检索结果-南通市图书馆

modeling of titration experiments by a reactive transport model

Mining Science and Technology 2011年第2期21卷 273-276页

作者： Ma Hongyun Samper Javier Xin Xin Xi＇an Center of Geological Survey Xi＇an 710054 China Civil Engineering School University of A Corufia A Coruria 15008 Spain School of Environment and Resources Jilin university Changchun 130026 China

Acid mine drainage（AMD） is commonly treated by neutralization with alkaline *** treatment is supported by titration experiments that illustrate the buffering mechanisms and estimate the base neutralization capacity（BNC） of the *** explanation of titration curves requires modeling with a hydro-chemical *** this study the titration curves of water samples from the drainage of the As Pontes mine and the corresponding dumps have been investigated and six buffers are selerted by analyzing those *** curves have been simulated by a reactive transport model to discover the detailed buffering *** simulations show seven regions involving different buffering *** BNC is primarily from buffers of dissolved Fe,Al and hydrogen *** BNC can be approximated by：BNC = 3（C_（Fe）＋ C_（Al））＋ 0.05C_（sulfate）,where the units are mol/*** BNC of the sample from the mine is 9.25×10^（-3） mol/L and that of the dumps sample is 1.28×10^（-2） mol/L

关键词： Titration experiment reactive transport model Buffering mechanism Base neutralization capacity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Simulation of transport mechanism of radium isotopes in aquifer on the southern coast of Laizhou Bay

引用

Acta Oceanologica Sinica 2023年第8期42卷 40-48页

作者： Yancheng Wang Guangquan Chen Hongjun Yu Xingyong Xu Yinqiao Zou Wenqing Zhao Weitao Han Wenzhe Lyu Zhen Cui Runtian Ding Key Laboratory of Marine Geology and Metallogeny First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory for Marine Geology Laoshan LaboratoryQingdao 266237China Fourth Institute of Oceanography Ministry of Natural ResourcesBeihai 536000China Weifang Institute of Marine Development Weifang 261041China State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200241China Qingdao Hailukong Environmental Automatic-control Engineering Co. Ltd.Qingdao 266000China

Naturally occurring radium(^(223)Ra,^(224)Ra,^(226)Ra,and^(228)Ra)isotopes have been widely applied as geochemical tracers in marine environments,especially when estimating the submarine groundwater discharge(SGD).In this sense,the influencing factors and transport mechanism of radium isotope activity in aquifers can be key information for SGD *** work evaluates the adsorption/desorption behavior of^(224)Ra and^(226)Ra in the solid-liquid phase through a leaching experiment and analysis of field *** results suggested that radium isotope activity was positively correlated with salinity and grain size,in the case of abundant *** ion analysis,we found that the ions(Na^(+),Ca^(2+),Mg^(2+),and Ba^(2+))exchanged with radium isotopes in the process of transport.A 1-D reactive transport model was established to simulate the transport process of radium isotope in *** model successfully simulated the variation of radium isotope desorption activity with salinity and was subsequently verified in the *** study contributes to the understanding of the geochemical behavior of radium isotopes in aquifers and provides guidance for selecting a suitable groundwater endmember in SGD estimation.

关键词： radium adsorption/desorption behavior leaching experiment reactive transport model coastal aquifer Laizhou Bay

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comparative Study of Acid and Alkaline Stimulants with Granite in an Enhanced Geothermal System

引用

Acta Geologica Sinica(English Edition) 2021年第6期95卷 1926-1939页

作者： XU Jianan FENG Bo CUI Zhenpeng LIU Xiyao KE Zunsong FENG Guanhong Key Laboratory of Groundwater Resources and Environment Ministry of EducationJilin UniversityChangchun 130021China Engineering Research Center of Geothermal Resources Development Technology and Equipment Ministry of EducationJilin UniversityChangchun 130026China

The Enhanced Geothermal System(EGS) is an artificial geothermal system that aims to economically extract heat from hot dry rock(HDR) through the creation of an artificial geothermal reservoir. Chemical stimulation is thought to be an effective method to create fracture networks and open existing fractures in hot dry rocks by injecting chemical agents into the reservoir to dissolve the minerals. Granite is a common type of hot dry rock. In this paper, a series of chemical stimulation experiments were implemented using acid and alkaline agents under high temperature and pressure conditions that mimic the environment of formation. Granite rock samples used in the experiments are collected from the potential EGS reservoir in the Matouying area, Hebei, China. Laboratory experimental results show that the corrosion ratio per unit area of rock is 3.2% in static acid chemical experiments and 0.51% in static alkaline chemical experiments. The permeability of the core is increased by 1.62 times in dynamic acid chemical experiments and 2.45 times in dynamic alkaline chemical experiments. A scanning electron microscope analysis of the core illustrates that secondary minerals, such as chlorite, spherical silica, and montmorillonite, were formed, due to acid-rock interaction with plagioclase being precipitated by alkaline-rock interactions. Masking agents in alkaline chemical agents can slightly reduce the degree of plagioclase formation. A chemical simulation model was built using TOUGHREACT, the mineral dissolution and associated ion concentration variation being reproduced by this reactive transport model.

关键词： hot dry rock granite rock Enhanced Geothermal System chemical stimulation reactive transport model

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：