检索结果-南通市图书馆

Acta Geologica Sinica(English Edition) 2024年第1期98卷 241-249页

作者： NA Jin JIANG Xue shi zheming CHEN Yanmei Hubei Key Laboratory of Petroleum Geochemistry and Environment(Yangtze University) Wuhan 430100China School of Environmental Studies China University of GeosciencesWuhan 430074China School of Water Resources and Environment China University of GeosciencesBeijing 100083China State Key Laboratory of Water Resource Protection and Utilization in Coal Mining Beijing 100000China

Earthquake-related hydrochemical changes in thermal springs have been widely observed;however,quantitative modeling of the reactive transport process is *** the present study,we apply reactive transport simulation to capture the hydrochemical responses in a thermal spring following the Wenchuan Ms 8.0 and Lushan Ms 7.0 *** first constrain deep reservoir geothermal fluid compositions and temperature by multicomponent geothermometry,and then a reactive geochemical transport model is constructed to reproduce the hydrochemical evolution *** results show that the recharge from the shallow aquifer increases gradually until it reaches a peak because of the permeability enhancement caused by the Lushan earthquake,which may be the mechanism to explain the earthquake-related hydrochemical *** contrast to the postseismic effect of the Wenchuan earthquake,the chemical evolution can be considered as hydrochemical anomalies related to the Lushan *** study proves that the efficient simulation of reactive transport processes is useful for investigating earthquake-related signals in hydrochemical time series.

关键词： earthquake hydrochemical changes reactive geochemical transport model Kangding area

井水位气压效率计算方法的对比研究——以云南高大井为例

在线全文

学校读者我要写书评

暂无评论

地震研究 2024年第2期47卷 191-199页

作者：刘伟史浙明吕少杰齐之钰杨培杰中国地质大学(北京)水资源与环境学院北京100083 山东省国土空间生态修复中心山东济南250014

为了研究不同井水位气压效率计算方法的原理及差异性,基于2019年2月1日至2020年7月28日云南高大井的气压与水位数据,使用Clark方法、Rahi方法、回归反卷积法和Acworth方法计算了该井的气压效率BE值,分别为:0.4395、0.4968、0.6174和0.66... 详细信息

为了研究不同井水位气压效率计算方法的原理及差异性,基于2019年2月1日至2020年7月28日云南高大井的气压与水位数据,使用Clark方法、Rahi方法、回归反卷积法和Acworth方法计算了该井的气压效率BE值,分别为:0.4395、0.4968、0.6174和0.6654,平均值为0.5548。对比分析结果表明:Clark方法和Rahi方法的优点是计算简单方便,但是没有考虑时间滞后的影响;回归反卷积法可以获得BE值随滞后时间的变化情况,但是极易受到降水、蒸散发等信号的影响;Acworth方法考虑了固体潮信号并且避免了降水、蒸散发等信号的干扰,但是该方法仅适用于承压和半承压含水层中。最后,根据4种方法的特点和适用性,对不同目的下的井水位气压效应分析给出了相应的建议。

关键词：大气压力井水位气压效率云南高大井

基于多元分析的某地区垃圾填埋场地下水生态环境风险定量评价

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

现代地质 2024年第3期38卷 734-743页

作者：龚莉史浙明张宗文丁贞玉韩琳琳解子轩程天威张媛中国地质大学(北京)水资源与环境学院北京100083 生态环境部环境规划院北京100041

随着城市化进程加快,城市生活垃圾的产量不断增加,许多城市形成了大量非正规垃圾填埋场,这类填埋场缺少防渗装置,产出的渗滤液对填埋场及其附近地下水、土壤等造成潜在污染风险。科学地评估此类垃圾填埋场的环境风险,对分类管理和治理... 详细信息

