then the tolerance in inclination can be relaxed to 0.2°.  相似文献   

北京市老城区雨洪控制与利用示范工程运行中的水质研究     

崔瑜  谢振华  许苗娟 《城市地质》2006,1(2)

以北京市老城区雨洪控制与利用示范工程为背景．对天然降雨、不同下垫面雨水径流、示范工程处理过程雨水径流以及地下水水质进行分析研究,通过示范工程对雨洪的处理利用效果,探讨雨水回灌至地下能否对地下水环境产生负面影响。  相似文献   

地下水源热泵的水文地质设计     

王旭升  刘立才 《水文地质工程地质》2007,34(5):50-54

地下水源热泵是一种国内外正在迅速推广的新型节能环保型空调技术,但如果设计和运行管理不合理,会造成水资源的耗损和地质环境的破坏,因此需要加强其水文地质设计。地下水源热泵的水文地质设计包括水力学设计、热力学设计和地质环境保护设计。水力学设计的重点是维持地下水回灌能力,热力学设计的重点是防止回灌井导致的地下水过热和过冷,地质环境保护设计重点是防止水资源浪费和地下水污染。算例分析表明,抽灌井距的确定需要把水力学设计与热力学设计结合起来进行。  相似文献   

微地震监测技术在秦家屯地区的应用     

梁生  韩立国  李安帮 《吉林大学学报(地球科学版)》2007,(Z1)

详细阐述了微地震注水前缘监测的原理。应用微地震注水前缘监测系统,通过微地震信息的现场监测和解释,结合生产动态及其他监测资料综合分析,并以秦家屯地区的QK 3-5井为例,描述了秦家屯地区注水开发状态下水井水驱前缘位置,研究了地下油水运动规律,证明了方法的可靠性和实用性。结果表明,对于油田注水分析与研究微地震监测技术可以取得很好的效果。  相似文献