典型文献
Use of δ18O,δ13C and NO3-to identify hydrogeochemical processes related to contamination in an aquifer located in central Mexico
文献摘要：
In this work,an isotopic analysis of δ18O,δ13C,and NO3 concentrations was carried out to identify the origin and the processes related to the contamination of an aquifer located in the state of Guanajuato,Mexico.The research identified the possible sources of δ13C in groundwater.During groundwater flow,CO2 participates in different hydrogeochemical reactions in which the disso-lution of carbonates or biochemical processes related to biodegradation stand out.Isotopic data of δ13C,δ18O,and the hydrogeochemical behavior of NO3-and HCO3-in water,in addition to isotopic data and the chemical com-position of limestones in the study area,were determined to establish the isotopic signature and the processes under-gone by the rocks.The isotopic signature of rock and water samples indicated that metamorphic limestones contributed with carbon dioxide to deep groundwater,while in the upper aquifer,bacterial metabolic reactions during nitrifi-cation-denitrification could modify the isotopic signature of δ13C in some wells,although atmospheric contribution also plays a role.The modification of the carbon isotopic component is related to the precipitation of calcite in specific regions of the study area,input of atmospheric CO2,and soil(e.g.the possible participation of C4-type plants in the assimilation-release of carbon).This process is not confirmed or completely ruled out in this study since agriculture is excessively developed throughout the region.The joint interpretation of isotopic values and the hydro-geochemical behavior of major and conservative elements help in identifying possible pollution processes in which different carbon sources are related.
文献关键词：
中图分类号：
作者姓名：
José Iván Morales-Arredondo;María Aurora Armienta Hernández;Fátima Juárez-Aparicio;Jorge Federico Landa-Arreguín;Itzamna Zaknite Flores-Ocampo
作者机构：
Natural Resources Department,Institute of Geophysics,National Autonomous University of Mexico,Ciudad Universitaria No.3000,Col.Copilco Universidad,Coyoacán Delegation,04360 Mexico,CDMX,Mexico;Earth Sciences Postgraduate Program,University National Autonomous of Mexico,University City No.3000,Col.Copilco University,Coyoacán Delegation,04510 Mexico,CDMX,Mexico
文献出处：
引用格式：
[1]José Iván Morales-Arredondo;María Aurora Armienta Hernández;Fátima Juárez-Aparicio;Jorge Federico Landa-Arreguín;Itzamna Zaknite Flores-Ocampo-.Use of δ18O,δ13C and NO3-to identify hydrogeochemical processes related to contamination in an aquifer located in central Mexico)[J].地球化学学报（英文版）,2022(03):367-392
A类：
Guanajuato,nitrifi
B类：
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AB值：
0.497799
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