随着城市化进程加快,城市生活垃圾的产量不断增加,许多城市形成了大量非正规垃圾填埋场,这类填埋场缺少防渗装置,产出的渗滤液对填埋场及其附近地下水、土壤等造成潜在污染风险。科学地评估此类垃圾填埋场的环境风险,对分类管理和治理垃圾填埋场以及科学地进行地下水污染防治具有重要意义。本文综合运用DRASTIC模型、层次分析法、聚类分析法等进行生态环境风险指标体系构建,以某地区14个垃圾填埋场为研究对象,评价其地下水生态环境风险。在评价过程中,主要考虑填埋场现状、填埋场的危险性、包气带的抗污能力、含水层脆弱性4个方面,依次对已选取的填埋场大小、实际填埋量、包气带黏性土层厚度等21个指标进行评价分级。结果显示,2号填埋场风险得分最低,为4.13分,5号填埋场风险得分最高,为7.95分,将填埋场评价得分进行分类后得到,3个垃圾填埋场风险指数为低风险,6个垃圾填埋场风险指数为中风险,5个垃圾填埋场风险指数为高风险。上述成果与前期专家打分评估的结果基本一致。本文提出的方法对于垃圾填埋场地下水污染风险具有参考意义,本研究成果对重点污染源风险的定量评价及科学管控也具有重要参考价值。

关键词：垃圾填埋场地下水污染风险评估渗滤液层次分析法

Relationship between the Earth tidal factor and phase lag of groundwater levels in confined aquifers and the Wenchuan M_s8.0 earthquake of 2008

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2013年第7期56卷 1722-1730页

作者： shi zheming WANG GuangCai School of Water Resources and Environment China University of Geosciences State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences

This work focuses on variations of the Earth tidal factor and phase lag derived from groundwater observations before and after major *** is based on an analysis of the data from four observational wells at boundaries between distinct active blocks of China *** wells are also situated on several active fault zones and have exhibited considerable responses to the Wenchuan Ms8.0 earthquake of 2008 in *** collected hourly records of water levels of these wells from 2007to 2009 and processed these data for *** tidal factors,phase lags,and phase-difference changes of tidal residuals of each well were *** found that when the Wenchuan quake happened,the tidal factors of the 4 wells were changing rapidly,while their phase lags and phase differences of tidal residuals declined swiftly,which may reflect the stress and strain changes of the well-aquifer system during the seismic generation.

关键词： tidal factor phase lag phase difference of tidal residual Wenchuan earthquake confined groundwater

场地污染地下水抽出处理系统井群加权优化方法研究

在线全文

学校读者我要写书评

暂无评论

水文地质工程地质 2024年第1期51卷 201-214页

作者：陈帆史浙明贾永锋臧永歌廉新颖姜永海冉泽宇尚长健中国环境科学研究院国家环境保护地下水污染模拟与控制重点实验室北京100012 中国地质大学(北京)水资源与环境学院北京100083

井群布设是地下水修复抽出处理技术的关键环节之一。为提高抽出处理技术的修复效率,以某污染场为研究对象,建立非线性-动态-多目标的模拟-优化模型,以污染物去除率最高、修复达标时间最短、资金成本最低为优化目标,设定单井、双井、三... 详细信息

井群布设是地下水修复抽出处理技术的关键环节之一。为提高抽出处理技术的修复效率,以某污染场为研究对象,建立非线性-动态-多目标的模拟-优化模型,以污染物去除率最高、修复达标时间最短、资金成本最低为优化目标,设定单井、双井、三井模式下不同的抽出流量,采用加权优化方法对井群布设方案进行对比计算。结果表明:整体而言单井模式修复效果较差,侧重资金成本时双井模式抽出方案修复效果整体较优,侧重达标时间成本时三井模式抽出方案修复效果整体较优;单井模式恒定流量抽出修复效果较优,多井模式下后期若适当降低抽出流量,可减少总抽出量,节省资金成本,井群动态管理可提高修复效率。研究验证了加权优化方法在井群优化应用中的灵活性和实用性,可为加权优化方法结合数值模拟方法在抽出处理技术的井群布设优化中应用提供参考。

关键词：污染地下水抽出处理技术加权优化方法多目标优化动态修复

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

地下水污染源解析方法研究进展

地质通报 2024年第1期43卷 153-162页

作者：冉泽宇贾永锋姜永海史浙明尚长健臧永歌陈帆廉新颖中国环境科学研究院/环境基准与风险评估国家重点实验室北京100012 中国地质大学(北京)水资源与环境学院北京100083 中国环境科学研究院/国家环境保护地下水污染模拟与控制重点实验室北京100012 中国核电工程有限公司北京100840

地下水污染具有隐蔽性,污染过程缓慢且难以治理,近年来中国高度重视地下水环境保护工作,作为支撑“以防为主”保护理念的地下水污染源解析技术研究已成为地下水污染防治领域的研究热点。介绍了国内外地下水污染源解析方面的主要技术方法... 详细信息

地下水污染具有隐蔽性,污染过程缓慢且难以治理,近年来中国高度重视地下水环境保护工作,作为支撑“以防为主”保护理念的地下水污染源解析技术研究已成为地下水污染防治领域的研究热点。介绍了国内外地下水污染源解析方面的主要技术方法,包括同位素法、荧光光谱法、地质统计学法、主成分分析法、正定矩阵因子分析模型、自组织映射技术6种常用方法的基本原理及在地下水污染识别领域的应用和研究动态,总结了这些方法的优缺点与适用性,并就上述方法在地下水污染研究中的应用前景和发展趋势进行了展望。

关键词：地下水污染源解析同位素法正定矩阵因子分析模型自组织映射技术

Advances in research on earthquake fluids hydrogeology in China:a review

在线全文

学校读者我要写书评

暂无评论

Earthquake Science 2013年第6期26卷 415-425页

作者： zheming shi Guangcai Wang Chenglong Liu School of Water Resources and Environment China University of Geosciences (Beijing) MOE Key Laboratory of Groundwater Circulation and Evolution China University of Geosciences (Beijing) State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences (Beijing) Institute of Geology China Earthquake Administration

Monitoring of subsurface fluid （underground fluid） is an important part of efforts for earthquake prediction in China. The nationwide network, which monitors groundwater level, water temperature, and radon and mercury in groundwater, has been constructed in the last decades. Large amounts of abnormal fluid changes before and after major earthquakes have been recorded, providing precious data for research in earthquake sciences. Many studies have been done in earthquake fluid hydrogeology in order to probe the nature of the earthquake. Much progress in earthquake fluid hydrogeology has been made in the last decades. The paper provides a review of the advances in research on earthquake fluid hydrogeology over the last 40 years in China. It deals with the following five aspects：（1） an introduction to the development history of monitoring networks construction; （2） cases of different subsurface fluid changes recorded before some major earthquakes which occurred in the last decades; （3） characteristics of subsurface fluid changes following major earthquakes; （4） mechanism of subsurface fluid changes before and following earthquakes; （5） application of earthquake fluids in the hydrogeology field.

关键词： Earthquake Subsurface fluid Monitoringwell networks Co-seismic Precursor

Preparation of hollow-fiber nanofiltration membranes of high performance for effective removal of PFOA and high resistance to BSA fouling

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2022年第12期34卷 14-24页

作者： Wenjing Tang Yunyi Meng Bin Yang Dongyu He Yan Li Bojun Li zheming shi Changwei Zhao College of Resources and Environmental Sciences China Agricultural UniversityBeijing 100193China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China The Fourth Construction CO.LTD of China Electronics System Engineering Tianjin 300130China State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China

Nanofiltration(NF)process has become one of the most promising technologies to remove micro-organic combined water *** a NF membrane material with efficient separation for perfluorooctanoic acid(PFOA)combined pollution is highly desired,this manuscript targets this unmet need *** this work,hydrophilic SiO_(2)nanoparticles with various contents blended with carboxylic multiwalled carbon nanotube were used to modify poly(m-phenylene isophthal amide)(SiO_(2)/CMWCNT/PMIA)hollow fiber NF *** modified membrane with 0.1 wt%SiO_(2)doping exhibits way better fouling resistance with irreversible fouling ratio decreased dramatically from 18.7%to 2.3%,and the recovery rate of water flux increases significantly from 81.2%to 97.7%.The separation experiment results had confirmed that the modified membrane could improve the rejection from 97.2%to 98.6%for perfluorooctanoic acid(PFOA)and its combined pollution with bovine serum albumin(BSA).It is clear that this reported SiO_(2)/CMWCNT/PMIA hollow fiber NF membrane potentially could be applied in water *** research also provides a theoretical basis for efficiently removal of PFOA and its combined pollution by NF membrane.

关键词： Nanofiltration SiO_(2)nanoparticles Perfluorooctanoic acid Combined pollution Water treatment

Coseismic response of groundwater level in the Three Gorges well network and its relationship to aquifer parameters

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2013年第25期58卷 3080-3087页

作者： shi zheming WANG GuangCai LIU ChengLong MEI JianChang WANG JinWei FANG HuiNa School of Water Resources and Environment China University of Geosciences (Beijing) MOE Key Laboratory of Groundwater Circulation and Environment Evolution School of Water Resources and Environment China University of Geosciences (Beijing) State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences (Beijing) Institute of Geology China Earthquake Administration Earthquake Administration of Hubei Province

The 12 May 2008 Ms 8.0 Wenchuan earthquake caused notable changes in the water levels of wells in the Three Gorges area. This work examines the relationship between these coseismic changes in water level and the changes in aquifer parameters. Three wells in the area with good responses to earth tide were chosen for analysis. Water-level data from February to June 2008 were used to calculate the aquifer transmissivity, permeability and specific storage of the rocks, and analyze the relationship between the coseismic responses of the wells and their aquifer parameters. The results show that the Wenchuan earthquake changed these parameters considerably, thereby controlling co- and postseismic variations of water level. The values of these parameters prior to the earthquake are linearly related with the amplitudes of coseismic variations in water level. The larger the aquifer transmissivity, the more remarkable the coseismic change in water level. During the earthquake, changes in aquifer parameters were found to be associated with coseismic variations in water level, with the larger changes occurring when the coseismic variation in water level was larger. The tectonic setting has a certain degree of influence on the co- and postseismic changes in water level. The permeability structures of the fault zone appear to determine the manner of coseismic variation in water level. Moreover, it seems that the water level in wells where groundwater converges more easily can recover faster following an earthquake. Insight from this study helps to improve understanding of the characteristics of water-level changes caused by earthquakes.

关键词：含水层参数地下水位三峡井网水位变化大地震三峡库区地球潮汐水位数据

在线全文

学校读者我要写书评

暂无评论

白术多糖提取分离工艺研究

中华中医药学刊 2024年第5期42卷 41-45,I0016页

作者：彭静潘东梅潘东莲史哲铭袁婧玮曾雄龙黄裕成易延逵湘西自治州人民医院吉首大学第一附属医院湖南吉首416000 南方医科大学中医药学院广东广州510515

目的优选白术多糖的提取分离工艺。方法比较氯仿-正丁醇Sevage法去蛋白与不去蛋白白术多糖含量。以吸附率和解吸率为考察指标,优选AB-8型、D101型、LX-38型3种大孔吸附树脂。通过吸附时间、解吸时间、上样流速、上样浓度、洗脱剂用量、... 详细信息

目的优选白术多糖的提取分离工艺。方法比较氯仿-正丁醇Sevage法去蛋白与不去蛋白白术多糖含量。以吸附率和解吸率为考察指标,优选AB-8型、D101型、LX-38型3种大孔吸附树脂。通过吸附时间、解吸时间、上样流速、上样浓度、洗脱剂用量、洗脱剂浓度和洗脱流速研究AB-8型大孔树脂纯化白术多糖工艺。结果未去蛋白的多糖含量为(5.582±1.4480)%、(5.407±0.7668)%、(5.155±0.7214)%,Sevage法去蛋白后的多糖含量为(4.658±0.1558)%、(4.247±0.0742)%、(4.610±0.1734)%。AB-8型大孔树脂较其他两种树脂,其吸附率及解吸率可达(18.40±0.0300)%,(91.73±0.0781)%,纯化工艺为吸附时间3 h、解吸时间3 h、上样流速1 BV/h、上样浓度0.75 mg/mL、洗脱剂用量4 BV、洗脱剂浓度15%乙醇、洗脱流速3 BV/h。结论本试验为白术多糖的提取分离提供了试验依据,为白术多糖的工业化生产提供了参考。

关键词：白术多糖提取分离大孔吸附树脂

维普期刊数据库博看期刊